WorldWideScience

Sample records for energia eletrica metodos

  1. Variables that influence in the consumption of electrical energy; Variables que influyen en el consumo de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Ramos Niembro, Gaudencio; Fiscal Escalante, Raul; Maqueda Zamora, Martin [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico); Sada Gamiz, Jesus; Buitron Sanchez, Horacio [Comision Federal de Electricidad (Mexico)

    1999-07-01

    It is said that when a program of saving and efficient use of the electrical energy is implemented it must be business for three: user, society and electrical utility. Regarding to the user his decision making is very simple: it is to me more cheap or more expensive, the benefit for the society can be seen from very diverse aspects, being the most important conservation of the natural resources and the environment, as far as the electric utility factors of more weight are the differing of investments and the reliability of the system. The present paper shows the importance of monitoring of the ways of energy use in different types of users, to be able to make decisions of programs: ALD, DMS (Demand Side Management) in very diverse scenarios: cities, types of users, income levels et cetera. [Spanish] Se dice que cuando se implanta un programa de ahorro y uso eficiente de la energia eletrica debe ser negocio para tres: usuario, sociedad y empresa eletrica. En lo que respecta al usuario su toma de decision es muy simple: me resulta mas barato o mas caro, el beneficio para la sociedad puede verse desde muy diversos aspectos, siendo el mas importante la conservacion de los recursos naturales y el medio ambiente, en cuanto a la empresa los factores de mas peso son el diferimiento de inversiones y la confiabilidad del sistema. En el presente trabajo se muestra la importancia que tiene el monitoreo de las formas de uso de la energia en diferentes tipos de usuarios, para poder tomar decisiones de programas ALD, DMS por sus siglas en ingles (Demand Side Managenment) en muy diversos escenarios: ciudades, tipos de usuarios, niveles de ingresos, etcetera.

  2. Reflections of ANEEL criteria for quality in the supply of electrical energy; Reflexoes sobre criterios da Aneel para a qualidade no fornecimento da energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Ramos, Maria Olivia de Souza [Universidade Salvador (UNIFACS), BA (Brazil)], email: molivia@unifacs.br; Mello, Sergio Souto Maia Malbouisson de [Companhia de Eletricidade do Estado da Bahia (COELBA), BA (Brazil)], email: smello@coelba.com.br

    2010-07-01

    This article presents an analysis of the changes implemented by the Brazilian Electricity Regulatory Agency - ANEEL (Agencia Nacional de Energia Eletrica) to monitor and control the indices related to the continuity of electric power supply. It also presents the evolution of the amount of fines, in case of failure of attending the quality indicators, both the collective and the individual ones. Finally, it presents some issues which need further analysis regarding to the limits of time established to the restoration of the energy supply after a power failure. (author)

  3. Electronic meter with custom integrated circuit for electric energy measurement; Medidor eletronico de energia eletrica com circuito integrado dedicado

    Energy Technology Data Exchange (ETDEWEB)

    Caldas, Roberto Pereira

    1990-04-01

    The design and implementation of an electrical energy electronic meter for operation at low voltages, according to two steps of development carried out in Centro de Pesquisas de Energia Eletrica - CEPEL is described. In the first step, an electronic meter with discrete commercial components has been developed, in order to demonstrate to the Brazilian power suppliers the feasibility of such a device for electrical energy metering and charging. The second step was constituted by the design of an integrated circuit, aiming the reduction of the cost of the meter as well as the enhancement of its reliability. Several techniques of electrical energy measurement are presented. The meter with discrete components makes use of a time division multiplier (TDM), in order to determine the active power in the load. Voltage and current levels have been reduced through the use of voltage and current sensors compatible with the TDM's inputs. A V-F converter employing continuos integration, has been used for the determination of the energy consumed by the load through the integration of the TDM's output signal. Most of the discrete components of the meter have been replaced by the dedicated integrated circuit. The TDM has remained essentially the same, but the V-F converter has been changed into a dual-slope one, which is more adequate for implementation in a single chip. The tests performed with the prototypes of the meter including both the meter with discrete components and the meter with the custom-made integrated circuit have presented measurement errors of less the 0,2 %. The initial goal, according to Brazilian specifications of electromechanical meters and international specifications for electronic meters, was 1 %. (author)

  4. Electronic meter with custom integrated circuit for electric energy measurement; Medidor eletronico de energia eletrica com circuito integrado dedicado

    Energy Technology Data Exchange (ETDEWEB)

    Caldas, Roberto Pereira

    1990-04-01

    The design and implementation of an electrical energy electronic meter for operation at low voltages, according to two steps of development carried out in Centro de Pesquisas de Energia Eletrica - CEPEL is described. In the first step, an electronic meter with discrete commercial components has been developed, in order to demonstrate to the Brazilian power suppliers the feasibility of such a device for electrical energy metering and charging. The second step was constituted by the design of an integrated circuit, aiming the reduction of the cost of the meter as well as the enhancement of its reliability. Several techniques of electrical energy measurement are presented. The meter with discrete components makes use of a time division multiplier (TDM), in order to determine the active power in the load. Voltage and current levels have been reduced through the use of voltage and current sensors compatible with the TDM's inputs. A V-F converter employing continuos integration, has been used for the determination of the energy consumed by the load through the integration of the TDM's output signal. Most of the discrete components of the meter have been replaced by the dedicated integrated circuit. The TDM has remained essentially the same, but the V-F converter has been changed into a dual-slope one, which is more adequate for implementation in a single chip. The tests performed with the prototypes of the meter including both the meter with discrete components and the meter with the custom-made integrated circuit have presented measurement errors of less the 0,2 %. The initial goal, according to Brazilian specifications of electromechanical meters and international specifications for electronic meters, was 1 %. (author)

  5. Universalization of electric power service: revision of targets and penalties; Universalizacao dos servico de energia eletrica: metas estabelecidas e a revisao das penalidades

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Cleber Ribeiro da Silva [Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis (ANP), Rio de Janeiro, RJ (Brazil); Pereira, Osvaldo Livio Soliano [Universidade Salvador (UNIFAC), BA (Brazil); Lyra Junior, Renato de Almeida [Centro Universitario Jorge Amado (UNIJORGE), Salvador, BA (Brazil)

    2010-07-01

    The electric universalization service through the Light for All Program and the targets set by ANEEL needs instruments of improvement for the purpose of universalization. The present work has therefore aims to evaluate the goals of universalization of electricity established by ANEEL, and the review of these under the program 'Luz para todos' and discuss the penalties for non-compliance. The work was based on studies related to the composition of the 'Luz para todos', ANEEL's standards governing this sector, bibliographic and documentary. Was used data from the goals COELBA's universalization, as a case study to evaluate the 'Plano de Universalizacao de Energia Eletrica' the concessionaire with the results. Was established the need for better regulation of the penalties provided by law, distinguishing between the types of administrative sanctions, that make up the fines, penalties awarded specifically to combat the diversion goals of universalization. (author)

  6. Cost system applied in company of generating and transmitting electric energy - CHESF; Sistema de custos aplicado em empresa geradora e transmissora de energia eletrica - CHESF

    Energy Technology Data Exchange (ETDEWEB)

    Couto, Crisalvo Sampaio, e-mail: Crisalv@chesf.gov.br

    2010-07-01

    This paper introduces the Operational Costs System 'SCOPES', developed by Companhia HidroEletrica do Sao Francisco - CHESF, with the objective of providing the leadership, knowledge of costs and expenditures generated in the various activities of the cost formation chain, enabling effective monitoring and management of resources incurred in the chain.

  7. Observability in electric power networks: identification critical measures methods; Observabilidade em redes de energia eletrica: metodos de identificacao de medidas criticas

    Energy Technology Data Exchange (ETDEWEB)

    London Junior, Joao Bosco Augusto

    1997-07-01

    One of the most important functions of the control and operation centers is to maintain service reliability in a electrical power system. In order to obtain a reliable operation of the power system, it is important to identify the critical measurements, and then to improve the measurement system using pseudo measurements. The goal of this work is to determine more efficient methods for critical measurement identification. A brief review of the some methods for observability analysis as well as two methodologies to identify critical measurements are presented. The first method has a combinatorial nature; the second one is supported by uni modular M matrix (incidence matrix of measurements for branches) and A matrix (incidence matrix of branch for nodes). The second method needs a combinatorial algorithm to be feasible, so that it becomes a slow method. Two new methods for critical measurements identification are presented in this work: the first one is based on the theory developed by Bretas (1996a), to analyse observability using graph paths; the second methods is supported y the Slutsker and Scudder (1987) theory, where identification is reached throughout the analysis of the jacobian matrix. (author)

  8. A historical analysis of the evolution of the program efficiency 'Low income households consumers of electrical energy' in the interior of Sao Paulo state; Uma analise historica da evolucao da eficiencia do programa 'Consumidor de baixa renda de energia eletrica' no interior do estado de Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Jose Antonio Siqueira [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Eletrica e de Computacao. Dept. de Eletronica e Microeletronica], e-mail: siqueira@demic.fee.unicamp.br; Tavares, Mauricio Lopes [Escola Superior de Agricultura Luiz de Queiroz (ESALQ/USP), Piracicaba, SP (Brazil). Dept. de Economia, Administracao e Sociologia], e-mail: mautavar@uol.com.br

    2004-07-01

    An analysis of the criteria used to select the beneficiaries of the federally-funded social program 'Consumidor de baixa renda de energia eletrica (Low Income Households Consumers of Electrical Energy)' in the State of Sao Paulo is presented. The study is based on statistical data obtained from the database of Companhia Paulista de Forca e Luz - CPFL, one of the most important electrical energy distributor in the mentioned region. The concept of 'low income household' is also discussed, based on studies presented by IBGE - Instituto Brasileiro de Geografia e Estatistica and by FIPE - Fundacao Instituto de Pesquisas Economicas, comparing the expected number of low income households with the actual number of consumers who receive the subsidy. (author)

  9. Electric power generation from the biogas originated at the sewage treatment; Geracao de energia eletrica a partir do biogas proveniente do tratamento de esgoto

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Velazquez, Silvia Maria Stortini Gonzalez; Pecora, Vanesa; Abreu, Fernando Castro de [CENBIO - Centro de Referencia Nacional em Biomassa, Sao Paulo, SP (Brazil)]. E-mails: suani@iee.usp.br; sgvelaz@iee.usp.br; vpecora@iee.usp.br; fcabreu@terra.com.br

    2006-07-01

    The PUREFA - Programa de Uso Racional de Energia e Fontes Alternativas, had three main goals: to implant measurements of management and energy efficiency actions allowing the reduction of electric power consumption at the University; amplify the distributed generation at USP from renewable and non conventional energy resources, and to implant incentive policies for the efficient and rational use of energy. Among the fourteen goals integrating this project, the CENBIO - Centro Nacional de Referencia em Biomassa - compromised itself with the realization of two goals. The activities included the implementation of a system for impounding, purification and storage of the biogas generated by a bio digester, Anaerobic Flux Ascendent Reactor (RAFA) localized at the CTH - Centro Tecnologico de Hidraulica - at USP campus beside the electric power generation by using the biogas stored as fuel in a Otto cycle engine.

  10. Avaliação de processo de revisão tarifaria pedriodica das concessionarias de distribuição de energia eletrica no Brasil

    OpenAIRE

    Julio Cesar Ferreira Sales

    2009-01-01

    Resumo: A dissertação tem origem nas avaliações da regulação econômica do setor de energia elétrica no Brasil, a partir do processo de revisão tarifária periódica implementada pela ANEEL que considera a metodologia de "reposicionamento tarifário". Essa metodologia acabou por gerar injustiças tarifárias com a elevação das tarifas dos consumidores das áreas de concessão economicamente menos desenvolvidas e redução das tarifas daquelas mais desenvolvidas. A identificação da condição inicial de e...

  11. Capital rewarding of the electric power enterprises: a comparative analysis; Remuneracao de capital das distribuidoras de energia eletrica: uma analise comparativa

    Energy Technology Data Exchange (ETDEWEB)

    Rocha, Katia; Braganca, Gabriel Fiuza de [Instituto de Pesquisa Economica Aplicada (IPEA), Brasilia, DF (Brazil)]. E-mails: katia@ipea.gov.br; gabriel@ipea.gov.br; Camacho, Fernando [Banco Nacional de Desenvolvimento Economico e Social (BNDES), Rio de Janeiro, RJ (Brazil)]. E-mail: camacho@bndes.gov.br

    2006-07-01

    We analyze the electricity distribution segment in Brazil from 1998 to June 2005, trying to assess whether the return on capital invested was in line with the risk and opportunity cost required in the segment. We conclude that the return on capital in this segment in Brazil was systematically negative until 2003. Only in 2005 did the distribution segment really begin to recover, presenting profitability partly consistent with the estimated cost of capital. Comparisons with Argentine, Chilean and American companies reveal that firms in the latter two countries, particularly in Chile, generally managed to reward shareholders according to the opportunity cost of capital. We find evidence of differential effects of regulatory characteristics between the price-cap and cost-plus regimes in the segment's financial profitability, since the return on capital invested was more uniform and predictable in American companies, which are subject to regulation by an internal rate of return or cost-plus mechanism, than in Brazilian firms, subject to price-cap regulation. Among the groups with greater return to profitability after the rationing episode in Brazil in 2002 are EDP Brazil, CPFL Energia, Neoenergia and starting in 2004, Elektro and companies still in government hands. The EDF Group performed the worst in the study period, with negative returns from 1999 onward. (author)

  12. Proposed method for the hydraulic design of ski-jump energy dissipators in dam spillways considering the occurrence of scour holes downstream of the structure; Metodo propuesto para el diseno hidraulico de trampolines empleados como disipadores de energia en aliviaderos para presas, considerando la ocurrencia del cono de socavacion al pie del mismo

    Energy Technology Data Exchange (ETDEWEB)

    Pardo-Gomez, Rafael [Centro de Investigaciones Hidraulicas (Cuba)

    2008-04-15

    Ski-jump energy dissipators are widely used in hydraulic engineering because of their well-known effectiveness. Nevertheless, some uncertainty exits associated with the dimensions of the scour hole appearing downstream of the structure. This paper presents a new method for solving this problem. This method includes spillway stability checking as part of the design process and also stability checking of any other construction near the energy dissipation zone. [Spanish] Los disipadores de energia tipo trampolin tienen amplia utilizacion en la practica de la ingenieria hidraulica por su probada eficacia; sin embargo, su diseno esta sujeto a cierto grado de incertidumbre en cuanto a la prediccion de las dimensiones del cono de socavacion que habra de producirse aguas abajo de la estructura. En el presente trabajo se muestra un metodo novedoso, mediante el cual el autor soluciona el aspecto antes referido, toda vez que se incluye como parte del proceso de diseno la comprobacion de la estabilidad del propio aliviadero o de cualquier otra obra cercana a la zona de disipacion de energia.

  13. Metodologia para estimativa do potencial de conservação de energia eletrica residencial pelo uso de coletores solares planos em uma região e sua aplicação na cidade de Campinas

    OpenAIRE

    Marco Vinicio Yanez Salcedo

    2002-01-01

    Resumo: Neste trabalho, apresenta-se uma metodologia que permite fazer uma estimativa do potencial de conservação de energia elétrica em uma região pelo uso de coletores solares planos para aquecimento de água residencial. A metodologia utiliza basicamente índices sócio-econômicos e climatológicos, assim como também a aplicação de questionários nos setores envolvidos (fabricantes, distribuidores e consumidores de coletores solares planos) e técnicas básicas de amostragem. A partir do número d...

  14. Methods of statistical analysis, dimensioning and determination of production of electric power for description of the scheme applied to wind in Botucatu/ SP region, Brazil; Metodos de analise estatistica, dimensionamento e determinacao da energia eletrica produtivel para descricao do regime eolico aplicados na regiao de Botocatu-SP

    Energy Technology Data Exchange (ETDEWEB)

    Gabriel Filho, Luis Roberto Almeida [Universidade Estadual Paulista Julio de Mesquita Filho (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas], email: gabrielfilho@tupa.unesp.br; Cremasco, Camila P. [Faculdade de Tecnologia (FATEC), Presidente Prudente, SP (Brazil); Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Dept. de Bioestatistica; Verri, Juliano A. [Universidade Estadual Paulista Julio de Mesquita Filho (FCT/UNESP), Presidente Prudente, SP (Brazil). Dept. de Matematica, Estatistica e Computacao; Viais Neto, Daniel dos S. [Faculdade de Tecnologia (FATEC), Presidente Prudente, SP (Brazil); Universidade Estadual Paulista Julio de Mesquita Filho (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas; Seraphim, Odivaldo J. [Universidade Estadual Paulista Julio de Mesquita Filho (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Engenharia Rural

    2011-07-01

    The wind energy is an abundant source of renewable energy, clean and available almost everywhere. For its use, studies are needed to adequately describe its intensity for statistical methods and design for wind turbines. The objective is to structure the mathematical methods used to conduct a general description of the wind, to establish a description of the wind regime using the parameters described using the Weibull function and the analytical model of power from a wind turbine, as well as applications of these methods show. This work was developed at Rural Empowerment Lab of FCA/UNESP in Botucatu-SP. For the application of methods were utilized measurements of wind speed and direction, between 2004 and 2005, obtained by anemometer RM Young Wind Monitor-Campbell. As a result, they estimated the wind behavior and distribution of wind in the region, with 78 kWh of energy production, relatively low potential to supply a small house. Moreover, this energy could possibly be applied in ambient illumination, power supply for electric fences and irrigation of vegetables. (author)

  15. Annual statistic report - Furnas Centrais Eletricas S.A. - 1995

    International Nuclear Information System (INIS)

    1995-01-01

    In this report, extensive statistical data concerning the 1994 activities of the electric utility Furnas Centrais Eletricas S.A. are presented. They include the consumer's market, the generation and supply of electricity and economic and personal information. 106 figs., 71 tabs

  16. Annual Report - Furnas Centrais Eletricas S.A. - 1997

    International Nuclear Information System (INIS)

    1998-01-01

    The annual report of 1998 of Furnas Centrais Eletricas S A - Brazilian electric power generation and transmission company - introduces the following main topics: Furnas system; production and supply; economic and financial data; personnel; transmission system in operation; electricity market; market, planning and construction; and generation expansion

  17. Commercial statistical bulletin of the Brazilian electric utility Centrais Eletricas de Santa Catarina S.A

    International Nuclear Information System (INIS)

    1996-04-01

    Statistical data concerning the Brazilian Centrais Eletricas de Santa Catarina S.A. utility relative to April 1996 are presented. They include, among other things, electricity consumption, number and class of consumers and electricity rates

  18. Building four centres for demonstration of renewable energies in different regions of Brazil; Criacao de quatro centros de demonstracao de energias renovaveis em diferentes regioes do pais

    Energy Technology Data Exchange (ETDEWEB)

    Galdino, Marco Antonio; Dutra, Ricardo Marques; Bezerra, Lauro Barde; Ramos, Marcia da Rocha [Centro de Pesquisas de Energia Eletrica (CEPEL), Rio de Janeiro, RJ (Brazil)], Emails: marcoag@cepel.br, dutra@cepel.br, laurobb@cepel.br, marciar@cepel.br; Hommerding, Luis Carlos; Motta, Sergio Luiz Souza [Servico Nacional de Aprendizagem Industrial (SENAI/DN), Brasilia, DF (Brazil)], Emails: LuisHommerding@dn.senai.br, slmotta@dn.senai.br

    2010-07-01

    This article presents the projects of four Centres for Demonstration of Renewable Energies, to be build within an agreement between CEPEL (Electric Power Research Center - Centro de Pesquisas de Energia Eletrica) and SENAI (National Institute for Industrial Education - Servico Nacional de Aprendizagem Industrial). This agreement aims to replicate the successful experience of The Solar House of CEPEL. With a budget of circa one million reais, these Centres will include two Solar Houses (SENAI-DF and SENAI-MA), a mobile unit mounted in a van (SENAI-PR), as well as another mobile unit mounted in a boat (SENAI-AM). Using these centres as learning material, it is expected that SENAI, an institution with the well-known competence in technical education, will be prepared to increase the amount of technical personnel qualified in photovoltaics. It is also expected that these Centres will incentive the use of such technologies throughout the country. (author)

  19. Commercial statistical bulletin of the Brazilian electric utility Centrais Eletricas de Santa Catarina S.A; Boletim estatistico comercial da CELESC: Centrais Eletricas de Santa Catarina S.A

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-04-01

    Statistical data concerning the Brazilian Centrais Eletricas de Santa Catarina S.A. utility relative to April 1996 are presented. They include, among other things, electricity consumption, number and class of consumers and electricity rates 6 figs., 50 tabs.

  20. Biodiesel and electrical energy to overall development; Biodiesel e energia eletrica para o desenvolvimento social

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Maisa Medeiros Pacheco de [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil)

    2008-07-01

    The energy is everything around you. Everything that is matter haves energy, organic or not. The energy can manifest itself in many forms. The most common forms are the kinetic, nuclear, thermal, hydro, solar, wind and electric energies. They can be subdivided in secondary and primary energies. The primary energies are those forms of energy that are directly in nature and not suffered any processing, such as wind energy. While the secondary are those that have suffered interference of man and is already present in the way will be used for him. However, in this work the electric energy will have a greater focus, due to its importance in daily life of civilization current. The electricity is seen, actually, as essential to social development, enabling the improvement of the living conditions of poor people. Through access to electric energy, such people could benefit from better conditions of health, education, work, leisure, information, security, finally, may considerably improve their condition of life. To promote universal access to energy, the federal government implemented some public policies, including the National Programme of Biodiesel, vital to the promotion of social development of the country. (author)

  1. Consumers free of electric power. A practical vision; Consumidores livres de energia eletrica. Uma visao pratica

    Energy Technology Data Exchange (ETDEWEB)

    Florezi, Guilherme

    2009-07-01

    In the new environment of the Brazilian electric power sector, since the changes in the institutional model beginning in 1993, electrical sector agents entered into a highly competitive market, particularly in the case of the consumers which have had the possibility to choose their supplier of electricity in accordance with rules and restrictions that have been modified over the years. The consumer that fits this profile, was named free consumer whom in accordance with the rules and restrictions dictated by the National Electric Energy Agency (ANEEL), will have the option of electrical energy delivery through other companies, instead of the company that holds granting of the area where the consumer in question is physically located. The other costumers, that could not be qualified as free, remain captive, unable to choose for their supply from outside the area where the original grant is located. The studies presented here are an important starting point for research on free energy consumers and their behavior in order to provide subsidies to the readers to get a better understanding of the history of the Brazilian energy sector and the free market, with emphasis on free consumers, to thereby enable their potential bases for a possible study of migration to the free market . (author)

  2. Gasification for electric energy production; Gaseificacao para producao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Moraes, Paulo Luiz Jardim de [Light Servicos de Eletricidade SA, Rio de Janeiro, RJ (Brazil)

    1988-12-31

    Development and research activities that lead the Fuel Gas Project into a success demonstrate the viability of using charcoal gas as an alternative fuel for diesel - driven electric generators. This viability came clear when satisfactory results were achieved in the reducing of oil and charcoal consumption as well as in the durability of diesel engines. All this adds up to great social benefits that arise from its use in the electric generation in northern Brazil and mid-west regions. (author) 17 figs., 7 tabs.

  3. Pricing of contract options for electric power; Precificacao de contrato de opcoes de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Takahashi, Leticia; Gunn, Laura Keiko; Correia, Paulo B. [Universidade Estadual de Campinas (FEM/UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Energia

    2008-07-01

    The reorganization of the electric sector has improved the opportunity of energy trade through contracts, which have to be considered on the risk evaluation for generating companies. Different types of contracts have been used in electric energy commercialization. This work develops a model for option contract pricing. The classic model of options pricing used in the financial market is based in Black- Scholes. Due to the inherent feature of the Brazilian electrical system, with a strong predominance of hydroelectricity, the seasonal swing of the electricity price is the main source of contractual risk. So, the Black-Scholes model very is not adjusted. To deal with the uncertainties, this work uses an approach based on analysis of scenarios and binomial trees. Case studies are analyzed with binomial tree to calculate the price of the option contract. (author)

  4. Schemes for protecting electric power systems; Esquemas de protecao de sistemas de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Paulo Cesar de

    2002-07-01

    The objective of this dissertation is to accomplish an introduction to the studies and the applications of the System Protection Schemes (SPS) used to maintain the electric power systems safety. A small group of definitions and concepts from the 'protection, reliability and power systems performance analysis' areas is presented with the objective of distinguishing SPS from the conventional system component protections. It also helps in understanding the functions of the SPS with more clarity. The SPS are used to maintain the integrity of the system when it is submitted to phenomena that provoke instability or cascade circuit outages. The classification and the description of these phenomena, as well as the SPS application are shown in this dissertation. The general structure of the SPS, the ways of classifying them and the different actions used by SPS to control the disturbances are the objectives of the analysis of this work. In order to exemplify, a vision is given of how the SPS are located in the Brazilian interconnected system (BIS) and also in the rest of the world. Some SPS used in Brazil deserved special attention. The analyses of the main blackouts that occurred in Brazil and in North America are presented, in a summarized term, in appendix I. Considerable knowledge is obtained from these analyses, leading to implementation measures that minimize the risk of interruptions in the energy supply. A comparison is also made of the degree of severity of the great blackouts that happened in Brazil and, for the two largest, an estimate of their respective interruption costs is made. In appendix II, an attempt was also made to establish the basic requirements for the SPS implementation using micro processing technology. Based on the experience lived during the studies developed by the group that analyzed the safety of the Bis after the blackout on March 11/1999, criteria and procedures to analyze the safety of the system and to accomplish studies of SPS implantation were established. Finally, a brief study of the BIS is done, where the SPS performances are analyzed to verify the ability to control serious emergencies that can happen in the present moment. (author)

  5. Scenarios of power transmission networks; Cenarios de redes de transmissao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Souza Fonseca, L.G. de; Savi, T C.O.; Morozowski Filho, M; Camargo, C C [ELETROSUL, Florianopolis, SC (Brazil)

    1985-12-31

    This work discusses the electrical network expansion considering long term horizons and a purpose of methodology for the establishment of transmission network scenarios. As part of the transmission scenario studies the network expansion problem is described by linearized power flow models and, for transmission system analysis and synthesis, the minimum effort criteria and interactive SINTRA program are used. 4 refs., 3 figs., 2 tabs.

  6. Electric power transport costs - methodologies analysis; Custos de transporte de energia eletrica: analise de metodologias

    Energy Technology Data Exchange (ETDEWEB)

    Takahata, Dario

    1997-07-01

    The dissertation presents the aspects related to the restructuring of power systems in terms of international experiences, and the possible implications for the definition of the new power system in Brazil. The experience shows that the reform in various countries has started from the sector deverticalization, together with the transmissions open access scheme. The retrospect of researched countries indicates that the transmissions remuneration is based on a methodology that recovers the operative cost of transmission transactions, along with an additional amount that take into account the cost of the existing transmission system. The following countries have been analyzed: Chile, Norway, England and Argentina. This work also shows the current situation in Brazil, as in terms of tariffs, as regarding the power system organizational structure, as well as a preliminary proposal conceived by SINTREL (National System of Electrical Energy Transmission) to evaluate the transmission transaction cost. This dissertation ended with comments and conclusions, depicting a future program which might be followed, considering the aspects quoted above and the peculiarities of brazilian power system. (author)

  7. Silviculture and electric energy distribution; Arborizacao e a distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Eyde Cristianne Saraiva dos; Oliveira, Fernanda Miranda de; Figueiredo Junior, Jackson de Freitas; Moura, Rodolfo Pessoa de Melo [Universidade Federal do Amazonas (UFAM), Manaus, AM (Brazil). Dept. de Engenharia Agricola e Solos], e-mail: eyde_cristianne@yahoo.com.br

    2008-07-01

    The electricity transmission line route travels long distances to reach the point of delivery. But along that route are the components of trees that if not managed properly touch the drivers or processors can turn off part of the network, causing inconvenience to consumers and urgency in the maintenance of the network by the concessionaire of electric energy. To avoid such problems it is necessary to adopt a program of pruning trees and set components with characteristics of easy management. The research aims to contribute presented with recommendations concerning the establishment of post and trees, respecting environmental legislation. (author)

  8. The electric power in Latin America; A energia eletrica na America Latina

    Energy Technology Data Exchange (ETDEWEB)

    Moura Coutinho, Berenice Cabral de [Sao Paulo Univ., SP (Brazil). Inst. de Historia; Bernini, Eduardo Jose [Agencia para Aplicacao de Energia, Sao Paulo, SP (Brazil); Silva, Demostenes Barbosa da [Companhia Energetica de Sao Paulo, SP (Brazil)

    1990-02-01

    This paper shows a study for determination of the possibilities and the perspectives of power distribution systems integration between Brazil and the neighbor countries, for electric power supply. This integration aims the electric power supply of the different regions of the countries with the minimum cost alternative. The stand-by and emergency supply will be obtained with this action, minimizing the occurrence of supply disruptions in the interconnected countries 4 refs., 7 figs., 7 tabs.

  9. Mis on Roheline Energia? / Kadi Laid

    Index Scriptorium Estoniae

    Laid, Kadi, 1976-

    2004-01-01

    Tuule- ja vee-energia kasutamisest Rohelise Energia osalussüsteemiga liitunud kuues Hiiumaa ettevõttes ning Kärdla linnavalitsuses. Kommenteerivad Toomas Jõõts, Ari Hannula ja Ants Vahtras. Lisa: Rohelise energia ostjad Hiiumaal praegu

  10. Projeto de pesquisa Energia Nuclear

    Directory of Open Access Journals (Sweden)

    Marcelo Henrique Barbosa Fiori

    2011-07-01

    Full Text Available Esse  projeto tem como intuito mostrar como pode se útil a utilização da energia nuclear para o abastecimento elétrico de uma escola. Mostrando que a energia nuclear é sim uma fonte viável de produção de energia “[...] meio quilo de urânio, do tamanho da ponta do meu dedo se você conseguir liberar toda a energia equivale a 5.000 barris de petróleo”.

  11. Eesti Energia unustas Toomas Lumani andmed / Raimo Poom

    Index Scriptorium Estoniae

    Poom, Raimo

    2008-01-01

    Eesti Energia jurist Heili Raudkivi palus rahandusministeeriumilt infot, mis tähtajaks on rahandusminister nimetanud Eesti Energia nõukogu liikmeks Toomas Lumani. Eesti Energia pressiesindaja selgitus

  12. Uusiutuva energia sijoituskohteena

    OpenAIRE

    Silvennoinen, Kiti; Vihonen, Niko

    2013-01-01

    Globaalit tavoitteet ilmastonmuutoksen hillitsemiseksi ovat johtaneet energiamarkkinoiden muutokseen. Perinteisten kivihiilen ja öljyn rinnalle on kehitetty erilaisia uusiutuvia energia-muotoja, joiden tuottaminen aiheuttaa vähemmän ympäristölle haitallisia päästöjä. Kansainväliset sopimukset ja säädökset tukevat energiantuotannon siirtymistä uusituvilla energialähteillä tuotettuun energiaan. Suomi on osaltaan sitoutunut näihin kansainvälisiin sopimuksiin ja lisäksi asettanut itselleen tavoit...

  13. Electric power conservation while using pumping systems; Conservacion de Energia Electrica en Sistemas de Bombeo

    Energy Technology Data Exchange (ETDEWEB)

    Nambiar, P

    2007-01-15

    The pumping systems provide about 20 to 25 percent of energy which is necessary worldwide: it is fruitful to understand how to use electric power efficiently, to achieve the reduction regarding expenses a pumping system implies.It is essential to possess a better knowledge about the pumping system and its applications, in order to be able to use energy responsibly. If people do not how to operate this kind of systems properly, they will use inadequate equipment that will cause an energy waste. In addition it is important to know: alternative methods to meet variable demands, an adapted system to pump water requirements in order to ensure the pump work in its pumping point, and the life cycle system cost for the energy saving in the long term. [Spanish] En promedio del 20 al 25% de la energia necesaria en el mundo proviene de los sistemas de bombeo, por tal razon es importante saber como utilizar la energia electrica con eficiencia para asi lograr reducir los gastos que este tipo de sistemas implican. Para poder hacer un buen uso de la energia, es necesario que se tenga un conocimiento mayor del sistema de bombeo y aplicacion, ya que la ignorancia sobre esto exige el uso de aparatos que contribuyen al desperdicio de la energia; por otro lado tambien es esencial conocer metodos alternos para demandas variables, tener un sistema que se adapte a las necesidades de bombeo del agua para asegurarse de que cada bomba trabaje cerca de su punto de bombeo y finalmente conocer el costo del ciclo de vida del sistema para el ahorro de energia a largo plazo.

  14. Eesti Energia esindused = Eesti Energia branches / Andres Labi, Janno Roos

    Index Scriptorium Estoniae

    Labi, Andres, 1977-

    2013-01-01

    Eesti Energia klienditeeninduse kontorite sisekujundusest. Autorid: Janno Roos, Andres Labi ja Liisa Põime (Ruumilabor). Visuaalne identiteet: Tank.Teenuste disain: Urmas Pastarus. ESLi aastapreemiate žürii esimehe Kaido Kivi ning žürii liikme Raivo Puusepa arvamused

  15. Lahtimuukimata tume energia / Dennis Overbye

    Index Scriptorium Estoniae

    Overbye, Dennis

    2008-01-01

    Salapärase tumeda energia avastamisest on möödas kümme aastat, ent teadmatus, millega on tegu ja kuidas seda üldse teada võiks saada, ajab teadlased endiselt meeleheitele. Lisaks joonis: Laiali kihutavad galaktikad

  16. Eesti Energia tahab elektrit toota Pihkvas / Toivo Tänavsuu

    Index Scriptorium Estoniae

    Tänavsuu, Toivo

    2005-01-01

    Eesti Energia ja Venemaa ettevõte RAO Rossija võivad koos rajada Pihkvasse ühise gaasielektrijaama. Eesti Energia juhatuse liikme Lembit Vali kommentaare. Lisa: Fortum ja Eesti Energia otsivad koostöövõimalusi

  17. Eesti Energia gets lower than hoped for price hike

    Index Scriptorium Estoniae

    2008-01-01

    Konkurentsiamet ja Eesti Energia leppisid kokku elektritariifi tõusu põhimõtetes. Elektri hinna tõus on kolm korda väiksem kui Eesti Energia lootis. Eesti Energia on huvitatud tuumaelektrijaamast

  18. The renewable energy sources market: proposal for its development and implications in the Wholesale Market Administrator; O mercado de energia eletrica de fontes incentivadas: proposta para sua expansao e implicacoes na camara de comercializacao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Januario, Alexandra Cristina Vidal

    2007-07-01

    This work approaches the insertion of the renewable energy sources - SHP, biomass, wind and solar - in the Brazilian power trading environment, more specifically in wholesale market administrator. Although the legislation created the special consumer in 1998, the lack of definition in the renewable energy trading process hindered this market development during years. However, to consider a solution for this implementation, it is important to know the current rules that conduct the power trading, therefore, identifying the possibilities of adjustment. Since this is a current subject, some proposals had been presented by sector agents through the Public Hearing 33/05. In this work, these proposals are also analyzed, so the presented solution considers the advantages and disadvantages of what was discussed by the market agents. Finally, the simulation of the proposed solution indicates its implementation viability and allows a critical analysis of the renewable energy sources market and the trading rules of the wholesale market administrator. (author)

  19. Development of a database for use in electric power utilities in the electric power distribution area; Desenvolvimento de um banco de dados para uso em concessionarias de energia eletrica na area de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Sobral, Marcos Alexandre Barreiros

    1996-07-01

    The electric energy distribution system dimension together with the involved diverging elements. requires a constant updated information system. The dynamics and the reliability of the information implies in the use of modern technology, as well as data updating and control. There is a constant need of improving the utilities information system and its lack may put into risk not only the quality of the services but also consumer satisfaction. Utilities technical systems should therefore follow this need allowing for a quick response needed in order to keep the system under control and consequently to maintain the quality of the services. This work proposes a basic information technology model for technical areas and for an electric utility that can be applied to manage any data bank at any platform. To have it demonstrated, a Visual Basic application was developed applying X base data structure, which shows the use of alpha numerical data with G S (Geographic Information System). (author)

  20. Answers to energy crisis: energy efficiency, rational use of energy and renewable sources; Respostas para crise de energia eletrica: eficiencia energetica, uso racional de energia e fontes renovaveis

    Energy Technology Data Exchange (ETDEWEB)

    Naturesa, Jim Silva; Mariotoni, Carlos Alberto [Universidade Estadual de Campinas (FEC/UNICAMP), SP (Brazil). Fac. de Engenharia Civil, Arquitetura e Urbanismo; Menezes, Taciana de V.; Perrone, Fernando Pinto Dias; Lepetitgaland, Karla Kwiatkowski [Centrais Eletricas Brasileiras S.A (ELETROBRAS), Rio de Janeiro, RJ (Brazil)

    2008-07-01

    This article presents the main advances in energy efficiency of Brazil, the results of the electrical energy alternatives sources incentive program until May of 2007, and examples of using energy in a reasonable way. In our point of view, these three initiatives are essentials in any energetic planning and must be considered with seriousness, mainly at moments of energy crisis. (author)

  1. Combat, prevention and optimization of commercial losses of power energy; Combate, prevencao e otimizacao das perdas comerciais da energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Penin, Carlos Alexandre de Sousa

    2008-07-01

    The objective of this work is to study the problem of NTL using a wide approach, analyze the experience of dealerships in Brazil and abroad, discuss the best practices for mitigation of those losses and propose improvements in the combat and prevention processes, and the legal procedures for recovery of incomes, leaning on a careful regulatory context. This study draws attention to Brazil's socioeconomic diversity, comparing it to various international examples, and intends to identify the most relevant aspects that must be considered on the theme, discussing procedures and methodologies for the equation of the amount of resources to be applied by distributing companies to achieve the appropriate reduction of NTL. (author)

  2. Decenal plan of electric energy expansion - 2006-2015; Plano decenal de expansao de energia eletrica - 2006-2015

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    This report is divided into seven chapters and presents: 1) Introduction - a brief description of the institutional context of the study and the decenal planning role in this context; 2) electric power market - the evolution of market and economy conjuncture of electric power and the basic premises for the market projections, including the considered macroeconomic scenery description; 3) electric power generation - considered premises, methodology and criteria for the formulation and adjustment of generation expansion alternatives of electric power; 4) electric power transmission - main aspects which guided the evolution of the interlinked system reference configuration in the decenal period and a description of the main result of transmission system expansion analysis, consolidated by SIN geoelectric region and by each state of these regions; 5) socioenvironmental analysis - adopted methodology and the results of the socioenvironmental analysis for the foreseen business in the decenal horizon; 6) expansion indicators of the electric system - synthesizes the main indicators referring to the decenal period as far the market evolution, generation expansion and transmission is concerned; 7)bibliographic references.

  3. Expert system in power distribution lines switching; Sistema especialista em manobras de redes de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Cavellucci, Celso

    1989-07-01

    This work proposes an expert system integrated to procedures of numerical computation, denominated RD and projected to suggest alternatives of switching plans in the isolation and re-establishment of power distribution lines. The switching plans are based on the specialist's knowledge (network operator) and in evaluations of the electric conditions of the switching. Specialist's knowledge is represented in the form of triples (context, attribute, value) and production rules, that are evaluated conveniently by the machine of inference of the RD system. The electric power distribution is represented by a graph model, where the knots are load blocks and the arcs are key of the system. The evaluation of the electric requirements (voltage drop and physical capacity of the components of the power distribution lines) it is obtained through a maneuver simulator (numeric computation). The maneuver simulator bases on the Method of the Moments for the calculation of the voltage drop. With base in these ideas a prototype of the RD system was developed.

  4. Commercial electric energy generation in sugar cane industry; Geracao comercial de energia eletrica no setor sucro-alcooleiro

    Energy Technology Data Exchange (ETDEWEB)

    Koblitz, Luiz Otavio Gomes [Koblitz Ltda., Recife, PE (Brazil)

    1988-12-31

    The sugar cane has been cultivated in Brazil since 400 years ago. It is a crop that can be used in extensive way and features the most efficient solar energy conversion process in the world: the photosynthesis. Unfortunately, despite of the elapsed time, only 50% of this solar energy has been effectively used. Now, because the crisis in the electric power production in Brazil today we have possibility to exploit this wasted energy, converting it into electric energy. (author) 1 fig., 3 tabs.

  5. Segmentation of electric energy customers by specific niches; Segmentacao de clientes de energia eletrica por nichos especiais

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Ana Lucia Rodrigues da; Jannuzzi, Gilberto de Martino [Universidade Estadual de Campinas (UNICAMP), SP (Brazil)], E-mail: jannuzzi@fen.unicamp.br

    2009-04-15

    The article presents the classic segmentation used in electric energy industry for large customers. The paper argues the limitations of this classification, as well as, the potentialities to classify customers for specific niches, the example of that already occurs in other competitive sectors of the economy. Twelve potential forms for classifying large customers in electricity industry are presented: geographic localization; value of the invoice; sector of productive activity; types of share holding composition and enterprise management; forms and characteristics of the use of the electric energy in the final units; degree of technological sophistication; client relation cost benefit; common factors in energy process of purchase; brand associated with the customer; extraordinary factors, such as, urgency, application and volume of energy; personal characteristics of the purchaser in charge of the operation; former-customers who moved from the captive market to the free market and vice versa. The article concludes proposing a new methodology to identify the specific niches of customers in the electric sector, as well as the inductive and restrictive factors of this methodology. (author)

  6. Data Warehouse for support to the electric energy commercialization; Data Warehouse para apoio a comercializacao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Lanzotti, Carla R.; Correia, Paulo B. [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Faculdade de Engenharia Mecanica]. E-mails: clanzotti@yahoo.com; pcorreia@fem.unicamp.br

    2006-07-01

    This paper specifies data base using a data warehouse containing the energy market, the electric system, and the economy information allowing the visualization and analysis of the data through tables and dynamic charts. This data warehouse corresponds to the module 'Information base from Platform helping the electric power commercialization'. The platform is a computer program viewing to help the interested agents in commercializing energy and is formed by three modules as follows: Information Base, Contracting Strategies and Contracting Process. It is expected that the use os these data base, joint to Platform establishes positive conditions to agents from the interested in electric energy commercialization.

  7. Technical and economic feasibility of distributed generation of electricity; Viabilidade tecnica e economica de geracao distribuida de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Rabelo, Frederico Augusto Ornelas; Espirito Santo, Marcos Vinicius do; Leite, Leonardo Henrique de Melo; Silva, Arlete Vieira da [Centro Universitario de Belo Horizonte (UnBH), MG (Brazil)], e-mails: fred.aor@hotmail.com, marcos_ves@yahoo.com.br, leonardo.leite@prof.unibh.br, arlete.silva@prof.unibh.br

    2011-07-01

    This article focuses on the technical and economic feasibility of the design and implementation of energy micro nets distributed generation (GD). For this, a study was conducted in a rural area to assess the potential of generating electricity from renewable sources, and this has assisted the Brazilian network of conventional energy. We studied the renewable energy village, considered the conventional system of generation, transmission, distribution of electricity in this region and the technical and economic feasibility of implementing distributed generation and its interconnection to the basic network or not. The methodological procedures were used bibliographic and documentary research, interviews with standardized forms, and Case Study. This study was conducted in Minas Gerais assessing the current conditions of the electrification of the area surveyed and deployment of the types of electricity sources - biomass (biogas and burning eucalyptus), wind, solar photovoltaic. The calculations were made from it with companies and budgets. It is conceived, then, models of generating electricity through renewable sources constitutes a GD. Finally, they estimated the costs of implementation of the models studied in the community where they were cost estimates for electric power production through private investment, considering some possible scenarios to be created, namely: generation for own consumption, generation the sale of surplus and possible expansions. In this way demonstrated the high value of the investments required for the use of renewable sources in electricity generation small, given the current scenario. (author)

  8. Combat, prevention and optimization of commercial losses of power energy; Combate, prevencao e otimizacao das perdas comerciais da energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Penin, Carlos Alexandre de Sousa

    2008-07-01

    The objective of this work is to study the problem of NTL using a wide approach, analyze the experience of dealerships in Brazil and abroad, discuss the best practices for mitigation of those losses and propose improvements in the combat and prevention processes, and the legal procedures for recovery of incomes, leaning on a careful regulatory context. This study draws attention to Brazil's socioeconomic diversity, comparing it to various international examples, and intends to identify the most relevant aspects that must be considered on the theme, discussing procedures and methodologies for the equation of the amount of resources to be applied by distributing companies to achieve the appropriate reduction of NTL. (author)

  9. Generation and export of electric energy by sugar and alcohol plants; Geracao e exportacao de energia eletrica por usinas sucroalcooleiras

    Energy Technology Data Exchange (ETDEWEB)

    Queiroz, Gil Mesquita de Oliveira Rabello; Paschoareli Junior, Dionizio; Faria Junior, Max Jose de Araujo [Universidade Estadual Paulista (DEE/UNESP), Ilha Solteira, SP (Brazil). Dept. de Engenharia Eletrica. Grupo de Pesquisa em Fontes Alternativas e Aproveitamento de Energia Eletrica

    2008-07-01

    This paper presents technical aspects necessary to allow a sugar-cane mill, which promotes cogeneration, to operate as an electrical energy producer. Changes and optimization in the process to produce alcohol and sugar-cane, which results in the increase of electrical energy to export are discussed. A case of a sugarcane mill, working as a thermoelectric power plant is presented. The necessary components to generate energy and to connect the thermoelectric plant to the main transmission system are described. (author)

  10. Electric energy management - basis for a municipal public politics; Gestao da energia eletrica - bases para uma politica publica municipal

    Energy Technology Data Exchange (ETDEWEB)

    Kurahassi, Luiz Fernando

    2006-07-01

    Electricity is an input whose impact on the costs of the municipal public services varies according to the manner it is used and to the way it is obtained from the supplying company. The management of its use results in savings and in greater efficiency and quality of the delivered services - including the public lighting - besides, it softens environmental impacts and develops actions to orientate society towards energy-efficient consumption habits. The public sector has a significant share in the electricity final consumption in Brazil, trending to increase, but a room for consumption reduction and increase in energy efficiency can be seen in the municipalities. The purpose of this thesis is to identify concepts and set parameters that can be the basis of a public policy on electrical power management at the ambit of municipality. This paper reports a series of theoretical studies and empirical researches concerning the efficient use of electrical power in public services in cities of different countries and analyses the results reached from the application of models that successively work in the reality of cities from the Sao Paulo metropolitan area. It concludes that the municipality must play a role much more relevant than being a simple institutional electricity consumer, by proposing the basis for an intervention in the municipal reality. (author)

  11. Hybrid solar-hydraulic electric power supply systems; Sistemas de fornecimento de energia eletrica hibrido solar hidraulico

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Doriana Marinho Novaes; Silva, Selenio Rocha; Alvim Filho, Aymore de Castro [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Centro de Pesquisa e Desenvolvimento em Engenharia Eletrica]. E-mails: doriana@cpdee.ufmg.br; selenios@eee.ufmg.br; aymore@cpdee.ufmg.br; Martinez, Carlos Barreira [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Dept. de Engenharia Hidraulica e Recursos Hidricos]. E-mail: martinez@cce.ufmg.br

    2000-07-01

    This work presents a comparative study among the direct solar energy utilization options ,through solar panels, coupled to the frequency inverter. These system store energy through batteries or through a reversible and hybrid solar/hydraulic system, coupled to a rectifier and a frequency inverter. There are two basic configurations for the systems being the first one composed of solar panels linked to a battery system , delivering electric energy through a three phase inverter. The second one is composed of solar panels connected to a small battery system and to a water reservoir that has the goal of operating as a reversible system during at night, or during load peak periods. In this ,it is presented a methodology for the designing and economic analysis, comparing this hybrid alternative, to the inverter plus batteries options. This methodology to the correct Energy Conversion System,which is economically advantageous due to the availability of the region. At the end, it is presented a 'case study' where viability of use , for the hybrid solar/hydraulic system in an isolated area, is verified. (author)

  12. Electric energy tariffs - critical analysis and methodological proposition; Estrutura de tarifas de energia eletrica. Analise critica e proposicoes metodologicas

    Energy Technology Data Exchange (ETDEWEB)

    Fugimoto, Sergio Kinya

    2010-07-01

    Currently, the electric energy sector is preparing for the third round of the distributors tariff revisions. Since the regulatory environment is more consolidated in terms of required revenue, the agents are turning their attention to the necessary adjustment and correction of the tariff structure. In fact, ANEEL (regulatory agency) set topics for R and D projects considered strategic for the development of national energy sector, among them, the Tariff Structure Project. Recently, the regulatory agency also announced public hearings dealing with the costs allocation, price signals and tariffs for low-voltage consumers. In line with this debate, the thesis finds to analyze the methodology for calculating tariffs, systematizing knowledge dispersed in various references. For this, it discusses the major aspects of peak pricing theory, including American, British and French approaches, and researches the connection between the logic built into the costs allocation by hour and the criteria for electricity distribution system planning. Aiming to reflect the costs of each customer type, indicating a better utilization of the distribution system, are proposed improvements and innovation whose highlights are: shifting the idea that expansion costs should be only allocated in peak time of the system, setting the periods after calculating the costs, changing how to derive the reference charges by average aggregation of the costs and applying the methodology on altered load curves. Finally, this thesis seeks to prove that the current methodology, although designed by the time in which the electricity sector was aggregated, can be adapted according to the proposed improvements and innovations, and thus applied to the current environment in which electric energy businesses and tariffs are separated in generation, transmission, and distribution and retail areas. (author)

  13. Expert system in power distribution lines switching; Sistema especialista em manobras de redes de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Cavellucci, Celso

    1989-07-01

    This work proposes an expert system integrated to procedures of numerical computation, denominated RD and projected to suggest alternatives of switching plans in the isolation and re-establishment of power distribution lines. The switching plans are based on the specialist's knowledge (network operator) and in evaluations of the electric conditions of the switching. Specialist's knowledge is represented in the form of triples (context, attribute, value) and production rules, that are evaluated conveniently by the machine of inference of the RD system. The electric power distribution is represented by a graph model, where the knots are load blocks and the arcs are key of the system. The evaluation of the electric requirements (voltage drop and physical capacity of the components of the power distribution lines) it is obtained through a maneuver simulator (numeric computation). The maneuver simulator bases on the Method of the Moments for the calculation of the voltage drop. With base in these ideas a prototype of the RD system was developed.

  14. Scenarios for wind power in Brazil, Argentina and Chile; Cenarios para a energia eolio eletrica no Brasil, Argentina e Chile

    Energy Technology Data Exchange (ETDEWEB)

    Dedecca, Joao Gorestein; Nogueira, Larissa Goncalves; Jannuzzi, Gilberto de Martino [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Energia], emails: jdedecca@fem.unicamp.br, larissa@fem.unicamp.br, januzzi@fem.unicamp.br; Gomes, Rodolfo Dourado [International Energy Initiative-Latin America (IEI-LA), Campinas, SP (Brazil)], email: rodolfo@iei-la.org

    2010-07-01

    The Chilean, Argentinean and Brazilian power matrixes presented in the last two decades a growth of the non-renewable energy sources share, especially fossil sources, mainly in installed capacity and in a lesser degree in energy production. Greenpeace and the European Renewable Energy Council have elaborated a reference energy scenario together with a scenario analyzing the institution of ample measures for the promotion of renewable energy sources. Feed-in tariffs and auction or bidding mechanisms implemented in Brazil and Argentina and the renewable portfolio standard implemented in Chile allied with the wind industry state in these countries indicate that Chile and Argentina will fulfill the 2020 wind power installed capacity predicted in the reference scenarios, while Brazil will reach the energy revolution scenario prediction. Important energy policy changes are required if the Chile and Argentina energy revolution scenarios wind power installed capacity are to become a reality in 2020. (author)

  15. Energy education; Pedagogia da energia

    Energy Technology Data Exchange (ETDEWEB)

    Muniz, Rafael Ninno, e-mail: rafaelninno@gmail.com

    2006-07-01

    'Pedagogia da Energia' (energy education) is a qualification course that has as intention to unite ambient education with renewable energies through the art-education and of the long-distance education. Collective made up of theoretical and practical activities through group dynamic and works, with intention to integrate and to enable the participants as a whole, aiming to form potentials to agreement and diffusion of energy concepts of the subjects environment - energy - residues. It possess the structure of an actual course with support of long-distance education with a platform of available web education in the Internet, where the participants have access the all content used in the course (texts, presentations and figures), virtual library, colloquy room, thematic list of quarrel and forum, beyond guardianship accompaniment. A structure constructed in classroom for the participants uses as pedagogical tool titled 'Mandala das Energias' where the concepts studied are worked in. The politics characteristics presented are, ambient and social of the use of the power plants and its implications in the daily one of the humanity. It understands the education as a reciprocal process, that understands the intention to teach and to learn in a set of exchanges of necessary information to the curious nature of the human beings. This article explains the structure and methodology of functioning of the course with a summary of the worked chapters. It also presents the pedagogical tool 'Mandala das Energias' and its respective flowchart of energies that originated it in annex at the end of the text. (author)

  16. Energy education; Pedagogia da energia

    Energy Technology Data Exchange (ETDEWEB)

    Muniz, Rafael Ninno, e-mail: rafaelninno@gmail.com

    2006-07-01

    'Pedagogia da Energia' (energy education) is a qualification course that has as intention to unite ambient education with renewable energies through the art-education and of the long-distance education. Collective made up of theoretical and practical activities through group dynamic and works, with intention to integrate and to enable the participants as a whole, aiming to form potentials to agreement and diffusion of energy concepts of the subjects environment - energy - residues. It possess the structure of an actual course with support of long-distance education with a platform of available web education in the Internet, where the participants have access the all content used in the course (texts, presentations and figures), virtual library, colloquy room, thematic list of quarrel and forum, beyond guardianship accompaniment. A structure constructed in classroom for the participants uses as pedagogical tool titled 'Mandala das Energias' where the concepts studied are worked in. The politics characteristics presented are, ambient and social of the use of the power plants and its implications in the daily one of the humanity. It understands the education as a reciprocal process, that understands the intention to teach and to learn in a set of exchanges of necessary information to the curious nature of the human beings. This article explains the structure and methodology of functioning of the course with a summary of the worked chapters. It also presents the pedagogical tool 'Mandala das Energias' and its respective flowchart of energies that originated it in annex at the end of the text. (author)

  17. Energia eólica

    OpenAIRE

    Carneiro, Joaquim A. O.

    2013-01-01

    O vento (massas de ar em movimento) é utilizado há milhares de anos para suprir as necessidades energéticas que decorrem de um vasto conjunto de actividades humanas. Por exemplo, o vento foi muito utilizado para propulsar alguns meios de transporte (barcos a vela), bombear água ou permitir o funcionamento de actividades industriais, como foi o caso dos moinhos de vento que ainda hoje existem em muitas regiões de Portugal. Como a maior parte das fontes de energia renováveis (excepto a ener...

  18. A personal memory of the history of the group of energy and mass transference; Una memoria personal de la historia del grupo de transferencia de energia y masa

    Energy Technology Data Exchange (ETDEWEB)

    Ramos, Eduardo [Centro de Investigacion en Energia (CIE) de la UNAM, Temixco, Morelos (Mexico)

    2010-07-01

    An object that is exposed to sunlight heats up. Based on the everyday experiences, this is a claim that the majority of us would agree. In a more technical note, this object increases its temperature and internal energy. Reflection for a moment, perhaps we would come to the conclusion that the energy captured by the object exposed to solar radiation could be used in a useful fashion. It would require a much longer time of reflection and analysis to imagine the method to convert the heat into useful energy. It is precisely this analysis that has been the objective of the group of energy and mass transference of the Center for Energy Research since its foundation, and probably will remain so while it can be identified as a group of scientific research. In the following pages we will feature briefly, from a personal stand point of view the history of the work, successes and failures of the group since its inception till the present. [Spanish] Un objeto que se expone a la luz solar se calienta. Basados en la experiencia cotidiana, esta es una aseveracion con la que la mayoria de nosotros estaria de acuerdo. Dicho de manera mas tecnica, este objeto aumenta su temperatura y su energia interna. Reflexionando un instante, quiza llegariamos a la conclusion que la energia capturada por el objeto expuesto a la radiacion solar podria ser usada de manera util. Se requeriria un tiempo mucho mas largo de reflexion y analisis para imaginar el metodo para convertir el calor en energia util. Precisamente este analisis ha sido el objetivo del grupo de Transferencia de Energia y Masa del Centro de Investigacion en Energia desde su fundacion, y probablemente lo seguira siendo mientras se le pueda identificar como un grupo de investigacion cientifica. En las paginas siguientes resenaremos brevemente desde un punto de vista personal la historia del trabajo, exitos y fracasos del grupo desde su inicio hasta el presente.

  19. Scienza e conoscenza: sul valore del metodo scientifico

    Directory of Open Access Journals (Sweden)

    Riccardo Luciano Appolloni

    2014-05-01

    Full Text Available L’antico problema di riconoscere una forma di conoscenza oggettivae fondata è ancora vivo; in questo scritto cercheremo di capire se la scienza moderna possa essere una forma di conoscenza tale e, quindi, privilegiata. A tal fine ci serviremo del pensiero di alcuni epistemologi e scienziati. In particolare, nel trattare il problema del valore epistemologico del metodo scientifico, non potremo esimerci dal fare i conti con l’anarchismo metodologico di Paul K. Feyerabend, verso il quale l’esito del presente articolo sarà fondamentalmente critico. A partire dai fecondi spunti di questo filosofo, tenteremo dapprima di analizzare i caratteri distintivi della scienza e del suo metodo rispetto ad altre forme di sapere; quindi, cercheremo di individuare alcuni limiti della conoscenza razionale.

  20. Eesti Energia, vara veel! / Väino Sarnet

    Index Scriptorium Estoniae

    Sarnet, Väino, 1952-

    2010-01-01

    Majanduskonsultant avaldab arvamust, millised on argumendid Eesti Energia kiireks börsiletulekuks, kes sellega võidaksid ja kes kaotaksid ning miks pole praegu õige aeg Eesti Energia aktsiate avalikuks müügiks

  1. Eesti Energia loovutas Estlinki energiabörsile / Kadri Bank

    Index Scriptorium Estoniae

    Bank, Kadri

    2010-01-01

    Eesti Energia otsustas rentida Estlinki merekaabli välja Soome ja Eesti põhivõrkudele, kellel on omakorda kohustus anda see üle vabaturu kasutusse. Eesti Energia finantsdirektori Margus Kaasiku kommentaar

  2. Eesti Energia hakkab Jordaanias varsti ehitama / Alyona Stadnik

    Index Scriptorium Estoniae

    Stadnik, Alyona

    2011-01-01

    Eesti Energia loodab, et Jordaania esimese põlevkivielektrijaama ehitus algab juba 2012. aastal. Majandus- ja kommunikatsiooniminister Juhan Partsi sõnul on Jordaani puhul tegemist Eesti võimalusega, Eesti Energia on Jordaania projekti kaasanud juba rahastajaid

  3. A reverse method to estimate initial temperatures in geothermal reservoirs; Un metodo inverso para estimacion de la temperatura inicial de yacimientos geotermicos

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Gutierrez, Alfonso [Instituto de Investigaciones Electricas, Gerencia de Geotermia, Cuernavaca, Morelos (Mexico)]. E-mail: aggarcia@iie.org.mx; Ramos Alcantara, Jose R. [Centro Nacional de Investigacion y Desarrollo Tecnologico, Departamento de Ingenieria Mecanica, Cuernavaca, Morelos (Mexico); Arellano Gomez, Victor M. [Instituto de Investigaciones Electricas, Gerencia de Geotermia, Cuernavaca, Morelos (Mexico)

    2010-01-15

    perdidas de circulacion, modelados a partir de balances macroscopicos de momentum y energia. Los procesos de transporte en la formacion consideran al yacimiento como un medio poroso isotropico y el flujo de fluidos es descrito mediante la Ley de Darcy. Con este modelo se genera el campo de temperaturas, presiones y velocidades como funcion del tiempo y del espacio. El metodo se probo usando datos del pozo LV-3 del campo geotermico de Las Tres Virgenes, Baja California Sur, Mexico. Las temperaturas estimadas de la formacion no perturbada o iniciales se comparan dentro de {+-}15 grados centigrados con las temperaturas medidas, lo cual es un resultado aceptable desde el punto de vista ingenieril.

  4. Some thoughts for 'Energia Nucleara'

    International Nuclear Information System (INIS)

    Harris, David S.

    2002-01-01

    This is a report of an interview between the 'Energia Nucleara' reporter and Mr David S. Harris, the AECL project director for Cernavoda NPP Unit 2. The following items were addressed during the interview: the status of the Cernavoda NPP Unit 2 project; the differences in the project between Unit 1 and Unit 2; the Romanian infrastructure and industrial contributions to the Unit 2 project; the cooperation with Romanian design team; the Canadian authorities support to Unit 2 completion; Unit 3 project and AECL possible involvement. Following the Romanian Government's decision to complete Cernavoda Unit 2 in late 2002 work was recommenced in the key areas of engineering, procurement of equipment and materials signing of major supply contracts and construction, such that the total project is now 52% complete. actual construction activities are now 41% complete, and the number of key milestones have recently been achieved, such as: Closure of the Reactor Building 'B' Opening; commencement of rolling in of 45,000 main turbine condenser tubes; commencement of post-tensioning works on the Reactor Building structure and the completion of various infrastructure civil works. Structures and equipment already delivered, and installed or stored are in good conditions and ready for construction continuation. The following changes were implemented in Unit 2 as compared to Unit 1: design changes to meet new regulations and provide increases in the margin of safety; changes due to development of nuclear technology, particularly those improving performance and reliability of operation; design changes to replace equipment affected by obsolescence to allow purchasing of spare parts in the future. Concerning the future, AECL is willing to cooperate with the Romanian SNN on the Unit 3 completion process

  5. The Comparative Accuracy of the 4 {pi} Liquid Scintillation Counting Method of Radioisotope Standardization; L'exactitude comparee de la methode de comptage 4 {pi} a scintillateurs liquides pour l'etalonnage des radioisotopes; Sravnitel'naya tochnost' 4 {pi} zhidkogo stsintillatsionnogo metoda podscheta standartiziruemykh radioizotopov; Exactitud del metodo de recuento con centelleador liquido 4 {pi} para normalizar radioisotopos, comparada con la de otros metodos

    Energy Technology Data Exchange (ETDEWEB)

    Steyn, J [National Physical Research Laboratory, Pretoria (South Africa)

    1960-06-15

    The accuracy of the 4 {pi} liquid scintillation counting method of standardizing {beta} emitters was compared to 4 l{pi} {beta}-{gamma} coincidence counting for the nuclides Co{sup 60}, I{sup 131} and Au{sup 198}. For P{sup 32} the liquid counting results were compared to 4 {pi} proportional counting. The efficiency of the liquid scintillation counting method was found to be energy dependent, dropping to about 97.5% for Co{sup 60} which was the lowest energy {beta} emitter investigated. (author) [French] La precision de la methode de comptage 4 {pi} a scintillateurs liquides pour l'etalonnage des emetteurs {beta} a ete comparee au comptage par coincidences 4 {pi} {beta}-{gamma} pour le So{sup 60}, le I{sup 131} et le Au{sup 198}. Dans le cas du P{sup 32}, les resultats du comptage au liquide ont ete compares a ceux du comptage 4 {pi} proportionnel. On a constate que le rendement de la methode de comptage a scintillateurs liquides variait en fonction de l'energie emise et qu'il descendait a environ 97.5% pour le Co{sup 60} qui, de tous les emetteurs {beta} etudies, emet l'energie la plus faible. (author) [Spanish] El autor compara la precision del metodo de recuento con centelleador iquido 4 {pi} para normalizar emisores {beta} con la del metodo de coincidencias {beta}-{gamma} 4 {pi}, para los siguientes nuclidos: So{sup 60}, I{sup 131} y Au{sup 198}. En el caso del P{sup 32}, confronta los resultados del primer metodo con los obtenidos mediante el recuento proporcional 4 {pi}. Comprueba que la eficacia del metodo de recuento con centelleador liquido depende de la energia y desciende al 97.5%, aproximadamente, para el Co{sup 60}, que fue el emisor {beta} mas debil que se investigo. (author) [Russian] Tochnost' 4 {pi} zhidkogo stsintillyatsionnog o metoda podscheta standartiziruemogo {beta}-izluchatelya sravnivalas' s 4 {pi} {beta}-{gamma} metodom podscheta na sovpadeniyakh dlya izotopov So{sup 60}, I{sup 131} i Au{sup 198}. Dlya R{sup 32} rezultaty zhidkogo

  6. Intelligent use of the energy; Uso inteligente de la energia

    Energy Technology Data Exchange (ETDEWEB)

    Dominguez Ahedo, Carlos [Director General de la Comision Nacional para el Ahorro de Energia (CONAE), Mexico D. F. (Mexico)

    2005-07-01

    Comision Nacional para el Ahorro de Energia (CONAE) is an administrative agency independent of the Secretaria de Energia that serves as a technical agency for consultancy in matters of efficient use of energy and advantageous use of renewable energies. This document searches to inform the population how to satisfy the necessity of energy in an intelligent way. For this purpose some useful actions to be performed were detected: the making of a balance between the supply and the energy demand, the consultancy on how the saving of energy is performed in order to reduce its waste, to count on equipment and efficient systems, to use domestic renewable energies and to use the solar energy and the biomass. [Spanish] La Comision Nacional para el Ahorro de Energia (CONAE) es el organo administrativo desconcentrado de la Secretaria de Energia que funge como organismo tecnico de consulta en materia de ahorro y uso eficiente de energia y aprovechamiento de energias renovables. Este documento busca informar a la poblacion acerca de como satisfacer la necesidad de energia a cambio de su utilizacion de manera inteligente, para ello se detectaron areas de oportunidad como: un balance entre la oferta y la demanda energetica, informar a la gente sobre como se efectua el ahorro de energia para con ello reducir el desperdicio de esta, contar con equipos y sistemas eficientes, usar energias renovables domesticas y utilizar la energia solar y la biomasa.

  7. Sizing an isolated wind-solar-fuel cell generation system based on the particle swarm optimization method; Dimensionamiento de un sistema de generacion aislado eolico-solar-celda de combustible basado en el metodo de optimizacion de enjambre de particulas

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez-Huerta, V; Ramirez-Arredondo, Juan M. [Universidad de Quintana Roo, Chetumal, Quintana Roo (Mexico)]. E-mail: vsanchez@gdl.cinvestav.mx; Arriaga-Hurtado, L. G. [CIDETEQ, Queretaro (Mexico)

    2009-09-15

    Sizing an electric energy system requires an analysis of investment, maintenance and operating costs. In the case of a generation system that uses renewable sources, optimal capacity becomes more complex compared to a conventional system, because of the randomness of renewable resources (wind, solar) and the still high costs of wind and photovoltage generator modules. This work presents the optimal sizing of a wind-solar-fuel cell generation system, minimizing the costs of the system while satisfying the energy demands of an isolated charge. The optimization method used is based on an evolutionary programming technique known as particle swarms (PSO-particle swarm optimization). The generation of energy with a hybrid system is discussed, based on the profile of insolation and wind availability at the site, with the objective of satisfying a specific electric demand. [Spanish] El dimensionamiento de un sistema de generacion de energia electrica requiere un analisis de los costos de inversion, mantenimiento y operacion. En el caso de un sistema de generacion que utiliza fuentes renovables la capacidad optima resulta mas compleja con respecto a un sistema convencional, debido a la aleatoriedad de los recursos renovables (eolico, solar), y a los aun altos costos de generadores eolicos y modulos fotovoltaicos. En este trabajo se presenta el dimensionamiento optimo de un sistema de generacion eolico-solar-celda de combustible minimizando los costos del sistema que satisfaga la energia demandada por una carga aislada. El metodo de optimizacion utilizado esta basado en una tecnica de programacion evolutiva conocida como enjambre de particulas (PSO por sus siglas en ingles: particle swarm optimization). Se plantea la generacion de energia del sistema hibrido con base a la insolacion y el perfil del viento disponible en sitio, con objeto de satisfacer una demanda electrica determinada.

  8. System for electric power generation with photovoltaic solar modules for charging the batteries of an electric wheelchair; Sistema de geracao de energia eletrica com modulos solares fotovoltaicos para o carregamento de baterias de uma cadeira de rodas eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Mesquita, Rafael Pimenta; Souza, Teofilo Miguel de [Universidade Estadual Paulista (UNESP), Guaratinguta, SP (Brazil). Fac. de Engenharia. Dept. de Engenharia Eletrica], Emails: pimentamesquita@gmail.com, teofilo@feg.unesp.br

    2006-07-01

    Renewable energy is all kind of energy produced from a natural source that not diminish because its utilization is 'renewable'. More and more renewable energy resources are used, because they offer multiple advantages such as the energy output facility in small scale and because they are entirely compatible with the environment. The renewable energy used in this project is the photovoltaic solar energy, obtained by the direct conversion of the solar energy in electric energy through the use of solar cells, that can be of several kinds, being the most common of silicon. The main advantage of photovoltaic system is the generation of clean electric energy, or either, generates energy without emitting pollutant and without destroying the environment, moreover is an inexhaustible source of energy. The main disadvantage is, nowadays, the high cost and its low efficiency, so to continue developing it is necessary establish capable mechanisms to make it possible. The search of these mechanisms of incentive becomes-itself a lot important, because the renewable energy and not conventional do not produce a financial return to the investor properly said, but brings lots of benefits to the community, the society and to the environment. This project has the purpose of create an electric energy generation system through solar photovoltaic modules to carry batteries of a motorized wheelchair. An electric wheelchair is moved by electric motors of direct current that are feed by batteries, permitting a medium autonomy of 10 km by load. The batteries are recharged by a battery supplier. This operation should be carried out daily in a space of 6 to 8 hours. According to the Demographic Census realized in 2000 carried out by the IBGE, Brazil has around 1.416.060 physical deficient, which 861.196 are men and 554.864 are women. From a request of a user of electric wheelchair the idea of this project was shown up. The user complained that he stayed a long time carrying his seat and had short time to use it. The goal of this project is analyze the reliability, the efficiency and the costs to implement this system. The main purpose is the increase of the autonomy, the saving of electric energy and to give more freedom to the user. Renewable energy is all kind of energy produced from a natural source that not diminish because its utilization is 'renewable'. More and more renewable energy resources are used, because they offer multiple advantages such as the energy output facility in small scale and because they are entirely compatible with the environment. (author)

  9. Electric generation situation through hybrid systems in Para state and perspectives in face of the global supply of electric power; Situacao da geracao eletrica atraves de sistemas hibridos no estado do Para e perspectivas frente a universalizacao da energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, Claudomiro Fabio de Oliveira; Pinho, Joao Tavares; Pereira, Edinaldo Jose da Silva; Galhardo, Marcos Andre Barros; Vale, Silvio Bispo do; Maranhao, Wilson Monteiro de Albuquerque [Universidade Federal do Para (UFPA), Belem, PA (Brazil). Grupo de Estudos e Desenvolvimento de Alternativas Energeticas], e-mail: gedae@ufpa.br

    2004-07-01

    This work presents an analysis of the hybrid systems for electricity generation installed in the State of Para, emphasizing the profile of the supplied localities, the conversion technologies in the several configurations used for electric power generation, the social, economic and environmental impacts caused by such systems, the management and sustainability of the systems, and their perspectives in face of the global supply of electric power in Brazil. (author)

  10. Energy. Chapter 4; Energia. Capitulo 4

    Energy Technology Data Exchange (ETDEWEB)

    Martin del Castillo, Carlos [Universidad Nacional Autonoma de Mexico, Mexico, D.F. (Mexico)

    2009-07-01

    This chapter stands out that the infrastructure for the electric energy generation, as well as the one departing from fossil fuels has been the responsibility of two institutions with great solvency in the scope of engineering: the Comision Federal de Electricidad (CFE) and Petroleos Mexicanos (PEMEX). It is presented here the energy future in a sustainable context; a prospective study to year 2050; a strategic proposal of Petroleos Mexicanos; the forecast of the oil industry in Mexico and a technological prospective of the energy. [Spanish] En este capitulo se destaca que la infraestructura para la generacion de energia, tanto electrica como a partir de combustibles fisiles ha corrido a cargo de dos instituciones con gran solvencia en el ambito de la ingenieria: la Comision Federal de Electricidad (CFE) y Petroleos Mexicanos (Pemex). Se presenta el futuro de la energia en un contexto sustentable; un estudio prospectivo al ano 2050; una propuesta estrategica de Petroleos Mexicanos; la prospectiva de la industria petrolera en Mexico y; una prospectiva tecnologica de la energia.

  11. Avaliação dos métodos de Grant, Vora & Weeks e dos mínimos quadrados na determinação do valor incremental do mercado de carbono nos projetos de geração de energia elétrica no Brasil

    Directory of Open Access Journals (Sweden)

    Fabio Rodrigo Siqueira Batista

    2011-04-01

    Full Text Available Este trabalho tem por objetivo avaliar a robustez dos métodos de Grant, Vora & Weeks e dos Mínimos Quadrados quando aplicados na avaliação de projetos de geração de energia eletrica a partir de fontes renovavéis desenvolvidos no ambito do Mecanismo de Desenvolvimento Limpo do Protocolo de Quioto. Em primeiro lugar, a metodologia proposta consiste em utilizar o modelo NEWAVE para estabelecer cenários hidrológicos de despacho para as usinas conectadas ao sistema interligado nacional. Em seguida, baseado no escopo da metodologia ACM0002, considera-se a incerteza associada a evolução temporal da linha de base do projeto. Finalmente, o valor incremental do mercado de carbono e estimado utilizando-se a Teoria das Opções Reais. Para tanto os métodos numericos citados anteriormente são utilizados sob a premissa de que o preço do crédito de carbono se comporta de forma aleatoria segundo as premissas de um Movimento Geometrico Browniano

  12. Härra Eesti Energia lahkus haruldase kaevurikirkaga / Andrus Karnau

    Index Scriptorium Estoniae

    Karnau, Andrus

    2005-01-01

    30. novembril oli Eesti Energia juhi kohalt lahkuval Gunnar Okil viimane tööpäev, kuigi Eesti Energia juhatus pakkus Gunnar Okile korralise lepingu lõppemise järel aastast lepingut, keeldus juhatuse esimees selle sõlmimisest. Lisa: Oki-ajastu

  13. Parts harvendas ootamatult Eesti Energia nõukogu / Andres Eilart

    Index Scriptorium Estoniae

    Eilart, Andres

    2011-01-01

    Majandus- ja kommunikatsiooniminister Juhan Parts otsustas 1. juulil päevapealt Eesti Energia nõukogu liikme kohalt tagasi kutsuda Aivar Reiviku ning Rein Kuusmiku, kes olid vastu Eesti Energia üle viie miljoni euro suurusele investeeringule Weroli rapsiõlitehase juurde rajatavasse elektri- ja küttejaama. Uuteks nõukogu liikmeteks said Andres Saame ja Toomas Tauts

  14. Eesti Energia pakuks börsil boonusaktsiaid / Agnes Ojala

    Index Scriptorium Estoniae

    Ojala, Agnes

    2010-01-01

    Majandus- ja kommunikatsiooniministeerium valmistub Eesti Energia aktsia avalikuks pakkumiseks. Riik soovib, et aktsionäride hulgas oleks rohkelt tavakodanikke, aktsiate ostmise motiveerimiseks lubatakse, et aasta pärast kingitakse lisaaktsiaid. Rahandusministeerium peab otsima alternatiive, kuidas Eesti Energia saaks lisaraha börsile minemata

  15. LE «SOTTIGLIEZZE DI CERTA DIDATTICA SUPERLATIVA» DELLA GRAMMATICA ELEMENTARE: STORIA (ATTESTATA DEL METODO RAFFORZISTA (1814-1914

    Directory of Open Access Journals (Sweden)

    Michela Dota

    2018-03-01

    Full Text Available Il contributo ripercorre la storia e le peculiarità del metodo rafforzista, metodo glottodidattico per l’insegnamento della lettura e della scrittura. Il metodo, nato in Italia nel primo Ottocento, nell’epoca postunitaria era praticato nelle scuole elementari soprattutto dell’Italia meridionale, nonché nelle scuole reggimentali e in alcuni istituti per sordomuti. Le sue fondamenta, aberranti rispetto alla norma ortografica e ortoepica tradizionale, lo resero obiettivo di un tenace ostracismo da parte del Ministero dell’Istruzione pubblica, sostenuto per questa occasione da due tra i più eminenti glottologi dell’epoca: Graziadio Isaia Ascoli e Francesco Lorenzo Pullè. Il metodo finì per estinguersi nel secondo decennio del Novecento.   The history of the “metodo rafforzista” for teaching Italian (1814-1914 This article retraces the history and peculiarities of the “metodo rafforzista”, a language teaching method developed in Italy during the first part of 1800s. In the post-Unitarian period, it was used in elementary schools, especially in Southern Italy, and also in military schools and in some institutes for the Deaf and Dumb. Orthographic and orthoepic models proposed by the “metodo rafforzista” diverged from rules of traditional Italian grammar. The method, supported by Graziadio Isaia Ascoli and Francesco Lorenzo Pullè, two of the most distinguished Italian linguists at that time, was subsequently rejected by the Ministry of Public Education, and it vanished during the second half of 1900s.

  16. Evaluation of aircraft crash at Laboratorio de Geracao Nucleo-Eletrica (LABGENE) located at Centro Experimental ARAMAR

    Energy Technology Data Exchange (ETDEWEB)

    Hirata, Daniel M.; Ramos, Monique M.B., E-mail: daniel.hirata@ctmsp.mar.mil.br, E-mail: monique@ctmsp.mar.mil.br [Centro Tecnologico da Marinha em Sao Paulo (CTMSP), SP (Brazil)

    2013-07-01

    One of the human-induced external hazards to be considered in a Level 1 Probabilistic Safety Assessment for a nuclear plant is the aircraft crash, so it's necessary to have the estimative of the frequency of this hazard. In this paper is obtained the annual frequency of aircraft crash at the Laboratorio de Geracao Nucleo-Eletrica (LABGENE) located at the Centro Experimental ARAMAR (CEA).The calculation of this frequency was based on the method recommended in the Standard Review Plan Section 3.5.1.6 considering the airports, training camps and airways located in CEA's region. The estimated value for the aircraft crash frequency obtained is in accordance with the acceptance criteria established in the Standard Review plan Section 3.5.1.6. (author)

  17. Evaluation of aircraft crash at Laboratorio de Geracao Nucleo-Eletrica (LABGENE) located at Centro Experimental ARAMAR

    International Nuclear Information System (INIS)

    Hirata, Daniel M.; Ramos, Monique M.B.

    2013-01-01

    One of the human-induced external hazards to be considered in a Level 1 Probabilistic Safety Assessment for a nuclear plant is the aircraft crash, so it's necessary to have the estimative of the frequency of this hazard. In this paper is obtained the annual frequency of aircraft crash at the Laboratorio de Geracao Nucleo-Eletrica (LABGENE) located at the Centro Experimental ARAMAR (CEA).The calculation of this frequency was based on the method recommended in the Standard Review Plan Section 3.5.1.6 considering the airports, training camps and airways located in CEA's region. The estimated value for the aircraft crash frequency obtained is in accordance with the acceptance criteria established in the Standard Review plan Section 3.5.1.6. (author)

  18. 77 FR 74472 - Application to Export Electric Energy; Energia Renovable S.C., LLC

    Science.gov (United States)

    2012-12-14

    ... DEPARTMENT OF ENERGY [OE Docket No. EA-387] Application to Export Electric Energy; Energia... application. SUMMARY: Energia Renovable S.C., LLC (Energia Renovable) has applied for authority to transmit...)). On September 11, 2012, DOE received an application from Energia Renovable for authority to transmit...

  19. Feasibility of electric energy cogeneration with biogas from dairy cattle; Viabilidade da cogeracao de energia eletrica com biogas da bovinocultura de leite

    Energy Technology Data Exchange (ETDEWEB)

    Coldebella, Anderson; Souza, Samuel Nelson Melegari de [Universidade Estadual do Oeste do Parana (UNIOESTE), Cascavel, PR (Brazil). Curso de Mestrado em Engenharia Agricola], e-mails: andersonpesca@yahoo.com.br, ssouza@unioeste.br; Souza, Juliano de; Koheler, Ana Carolina [Universidade Estadual do Oeste do Parana (UNIOESTE), Cascavel, PR (Brazil)

    2006-07-01

    The technological conquests related to the evolution of the agricultural sector are dependent on some form of energy, among them, we can emphasize the electrical power, which has a high cost, and the derivates from petroleum, which are depleting with the years, generating price oscillation, insecurity about the further supplying, besides being highly polluters. Brazil already presents a tradition in the use of renovating sources of energy, emphasizing the electrical power, which is responsible for more than 80% of all electricity consumed in the country, followed by ethanol, a derivative from sugar cane that can be used pure or mixed with gasoline (derivative from petroleum) to substitute it. Although we have this tradition and we are already using some renovating sources of energy, we still have other sources with potential that are little exploited such as the solar energy, eolic energy and the biomass. Due it's a tropical country, Brazil shows a huge potential to the production of vegetal biomass, besides of produce industrial residues and residues generated by the agro-industrial activity. The western region is emphasized by the production generated by the agro industries, but, with the increasing of the demand and consequently the increasing of the production, the generation of manure, from bovines, pork, chicken or any other kind of animal is becoming a serious environmental problem. Those residues are important raw materials to the production of biogas, a fuel similar to the natural gas that can be converted in electrical, thermal or mechanical power inside the facility, reducing the costs of production. The efficiency of the co-generation systems varies according the composition of the biogas and the equipment used to the conversion, being possible reach 38%, that is equivalent to 2,0 to 2,5 kWh by m{sup 3} of biogas. This work has as objective evaluate the feasibility of the production of electrical power from the biogas generated by residues of the milk bovine culture, using an engine of internal combustion converted to biogas and linked to an electrical generator. (author)

  20. Planning under uncertainties paradigm - application to electric power distribution systems planning; Paradigma de planejamento sob incertezas - aplicacao ao planejamento dos sistemas de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Bianchi Junior, Alberto

    1996-12-31

    In this work it is presented an original methodology of multistage planning, with conflictive objectives and restrictions, incorporating the concept of uncertainties. To do so, the proposed paradigm is based on the Dynamic Programming which comprehends the multistage subject to conflictive restrictions; on the Fuzzy Sets Theory, through the decisions and fuzzy numbers, which model the uncertainties and ambiguous decisions referent to qualitative variables; and on the consideration of evolutional rules associated to network flow algorithm. In its conceptual elaboration, the paradigm is developed in a very ample way, of generalized application to a well defined class of planning problems Particularly, the model fits in the flexible planning, which has been very discussed in the recent literature. Flexible planning must be understood as the one which allows to the planner, under well-defined limits, the evaluation of the planning policy composed by strips of options (discreet or continuous), associated to uncertainty levels related to the real world. In order to validate and consolidate the theoretic concepts, it was elaborated an algorithm turned to the aggregated planning of the distribution of electric energy, that presents intrinsic characteristics which are perfectly fitted in the paradigm`s applicability. (author) 41 refs., 26 figs., 36 tabs.

  1. Evaluate electric field strengths in the vicinity of electric transmission systems of electric power; Avaliar intensidades de campo eletrico nas vizinhancas de sistemas de transmissao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, J.F.; Ulson, J.A.C.; Creppe, R.C.; Serni, P.J.A. [Universidade Estadual Paulista Julio de Mesquita Filho (FEB/UNESP), Bauru, SP (Brazil). Fac. de Engenharia. Dept. de Engenharia Eletrica], Emails: jfranc@feb.unesp.br, ulson@feb.unesp.br, creppe@feb.unesp.br, paulojas@feb.unesp.br

    2009-07-01

    The main purpose in this paper is to describe a methodology for the calculation of the profile of the electric field in the level soil and proximities originated by electric energy transmission systems real and in operation in the country. It is also commented the equation used and your computational implementation in order to agile and to optimize the studies. The results of simulations were just presented for the transmission system in the voltage class 500 kV for to simplify the understanding and space restriction in the article, although five others types of configurations have also been used in the complete study with very voltages and respective classes. The results were animating and very nearby of values well-known of electric field of other and publications traditional in the area. The graphic exits of software for better visual comprehension and understanding went in accomplished in the plan (2D) and in the space (3D). (author)

  2. The evolution of legal aspects on the Brazilian electric power sector, a critical analysis; Evolucao dos marcos regulatorios do mercado de energia eletrica no Brasil, uma analise critica

    Energy Technology Data Exchange (ETDEWEB)

    Bastos, Adriano Silva

    2007-07-01

    The electric sector went through deep changes along these 125 years of electrification of the country, mainly the alternation of their investment bases, hour being private for the most part, state hour. The legal bases of concession and regulation also varied in this period, trying to adapt to the effective model of the time. This work intends to analyze the evolution of the regulatory models of the electric sector, identifying the main changes of paradigms and to compare the efficiency of the models already implanted in the segment, with views to the increment of the offer of energy in the period, molding a critical profile of the best model already adopted in the national electric sector. To compare qualitatively these models requests an analysis of the investment bases a priori in the sector, identifying the contribution of resources has been private or state, following by the government's legal positioning in the sense of being only regulator, or regulator and investor, concluding with an analysis of the electric power offer in the period and the power of self-financing of the companies, in order to assent that the mixed model is the most appropriate model for the sustainable growth of the electric power generation sector in Brazil. (author)

  3. Sulfide gas effects on the power transmission lines; Efeito do gas sulfidrico nos componentes do sistema de transmissao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Kajimoto, Zehbour Panossian; Almeida, Neusvaldo Lira de

    1992-12-31

    Copper and its alloys when exposed in atmosphere contaminated with sulphur compounds present stains due to sulfidation. This sulfidation is markedly influenced by temperature and air relative humidity. In this works, results from tests with three years of exposition in atmospheres containing H{sub 2}S and SO{sub 2} are related; such results show that the use of these materials in regions with these contaminants must be done with restriction. Besides the high copper corrosion rates, corrosion products which form on this metal can cause serious problems to the electric contact. (author) 8 refs., 4 figs., 4 tabs.

  4. Procedures for processing power using agricultural waste to Brazil; Processos de transformacao em energia eletrica utilizando residuos agricolas para o Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Marcelo Jose da; Souza, Samuel Nelson Melegari de; Santos, Reginaldo Ferreira; Wolff, Paulo Sergio [Universidade do Oeste Paulista (CCET/UNIOESTE), Cascavel, PR (Brazil)], E-mail: ssouza@unioeste.br

    2009-07-01

    The suitable process for waste vegetable processing is the thermochemistry because of the low moisture promotes the convert ion process. The use of gasified gas generated by an agricultural waste can reduce the consumption of diesel by up to 80% in internal combustion engines. Cogeneration is suitable for the use of crop residues of sugar cane by the mills, generating heat, mechanical and electrical energy. The use of agricultural waste to energy end is an interesting alternative, since it does not compete with food production. Based on calculations for the processing of the cane remains in electric power it was estimated that the generation is 2301.3 million GJ/year by cogeneration. (author)

  5. The access and use of electrical energy in precarious urban settlements: a global vision; O Uso e acesso de energia eletrica em assentamentos urbanos precarios: uma visao mundial

    Energy Technology Data Exchange (ETDEWEB)

    Fournier, Anna Carolina Pires; Penteado, Claudio Luis de Camargo [Universidade Federal do ABC (CECS/UFABC), Santo Andre, SP (Brazil). Centro de Engenharia, Modelagem e Ciencias Sociais Aplicadas

    2010-07-01

    Energy is considered a basic resource for the integration of human development. However, two billion people worldwide don't have access to the supply of modern forms of energy and, of this total 1.7 billion people live without electricity. This fact occurs in large cities, especially in urban slums (favelas). Through literature review, the aim of this paper was to collect and analyze the use and access to electricity in urban slums of Brazil and the world. As main results we highlight the fact that, even endowed with different characteristics, the countries had similar problems, such as the high number of illegal connections, the use of energy inefficient and the difficulty of payment of electricity rates. The basic insertion technique of electricity is not given as the only solution for the development of these populations and also does not solve social exclusion and energy poverty. (author)

  6. A new computer system for security analysis in power systems; Um novo sistema computacional para analise de seguranca em sistemas de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Jose Vicente Canto dos; Gerhardt, Raul A.; Costa, Iverson F. [Universidade do Vale do Rio dos Sinos (PIPCA/UNISINOS), Sao Leopoldo, RS (Brazil). Programa de Pos-Graduacao em Computacao Aplicada], E-mail: jvcanto@unisinos.br

    2009-07-01

    In the electrical energy systems area, the problem of security analysis have been intensively studied in the last years. The main objective of this work has been the developing of a new computational system for static security analysis. Moreover, the considered system incorporates elements that they look to increase its adequacy to the real use in electrical utilities. The ample literature review achieved by the authors has showed that no analogous proposal was found. To validate the proposed system, the results of tests made on several power systems were described, including a real life Brazilian system of large dimensions. (author)

  7. Planning and administration of human resources in Brazilian Electric Power Companies; Planejamento e administracao de recursos humanos nas empresas brasileiras do setor de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Devanir Vieira

    1985-12-01

    Administration and planning of human resources in Brazilian Companies of Electric Power Sector analyzes the evolution of the concept of business planning. This work explore the specific literature of this theme, giving emphasis in predict methods and human resources development and planning models. Is also presented a case study, realized in 1979, which comprehended 84 % of Brazilian Energy Companies. This study aims to evaluate the results of an implementation of this planning and development models 64 refs., 12 figs., 22 tabs.

  8. The evolution of legal aspects on the Brazilian electric power sector, a critical analysis; Evolucao dos marcos regulatorios do mercado de energia eletrica no Brasil, uma analise critica

    Energy Technology Data Exchange (ETDEWEB)

    Bastos, Adriano Silva

    2007-07-01

    The electric sector went through deep changes along these 125 years of electrification of the country, mainly the alternation of their investment bases, hour being private for the most part, state hour. The legal bases of concession and regulation also varied in this period, trying to adapt to the effective model of the time. This work intends to analyze the evolution of the regulatory models of the electric sector, identifying the main changes of paradigms and to compare the efficiency of the models already implanted in the segment, with views to the increment of the offer of energy in the period, molding a critical profile of the best model already adopted in the national electric sector. To compare qualitatively these models requests an analysis of the investment bases a priori in the sector, identifying the contribution of resources has been private or state, following by the government's legal positioning in the sense of being only regulator, or regulator and investor, concluding with an analysis of the electric power offer in the period and the power of self-financing of the companies, in order to assent that the mixed model is the most appropriate model for the sustainable growth of the electric power generation sector in Brazil. (author)

  9. Strategies adopted by the sugarcane sector in the generation of surplus electricity; Estrategias adotadas pelo setor sucroalcooleiro na geracao de excedentes de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Zilmar Jose de [Universidade Federal de Sao Carlos (UFSCar), SP (Brazil); Azevedo, Paulo Furquim de [Fundacao Getulio Vargas (FGV-SP), Sao Paulo, SP (Brazil)

    2004-07-01

    Considering the necessity to expand the installed national capacity of generation, as well as, to diversify it, the article investigated definitive aspects of the Institutional Environment where the electric energy commercialization by the sugarcane sector is inserted. Positive points in proposal of governmental energy policy for incentive this activity had been observed, as well as, the necessity of its improvement. (author)

  10. Prediction of electric power consumption in the Petrolina city, PE-Brazil; Previsao de consumo de energia eletrica na cidade de Petrolina - PE

    Energy Technology Data Exchange (ETDEWEB)

    Caldas, Alexandre Alex Silva e; Santos, Eucymara Franca Nunes [Universidade Federal do Vale do Sao Francisco (UNIVASF), Juazeiro, BA (Brazil)

    2010-07-01

    This article presents mathematical equations as a way to forecast electricity consumption using the statistical method of multiple linear regression. The equations are presented using the model of least squares method for determining the regression coefficients, and respecting the division of industrial and residential customer classes in the city of Petrolina (PE). This article has the objective of providing companies and individuals who work in the areas of generation, transmission and distribution of electricity in the region a forecasting tool that ensures a reliable level projections of energy consumption, ensuring the necessary supply of energy, aiming to avoid situations such as occurred in Brazil in mid 2000 and 2001 from energy rationing. Then the paper has a significant relevance because there are not many works in this area of knowledge that address the interests of the region. At the end we present reliable methods derived from multiple linear regression equations, which guarantee a correct forecast of electricity consumption (author)

  11. Transformation of the electric power supply chain in competitive markets; Transformacoes da cadeia de suprimentos de energia eletrica em mercados competitivos

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, Paulo Sergio Franco [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia Civil]. E-mail: franco@fec.unicamp.br; Leal, Lydiane Abdon [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia Mecanica. Dept. de Energia]. E-mail: lyable@bol.com.br

    2002-07-01

    This work presents an analysis of the transformation occurred in the electric power supply chain arising out from the privatization of the electric power sector in Brazil. The analysis includes change aspects concerning to the flux of electric power, information, financial and risk fluxes following the productive and commercialization chain. The work also analyses the british experience for identification of efficiency losses and gains in the management of some pos privatization processes, highlighting companies which experienced evolution in the corporative strategies, obtained from the large period of commercial operation not submitted to non regulated environment.

  12. Analysis of the electrical bills of residential consumers: tax and economic aspects; Analise da fatura de energia eletrica de consumidores residenciais: aspectos economicos e tributarios

    Energy Technology Data Exchange (ETDEWEB)

    Reis, Lindemberg Nunes; Pinto, Danilo Pereira [Universidade Federal de Juiz de Fora, MG (Brazil). Fac. de Engenharia], e-mail: lnunesreis@yahoo.com.br, e-mail: danilo.pinto@ufjf.edu.br

    2008-07-01

    Residential consumers represent a significant part of the market of electric energy and are increasing by deriving tributes of the tariff of energy. These consumers are uninformed about the abuses that happen to them. This work has as objective to analyze and to argue the behavior of the tariffs of energy in the period of 2002 the 2006, demonstrating the occurred increases and pointing a relation enters the rise of the price of this energy and the increase of the number of clandestine linkings and difficulty to hold the basics statements of actually electrical regiments. ANEEL's data show that in 1995 the tariff for class residential was R$ 76.26 and industrial was R$ 43.59; in 2003 passed respectively to R$ 236.34 and R$ 110.48. This analysis is directly related to the difficulty of obtaining a national energy management totally sustainable. (author)

  13. Seasonal variation of prices of sugar cane, ethanol and electric power; Variacao estacional dos precos da cana-de-acucar, alcool combustivel e energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Carmem Ozana de; Silva, Gerson Henrique da; Bueno, Osmar de Carvalho [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil); Esperancini, Maura Seiko Tsutsui [Universidade Estadual do Oeste do Parana (UNIOESTE), Francisco Beltrao, PR (Brazil)

    2010-07-01

    The aim of this study was to assess the seasonal price of sugar cane, fuel alcohol (hydrated and anhydrous) and electricity tariffs as a way of aiding tool for optimization of energy generation, using biomass originating from cane sugar. Using the method of moving average centered was concluded that cane and electricity rates were close to seasonal average, with low range of prices, suggesting the non-occurrence of seasonal variation in prices. Unlike the seasonal indices of ethanol showed seasonal variation of prices with greater amplitude of seasonal index. Thus, the results suggest that the utilization of by-products of sugar cane to produce electrical power points to the prospect of reducing risks associated with variations in the price of ethanol, thereby contributing to greater stability and possibility to those involved in planning alcohol sector. (author)

  14. Electric power end-consumption for Minas Gerais State until 2005; Projecao do consumo final de energia eletrica para Minas Gerais ate 2005

    Energy Technology Data Exchange (ETDEWEB)

    Bechlufft, Paulo C.T. [Companhia Energetica de Minas Gerais (CEMIG), Belo Horizonte, MG (Brazil)

    1992-12-31

    This paper analyzes the methodologies for electric power consumption prediction, including the various sectors of the industry, the service sector, the commercial sector and the public sector. The main objective of this methodology is create a energy policy which includes actualized data from the energy consumption and the expansion trends of the main sectors of the statement economy. 10 figs., 6 tabs.

  15. Analysis of economic feasibility of sale of surplus electricity in cogeneration: case study; Analise de viabilidade economica de venda de energia eletrica excedente em cogeracao: estudo de caso

    Energy Technology Data Exchange (ETDEWEB)

    Fodra, Marcelo [Universidade Estadual Paulista Julio de Mesquita Filho (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas; Universidade Sagrado Coracao (USC), Bauru, SP (Brazil)], email: marcelo.fodra@fca.unesp.br; Esperancini, Maura Seiko Tsutsui [Universidade Estadual Paulista Julio de Mesquita Filho (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Gestao e Tecnologia Agroindustrial], email: maura@fca.unesp.br

    2010-07-01

    The production of energy in large quantity and at competitive prices is crucial for economic development, which allied to the environmental question, has incentivated the use of renewable sources of energy. One of the most promising sources of renewable energy is the cogeneration from the residues of cane. Currently, the scenario for this kind of energy production is not consolidated, as production prices are not stable, inducing a risky situation for the environment. This work was aimed to study the economic viability of installing a main site for cogeneration of electricity, in a regional sugarcane factory located in the central region of Sao Paulo state that currently uses residues of sugar cane as fuel. The risk factor that was taken into consideration was the price paid for the MWh sold to the Chamber of Commerce of Electricity. The Monte Carlo Method was used to assess the risk factors for the analysis, by using of New Present Value (NPV), in a scenario that uses 20% of the initial investment made by the energy dealer. After the simulations were finished, considering the conditions used in this work, the project tends to be not feasible, as the behavior of the prices of cogenerated MWh are not sufficient for paying the initial investment and the operational costs. (author)

  16. Generation of electric power through wind-diesel hybrid system for a hospital; Geracao de energia eletrica atraves de sistema hibrido diesel-eolico para um hospital

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Silvio Carlos Anibal de; Freire, Raphael Lopes [Universidade Federal do Rio de Janeiro (DEM/UFRJ), RJ (Brazil). Dept. de Engenharia Mecanica], e-mail: silvioa@gmail.com, e-mail: raphaellfreire@gmail.com

    2008-07-01

    This paper presents a wind-diesel hybrid power simulation using the software Homer. The model is applied to the case study of Hospital das Clinicas da UNICAMP Analysis of several alternative energy facilities like wind, photovoltaic (PV), and connection of the isolated system with the grid is done. The costs used in the simulation indicated that the best results were obtained with the wind-diesel system. The payback period for the investment in the system is 8 years. (author)

  17. Fuzzy logic applied to the control of the energy consumption in intelligent buildings; Logica fuzzy aplicada ao controle do consumo de energia eletrica em edificios inteligentes

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Herbert R. do N.

    1998-02-01

    This work shows a study on the using of fuzzy control algorithms for the energy optimization of a standard building. The simulation of this type of control was performed using a central conditioned air model and the fuzzy control architecture already used in various control projects. This situation allowed a comparative study among the the control algorithms normally used in conditioned air installations, and the control performed through the building automation system, using an algorithm based on fuzzy logic.

  18. Planning under uncertainties paradigm - application to electric power distribution systems planning; Paradigma de planejamento sob incertezas - aplicacao ao planejamento dos sistemas de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Bianchi, Junior, Alberto

    1997-12-31

    In this work it is presented an original methodology of multistage planning, with conflictive objectives and restrictions, incorporating the concept of uncertainties. To do so, the proposed paradigm is based on the Dynamic Programming which comprehends the multistage subject to conflictive restrictions; on the Fuzzy Sets Theory, through the decisions and fuzzy numbers, which model the uncertainties and ambiguous decisions referent to qualitative variables; and on the consideration of evolutional rules associated to network flow algorithm. In its conceptual elaboration, the paradigm is developed in a very ample way, of generalized application to a well defined class of planning problems Particularly, the model fits in the flexible planning, which has been very discussed in the recent literature. Flexible planning must be understood as the one which allows to the planner, under well-defined limits, the evaluation of the planning policy composed by strips of options (discreet or continuous), associated to uncertainty levels related to the real world. In order to validate and consolidate the theoretic concepts, it was elaborated an algorithm turned to the aggregated planning of the distribution of electric energy, that presents intrinsic characteristics which are perfectly fitted in the paradigm`s applicability. (author) 41 refs., 26 figs., 36 tabs.

  19. An overview of electric power microgeneration in Brazil and abroad; Uma visao geral da microgeracao de energia eletrica no Brasil e no exterior

    Energy Technology Data Exchange (ETDEWEB)

    Filippo Filho, Guilherme [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Guaratingueta, SP (Brazil)

    2011-11-15

    The production of electricity in the small consumer installations, particularly made with environmentally friendly primary sources, increasingly gaining space. Several countries, including Brazil, has been reforming its regulations to increase the participation of microgeneration in the energy matrix. The article analyzes the laws and the evolution of the theme in the country and abroad, mainly in the UK.

  20. Electrical energy use in different heating systems for weaned piglets; Utilizacao de energia eletrica em diferentes sistemas de aquecimento para leitoes desmamados

    Energy Technology Data Exchange (ETDEWEB)

    Sarubbi, Juliana [Universidade Federal de Santa Maria (CESNORS/UFSM), Palmeiras das Missoes, RS (Brazil). Centro de Educacao Superior Norte-RS. Dept. de Zootecnia], E-mail: jusarubbi@hotmail.com; Rossi, Luiz A.; Moura, Daniella J. de; Oliveira, Rafael A. de; David, Eduardo [Universidade Estadual de Campinas (FEAGRI/UNICAMP), SP (Brazil). Fac. de Engenharia Agricola], Emails: rossi@agr.unicamp.br, daniella.moura@agr.unicamp.br, augustus@agr.unicamp.br, eduardo.david@agr.unicamp.br

    2010-11-15

    Heating piglets in nursery and farrowing may be improved to save energy, without affecting the animals' welfare. The objective of this research was to compare the electrical energy use and thermal environment promoted by three heating technologies for piglets in nursery. The heating technologies studied were: suspended electrical resistors, heated floor and convection heating. Electrical energy consumption (kWh), maximum power demand requirements (kW), specific consumption (kWh/kg of produced live body weight), efficiency of heating system (deg C /m{sup 3} air) and dry-bulb temperature (deg C) and temperature-humidity index were evaluated. The heated floor system was better under the aspect of electrical energy use. The electrical resistance heating system was the best regarding to the animals' thermal comfort needs. (author)

  1. Economic viability for electrical power generation using biogas produced in swine grange; Viabilidade economica da utilizacao do biogas produzido em granja suinicola para geracao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Cervi, Ricardo G. [Universidade Estadual Paulista (FCA/UNESP), Vale do Ribeira, SP (Brazil). Fac. de Ciencias Agrarias], e-mail: rghantous@registro.unesp.br; Esperancini, Maura S.T.; Bueno, Osmar de C. [Universidade Estadual Paulista (DGTA/FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agrarias. Dept. de Gestao e Tecnologia Agroindustrial], e-mails: maura@fca.unesp.br, osmar@fca.unesp.br

    2010-09-15

    Biogas production through anaerobic bio digestion represents an important breakthrough for the problem of swine waste and energy availability for rural areas. This work aimed to develop a study to estimate the economic viability of a bio integrated system installation and operation to produce electricity from swine wastes. Data for the study were collected in an agroindustry where there are plenty of agricultural activities; however the swine production activity was selected for the anaerobic digestion process because it generates a large amount of waste, with a limited provision in the environment, which characterizes a case study. The analyzed bio digester is a continuous tubular model with brick concrete duct and plastic covering with a gamester, and where the waste of 2,300 fattening pigs are deposited daily. The initial investment estimate for the installation was R$ 51,537.17. The system annual costs were R$ 5.708,20, for maintenance, R$ 4,390.40 for depreciation and R$ 1,366.77 for interests. It was concluded that the bio integrated system would achieve favorable economic results if the energy consumption were to 35 k W per hour a day, in average, where the net present value (NPV) is R$ 9,494.90 and the internal rate of return (IRR) is 9,34% per year. (author)

  2. Impacts of the expansion of distributed generation in distribution systems of electrical power; Impactos da expansao da geracao distribuida nos sistemas de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Marques, Frederico A.S.; Moran, Jesus A.; Abreu, Lisias; Silva, Luiz C.P. da; Freitas, Walmir [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Faculdade de Engenharia Eletrica e Computacao

    2004-07-01

    Due to the recent Brazilian electricity crisis, the advantages of the centralized rain dependent generation were put under discussion. The co-generation is an option for the consumer that does not want to be harmed by eventual interruptions in the energy supply and nor to pay higher tariffs during pick load. Besides, the excess of co-generation can be sold for the distribution companies, making possible that the independent producer has profits participating of the electricity power market. The distributed generation provides several benefits, for the fact of being a generation that is located close to the load. Besides, it allows the supply of the growing demand in a fast way, since the construction of big hydroelectric plants, that is the generation model more used in Brazil, is a slow process. With that, the insertion of distributed generation in the Brazilian system tends to become every more common year to year, as it has been happening in other countries. It is noticed, however, that few technical studies on the impacts of the distributed generation in the distribution systems were accomplished to the moment. Problems as over-voltages during light load, impacts on the protection system, and dynamic stability problems, very common in large centralized synchronous machines, can also start to happen in the distribution systems. This article presents a preliminary study on the influence of distributed synchronous generators in the operation of a distribution system. The analyzed technical aspects are: voltage profile, voltage stability, active and reactive power losses, and also critical clearing times for eliminating faults considering different sceneries. The simulations results show which are the main operative restrictions for maximizing the penetration level of distributed generation related with the dynamic and steady-state performance of the electricity distribution system. (author)

  3. Preliminary diagnosis on rational use of electrical energy in a slaughterhouse broilers; Diagnostico preliminar sobre uso racional de energia eletrica em um abatedouro de frangos de corte

    Energy Technology Data Exchange (ETDEWEB)

    Bueno, Leda Gobbo de Freitas; Rossi, Luiz Antonio [Universidade Estadual de Campinas (FEAGRI/UNICAMP), SP (Brazil). Fac. de Engenharia Agricola. Construcoes Rurais e Ambiencia], Emails: leda.bueno@agr.unicamp.br, rossi@agr.unicamp.br; Mederos, Barbara Janet Teruel [Universidade Estadual de Campinas (FEAGRI/UNICAMP), SP (Brazil). Fac. de Engenharia Agricola. Tecnologia de Processos], Email: barbarat@agr.unicamp.br

    2006-07-01

    In slaughterhouses, operations developed since the 'ante-mortem' until to the storage of the product, are heavily dependent on electric energy and responsible for the final product quality. The study of the size related to the consumption of electrical energy and the associated cost of this energy in the stages of the slaughter, are important not only for the entrepreneur but also for the final consumer. This way, aiming at to accomplish a preliminary diagnosis in relation to the use of the electric power, was measured values of the main electric parameters of the transformers slaughterhouse to know preliminary the use of this energy inside of the establishment. Later, in the continuation of this work, detailed and complemented studies will be accomplished in the several processes aiming at to diagnose, to analyze and to propose solutions to lead to the rational use of the electric power, without interfering, or to maintain, the quality of the final product in the lines of production of the poultry slaughterhouse, including the storage process that uses of chambers of cooling and freezing. (author)

  4. Feasibility of electric energy cogeneration with biogas from dairy cattle; Viabilidade da cogeracao de energia eletrica com biogas da bovinocultura de leite

    Energy Technology Data Exchange (ETDEWEB)

    Coldebella, Anderson; Souza, Samuel Nelson Melegari de [Universidade Estadual do Oeste do Parana (UNIOESTE), Cascavel, PR (Brazil). Curso de Mestrado em Engenharia Agricola], e-mails: andersonpesca@yahoo.com.br, ssouza@unioeste.br; Souza, Juliano de; Koheler, Ana Carolina [Universidade Estadual do Oeste do Parana (UNIOESTE), Cascavel, PR (Brazil)

    2006-07-01

    The technological conquests related to the evolution of the agricultural sector are dependent on some form of energy, among them, we can emphasize the electrical power, which has a high cost, and the derivates from petroleum, which are depleting with the years, generating price oscillation, insecurity about the further supplying, besides being highly polluters. Brazil already presents a tradition in the use of renovating sources of energy, emphasizing the electrical power, which is responsible for more than 80% of all electricity consumed in the country, followed by ethanol, a derivative from sugar cane that can be used pure or mixed with gasoline (derivative from petroleum) to substitute it. Although we have this tradition and we are already using some renovating sources of energy, we still have other sources with potential that are little exploited such as the solar energy, eolic energy and the biomass. Due it's a tropical country, Brazil shows a huge potential to the production of vegetal biomass, besides of produce industrial residues and residues generated by the agro-industrial activity. The western region is emphasized by the production generated by the agro industries, but, with the increasing of the demand and consequently the increasing of the production, the generation of manure, from bovines, pork, chicken or any other kind of animal is becoming a serious environmental problem. Those residues are important raw materials to the production of biogas, a fuel similar to the natural gas that can be converted in electrical, thermal or mechanical power inside the facility, reducing the costs of production. The efficiency of the co-generation systems varies according the composition of the biogas and the equipment used to the conversion, being possible reach 38%, that is equivalent to 2,0 to 2,5 kWh by m{sup 3} of biogas. This work has as objective evaluate the feasibility of the production of electrical power from the biogas generated by residues of the milk bovine culture, using an engine of internal combustion converted to biogas and linked to an electrical generator. (author)

  5. Electric energy/power quality: a new approach for old problems; Qualidade de energia/potencia eletrica: novo enfoque para antigos problemas

    Energy Technology Data Exchange (ETDEWEB)

    Ross, Ricardo Penido Dutt; Lima, Antonio Guilherme G; Lourenco, Plutarco M; Guarini, Antonio de Padua; Mello, Alex Jean de C. [Centro de Pesquisas em Energia Eletrica (CEPEL), Rio de Janeiro, RJ (Brazil); Ferro, Fernando [LIGHT Servicos de Eletricidade S.A., Rio de Janeiro, RJ (Brazil); Roncolato, Ronaldo [Companhia Paulista de Forca e Luz, Campinas, SP (Brazil)

    1996-12-31

    This work presents a new approach to deal with phenomenon long known such as voltage oscillation, harmonics and others which affect the quality of electric power supply. Also discussed is the importance of the union between electric power utilities and costumers in order to study, measure and quantify the deficit resulting, and, mostly important, to find solutions. Results are presented 7 figs., 3 refs.

  6. Potential electrical energy generation in Brazil with biomass waste by gasification process; Potencial para geracao de energia eletrica no Brasil com residuos de biomassa atraves da gaseificacao

    Energy Technology Data Exchange (ETDEWEB)

    Henriques, Rachel Martins

    2009-01-15

    The adoption of new technologies for generating electricity is based on technical, economic and environmental analysis. An important factor for choose the technology to be adopted is the raw material available for this purpose. Given the energy application below the potential of agricultural and urban solid waste, the growing demand for energy and the existence of environmental concerns, this thesis aims to emphasize the technology of gasification as an alternative for energy use of agricultural and urban solid waste. Thus, it describes the technology's state of the art, its maturity and improvement. Of great importance for understanding this process, it is needed to add the conclusions derived from experience in the gasification pilot plant at the University of Louvain la Neuve, Belgium. Considering the waste selected, the quantity available and the technology chosen, it is estimated the potential for electric energy that could be generated if the inputs were gasified. (author)

  7. An efficient linear approach in the reservoirs operation for electric power generation; Uma eficiente abordagem linear na operacao de reservatorios para geracao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Zambon, Katia Livia

    1997-07-01

    A new approach for the Scheduling of Hydrothermal Systems, with a formulation that allows the solution of the problem through the linear programming techniques, otherwise the original form, which is complex and difficult is presented. The models were developed through a linear form for the generation function of hydroelectric plants, successive of the linearization of the cost function of the problem. The linear techniques used were the Simplex Method, with some modification that is is efficient, fast and simple. The important physical aspects of the system were preserved, like the individual representation of the hydroelectric plant, the features of cost function with the exponential increase and the head effect. Besides, this formulation can lead to stochastic approaches. All the optimization methods were implemented for the solution of the problem. The performance obtained were compared with each other and with that obtained through the non linear techniques. The algorithms showed to be efficient, with good results and very near to the optimal behavior of the reservoir operation planning obtained by traditional methods. (author)

  8. The insertion perspective of electric power independent producer in the Brazilian electric power sector; A perspectiva da insercao do produtor independente de energia eletrica no setor eletrico brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Borelli, Alessio Bento; Bermann, Celio [Sao Paulo Univ., SP (Brazil). Programa Interunidades de Pos-Graduacao em Energia]. E-mail: mborelli@netpoint.com.br; cbermann@iee.usp.br

    1999-07-01

    The central issue of debate was the need to align the energy sector's options and organization with changing global patterns of economic and social development, characterized by the increasing role played by the private sector, greater integration in the world economy, and new economic and social priorities such as efficiency, decentralization, deregulation, and a closer attention to environmental issues. The aim of this work is to evaluate the electric power independent producer participation in Brazilian electric power sector.

  9. Basic strategies in the electric power industry in the new competitive environment; Estrategias basicas na industria de energia eletrica no novo ambiente competitivo

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro Filho, Ary Pinto [Agencia Nacional de Energia Eletrica (ANEEL), Brasilia, DF (Brazil)]. E-mail: arypinto@aneel.gov.br; Moraes, Walter Fernando Araujo de [Pernambuco Univ., Recife, PE (Brazil)]. E-mail: wfam@npd.ufpe.br

    1999-07-01

    This work identifies the probable strategic characteristics of the interconnected North-Northeast Brazilian electricity industry, after the current restructuring and privatization process has been implemented. It is a 15.0 thousand MW generation industry supplying more than 33.5 million consumers. The normative scenery for analysis of the electricity industry takes into consideration the premises that the government establishes the vertical separation of generation, transmission, distribution and retailing, and introduces the regulation to a competitive industrial structure in generation and retailing. It is assumed that free access to transmit and distribute electricity and broad choices for consumers are the main features for competition in both generation and retailing. The essence of formulating strategy is to relate a company with its environment, considering the industrial structure. The probable generic strategies and industrial trends are presented, and considerations are made concerned with the future expansion capacity. Finally, in the new industrial structure which will settle after the deregulation and privatization, the main strategic issues of the companies will likely focus on: profitability, cost control, managerial competence, consumer behavior, and new technologies, in special the ones related to modern thermal power plants. (author)

  10. Electric power generation using photovoltaic solar cells for low income rural population; Geracao de energia eletrica com celula solar fotovoltaica para populacao rural de baixa renda

    Energy Technology Data Exchange (ETDEWEB)

    Gastaldi, Andre Fava; Souza, Teofilo Miguel de; Mesquita, Rafael Pimenta [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Guaratingueta, SP (Brazil). Centro de Energias Renovaveis], e-mail: teofilo@feg.unesp.br

    2004-07-01

    With the growing electric energy use demand and almost not expansion of the energy mesh (basically composed by hydroelectric plants) existing in the country, several others methods of alternative energy generation may be necessary. Beyond that, the usually employed energy is becoming much more costly, rarer and politically more impracticable like burn fuels as oil and coal. The use of renewable approaches of energy, that are 'infinite' energies (as the wind and the light of the sun, for example), can become an excellent alternative. In this new energy group, the solar energy transformed by the use of photo voltage cells is becoming very important. The 'clear' solar radiation tends to be a more intelligent and practical option, and the future technology of energy storage will be able to solve the problem of the regions that have less sunny days. Its main advantages on the other alternative sources of energy are the trustworthiness and the previsibility. Its biggest disadvantage consists on the fact that technical limitations can not allow a solar energy generator to distribute electricity for a city. It is interesting to notice that with the development of projects as this in alternative energy, isolated areas that does not access electricity distribution network (as some far regions), it has become the most viable option of generation of electric energy. Another point is that even with the distribution network it has to be checked if it is possible to use this electricity consulting the company credential that work at those localities of consumption. Moreover, many regions of the country already installed the solar energy system for water heating, confirming that, the existing structure allows the installation of a a solar cells generation energy system without many problems. In this project, we introduce a method for electric energy generation by solar cells for rural population of low gains. This option uses low cost materials but with a good quality level. Also presents a comparative table showing a kit for rural areas employment which is constituted of: 3 fluorescent light bulbs (power of 9 W, 3 hours per day, 7 days per week), 1 T.V. of 14' ' (power of 15 W, 3 hours per day, 7 days per week) and 1 Radio (power of 5 W, 6 hours per day, 5 days per week). (author)

  11. Probable cases which gives ICMS credit in electric power tariffs; Estudo de casos passiveis de credito de ICMS em tarifas de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Reis, Lindemberg Nunes; Pinto, Danilo Pereira; Oliveira, Angelo Rocha de

    2006-07-01

    There are laws and many forms of using them that are ignored by a great part of the population. In this work one of those laws is emphasised, the complementary law n. 102/2000 of 11/07/2000 (that changed the C.L. 87/1996), that concerns the credit of ICMS in electric power taxes. The main focus of the work is the way the law is put into practice, how it can be used , who is able to receive the support of this law and who is not, ways of decisions that justifies the validation and two studies of real cases of companies that already process credits in his bill. In those two studies of accomplished cases they will be demonstrated in an emphatic way as you accomplish them and its importance. One of the cases is a consumer of small load, of the tax group B, where there is only a way of accomplishing the study, in case it is framed in the debit regime and credit. Already the second study of cases is of a consumer of the tax group A, of blue seasonal hour tax. As a last proposal of this work is the one of verifying, with those two accomplished cases, the difference of the decision evidentiary between the two companies and in that consumer kind (of the group A or B), it is usually the largest index of restitution of ICMS. (author)

  12. Interaction among the electric power concessionaire, the private sector and the customers; Interacao concessionaria de energia eletrica, iniciativa privada e clientes

    Energy Technology Data Exchange (ETDEWEB)

    Silva Pontes, Valdenir da; Mendonca, Antonio Carlos de; Pennachiotti, Carlos Cesar [Companhia Paulista de Forca e Luz (CPFL), Campinas, SP (Brazil)

    1992-12-31

    This present work shows a franchising plan for the consumer sector services: reading of the electric energy measuring equipment and bill delivering. In order to reduce the operational costs of the electric energy enterprises and the payment sheet, this plan will leads to optimize the crescent demand services. 1 tab., 2 refs.

  13. Implantation of a program of conservation and quality of electric power at UNICAMP; Implantacao de um programa de conservacao e qualidade de energia eletrica na UNICAMP

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Caio Gomes de; Sato, Fujio; Ruppert Filho, Ernesto; Kubo, Marcio Massakiti [Universidade Estadual de Campinas (NIPE/UNICAMP), SP (Brazil). Fac. de Engenharia Eletrica e de Computacao], e-mail: caio@dsee.fee.unicamp.br, e-mail: sato@dsee.fee.unicamp.br, e-mail: ruppert@dsce.fee.unicamp.br, e-mail: massakit@dsce.fee.unicamp.br

    2008-07-01

    This paper describes the results of the electrical energy conservation and power quality evaluation done in the University of Campinas (UNICAMP) in Sao Paulo State, Brazil through the Project named Ecogera. The analysis was based on the electrical signals acquired using measurement and energy management instruments. The replacement of the old lightning system using 40 W old fashion fluorescent bulbs mounted on non reflective fixtures by new energy save fluorescent bulbs mounted on reflective fixtures reduced expressively the electrical energy consumption and the installation electrical power demand. The measurements allowed to know the details of harmonic distortions and disturbances that affect the voltage magnitude. (author)

  14. Efficiency of the monocrystalline photovoltaic modules in conversion solar radiation into electrical energy; Eficiencia de modulos fotovoltaicos monocristalinos na conversao de radiacao solar em energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Carliane Diniz e [Universidade Estadual do Maranhao (UEMA), Sao Luis, MA (Brazil). Dept. de Engenharia Agricola], Email: carlianeds@yahoo.com.br; Seraphim, Odivaldo Jose [Universidade Estadual Paulista (FCA/UNESP), SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Engenharia Rural], Email: seraphim@fca.unesp.br

    2006-07-01

    With the scarcity of the conventional sources of energy production, other options must be considered, as the use of energy resources you renewed, that they offer to multiple advantages. One of the options to the supply of energy of the agricultural users is the photovoltaic solar systems for the local promotion of the quality of life. The objective of this study was to evaluate two marks of monocrystalline photovoltaic modules in different angles of inclination. The modules had presented low efficiency of conversion in conditions of field for incident solar radiation. (author)

  15. Selection of generation and supply alternatives in Brazilian isolated electric power systems; Selecao de formas de geracao/suprimento de energia eletrica em sistemas eletricos isolados do Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Robson S. Filadelfo dos [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Dept. de Engenharia Nuclear; Saliba, Aloysio Portugal M.; Martinez, Carlos B. [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Dept. de Engenharia Hidraulica e Recursos Hidricos

    1997-12-31

    Electric energy is an essential component of economical integration of the regions of a country. The operation of an isolated electric system do not admit the adequate rearrangement of the energy flux, mainly in the rush time, which takes to deficit situations in some economical sectors, accentuated by generation options that are not totally compatible with the local reality. This work performs an comparison on the various electric generation options in isolated systems, specially in the Amazon region, based on their local characteristics and generation costs, according to the existent data obtained in the literature or from the electric generation companies. (author) 10 refs., 1 fig., 2 tabs.

  16. Decomposition analysis of the variations in household electricity consumption in Brazil; Analise de decomposicao das variacoes no consumo de energia eletrica no setor residencial brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Achao, Carla da Costa Lopes

    2009-09-15

    Introduced at the end of the 1970s to study the impacts of structural changes on electricity consumption by industry, index decomposition analysis techniques have been extended to various other areas to help in the formulation of energy policies, notably in developed countries. However, few authors have applied these techniques to study the evolution of energy consumption in developing countries. In Brazil, the few available studies have focused only on the industrial sector. In this thesis, we apply the decomposition technique called the logarithmic mean Divisia index (LMDI) to electricity consumption of the Brazilian residential sector, to explain its evolution in terms of the activity, structure and intensity affects, over the period from 1980 to 2007. The results obtained in a preliminary analysis point out, in a general way, that the observed variables in electricity consumption in the Brazilian residential sector are, mainly, the product of the increase in the number of consumers and the changes in the specific consumption of electricity in households. In a further analysis, carried out when the structure is given through consumers participation in consumption categories (Low Income and Conventional) taken from an overall point of view, although the intensity and activity effects may be considered the main explaining factors in consumption variation, the structure effect stands out in the period immediately after the 2001 rationing, as a reflect of the changes in the inclusion criteria in the Low Income category, specifically in the Northeast. (author)

  17. Tele-operation of the electric power generation and transmission in large complex; Teleoperacao da geracao e transmissao de energia eletrica em complexo de grande porte

    Energy Technology Data Exchange (ETDEWEB)

    Martini, Jose Sidnei Colombo

    1992-07-01

    This work presents the specification and development outstanding aspects of a large supervisory and control power system. The engineering experiment, named SSCH - Hierarchical Supervision and Control System, occurred between 1982 and 1992 at Sao Paulo State and is an industrial automation power system most expressive cases carried out in this decade. More than complex development technical details, important management aspects concerning with large project execution are discussed. The SSCHs special characteristics are its dimension, complexity and realtime network analysis resources, applied to large power systems. (author)

  18. Potential electrical energy generation in Brazil with biomass waste by gasification process; Potencial para geracao de energia eletrica no Brasil com residuos de biomassa atraves da gaseificacao

    Energy Technology Data Exchange (ETDEWEB)

    Henriques, Rachel Martins

    2009-01-15

    The adoption of new technologies for generating electricity is based on technical, economic and environmental analysis. An important factor for choose the technology to be adopted is the raw material available for this purpose. Given the energy application below the potential of agricultural and urban solid waste, the growing demand for energy and the existence of environmental concerns, this thesis aims to emphasize the technology of gasification as an alternative for energy use of agricultural and urban solid waste. Thus, it describes the technology's state of the art, its maturity and improvement. Of great importance for understanding this process, it is needed to add the conclusions derived from experience in the gasification pilot plant at the University of Louvain la Neuve, Belgium. Considering the waste selected, the quantity available and the technology chosen, it is estimated the potential for electric energy that could be generated if the inputs were gasified. (author)

  19. Electric power consumption and GDP in Brazil: a cointegration analysis; Consumo de energia eletrica e PIB no Brasil: uma analise de cointegracao

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Bruno Goncalves da; Parente, Virginia [Universidade de Sao Paulo (IEE/USP), SP (Brazil). Inst. de Eletrotecnica e Energia], emails: brunosilva@usp.br, vparente@iee.usp.br

    2010-07-01

    There are many studies aimed at estimating the long-run relationship between GDP and energy. The main objective of this paper is to analyze this relationship for Brazil, taking as a starting point to other studies already done with cointegration methodology to other countries of the world, in order to determine how the Brazilian domestic product is related to energy consumption country.

  20. Solar energy for power generation and heating: actual situation and perspectives; Energia solar para geracao eletrica e aquecimento: situacao atual e perspectivas

    Energy Technology Data Exchange (ETDEWEB)

    Ahm, Peter [PA Energy A/S (Denmark)

    2009-05-15

    In just one hour, Earth receive from the Sun, the equivalent of all current global energy consumption for a year. Yet, solar energy, by means of water heating systems and photovoltaic generation, contributes today for less than 0.05% of world energy supply. This article analyse the state of the art of the technologies, their market potential, environmental impacts, interaction with the electric grids and expectations of expansion.

  1. Economical analysis of the use of biogas in swine production for generation of electric energy; Analise economica da utilizacao do biogas na suinocultura para geracao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Franco Muller; Oliveira, Paulo Armando Victoria de [EMBRAPA Suinos e Aves, Concordia, SC (Brazil)], Emails: franco@cnpsa.embrapa.br, paolive@cnpsa.embrapa.br

    2009-07-01

    The demand for alternative sources of energy has been growing in the last years in function of the variation on the prices of petroleum and the recent energy crisis. The anaerobic bio digestion can convert swine manure in biogas. In the present work it was studied the economic viability of the use of the biogas as alternative source for the generation of electric energy in different demand levels. The methodology utilized was the Net Present Value. The study showed that the utilization of biogas as electric energy source is economically feasible. The increase of the demand of electric energy, in the property, associated to the increase of the price of the electric energy, increases the economical profits and accelerates the time of return of the investments. (author)

  2. Economic analysis of the generation of electric energy from biogas in pig production; Analise economica da geracao de energia eletrica a partir do biogas na suinocultura

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Franco M.; Oliveira, Paulo A.V. de [EMBRAPA Suinos e Aves, Concordia, SC (Brazil)], Emails: franco@cnpsa.embrapa.br, paolive@cnpsa.embrapa.br

    2011-06-15

    The demand for alternative sources of energy has grown in recent years in line with the variation of petroleum prices coupled with the recent energy crisis. Through anaerobic digestion swine manure can be converted into biogas. In the present study it was evaluated the economic viability of using biogas as an alternative source for the production of electricity, for different periods of generation. The method used for the economic evaluation was the net present value (NPV). The time of return on invested capital was also calculated taking into account the discount interest rate on cash flows. The study proved to be economically viable use of biogas from swine manure as a source for generating electricity. The increased demand for electricity in the property increases the net present value and decreases the time required for return of the investment. (author)

  3. Electric energy deficit marginal cost: historic, evaluation and proposition of a new method; Custo marginal do deficit de energia eletrica: historico, avaliacao e proposta de uma nova metodologia

    Energy Technology Data Exchange (ETDEWEB)

    Loureiro, Paulo Gerson Cayres

    2009-05-15

    The optimization model actually used to the energy operation planning of the National Interconnected System - NIS has as objective function the minimization of expected total cost operation. To achieve this goal the model provides optimal allocation of hydrothermal resources during the study horizon, employing aggregated subsystems. The deficit marginal cost is a parameter which is explicitly informed to the model, and does a part in the operation total cost calculation being a predominant factor in the service conditions evaluation of national electric energy market, affecting the energy costs and the risk of deficit on NIS. In this work is realized an integral study about the electric energy deficit marginal cost, starting with a historical review, followed by a actualization of your actual value and a propose of a new method for the calculation of deficit marginal cost value. The studies shows the impact of the values found over service conditions to the electric energy market in the energy operation planning, focusing on some usual indicators adopted in studies of the electrical sector. (author)

  4. Program for conservation of electric energy, its developments and needs for consolidation; Programa de conservacao de energia eletrica, seus desdobramentos e necessidades para consolidacao

    Energy Technology Data Exchange (ETDEWEB)

    Vianna, Luiz Gustavo de Vargas; Ramos, Maria Olivia de Souza; Pereira, Osvaldo Soliano [Universidade Salvador (UNIFACS), BA (Brazil)

    2010-07-01

    The object of this article is to present the National Program for Conservation of Electric Energy (PROCEL), used in Brazil as a solution for the problems of rational use of electric energy by the federal government. It presents a brief history of its creation, several activities areas that it is proposing to act and some results obtained at the moment. It discusses the program's expectation and the potential gains, tracing a brief parallel with the National Plan of Climate Changes. The weak points are presented as suggestions for improvement. Other programs in different stages also are presented like a solution for the conservation of electric energy. Finally, the article presents the actual stage of discussions and actions from society in response to the question of the continuation of the conservation of electric energy's programs and its necessary improvement in Brazil. (author)

  5. An environment for operation planning of electrical energy distribution systems; Um ambiente para planejamento da operacao de sistemas de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Hashimoto, Kleber

    1997-07-01

    The aim of operation planning of electrical energy distribution systems is to define a group of interventions in the distribution network in a way to reach a global optimization. Both normal operation and emergency conditions are considered including scheduled interventions in the network. Under normal conditions, some aspects as voltage drop and loss minimization, for example, are considered; under emergency conditions, the minimization of non-distributed energy and interruption time are taken into account. This proposes the development of a computer environment for operation planning studies. The design and implementation of a specific operation planning database, based on a relational database model, was carried out so that new information modules could be easily included. A statistical approach has been applied to the load model including consumption habits and seasonal information, for each consumer category. A group of operation planning functions is proposed, which includes simulation modules responsible for system analysis. These functions and the database should be designed together. The developed computer environment allows the inclusion of new functions, due to the standardized query language used to access the database. Two functions have been implemented for illustration. The development of the proposed environment constitutes a step towards an open operation planning system, an integration with other information systems and an easy-to-use system based on graphical interface. (author)

  6. Regenerative electronic load for electric power sources tests using capacitive idling converter; Carga eletronica regenerativa para testes de fontes de energia eletrica utilizando conversor com capacitor flutuante

    Energy Technology Data Exchange (ETDEWEB)

    Vendrusculo, Edson Adriano

    1996-07-01

    The conventional method for testing power supplies, batteries, uninterruptible power supply and other sources of electric power uses resistors as load. This results in wasted heat and increases the equipment production cost. This work presents a Regenerative electronic Load to substitute those resistors. The basic topology is a capacitive idling Cuk converter. This converter allows to control independently the input current and permits to provide a sinusoidal output current. An appropriate gate command allows to have some soft-commutation without the use of any auxiliary circuit. The same converter, with input and output changed, can operate as a Power Supply with Input Power Factor Correction. The characteristics of soft-commutation and high efficiency are maintained. A simple high-efficiency transformer allows output isolation. All theoretical results are experimentally verified. (author)

  7. Model of electric power generation for isolated places of the Amazon: intervention with sustainability; Modelo de geracao de energia eletrica para localidades isoladas da Amazonia: intervencao com sustentabilidade

    Energy Technology Data Exchange (ETDEWEB)

    Moret, Artur de Souza [Fundacao Universidade Federal de Rondonia (GPERS/UNIR), Porto Velho (Brazil). Dept. de Fisica. Grupo de Pesquisa Energia Renovavel Sustentavel], E-mail: amoret@unir.br

    2010-07-01

    This paper presents a proposal which has as reference the implementation of electric power generation using vegetable in natura palm oil in a Diesel cycle engine not modified to attend the N. S. dos Seringueiros at the extractivist reservation Rio Ouro Preto, Brazil. It must be detached that the interventions at the RESEX has assumed that it is possible and necessary to aggregate value to the forest products having the biodiversity preserved.

  8. Energy savings in heating systems for nursery pigs; Uso racional de energia eletrica em sistema de aquecimento para creches de leitoes

    Energy Technology Data Exchange (ETDEWEB)

    Sarubbi, Juliana; Rossi, Luiz Antonio; Moura, Daniella Jorge de; Oliveira, Rafael Augustus de; David, Eduardo [Universidade Estadual de Campinas (FEAGRI/UNICAMP), SP (Brazil). Fac. de de Engenharia Agricola], Emails: rossi@feagri.unicamp.br, daniella.moura@feagri.unicamp.br, augustus@feagri.unicamp.br

    2009-07-01

    Energy saving procedures in pig industry are important to bring sustainability to this economic activity. Energy savings can contribute to the economic and environmental feasibility of the livestock and improve animal welfare conditions. This research work aimed to perform a comparison among three heating technologies for nursery pigs related to the energy saving aspects. Three heating systems were studied: TR - suspended electrical resistors, TP - heated floor and TA - convection heating. The heated floor system was considered better than other under the aspect of electrical energy use. (author)

  9. Biomass gasification systems in electric energy generation for isolated communities; Sistemas de gaseificacao de biomassa na geracao de energia eletrica para comunidades isoladas

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Velazquez, Silvia M. Stortine Gonzales; Martins, Osvaldo Stella; Santos, Sandra Maria Apolinario dos; Basaglia, Fernando [Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil)], e-mail: suani@iee.usp.br, e-mail: sgvelaz@iee.usp.br, e-mail: omartins@iee.usp.br, e-mail: sandra@iee.usp.br, e-mail: basaglia@iee.usp.br; Ushima, Ademar Hakuo [Instituto de Pesquisas Tecnologicas (IPT), Sao Paulo, SP (Brazil)], e-mail: adidas@ipt.br

    2004-07-01

    The project 'Comparison Among Existing Technologies of Biomass Gasification', agreement FINEP/CT-ENERG 23.01.0695.00, is a partnership between CENBIO - The Brazilian Reference Center on Biomass, BUN - Biomass Users Network of Brazil, IPT - Technology Research Institute and UA - Amazon University. The main objective of this project is to study a biomass gasifier system and its implantation, using a sustainable way, at isolated communities in the North Region, offering an alternative to replace fossil fuel. The system is composed by a gasifier from Indian Institute of Science - IISc, that can generate 20 kW of output energy, a generator (internal combustion engine), an ashes extractor, a water cooler and treatment system, a dryer and a control panel. The project, developed at IPT, intends to evaluate the operation conditions of the gasification system: gas cleaning, electric power generation and the technology transfer to Brazil, allowing the formation of human resources in the Brazilian North region and collaborating with the national institutions from this area. (author)

  10. Intelligent techniques applied in identifying fraudsters industrial consumers of electricity; Tecnicas inteligentes aplicadas na identificacao de consumidores industriais fraudadores de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Ramos, Caio C.O.; Souza, Andre N. de; Pereira, Lucas I.; Gastaldello, Danilo S. [Universidade Estadual Paulista (UNESP), Bauru, SP (Brazil). Dept. de Engenharia Eletrica], Emails: caioramos@gmail.com, andrejau@feb.unesp.br, ra510611@feb.unesp.br, danilosg@feb.unesp.br; Zago, Maria G. [Universidade de Sao Paulo (EP/USP), SP (Brazil) Escola Politecnica], Email: mgzago@usp.br; Papa, Joao P. [Universidade Estadual Paulista (UNESP), Bauru, SP (Brazil). Dept. da Computacao], Email: papa.joaopaulo@gmail.com

    2009-07-01

    The development of a computational intelligent tools based on neural network to identify commercial losses or fraud (theft energy), considering information from a database electric utility, is presented.

  11. Generation of electric power from biogas originating from sewage treatment; Geracao de energia eletrica a partir do biogas proveniente do tratamento de esgoto

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Velazquez, Silvia Maria Stortini Gonzalez; Silva, Orlando Cristiano da; Pecora, Vanessa; Abreu, Fernando Castro de [Universidade de Sao Paulo (CENBIO/IEE/USP), Sao Paulo, SP (Brazil). Inst. de Eletrotecnica e Energia. Centro Nacional de Referencia em Biomassa], e-mails: suani@iee.usp.br, sgvelaz@iee.usp.br, gbntumbo@iee.usp.br, vpecora@iee.usp.br, fcabreu@iee.usp.br

    2006-07-01

    The main objective of the effluent treatment is to correct its undesirable characteristics, however, during this process, residues like sludge and biogas are generated, and those residues can be used as raw materials The PUREFA (Program of Rational Energy Use and Alternative Sources), compound by 14 purposes, is about a project of the USP - University of Sao Paulo, financial backer FINEP - Financier of Studies and Projects. This project had three main objectives: to implant measures of management and action of energy efficiency, to increase the distributed generation in the USP from the renewable resource and not conventional energy and to introduce incentive permanent politics to the efficient and rational use of energy. In the context, the Brazilian Reference Center on Biomass was responsible for two purposes, related to the biogas use for electricity generation. The first purpose had main objective to implant the generation system, to capture and to stock the biogas, produced by biodigester in the Technological Hydraulically Center (CTH - USP). The biodigester is a UASB (Upflow Anaerobic Sludge Blanket), whose outflow of the biogas produce is near 4 m{sup 3}/day, opera rates 24 hours per day and utilize the sewer from the residential buildings located in Sao Paulo University, inside the campus. For the biogas utilization, was made its outflow, chemical composition and heat value identifications, parameters that allowed to determinate the real potential for generation and to shown the necessity of the previous treatment, as H{sub 2}S removal. Finished this stage, was started the next purpose, regarding biogas used as fuel for electricity generation using a generator group Otto cycle. Nowadays this project is a demonstrative project. In this article the technical and environmental project results obtained will be presented. (author)

  12. Losses and unpaid bills in the electricity distribution activities in Brazil; Perdas e inadimplencia na atividade de distribuicao de energia eletrica no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Antonio Carlos Marques de

    2007-04-15

    The main purpose of this paper is to deepen the discussion about the impact of the electrical losses and the unpayment of the correspondent bills in the Brazilian market of electricity distribution, by establishing the dimension of the problem and analysing the main physical, economic and social variables which explain the rambling occurrence of the phenomenon among the companies all over the country. The study was developed by using statistical models which made possible to built explaining models. Furthermore, the paper discusses the institutional treatment given to the issue by the Brazilian federal regulatory agency, under a tariff, technical and regulatory point, and comments the actions adopted by the companies to minimize the consequent revenue impact. Finally, conclusions and some suggestions are presented regarding complementary studies related to this field of knowledge. (author)

  13. Solution of equations of electric power networks in multiprocessor computers; Solucao de equacoes de redes de energia eletrica em computadores multiprocessadores

    Energy Technology Data Exchange (ETDEWEB)

    Feltrin, Antonio Padilha

    1991-05-01

    This thesis describes a methodology for decomposing the repeat solution process the equation Ax = b independent tasks to be done in parallel, based on the matrix inverse factors (W-matrix) with partitions. The partitioning scheme proposed in this thesis consists of breaking up the W-matrix according the depths of the factorization path tree. In this scheme, all the information needed to generate the partitions can be obtained straightforward from the network factorization path tree. The partitioning algorithm is simple and ease to implement. The elements of W, matrices, except the last partition, can be obtained directly from L-matrix elements, not requiring extra work. The proposed scheme guarantees that additional fills be only created in the last partition. The forward and backward solutions are performed by rows, and the strategy proposed is to schedule on beach processor the operations corresponding to a row of each partition. It should be kept in mind that the multiprocessor environments are equipped with powerful unit processor and then it seems a sound strategy to perform the multi-add elementary operations inside the hardware in order to exploit its computing efficiency. This strategy seeks to match the parallel algorithm to the parallel architecture. The precedent relations - that give rise to delays - are replaced by multi-add operations performed inside the processor mode without external communication. In the partition, the forward, diagonal and backward solutions may be gathered, and so all the operations can be expressed as the product of matrix W{sub lp} by the update components of vector b. The performance results show that the potential speedup of the solution time is essentially bounded by the floating point operation capability of each processor, denoting that the methodology is a suitable way to exploit the growing power of the computing technology. 46 figs, 40 refs, 49 tabs.

  14. Ergonomic analyse of operation work in electric energy transmission substation; Analise ergonomica do trabalho de operacao de subestacoes de transmissao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Menegon, Nilton Luiz

    1993-04-01

    The activity by the workers in sub-stations which transmits and distributes electric energy is studied within the context of ergonomic, i.e., of its adequateness to the human being characteristics. In the introduction of this book the ideas of ergonomic related to the behaviour of the workers who works which continuous processes in control room are reviewed. The development of the ideas in this field as well as the methodology to be followed in this work are discussed. The technical system involving the activities of the workers in sub-station is presented. These activities are inserted within a broad context of the electric energy sector. An analysis concerning the problems in the ergonomic field which justifies the ergonomic intervention follows the previous study. The work situation is characterized. The formal organization of the work and its physical and cognitive demands are examined. The task is explained in detail. With the analysis of the activities based on the systematic observation of the work performed by the workers, we finish this study. Finely, a diagnosis of the work situation and the recommendations compromised whit the workers health and improvement of the performance is settled. (author) 27 refs., 26 figs.

  15. Analysis of electric power cogeneration using sugar cane bagasse; Uma analise da cogeracao de energia eletrica usando bagaco de cana-de-acucar

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Anna Cristina Barbosa Dias de

    1997-07-01

    Brazil impels its economy again. A development expected in 80 and 90 years it is real. This growth demands new technologies, new researches and bases that bear that growth. Electric power is in these bases, but Brazil is not ready for that. Electric power cogeneration possibility appears, using sugar cane bagasse. Alcohol and sugar plants have already that practice working with a low generation volume. With some investment this volume can be increased, adding about 10% to national energetic matrix. The aim of this work is to present a short time alternative for national electric matrix. It shows the energetic situation of the country, some experiences already implanted in some countries around the world and some options for equipment improvement used in alcohol and sugar plants. It is shown alternatives sources of electric power generation studied on Brazil, as well as the planning of National Energetic Program of ELETROBRAS. It analyses, in details, sugar cane bagasse use, which is used in Sao Paulo plants to generate electric power. Possible systems and troubles for its implantation in sugar and alcohol plants are discussed. (author)

  16. Policy, planning and generation of energy surpluses in a sugar and alcohol plants; Politica, planejamento e geracao de excedentes de energia eletrica no setor sucroalcooleiro

    Energy Technology Data Exchange (ETDEWEB)

    Agarussi, Maria Alessandra Silva Nunes; Martins, Juliana Marinho Cavalcanti [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Curso de Pos-Graduacao em Planejamento de Sistemas Energeticos

    2008-07-01

    This present work has as it main purpose to analyze briefly the Decenal Plan of Energy Expansion and the National Energy Plan 2030 in relation to the surplus energy cogeneration capacity from sugar and alcohol industry in Brazil. At the same time, this work also intends to compare the existent public policies to foment the surplus electric energy production such as the Proinfa and energy auctions and the acquisition of more efficient cogeneration systems by the sugar cane sector. (author)

  17. Analysis of technological options for electric energy generation from urban solid wastes; Analise de opcoes tecnologicas para geracao de energia eletrica a partir de residuos solidos urbanos

    Energy Technology Data Exchange (ETDEWEB)

    Furtado, J.G. de M.; Serra, E.T. [Centro de Pesquisas de Energia Eletrica (CEPEL), Rio de Janeiro, RJ (Brazil)], Emails: furtado@cepel.br, etserra@cepel.br

    2010-07-01

    This paper evaluates technologically of the options existents for generation of electric power from the urban solid wastes (USW), based on application of factoring method for estimation of investments based on basic description of the plant, it main equipment and technological complexity, viewing to contribute for determination of better technical and economical form, and the energy using. The results of the effectuated analyses indicates that the most technological complexity of the gasification and thermal plasma, and be encountered on non commercial in great scale as well, make the the option present the greatest index of investment and relative cost, determining the greatest costs of electric power generated through this process.

  18. Dynamic preventive control of electric power systems through load shedding; Controle preventivo dinamico de sistemas de energia eletrica: formulacao atraves do corte de carga

    Energy Technology Data Exchange (ETDEWEB)

    Righeto, Luzia F.P.; Minussi, Carlos R. [UNESP, Ilha Solteira, SP (Brazil). Dept. de Engenharia Eletrica

    1997-12-31

    This work presents a model to be used in Electric Power System preventive control, taking into account the dynamic network aspects, the effects caused by great oscillations in the synchronous machines angles (transient stability), electric equipment outages, short-circuit, etc. The energy function will be used as a form of measure the system stability degree using a criterion defined as security margin. The used control action will be the load shedding. (author) 16 refs.; e-mail: minussi at dee.feis.unesp.br

  19. Sulfide gas effects on the power transmission lines; Efeito do gas sulfidrico nos componentes do sistema de transmissao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Kajimoto, Zehbour Panossian; Almeida, Neusvaldo Lira de

    1993-12-31

    Copper and its alloys when exposed in atmosphere contaminated with sulphur compounds present stains due to sulfidation. This sulfidation is markedly influenced by temperature and air relative humidity. In this works, results from tests with three years of exposition in atmospheres containing H{sub 2}S and SO{sub 2} are related; such results show that the use of these materials in regions with these contaminants must be done with restriction. Besides the high copper corrosion rates, corrosion products which form on this metal can cause serious problems to the electric contact. (author) 8 refs., 4 figs., 4 tabs.

  20. Evaluation of the reliability of electric power transmission systems; Evaluacion de confiabilidad de sistemas de transmision de energia electrica

    Energy Technology Data Exchange (ETDEWEB)

    Vega Ortiz, Miguel

    1989-07-01

    algorithm in a digital program, this was proved in a personal computer applying it to IEEE transmission systems evaluated with other methods, among them one of 140 buses and 199 transmission lines. The results as far as reliability indexes compared with the other methods were very satisfactory and promising as far as required CPU time and memory for larger systems. [Spanish] En esta tesis se ataca el problema de la Evaluacion de la Confiabilidad de los Sistemas de Transmision de Energia Electrica para fines de su planeacion integral. Una vez descrito el problema se presentan los indices que miden la confiabilidad de los sistemas electricos de potencia. Despues se describen los metodos para evaluar las redes de transmision, como el de Enumeracion de Contingencias, el Monte Carlo, el de Markov y los metodos para sistemas complejos como el de Cortes Minimos. Este ultimo se desarrolla ampliamente por las ventajas que presenta su aplicacion en la planeacion de redes grandes y complejas. El metodo de cortes minimos consta de dos grandes pasos: Determinar los cortes minimos para los puntos de carga y calcular los indices de confiabilidad en base a los cortes minimos. Los algoritmos convencionales para la determinacion de cortes minimos consideran un problema por cada punto de carga en forma independiente pasando por una determinacion de caminos minimos. En este tipo de algoritmos el tiempo de CPU y el espacio en memoria requeridos crecen exponencialmente para el caso de sistemas de transmision grandes, lo que representa una fuerte restriccion para su aplicacion. Para resolver este problema se establecio una metodologia en la que se modela el sistema por medio de un grafo y se determinan los cortes minimos con un algoritmo basado en la construccion de ciclos en el grafo dual. Con estos cortes se evalua la conexidad y capacidad de la red, obteniendose los indices de confiabilidad para cada bus y para el sistema. Estos indices se calculan con la representacion equivalente para

  1. National Energy Plan 2030: a proposal for power generation expansion in the long term; Plano Nacional de Energia 2030: uma proposta de expansao para a geracao de energia eletrica no longo prazo

    Energy Technology Data Exchange (ETDEWEB)

    Guerreiro, Amilcar Goncalves; Pereira Junior, Amaro Olimpio; Lopes, Juarez Castrillon; Tavares, Marina Elisabete E.; Silva, Renata de A.M. da; Queiroz, Renato P.; Oliveira, Ricardo G. de [Empresa de Pesquisa Energetica (EPE), Brasilia, DF (Brazil)

    2008-07-01

    The article aims to present and discuss a proposal for electric energy expansion generation capacity in long term. This work identifies the most appropriate evolution of the hydrothermal mix for the expansion of the supply of electrical power in the country, over the horizon of planning by 2030. (author)

  2. Energy agriculture in the Vale do Sao Francisco: electric power production from the sugar cane; Agricultura de energia no Vale do Sao Francisco: a cogeracao de energia eletrica a partir da queima do bagaco de cana-de-acucar

    Energy Technology Data Exchange (ETDEWEB)

    Fraga Neto, Amintas Ferreira; Pinto, Adeon Cecilio [Universidade Federal do Vale do Sao Francisco (UNIVASF), Juazeiro, BA (Brazil). Curso de Engenharia de Producao], E-mail: adeon.pinto@univasf.edu.br

    2009-07-01

    The continuous increasing on energy demand has generated some preoccupation for both public and private sectors involved on search and creation of new sources of energy. Within this context, fossil and hydraulic energy sources have encountered barriers to its development. In order to solve this puzzle, a new paradigm emerges based on the use of renewable sources of energy. Among these energy sources it can be mentioned solar plants, wind mills and biomass. The option for determined energy source is related to aspects such as: technological knowledge, tradition on use and availability. In a global view, the renewable resources represent 20% of the overall energy supply. This datum shows the relevance of this topic. This paper aims to expose a theoretic discussion about the adoption of renewable energy sources in the San Francisco Valley. It also offers a diagnosis of the use of such sources in household energy. (author)

  3. A method for optimization of patient dose estimation in conventional radiology; Un metodo per l'ottimizzazione della stima della dose al paziente nella radiologia tradizionale

    Energy Technology Data Exchange (ETDEWEB)

    Tofani, A.; Del Corona, A. [Azienda Unita' Sanitaria Locale 6, Livorno (Italy). Unita' Ospedaliera di Fisica Sanitaria; Niespolo, A. [Azienda Ospedaliera Pisana, Pisa (Italy). Unita' Ospedaliera di Fisica Sanitaria

    2000-05-01

    Gkanatsios per il calcolo della dose efficace mediante interpolazione lineare dell'energia impartita per unita' di prodotto area-dose in funzione dello spessore emivalente e mediante coefficienti che dipendono dallo spessore del fantoccio e dalla tensione di picco utilizzata. Abbiamo individuato un processo di normalizzazione con il quale e' stato possibile rapportare la dose calcolata secondo la procedura summenzionata all'equivalente di dose efficace al corpo intero ottenuta col metodo ICRP. In questo modo si e' riuscito a determinare la dipendenza della dose dalla distanza fuoco-pellicola, dal formato della pellicola e dall'anatomia del paziente. Si e' trovato che - fissata la massa del paziente - la dipendenza della dose dalle dimensioni della pellicola puo' essere approssimata da una funzione di tipo polinomiale, mentre la dipendenza dalla distanza fuoco-pellicola puo' essere approssimata da una legge di potenza. Per variazioni relativamente piccole di questi parametri rispetto agli standard ICRP,(abstract truncated)

  4. Eesti Energia sihib hiiglaslikku hinnatõusu / Andrus Karnau

    Index Scriptorium Estoniae

    Karnau, Andrus

    2007-01-01

    Ilmunud ka: Postimees : na russkom jazõke, 5. sept. 2007, lk. 2. Eesti Energia taotleb 2007. aasta märtsikuust 23%-list hinnatõusu. Energiaturu inspektsiooni (ETI) juhi Märt Otsa sõnul pole teada, mis otsuse inspektsioon hinnatõusu küsimuses langetab. Diagramm: Elektri hind tõuseb jõudsalt. Vt. samas intervjuud Eesti Energia juhatuse liikme Tiit Niguliga

  5. Som Energia: sostenibilitat energètica i cooperativisme

    OpenAIRE

    Duran i Grant, Alexandre; Huijink, Gijsbert; Roselló, Marc

    2013-01-01

    La cooperativa Som Energia és una organització innovadora en el sector energètic a casa nostra. Proposa una forma de fer diferent de la de les empreses tradicionals del sector: ven energia renovable certificada, no té ànim de lucre i busca el bé comú. La proposta treballa per la sostenibilitat energètica.

  6. Biodiesel: uma energia alternativa e verde

    Directory of Open Access Journals (Sweden)

    Milena Carvalho Teixeira

    2010-12-01

    Full Text Available O presente texto busca expor a importância do uso de energias alternativas. O biodiesel é apontado como uma das soluções para o esgotamento do petróleo e seus derivados e para o problema do aquecimento global, e o Brasil, por apresentar biodiversidade e forte economia agrícola, permitiu que o Governo Federal criasse o Programa Nacional de Produção e Uso de Biodiesel (PNPB com chances de sucesso. O programa explora várias fontes energéticas, de culturas temporárias e perenes ao uso do óleo residual, além de trazer benefícios ao desenvolvimento do país, gerando emprego e renda, e, principalmente, redução nas emissões de gás carbônico.

  7. "Oravad" tõmbavad Eesti Energia börsileminekule piduri peale / Raimo Poom

    Index Scriptorium Estoniae

    Poom, Raimo

    2010-01-01

    Riigikogu Reformierakonna fraktsiooni kohtumisest Eesti Energia juhi Sandor Liive ning majandus- ja kommunikatsiooniministeeriumi esindajatega. Fraktsiooni esimees Peep Aru räägib küsimustest, mis on seotud Eesti Energia börsilemineku kavaga

  8. Parts ja Tiivas peavad aega Eesti Energia börsile tulekuks heaks / Jaana Pikalev

    Index Scriptorium Estoniae

    Pikalev, Jaana

    2010-01-01

    Majandus- ja kommunikatsiooniminister Juhan Partsi sõnul tuleks Eesti Energia aktsiat müüa soodustingimustel. East Capital Exploreri juhi Gert Tiivase hinnangul pole paremat aega Eesti Energia börsile toomiseks kui praegu

  9. Sõnnikust elektri tootmine on Eesti Energia otsustada / Toivo Tänavsuu

    Index Scriptorium Estoniae

    Tänavsuu, Toivo

    2006-01-01

    Seakasvatusfirma Ekseko tahab hakata seasõnnikust elektrit ja soojust tootma, kui Eesti Energia finantseerib projekti. Taani konsultatsioonifirma Energy Consulting Network soovitab rajada koostootmisjaama maksumusega umbes 50-60 miljonit krooni. Lisa: Eesti Energia teeb otsuse lähiajal

  10. Energy saving in heat exchangers of industrial refrigeration systems; Ahorro de energia en intercambiadores de calor en los sistemas de refrigeracion industrial

    Energy Technology Data Exchange (ETDEWEB)

    Padilla, A; Romero Paredes, Hernando; Ambriz, Juan Jose [Universidad Autonoma Metropolitana-Iztapalapa, Mexico, D. F. (Mexico)

    1994-12-31

    This paper presents the energy losses of the heat exchangers utilized in industrial refrigeration systems . The effects of the different scaling products on the heat transfer rates are presented and the energy not transferred because of them is evaluated. A simplified method for the evaluation is developed and applied to the evaporators and condensers more frequently employed in the industrial refrigeration systems. The internal and external heat transfer coefficients are evaluated in different types of heat exchangers. The energy losses as a function of the scale thickness on the heat exchanger is shown. [Espanol] El trabajo presenta las perdidas energeticas que se tienen en los intercambiadores de calor usados en los sistemas de refrigeracion industrial. Se presentan los efectos que tienen los diferentes incrustantes en las tasas de transferencia de calor y se evalua la energia que no se transfiere causada por aquellos. Se desarrolla un metodo simplificado de evaluacion y se aplica a los evaporadores y condensadores mas comunes empleados en los sistemas de refrigeracion industrial. Se evaluan los coeficientes internos y externos en diferentes tipos de intercambiadores. Se muestran las perdidas energeticas en funcion del espesor del incrustante en la pared del intercambiador.

  11. Eesti Energia tegi esimesed tehingud elektribörsil / Kerli Nõu

    Index Scriptorium Estoniae

    Nõu, Kerli

    2006-01-01

    Eesti Energia ei avalikusta NordPoolil sõlmitud tehingute mahtu ärisaladuse tõttu. NordPooli börsil hajutavad riske energia tootjad, suurtarbijad ja hulgikauplejad, kes peavad end energia hinnatõusu vastu kaitsma. Järgmise aasta tulevikutehingute hinda mõjutavatest teguritest. Lisa: NordPool

  12. Clean generation of electric energy; Generacion limpia de energia electrica

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez, Juan M.; Torres, Emmanuel [Centro de Investigacion y de Estudios Avanzados (CINVESTAV), Unidad Guadalajara (Mexico)

    2006-10-15

    This article deals on the existing alternatives of renewable energy for generation of electricity free from polluting sequels within the Mexican territory and presents a global overview on the electricity generation in Mexico. Wind power, hydraulic energy, biomass, photovoltaic and fuel cells are sources of renewable energy that could contribute to Mexico's sustainable development, for this reason it is discussed on the main sources of renewable energy in Mexico - solar and wind energy, mini-hydraulic, biomass and geothermal -, on their development and evolution, cost, insertion projects and obstacles for their correct development in this country. [Spanish] Este articulo versa sobre las alternativas de energia renovable existentes para una generacion de electricidad libre de secuelas contaminantes dentro del territorio mexicano y presenta un panorama global sobre la generacion de electricidad en Mexico. La energia eolica, hidraulica, biomasa, fotovoltaica y las celdas de combustible son fuentes de energia renovable que podrian contribuir al desarrollo sustentable de Mexico, por esto se arguye sobre las principales fuentes de energia renovable en Mexico -energia solar, eolica, minihidraulica, biomasa y geotermia-, sobre su desarrollo y evolucion, costo, proyectos de insercion y obstaculos para su correcto desarrollo en ese pais.

  13. Estimated market prices of electric energy: agroenergy cooperative case study: NERAM (Model for Electric Power Enterprise in Isolated Communities in the Amazon - NERAM) Project; Estimativa do preco de comercializacao da energia eletrica - estudo de caso: cooperativa de agroenergia - Projeto NERAM (Modelo de Negocio de Energia Eletrica em Comunidades Isoladas na Amazonia)

    Energy Technology Data Exchange (ETDEWEB)

    Pedreira, Adriana Coli; Souza, Rubem Cesar Rodrigues; Xavier, Diogo Jackson Cajueiro; Freitas, Katriana Tavares de [Universidade Federal do Amazonas (CDEAM/UFAM), Manaus, AM (Brazil). Centro de Desenvolvimento Energetico Amazonico], Email: cdeam@ufam.edu.br

    2006-07-01

    The objective of this article is to estimate the cost of commercialization of the electricity generated from the acai seeds, under different commercial societies, namely agricultural cooperative, cooperative for rural electrification and independent producer of electricity. In the case of cooperative agriculture, the main products would be the acai pulp, among others, while the electricity would be a sub product resulting from the utilization of the residues from the process. For the other two arrangements, the electricity would be the main product, with differences in fees, taxes and financial structure between them. The taxes and fees associated with each one of the societies are considered for the estimates of energy costs. The results are presented as a variation of the electricity costs (Reais/MWh) over the load factor variation and are compared to the prices practiced for the bulk energy market for the independent producer in the Amazon region. All the results are presented with and without the subsidy for electricity. This study is part of the mark of the project {sup M}odel for Electric Power Enterprise in Isolated Communities in the Amazon - NERAM{sup ,} financed by the National Council for Scientific and Technological Development - CNPq, that contemplates the universal access to electric-power services and the idea of Integrated Planning of Resources (PIR) for isolated systems. The results appear for the need of subsidies and they present smaller costs for the sceneries that use the cooperatives, especially the cooperative of rural electrification. (author)

  14. Improvement of the electric power sector through the access to the national power transmission system - SINTREL (Brazilian National System of Electric Power Transmission); Aperfeicoamento do setor de energia eletrica atraves do acesso a transmissao - SINTREL (Sistema Nacional de Transmissao de Energia Eletrica)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-04-01

    This report presents the organization and the operation of SINTREL (Brazilian National System of Electric Power Transmission), the national power transmission system, and it defines its function in the process of reform of the Brazilian electric sector. Besides showing the traditional organization of the companies and of the electric system, and the evolution of the organization of the Brazilian electric system to favor the competition.

  15. 77 FR 49789 - Record of Decision for Issuing a Presidential Permit to Energia Sierra Juarez U.S. Transmission...

    Science.gov (United States)

    2012-08-17

    ... Energia Sierra Juarez U.S. Transmission, LLC, for the Energia Sierra Juarez U.S. Transmission Line Project...: Record of Decision (ROD). SUMMARY: DOE announces its decision to issue a Presidential permit to Energia... analyzed in the Environmental Impact Statement for the Energia Sierra Juarez U.S. Transmission Line Project...

  16. Standardization for electric energy saving; Normalizacion para el ahorro de energia electrica

    Energy Technology Data Exchange (ETDEWEB)

    Reyes Diaz, Arturo [Fideicomiso de Apoyo al Programa de Ahorro de Energia del Sector Electrico (FIDE), Mexico, D. F. (Mexico)

    1994-12-31

    This work describes shortly the current legislation on the standardization; as well as the participation of the entities Fideicomiso de Apoyo al Programa de Ahorro de Energia del Sector Electrico (FIDE) and Programa de Ahorro de Energia (PAESE) in the consulting committees, for the elaboration of the Mexican official standards focussed to electric power saving. [Espanol] El presente trabajo, describe brevemente la legislacion actual sobre la normalizacion; asi como la participacion de las entidades Fideicomiso de Apoyo al Programa de Ahorro de Energia del Sector Electrico (FIDE) y Programa de ahorro de Energia (PAESE) en los comites consultivos, para la elaboracion de normas oficiales mexicanas enfocadas al ahorro de energia electrica.

  17. Fundamentos sobre energia das ondas (e sistemas fotovoltaicos para bombagem de água)

    OpenAIRE

    Carneiro, Joaquim A. O.

    2017-01-01

    Texto de apoio às aulas da UC "Energias Renováveis II" do Mestrado em Ciências e Tecnologias do Ambiente Devido ao crescente aumento do consumo energético, os últimos anos têm sido caracterizados por uma aposta estratégica na procura de fontes de energia alternativas aos combustíveis fósseis tradicionais. Este documento aborda os principais fundamentos adstritos a dois diferentes tipos de fontes alternativas de energia, nomeadamente a energia das ondas do oceano e a energia solar fotovolta...

  18. Avaliação da conversão da energia fotovoltaica em sistemas isolados

    OpenAIRE

    Carneiro de Oliveira, Kleber

    2007-01-01

    Esta dissertação apresenta a importância do uso da energia solar fotovoltaica em relação ao impacto ambiental causado pelas fontes de energia convencionais. O fato da energia solar fotovoltaica ser uma energia livre de poluentes e crescente devido à diminuição dos preços dos painéis fotovoltaicos a deixa em condições de competir com as outras fontes de energia. São apresentados aspectos gerais sobre geração fotovoltaica e são discutidos o princípio de funcionamento, o processo ...

  19. Standardization for electric energy saving; Normalizacion para el ahorro de energia electrica

    Energy Technology Data Exchange (ETDEWEB)

    Reyes Diaz, Arturo [Fideicomiso de Apoyo al Programa de Ahorro de Energia del Sector Electrico (FIDE), Mexico, D. F. (Mexico)

    1993-12-31

    This work describes shortly the current legislation on the standardization; as well as the participation of the entities Fideicomiso de Apoyo al Programa de Ahorro de Energia del Sector Electrico (FIDE) and Programa de Ahorro de Energia (PAESE) in the consulting committees, for the elaboration of the Mexican official standards focussed to electric power saving. [Espanol] El presente trabajo, describe brevemente la legislacion actual sobre la normalizacion; asi como la participacion de las entidades Fideicomiso de Apoyo al Programa de Ahorro de Energia del Sector Electrico (FIDE) y Programa de ahorro de Energia (PAESE) en los comites consultivos, para la elaboracion de normas oficiales mexicanas enfocadas al ahorro de energia electrica.

  20. Renewable energy and technological development; Energia renovable y desarrollo tecnologico

    Energy Technology Data Exchange (ETDEWEB)

    Covarrubias Ramos, Rogelio [Fideicomiso para el ahorro de energia, (Mexico)

    2007-06-15

    In this presentation is widely described the work carried out by the Trust Fund for Electrical Energy Savings (FIDE) with reference to renewable energy foster. In the first part, it is found the FIDE's mission, which is focused on achieving the efficient use of the energy. Then, there are quiet briefly described the processes -carried out by the FIDE- in favour of the groundbreaking technology that achieves to decrease the energy squandering. In addition, there are mentioned different means boosting the energy savings. Then, there are described the issues the energy system should change in order to improve the actual situation of many Mexicans. There are briefly mentioned not only the environmental but also the social benefits of the use of renewable energy; besides, there are given the necessary elements in order to make it possible. Then, there are explained why the use of renewable energy would be profitable. Finally, it is described the methodology that should be followed in case it is wanted to find sponsors up to 100% for a project related to improvement of the energy production. [Spanish] Esta presentacion describe ampliamente la labor que realiza el Fideicomiso para el ahorro de energia (FIDE) en relacion con el fomento de la energia renovable, asi como el desarrollo de tecnologias que refuercen el uso de este tipo de energia. En la primera parte, se encuentra la mision del FIDE, que se enfoca en lograr que el uso de la energia sea apropiado. Enseguida, de forma breve se describen los procesos que realiza el FIDE en favor de la tecnologia innovadora que haga decrecer el dispendio de energia. Luego, se explican las aspectos endebles del sistema energetico de Mexico. Se describen escuetamente los beneficios, no solo ambientales sino tambien sociales, del uso de energia renovable; ademas, se mencionan los elementos necesarios para que esto pueda lograrse. Mas adelante, se dan las razones por las que para Mexico seria rentable el uso de energia renovable

  1. Renewable energy and technological development; Energia renovable y desarrollo tecnologico

    Energy Technology Data Exchange (ETDEWEB)

    Covarrubias Ramos, Rogelio [Fideicomiso para el ahorro de energia, (Mexico)

    2007-06-15

    In this presentation is widely described the work carried out by the Trust Fund for Electrical Energy Savings (FIDE) with reference to renewable energy foster. In the first part, it is found the FIDE's mission, which is focused on achieving the efficient use of the energy. Then, there are quiet briefly described the processes -carried out by the FIDE- in favour of the groundbreaking technology that achieves to decrease the energy squandering. In addition, there are mentioned different means boosting the energy savings. Then, there are described the issues the energy system should change in order to improve the actual situation of many Mexicans. There are briefly mentioned not only the environmental but also the social benefits of the use of renewable energy; besides, there are given the necessary elements in order to make it possible. Then, there are explained why the use of renewable energy would be profitable. Finally, it is described the methodology that should be followed in case it is wanted to find sponsors up to 100% for a project related to improvement of the energy production. [Spanish] Esta presentacion describe ampliamente la labor que realiza el Fideicomiso para el ahorro de energia (FIDE) en relacion con el fomento de la energia renovable, asi como el desarrollo de tecnologias que refuercen el uso de este tipo de energia. En la primera parte, se encuentra la mision del FIDE, que se enfoca en lograr que el uso de la energia sea apropiado. Enseguida, de forma breve se describen los procesos que realiza el FIDE en favor de la tecnologia innovadora que haga decrecer el dispendio de energia. Luego, se explican las aspectos endebles del sistema energetico de Mexico. Se describen escuetamente los beneficios, no solo ambientales sino tambien sociales, del uso de energia renovable; ademas, se mencionan los elementos necesarios para que esto pueda lograrse. Mas adelante, se dan las razones por las que para Mexico seria rentable el uso de energia renovable

  2. Crise de energia e governança ambiental

    OpenAIRE

    França, Georgeana Barbosa de

    2013-01-01

    Resumo: Este trabalho analisa os processos de transformação territorial ocasionados pela implantação de instrumentos de gestão ambiental que visam a promoção de energia renovável em pequena escala em meios rurais. Esta investigação, que possui foco interdisciplinar, emprega a perspectiva metodológica da Teoria do Ator-Rede. O estudo de caso desta pesquisa é uma iniciativa local para produção de energia renovável em uma comunidade rural do Oeste do Paraná, Brasil. Conduzida por ...

  3. Eesti Energia salajased uuringud / Sulev Vedler, Tarmo Vahter

    Index Scriptorium Estoniae

    Vedler, Sulev, 1970-

    2007-01-01

    Ilmunud ka: Infopress 2. märts nr. 9 lk. 160. Hoitakse salajas Briti konsultatsioonifirma Lexicon Partners poolt koostatud uuringut, mida peaks Eesti riik peale hakkama oma osalusega monopoolses elektriettevõttes Eesti Energia. Majandusminister Edgar Savisaar lasi uuringu ministeeriumisse tuua ning andis juristidele ülesande analüüsida, kui palju saab dokumendist avaldada. Vt. samas: Elektri hind

  4. Energia avastuskeskus = Energy discovery center / Margit Aule ; kommenteerinud Kristiina Raid

    Index Scriptorium Estoniae

    Aule, Margit, 1981-

    2015-01-01

    Energia avastuskeskuse (Põhja pst 29/31, Tallinn) interjöörist ja ekspositsiooni kujundusest. Autor Margit Argus (KAOS Arhitektid); ekspositsiooni kujundus Margit Argus, Margit Aule; arhitektid Sander Aas, Margit Aule, Pelle Sten Viiburg (KAOS Arhitektid). Eesti Sisearhitektide Liidu aastapreemia 2014/2015 parima ajaloolise interjööri eest

  5. Eesti Energia valib Ameerikas tuumajaamale reaktoreid / Andres Reimer

    Index Scriptorium Estoniae

    Reimer, Andres

    2009-01-01

    Eesti Energia liitus rahvusvahelise tuumareaktoriprojektiga IRIS, projekti eesmärk on luua lihtsa konstruktsiooniga, ohutu ja suhteliselt odav reaktor. Jürgen Ligi sõnul saab Eesti oma IRIS-tüüpi tuumajaama juba 2019. aastal. Joonis: Potentsiaalne tuumajaam

  6. Eesti Energia tahab Liivi lahes broneerida hiigeltuulepargid / Raimo Poom

    Index Scriptorium Estoniae

    Poom, Raimo

    2010-01-01

    Eesti Energia taotleb valitsuselt viie ala broneerimist Liivi lahes, et analüüsida seal üle 300 meretuuliku püstitamise võimalikkust. Nende koguvõimsus oleks 1500 MW, Eleringi uuringu kohaselt võiks Eestis probleemideta töötada tuuleparke koguvõimsusega 600 MW

  7. Konverents "Turg. Tööstus. Energia." / T Tiidemann

    Index Scriptorium Estoniae

    Tiidemann, T

    1993-01-01

    Rootsi organisatsioon SWENESCO (Swedish Network of Engineers and Seientists for Conversion - Rootsi inseneride ja teadlaste võrk konversiooni eest) korraldab konverentsi praktilistest kogemustest Rootsi - Eesti tööstuse ja energia tehnikaalastes projektides 18-20 juuni 1993 Pirita Purjespordikeskuses

  8. DOLOČITEV POVRŠINSKE NAPETOSTI Z METODO KAPILARNEGA DVIGA DVOFAZNIH SISTEMOV

    OpenAIRE

    Kravanja, Gregor

    2014-01-01

    Namen magistrske naloge je bil postavitev merilne naprave in razvoj nove metode merjenja površinske napetosti s kapilarnim dvigom dvofaznih sistemov v okolici kritične točke. Za pridobitev natančnih in primerljivih meritev je bilo potrebno poznati natančni notranji premer tankih kapilar. Določili smo ga z metodo laserskega tipanja na nemški koordinatni merilni napravi ZEISS tipa UMC-850 s pomočjo merilne programske opreme CALYPSO 5.1.4. Za merjenje ravnotežne višine smo uporabili računalniški...

  9. Mapa de energia baseado em predição para redes de sensores sem fio

    OpenAIRE

    Raquel Aparecida de Freitas Mini

    2004-01-01

    O objetivo deste trabalho é construir o mapa de energia de uma rede de sensores sem fio utilizando técnicas de predição. Em mapas de energia baseados em predição, cada nó sensor utiliza algoritmos de predição para modelar sua dissipação de energia com o objetivo de prever seu consumo de energia no futuro. Nesta situação, ao invés de enviar para o nó sorvedouro apenas sua quantidade de energia disponível, cada sensor envia também os parâmetros do modelo que descreve seu consumo de energia. O n...

  10. Applications of the renewable energies; Aplicaciones de las energias renovables

    Energy Technology Data Exchange (ETDEWEB)

    Gomez Rocha, Luis Martin [Comision Nacional para el Ahorro de Energia, Mexico, D.F. (Mexico)

    2001-07-01

    The solar energy manifests itself in different forms and its application has been fundamental for the humankind development. These forms are known as renewable energies, since they are energy forms that are renewed or remade with time or that are so abundant on Earth, that they will last for hundreds or thousands of years, either we use them or not. The main advantage of the utilization of the renewable energies in comparison with hydrocarbons is the one of having smaller impact on the environment, which brings about the conservation of nonrenewable resources, and to postpone its exhaustion. They allow the distributed generation, diminishing the power losses in the transmission and distribution systems, which increases the overall efficiency. In addition they can be the drive for regional development and generation of employment, because when having applications in remote zones and being a field still not completely developed in Mexico, the possibility exists of enabling professionals and technicians. From the point of view of the power sector, the renewable energies extend the supply and availability of energy, making more flexible and independent the operation and reliability of the national power system. [Spanish] La energia solar se manifiesta de diversas formas y su aplicacion ha sido fundamental para el desarrollo de la humanidad. A estas formas se les conoce como energias renovables, ya que son formas de energia que se van renovando o rehaciendo con el tiempo o que son tan abundantes en la tierra, que perduraran por cientos o miles de anos, las usemos o no. La principal ventaja del aprovechamiento de las energias renovables en comparacion con los hidrocarburos es la de tener menor impacto al medio ambiente, lo que trae consigo la conservacion de recursos no renovables, y posponer su termino. Permiten la generacion distribuida, disminuyendo las perdidas energeticas en los sistemas de transmision y distribucion, lo que incrementa la eficiencia general. Ademas

  11. Choice and the cost and benefit analysis of one solar system of renewable energy for the Tepozan Park; Seleccion y analisis costo-beneficio de un sistema de energia renovable para el parque Tepozan

    Energy Technology Data Exchange (ETDEWEB)

    Lopez P, J. Manuel A; Sheinbaum P, Claudia [Instituto de Ingenieria de la UNAM, Mexico, D. F. (Mexico)

    2000-07-01

    This article is about the choice process and the cost and benefit analysis of one solar photovoltaic system for the Tepozan Park, which is a space of ecoturism and ecological education, it is at the Tlalpan District in Mexico, D.F. According to this objective, we start with an introduction related to general conditions in the Park and we talk about the energy requirement. Next, the method for the better option choice is shown, this is based on decision analysis of Kepner and Tregoe. The choice option is evaluated according to the main financial tools of the Cost and Benefit Analysis private evaluation. This shows the decision analysis including issued about ecology. Finally, we add a point for the result synthesis, so we can have a complete approach in order to choice a renewable energy. As conclusion is shown the most important costs and benefits, thinking on future decisions about operation and maintenance of the system. [Spanish] En este articulo se presenta el proceso de seleccion y analisis Costo-Beneficio de un sistema de energia solar fotovoltaica para las instalaciones del Parque Tepozan, un espacio de ecoturismo y educacion ambiental, ubicado en la delegacion Tlalpan de Mexico, D.F. Para ello, se da una introduccion de las condiciones generales del parque y de los requerimientos de energia. Posteriormente se presenta un apartado del metodo para la seleccion de la alternativa mas adecuada, sustentado en un analisis de decisiones. La alternativa seleccionada, se somete a una evaluacion de los principales criterios de la evaluacion privada derivada del Analisis Costo Beneficio, con lo que se ilustra el proceso de toma de decision, incluyendo los factores de impacto ambiental. Finalmente, se incorpora un apartado de sintesis de resultados, para aportar un panorama completo en cuanto a la operacion y mantenimiento del sistema dentro del parque.

  12. Analüütikud soovitavad Eesti Energia börsile viia / Piret Reiljan

    Index Scriptorium Estoniae

    Reiljan, Piret, 1983-

    2008-01-01

    Kohalikud analüütikud soovitavad viia Eesti Energia börsile, kuna see elavdaks aktsiaturgu ja tõmbaks ligi välisinvestoreid. Vt. samas: Raivo Vare: raske aeg töötab Eesti Energia börsiletoomise kasuks; Analüüs ootab pääsu valitsuskabinetti; Juhid ei püsi enam Eesti Energias. Diagrammid: Majandusnäitajad; Varade maht

  13. Asjatundja soovitab Eesti Energia kiiresti börsile viia / Tiit Nigul ; interv. Andrus Karnau

    Index Scriptorium Estoniae

    Nigul, Tiit

    2008-01-01

    Eesti Energia endine juhatuse liige vastab küsimustele, mis puudutavad riigi energiapoliitikat ja -varustust, elektrienergia hinnatõusu, energiafirma börsileminekut, tasakaalu konkurentsiameti ja Eesti Energia vahel, ettevõtte tulusid, Narva Elektrijaamade tootmisvõimsust, koostööd Leedu tuumajaama projektiga, elektriturgu, ettevõtja Urmas Sõõrumaa süüdistamist siseinfo kasutamises, Eesti Energia strateegilist eesmärki saavutada aastaks 2015 kaks miljonit klienti

  14. L'energia nuclear: pot resoldre el problema de l'escalfament global?

    OpenAIRE

    Puig, Josep

    2006-01-01

    Sovint es diu que l'energia nuclear pot ser la solució pel problema de l'escalfament global: l'article presenta dades i raonaments per concloure que, si tota l'electricitat mundial fos d'origen nuclear, l'escalfament global es reduiria tan sols en un 12%. També s'analitzen els subproductes militars de la indústria de l'energia nuclear "civil" i la problemàtica dels residus radioactius de l'energia nuclear de fissió. També s'analitza l'alt grau de dificultats que presenta l'energia nuclear de ...

  15. Kätega ravimine ehk me kõik oleme energia / Kerttu Soans

    Index Scriptorium Estoniae

    Soans, Kerttu, 1961-

    2011-01-01

    Erinevatest energia vahendamisel põhinevatest psühhotehnikatest ja ravimeetoditest: reiki, Silva ultra, maagiline maatriks ehk MM, elektromagnetvälja tasakaalustamise tehnika EMF, kvantpuudutus, bioenergeetika

  16. Geração de energia a partir das ondas do mar

    OpenAIRE

    Grilo, Diogo Dinis

    2013-01-01

    Dado o aumento do consumo de energia e a necessidade de reduzir as emissões de poluentes para a atmosfera, o presente trabalho visa propor uma solução de produção de energia limpa a partir das ondas do mar. O objetivo desta dissertação é criar um sistema alternativo de conversão da energia cinética proveniente das ondas do mar em energia elétrica, tendo como ponto de partida o projeto do sistema pendular SEAREV. Numa primeira fase foi realizada uma análise dos sistemas de co...

  17. Paradigmas da energia solar no Brasil e no mundo

    OpenAIRE

    da Cunha Kemerich, Pedro Daniel; Balestrin Flores, Carlos Eduardo; de Borba, Willian Fernando; Borth da Silveira, Rafael; Rodrigues França, Jacson; Levandoski, Natalie

    2016-01-01

    Com o aumento gradativo da população e dos padrões de consumo da sociedade atual, os debates envolvendo as questões energéticas estão sendo cada vez mais frequentes. A base energética do Brasil gira em torno das hidrelétricas, visto que o país possui uma ótima disponibilidade hídrica. Com a escassez dos recursos não renováveis causado pelo consumo desenfreado, voltam-se os olhos para as fontes de energias renováveis, dentre elas destaca-se a energia solar. Com isso o presente estudo teve por ...

  18. O espaço da energia nuclear no Brasil

    Directory of Open Access Journals (Sweden)

    Joaquim Francisco de Carvalho

    2012-01-01

    Full Text Available Este artigo repassa a história e descreve a experiência acumulada em energia nuclear no Brasil, mostrando que as aplicações biomédicas, industriais e agrícolas desenvolveram-se bem no país, a partir dos anos 1950. Em seguida, o artigo demonstra que o país pode cobrir seu consumo de energia elétrica apenas com fontes renováveis de energia, sem recorrer a usinas nucleares de potência. Por fim, são analisados os argumentos comuns na imprensa, a favor e contrários às centrais nucleares, e são discutidos alguns aspectos comerciais e políticos do problema. São também examinadas as estratégias de vendas da indústria nuclear no Brasil.This article reviews the history and describes the experience on nuclear energy in Brazil, showing that nuclear technology applied to biomedical sciences, industry and agriculture has been largely developed in this country, from the year 1950 on. Then the paper shows that Brazil can cover its electricity consumption with only renewable energy sources, without nuclear power plants. Finally the arguments usually employed in the press, pro and against nuclear power plants are analyzed and some commercial and political aspects of the problem are commented. The sales strategy of the nuclear industry in Brazil is also commented.

  19. Correlacion entre metodos de analisis de Zn disponible en cuatro ordenes de suelos de Costa Rica

    Directory of Open Access Journals (Sweden)

    Eloy Molina

    2001-01-01

    Full Text Available Se realizo una comparación entre métodos analisis del Zn disponible en 4 ordenes de sue- Analytilos de Costa Rica (Ultisoles, Vertisoles, Andisoles Inceptisoles, 25 de c/u, utilizando las siguientes soluciones extractoras: Olsen Modificado, Meh- lich 3, Morgan Modificado, DTPA y HC1. Las cantidades de Zn extrafdas dependieron de la natu- raleza qufmica de la solucion extractora. El HCl presento los contenidos mas altos de Zn en los chasuelos, excepto en Vertisoles. Las soluciones que hicontienen el agente quelante EDTA (Olsen Modi- ficado y Mehlich`3, extrajeron niveles interme- Modidios de Zn, en tanto que los metodos que contie- Den el quelato DTPA (Morgan Modificado y DT - PA, obtuvieron los valores mas bajos. Las corre- laciones de Zn extrafble entre los 5 metodos fue- signifirOD significativas en la mayona de los casos, tanto nivel de orden de suelos como en el conjunto de indivilos 100 suelos analizados. Los coeficientes de co- rrelacion mas altos, se presentaron entre Mehlich Morgan Modificado y DTPA. Las correlaciones Modifueron consistentes en los 4 ordenes, 10 que indica que estas soluciones poseen un amplio margen de adaptacion a diferentes tipos de suelo, siendo una caractenstica ventajosa para la selección de un metodo de analisis. El Olsen Modificado fue mas slighteficiente para la extraccion de Zn en suelos de pH ligeramente acido 0 neutro (Vertisoles e Inceptiso- les, que en suelos acidos (Ultisoles y Andisoles. EI HCI extrajo cantidades muy aItas de Zn que Moraparentementestan relacionadas con formas no disponibles para lag plantas. Se concluye que lag soluciones Mehlich 3, Morgan Modificado y DT - PA son semejantes en la forma de extraer Zn dispo- Dible, y podrian seT una altemativa para sustituir el metoda tradicional de Olsen Modificado utilizado en Costa Rica. Sin embargo,la eficiencia de ellas no puede seT establecida sino a traves de log estudios de correlacion contra rendimiento en invernadero y campo.

  20. Eesti Energia senine juhatus jätkab veel vähemalt aasta / Anneli Ammas, Toivo Tänavsuu

    Index Scriptorium Estoniae

    Ammas, Anneli, 1962-

    2005-01-01

    Eesti Energia nõukogu otsustas jätta ettevõtte juhatuse veel aastaks ametisse, juhikonkursi korraldamise kohta otsust ei langetatud. Nõukogu liikmete kommentaare. Lisa: Eesti Energia kasvatas eksporti

  1. Energy of our planet; La energia de nuestro planeta

    Energy Technology Data Exchange (ETDEWEB)

    Torres Alvarado, Ignacio; Santoyo Gutierrez, Edgar [Centro de Investigacion en Energia (CIE) de la UNAM, Temixco, Morelos (Mexico)

    2010-07-01

    The total heat flowing from the Earth's interior to the surface is estimated at {approx}42 TW (1012 watts) of which 19% comes from the crust, the 76% comes from the mantle and the 5% comes from the nucleus. The ability to drive the heat of the rocks is very low, causing the need of hundreds of millions of years to exhaust this energy resource. Based on the properties of the renewable heat flow and the long geological times required for its exhaustion, the Earth energy is considered by many scientists as a source of inexhaustible renewable energy, and by its natural availability in all parts of our planet, perhaps the best distributed, together with solar energy. One of the most important advantages of geothermal energy is that its energy can be used not only to generate electric power, but in a large number of applications or direct uses: the heating of buildings, greenhouses or incubators; aquaculture; in various industrial processes (drying products, food packaging, paper manufacturing, chemicals, etc.); balneology for recreational purposes and medicines, and many other applications. In fact, geothermal applications can be integrally one after another or in processes in cascade to fully utilize its energy content. [Spanish] El calor total que fluye del interior de la Tierra hacia la superficie se estima en {approx}42 TW (1012 watts) del cual 19% proviene de la corteza, el 76% proviene del manto y el 5% proviene del nucleo. La capacidad para conducir el calor de las rocas es muy baja, lo que ocasiona que se necesiten cientos de millones de anos para agotar este recurso energetico. Basado en las propiedades renovables del flujo de calor y los largos tiempos geologicos requeridos para su agotamiento, la energia de la Tierra es considerada por muchos cientificos como una fuente de energia renovable, practicamente inagotable, y por su disponibilidad natural en todo nuestro planeta, quizas la mejor distribuida, junto con la energia solar. Una de las ventajas mas

  2. Eesti Energia nõukogu liikmed Jaotusvõrgu hinnatõusutaotlust kommenteerima ei kipu / Katre Pilvinski

    Index Scriptorium Estoniae

    Pilvinski, Katre

    2010-01-01

    Eesti Energia nõukogu liige Kalle Palling kommenteerib peaminister Andrus Ansipi öeldut, et Eesti Energia investeeringud tuleb üle vaadata. Nõukogu liikme Rein Kilgi sõnul tunduvad talle rünnakud Eesti Energia vastu ülekohtused

  3. Roheline energia läheb müüki topelthinnaga / Ervin Soon

    Index Scriptorium Estoniae

    Soon, Ervin

    2001-01-01

    Eesti Energia on märtsi keskel käivitanud Rohelise Energia kampaaniaga leidnud võtte, kuidas kaks korda kõrgema elektri müügihinnaga katta alternatiivenergia kohustusliku kokkuostu järjest kasvavaid kulusid

  4. Eesti Energia kärpis elektrihinna tõusu / Aivar Reinap

    Index Scriptorium Estoniae

    Reinap, Aivar, 1968-

    2004-01-01

    Ilmunud ka: Põhjarannik, 13. veebr. 2004, lk. 1. Eesti Energia nõukogu otsustas vähendada taotletavat elektrienergia hinnatõusu 15%ni ja lükkas hinnapakettide lõpliku kinnitamise edasi nädala võrra. Riigikogu ja Eesti Energia nõukogu liikme Janno Reiljani arvamus

  5. Eesti Energia börsile! Argus riputaks ta meile kiviks kaela / Raimo Poom

    Index Scriptorium Estoniae

    Poom, Raimo

    2010-01-01

    Eesti Energia võimalikust börsileviimisest. Autori sõnul poleks börsikavagi täieliku riskita, peaküsimus võib hakata puudutama nn. rahvaaktsia kava. Kõige halvem oleks Eesti Energia puhul otsustamatus

  6. Eesti Energia juhi küsimus jäi ajapuudusel lahendamata / Villy Paimets

    Index Scriptorium Estoniae

    Paimets, Villy, 1972-

    2005-01-01

    Eesti Energia nõukogu jättis otsustamata, kas ettevõtte juhatuse esimehe kohale kuulutatakse välja avalik konkurss. Vt. samas: Oki valulaps on elektri hind; Kronoloogia: Eesti Energia on Gunnar Oki juhtimisel kõvasti kosunud

  7. Projecte d'implantació d'energia solar fotovoltaica al municipi d'Albanyà

    OpenAIRE

    Molins i Galas, Albert

    2008-01-01

    Disseny d’una instal·lació d’energia solar fotovoltaica per als edificis públics del municipi d’Albanyà (Alt Empordà) per connectar-la a la xarxa i amb un estudi sobre la substitució dels actuals fanals de l’enllumenat públic per fanals alimentats amb energia solar fotovoltaica

  8. Eesti Energia ekstöötaja asutas konkureeriva firma / Toivo Tänavsuu

    Index Scriptorium Estoniae

    Tänavsuu, Toivo

    2006-01-01

    OÜ Baltic Energy Partners (BEP) üks omanikke on endine Eesti Energia teeninduse hulgivaldkonna juht Peeter Pikk. BEP hakkab tegutsema ühena Eesti elektrisüsteemi bilansihalduritest. Eesti Energia ostis Skandinaavia elektribörsi Nord Pool maaklerfirma Solidus OY

  9. Ülikoolihõnguline personalikoolitus Eesti Energias / Annika Kaseorg ; küsitlenud Kadri Kiigema

    Index Scriptorium Estoniae

    Kaseorg, Annika

    2007-01-01

    Eesti Energia alustatud uuest projektist "Nädalalõpu Ülikool" räägib Eesti Energia Jaotusvõrgu personali arendamise projektijuht Annika Kaseorg. Avaseminaril tegi ettekande töövõime säilitamisest TLÜ terviseteaduste ja spordi teaduskonna dekaan Kristjan Port

  10. Energia Renovable para Centros de Salud Rurales (Renewable Energy for Rural Health Clinics)

    Energy Technology Data Exchange (ETDEWEB)

    Jimenez, T.; Olson, K.

    1999-07-28

    Esta es la primera de una serie de guias de aplicaciones que el Programa de Energia de Villas de NREL esta comisionando para acoplar sistemas comerciales renovables con aplicaciones rurales, incluyendo agua, escuelas rurales y micro empresas. La guia esta complementada por las actividades de desarrollo del Programa de Energia de Villas de NREL, proyectos pilotos internacionales y programas de visitas profesionales.

  11. Osservazioni sul principio di legalità come idea e come metodo nell’esperienza giuridica della Chiesa

    Directory of Open Access Journals (Sweden)

    Beatrice Serra

    2012-10-01

    SOMMARIO: 1. Introduzione - 2. – La struttura essenziale del concetto di legalità e la sua realizzazione radicale nel diritto della Chiesa. - 3. L’idea di legalità come “regola che sta prima” nel ius commune e la sua coesistenza con un approccio empirico, essenzialmente giurisprudenziale e dottrinale, di costruzione del diritto. Il principio di legalità come metodo di produzione del diritto nel pensiero giuridico moderno- 4. Il legame storico-concettuale fra il principio di legalità e i Codici moderni - 5. Il Codex iuris canonici del 1917 e il principio di legalità come metodo di costruzione del ius ecclesiae in funzione della certezza del diritto - 6. (segueUlteriori riflessi della prima codificazione canonica sul principio di legalità.:

  12. TTÜ energia- ja sisekliimalabor : energiasääst passiivse arhitektuurilise jahutuse ja/või küttemeetodite kavandamise abil / Hendrik Voll, Teolan Tomson

    Index Scriptorium Estoniae

    Voll, Hendrik, 1980-

    2010-01-01

    TTÜ ehitusteaduskonna kütte ja ventilatsiooni õppetoolis valmis energia- ja sisekliima labor, mille spetsiaalsed päikesekiirguse ja hajuvalguse stendid aitavad inseneridel ja arhitektidel parandada energiasimulatsiooniprogrammide kasutusoskusi

  13. Avaliação económica de um investimento em geração de energia das ondas e energia solar térmica

    OpenAIRE

    Nunes, Ruben Fernando Lopes

    2012-01-01

    O presente trabalho tem como objectivo efectuar a avaliação económica e determinar a viabilidade com e sem os incentivos fiscais de duas tecnologias de conversão de duas fontes distinta e emergentes de energia renovável, o Concentrador Cilindro-parabólico e a Torre Solar para a energia solar termoeléctrica e a Coluna de Água Oscilante e o Pelamis para a energia das ondas. Realiza-se uma curta abordagem à energia Solar e à energia dos Oceanos, e às tecnologias existentes para estes tipos de en...

  14. Api Energia IGCC plant is fully integrated with refinery

    Energy Technology Data Exchange (ETDEWEB)

    Del Bravo, R. [api Energia, Rome (Italy); Trifilo, R. [ABB Sadelmi, Milan (Italy); Chiantore, P.V. [api anonima petroli Italiania Spa, Rome (Italy); Starace, F. [ABB Power Generation, Baden (Switzerland); O`Keefe, L.F. [Texico, White Plains (United States)

    1998-06-01

    The api Energia integrated gasification combined cycle (IGCC) plant being built at Falconara Marittima, on Italy`s Adriatic coast, is one of the three IGCC plants under construction in Italy following the liberalization of the electricity production sector. The plant will take 59.2 t/h of high sulphur heavy oil produced by the Falconara refinery, convert it to syngas and use the gas to generate 280 MW of electricity, plus steam and other gases for use in the refinery. The IGCC plant will be highly integrated into the refining process, with a large number of interchanges between the IGCC unit and the rest of the refinery. (author)

  15. Minema kupatatud nõukoguliikmed: Eesti Energia projektid kukkusid läbi / Dannar Leitmaa

    Index Scriptorium Estoniae

    Leitmaa, Dannar, 1982-

    2011-01-01

    Majandus- ja kommunikatsiooniminister Juhan Parts otsustas Eesti Energia nõukogu liikme kohalt tagasi kutsuda Aivar Reiviku ning Rein Kuusmiku, kes olid vastu Eesti Energia üle viie miljoni euro suurusele investeeringule Weroli rapsiõlitehase juurde rajatavasse elektri- ja küttejaama. Uuteks nõukogu liikmeteks said Andres Saame ja Toomas Tauts. Majandus- ja kommunikatsiooniministeerium peab tagandatud nõukoguliikmete väiteid, et Eesti Energia juhtkond käitub omanikust riigiga omatahtsi ja peab endiselt plaani siirduda börsile, absurdiks. Ministeerium: ei mingit IPO-t

  16. Development of a chromatographic method for the study of the stability and compatibility of Mexican fuel oils; Desarrollo de un metodo cromatografico para el estudio de estabilidad y compatibilidad de combustoleos mexicanos

    Energy Technology Data Exchange (ETDEWEB)

    Blass Amador, Georgina; Panama Tirado, Luz Angelica [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1992-11-01

    compatibility of fuel oil mixes. [Espanol] En Mexico, la mayoria de la energia electrica producida proviene del uso de combustibles residuales pesados conocidos como combustoleos los cuales han sufrido disminuciones en la calidad debido a una combinacion de factores, entre los que destaca el de los cambios en el proceso de refinacion. Es necesario desarrollar metodos que sean capaces de indicar la inestabilidad (formacion de sedimento o incremento en viscosidad durante el almacenamiento o calentamiento) o incompatibilidad (formacion de sedimento al mezclar dos o mas) de los combustoleos utilizados en las centrales termoelectricas. El objetivo de este trabajo fue el desarrollar una prueba alternativa para el estudio de la compatibilidad y/o estabilidad de combustoleos mexicanos empleando cromatografia de liquidos de alta resolucion (CLAR) y asi poder determinar aspectos estructurales del combustoleo que determinan su estabilidad. Dado que la formacion de sedimentos ocurre cuando el poder disolvente del combustible es inadecuado para mantener los asfaltenos en solucion, es importante conocer la medida del poder disolvente o aromaticidad del diluyente; asi pues, la primera parte de este trabajo se centro en la determinacion del perfil de compuestos aromaticos de los diluyentes de los combustoleos, la otra parte se dedico a la determinacion del perfil de distribucion de los pesos moleculares de los asfaltenos presentes en los combustoleos. Los perfiles de la fraccion aromatica, asi como los de distribucion de pesos moleculares se determinaron empleando cromatografia de liquidos, en la que se empleo una variedad de columnas y de disolventes. Se efectuo una combinacion de pruebas de rutina tales como contenido de asfaltenos, equivalencia de tolueno, viscosidad, etcetera con el fin de obtener correlaciones con el metodo cromatografico desarrollado. En este articulo se discute solo la seccion correspondiente a la obtencion del perfil de contenidos de aromaticos de los combustoleos. Se

  17. Estudio numerico y experimental del proceso de soldeo MIG sobre la aleacion 6063--T5 utilizando el metodo de Taguchi

    Science.gov (United States)

    Meseguer Valdenebro, Jose Luis

    improvement on mechanical properties in aluminum metal joint. Los procesos de soldadura por arco electrico representan unas de las tecnicas mas utilizadas en los procesos de fabricacion de componentes mecanicos en la industria moderna. Los procesos de soldeo por arco se han adaptado a las necesidades actuales, haciendose un modo de fabricacion flexible y versatil. Los resultados obtenidos numericamente en el proceso de soldadura son validados experimentalmente. Los principales metodos numericos mas empleados en la actualidad son tres, metodo por diferencias finitas, metodos por elementos finitos y metodo por volumenes finitos. El metodo numerico mas empleado para el modelado de uniones soldadas, es el metodo por elementos finitos, debido a que presenta una buena adaptacion a las condiciones geometricas y de contorno ademas de que existe una diversidad de programas comerciales que utilizan el metodo por elementos finitos como base de calculo. Este trabajo de investigacion presenta un estudio experimental de una union soldada mediante el proceso MIG de la aleacion de aluminio 6063-T5. El metodo numerico se valida experimentalmente aplicando el metodo de los elementos finitos con el programa de calculo ANSYS. Los resultados experimentales obtenidos son: las curvas de enfriamiento, el tiempo critico de enfriamiento t4/3, geometria del cordon, microdurezas obtenidas en la union soldada, zona afectada termicamente y metal base, dilucion del proceso, areas criticas intersecadas entre las curvas de enfriamiento y la curva TTP. Los resultados numericos son: las curvas del ciclo termico, que representan tanto el calentamiento hasta alcanzar la temperatura maxima y un posterior enfriamiento. Se calculan el tiempo critico de enfriamiento t4/3, el rendimiento termico y se representa la geometria del cordon obtenida experimentalmente. La zona afectada termicamente se obtiene diferenciando las zonas que se encuentran a diferentes temperaturas, las areas criticas intersecadas entre las

  18. Atlas de aves: Un metodo para documentar distribucion y seguir poblaciones

    Science.gov (United States)

    Robbins, C.S.; Dowell, B.A.; Dawson, D.K.; Alvarez-Lopez, Humberto; Kattan, Gustavo; Murcia, Carolina

    1988-01-01

    Los Atlas de Aves son proyectos nacionales o regionalies para trazar en mapas la distribucion en reproduccion de cada especie de ave. Ese procedimiento se esta usando en Europa, Australia, Nueva Zelanda, Norteamerica, y partes de Africa. El tama?o de los cuadrados varia de medio grado de latitud y Iongitud hasta 5 x 5 km. El trabajo de campo de cada proyecto exige aproxlmadamente cinco a?os, pero los aficionados pueden llevar a cabo la mayor parte del trabajo. Es posible almacenar los resultados en un computador personal. Hay muchos beneficios: (I) se presenta la distribucion corriente de las aves de la nacion, del estado, o de la Iocalidad; (2) se desarrolla nueva informacion especialmente sobre especies raras o en peligro; (3) se descubren areas que tienen una avlfauna sobresaliente o habitats raros y ayuda a su proteccion, (4) se documentan cambios de dlstribucion; (5) se pueden usar para documentar cambios de poblacion, especialmente en los tropicos donde otros metodos son mas dificiles de usar porque hay muchas especies y no hay muchos observadores calificados en la identificacion de sonidos de las aves; (6) son proyectos buenos de investigacion para estudiantes graduados; (7) los turistas y los jefes de excursiones de historia natural pueden contribuir con muchas informaciones

  19. Energia solar no tratamento de corante têxtil

    Directory of Open Access Journals (Sweden)

    Viviane Farias Silva

    2014-10-01

    Full Text Available As indústrias utilizam a água em todo o seu processo, desperdiçando enormes volumes de água gerando efluentes com altos índices de produtos químicos, precisando de tratamento para ser reutilizado ou lançado no meio ambiente. Nesse contexto, o presente trabalho foi realizado no Laboratório de Engenharia Ambiental e de Qualidade na Universidade Federal de Pernambuco objetivando-se a degradação de corante utilizados nas indústrias têxtis através do uso da energia solar como alternativa de tratamento de efluente. Nesta pesquisa os testes fotocatalíticos foram realizados com o catalisador em pó (TiO2 - P25, contendo o corante têxtil Remazol Amarelo Ouro RNL (RGY ou sem catalisador nos testes de fotólise. Foram testados dois tipos de radiação, a artificial e a energia solar (natural. Para avaliar a descoloração e a degradação das amostras, a Espectroscopia UV-visível foi a principal técnica analítica empregada como também realizadas análises de Carbono Orgânico Total (COT e Demanda Química de Oxigênio (DQO. Nas 6 (seis analises realizadas obteve-se um elevado índice de remoção da cor do corante, superior a 97%, com alta eficiência do processo com uma significativa redução da COT e da DQO. Os métodos utilizados foram eficientes na descoloração do RGY, como também na sua degradação, tornando-se uma técnica inovadora com o uso da energia solar para o tratamento de efluentes têxteis.Palavras-chave: efluente industrial, alternativa sustentável, degradação do remazol amarelo ouro, descoloração de efluente

  20. Eesti Energia korraldas OSELCA projekti raames Tallinnas rahvusvahelise seminari / Reigo Lehtla

    Index Scriptorium Estoniae

    Lehtla, Reigo

    2005-01-01

    Eesti Energia AS korraldas 12.-13. septembrini 2005. a. Tallinna Tehnikaülikooli energeetikahoones rahvusvahelise seminari olelusringi hindamise (Life Cycle Assessment) metoodika hetkeseisust Ida-Euroopa regioonis

  1. Energia ja sisekliima labor aitab parandada arhitektide ja inseneride koostööd / Hendrik Voll

    Index Scriptorium Estoniae

    Voll, Hendrik, 1980-

    2010-01-01

    TTÜ ehitusteaduskonna kütte ja ventilatsiooni õppetoolis valmis energia ja sisekliima labor, mille spetsiaalsed päikesekiirguse ja hajuvalguse stendid aitavad inseneridel ja arhitektidel parandada energiasimulatsiooniprogrammide kasutusoskusi

  2. The Ciudad Universitaria and the energy; La ciudad universitaria y la energia

    Energy Technology Data Exchange (ETDEWEB)

    Arriola Valdes, Eduardo; Villanueva Moreno, Carlos; Alvarez Watkins, Pablo [Universidad Nacional Autonoma de Mexico (UNAM), Mexico, D.F. (Mexico)

    2006-08-15

    The fundamental intention of the macro project La Ciudad Universitaria y la Energia is to turn to the university campus of the Universidad Nacional Autonoma de Mexico (UNAM) into a model of intelligent use of the different necessary forms of energy for the satisfaction of its necessities. In order to do so, the macro project is sustained in six lines of investigation and development: Solar energy, energy from biomass; hydrogen energy; diagnosis and energy saving; use and energy saving; and energy culture. The macro project is framed in an effort of the UNAM to foment the trans-disciplinary collaboration and therefore, under the coordination of the Faculty of Engineering the following university dependencies participate in this persistence: Faculty of Sciences; Faculty of Chemistry; Faculty of Architecture; Faculty of Accountants and Administration; Faculty of Economy; FES Aragon; Institute of Engineering; Institute of Geophysics; Institute of Physics; Research Center in Energy; Center of Applied Sciences and Technological Development. For that intention, in the period the 2005-2007 the Trans-disciplinary Program in Investigation and Development for Faculties and Schools of the UNAM will contribute with 30 million pesos to the macro project La Ciudad Universitaria y la Energia. [Spanish] El proposito fundamental del macroproyecto La Ciudad Universitaria y la Energia es el convertir al campus universitario de la Universidad Nacional Autonoma de Mexico (UNAM) en un modelo de utilizacion inteligente de las diferentes formas de energia necesarias para la satisfaccion de sus necesidades. Para lograrlo, el macroproyecto se sustenta en las seis lineas de investigacion y desarrollo: Energia solar, energia de biomasa; energia del hidrogeno; diagnostico y ahorro de energia; utilizacion y ahorro de energia; y cultura energetica. El macroproyecto se enmarca en un esfuerzo de la UNAM por fomentar la colaboracion transdisciplinaria y por tanto, bajo la coordinacion de la Facultad

  3. Eesti Energia kuulutas naabritele elektrisõja / Toivo Tänavsuu

    Index Scriptorium Estoniae

    Tänavsuu, Toivo

    2008-01-01

    Eesti Energia plaanib Läti ja Leedu kohtusse anda, kui läbirääkimised ei too lahendust. Sandor Liive peab oluliseks, et EL kehtestaks tollimaksu Vene elektrile. Käimas on lobitöö Põhjamaade elektribörsi laiendamiseks Eestisse 2009. aastast, mis tooks siia avatud turu läbipaistva hinnakujunduse; peetakse reaalseks, et Eesti Energia võib saada äriosaluse kavandatavas Olkiluoto 6. reaktoris. Lisa: Elektri hind võib 1. jaanuarist kahekordistuda

  4. Sustainable alternative for use of waste from pruning deriving from power distribution networks maintenance; Alternativa sustentavel para utilizacao de residuos de poda provenientes da manutencao das redes de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Cortez, Cristiane Lima; Grisoli, Renata; Gavioli, Fabio; Coelho, Suani Teixeira [Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil)], email: cenbio@iee.usp.br; Carmelo, Silma [AES Eletropaulo, Sao Paulo, SP (Brazil)

    2008-07-01

    In the context of the environmental issue, the increasing production of solid residues seems to be a problem due to scarcity of methods and solutions for the management. This article presents a project that has as objective to make a survey of the impacts caused by urban pruning residues generated by the electric energy concessionaire AES Eletropaulo, besides developing a method to standardize this residues composting. The obtained results refer to the observation that 50% of the cities that participated on the survey discard the residues in dumps or sanitary landfills, while only 8% perform composting. In the experimental composting plant built, the organic compound obtained reached satisfactory levels of quality with related to the specifications of minimum quality, but showed that humidity should be better controlled. The feasibility of implementing a composting plant was established, with the exception that the higher the production, the better the return on initial investment. Based in the concepts of environmental and social responsibility, we expect that the conclusion of this work can assist the civil, public and private sectors to contribute with the sustainable development. (author)

  5. Design of an autonomous photovoltaic system for the supply of electric power from a rural residence in Bahia, Brazil; Projeto de um sistema fotovoltaico autonomo para o abastecimento da energia eletrica de uma residencia rural na Bahia

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Isaque da Silva; Cardoso, Gracieli Sartorio; Santoro, Renata Branco [Universidade Federal do ABC, Santo Andre, SP (Brazil)

    2008-07-01

    This paper presents a project to establish one electrical system, isolated by photovoltaic energy, in a residence located approximately 7 km from the town of Barra da Estiva, BA, which do not receive electricity through the transmission system, necessitating generation of electricity on the spot to ensure that this family has some benefits offered by electricity. The scaling was done to two situations: one that serves only the lights and another that allows for a more complete electrification to the region. Meanwhile, the deployment of new technologies in remote places such stocks requires new attitudes and forms of organisations for the adoption, management and maintenance of the system chosen, therefore, social aspects of acceptance of this technology are also discussed. (author)

  6. Analysis of the use of 'standard of housing' criterion in the concession of the social tariff of electric power; Analise do emprego do criterio 'padrao de moradia' na concessao da tarifa social de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Tavares, Mauricio Lopes; Ferreira, Elnatan Chagas; Dias, Jose Antonio Siqueira [Universidade Estadual de Campinas (DEMIC/UNICAMP), SP (Brazil). Fac. de Engenharia Eletrica e de Computacao. Dept. de Eletronica e Microeletronica], Email: siqueira@demic.fee.unicamp.br

    2006-07-01

    The question of the electricity's price policy, referred as social tariff, is usually analyzed in terms of the economic sustainability of its application by the concessionaires of public utilities, responsible for its implementation, vis a vis the biggest possible benefit in social terms. To satisfy both of these conditions, it is necessary to definite the criteria that allows to clearly identify the target population who will receive the benefit. This paper analyzes the use of the criterion of 'housing standard' as a criterion for the implementation of the Social Tariff, contributing for the debate on the definition of the social benefits policy for the low-income consumers of electrical energy, currently under revision. (author)

  7. A proposal for evaluation of the owner capital cost for the Brazilian electric power sector; Uma proposta de avaliacao do custo do capital proprio para o setor de energia eletrica brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Serrano, Ricardo Oliveira L.

    2003-12-01

    This work studies the owner capital cost of the brazilian electric sector, according to three methods: Comparable Accounting Earnings, that uses historical values in its measuring and Discounted Cash Flow (DCF) and the Capital Asset Pricing Model (CAPM), elaborated from the expected values. The obtained results by using the CAE method showed that the Brazilian electric sector has not been rewarded in its real necessity of maintenance and expansion. From this observation, it was considered appropriated not to take this method in the methodology presently proposed, which will be using only the single average of the CAPM and DCF models. The use of the results single average of this model presents the advantage of selecting specific characteristics of each one, and diluting the effects of occasional peak values. The owner capital cost obtained from this work was the average value of 19.73% for the studied period - 1995/2003 (17.12% for 2003), proximate to the obtained result by ANEEL - brazilian agency of electric power - for investments in energy distribution in Brazil, 17.47%, while Minardi and Sanvicente (2003) obtained 36.06% for the owner capital cost of CEMIG in 2002, specifically.

  8. A proposal of cost evaluation of own capital for the Brazilian electric sector; Uma proposta de avaliacao do custo do capital proprio para o setor de energia eletrica brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Serrano, Ricardo Oliveira L.

    2003-12-01

    This work studies the own capital cost of the Brazilian electric sector, by using three methodologies: Comparable Accounting Results (CAR), using historical values for measurement, Discounted Cash Flow (DCF) and the CAPM, elaborated from expected values.The obtained results by using the CAR method indicated that the Brazilian electric power sector is not receiving remuneration according to the real maintenance and expansion necessities. Based on this observation, it was considered appropriated to discard the CAR method in the proposed methodology, therefore using the simply average of the CAPM e DCF models. By using the simply average of the models presents the advantage of capturing specific characteristics of each model, and to dilute effects of eventual extreme values.

  9. Long expansion planning of electrical power availability in Brazil under the real options theoretical approach; Planejamento de longo prazo da expansao da oferta de energia eletrica no Brasil sob uma perspectiva da teoria das opcoes reais

    Energy Technology Data Exchange (ETDEWEB)

    Marreco, Juliana de Moraes

    2007-05-15

    This thesis considers uncertainty on the long term generation expansion planning in the Brazilian Electric System, under a Real Options Approach . First, Real Options Theory is used to demonstrate the importance of thermo power plants insertion in Brazil, through a flexibility valuation on hydrothermal system. This is the first objective of this thesis. In the second part a Real Options Model is proposed to support long term expansion studies, based in a levelized costs analysis. The adequacy of proposed models to real problem is illustrated by a case study of the Brazilian Power System. The results show the importance of the energetic matrix diversification on the Long Term Planning. In the expansion model proposed, results are in favor of higher participation of biomass, nuclear power and coal in Brazilian electricity generation matrix. (author)

  10. Cogeneration of electric power in the sugar and alcohol sectors: registration of the power plants in Sao Paulo, Brazil; Cogeracao de energia eletrica no setor sucroalcooleiro: cadastro das usinas em Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Borges, Gustavo Goncalves [Federacao das Industrias do Estado de Sao Paulo (FIESP), Sao Paulo, SP (Brazil); Moreira, Helemilton Rios; Silva, Edison da [Agencia Reguladora de Saneamento e Energia do Estado de Sao Paulo (ARSESP), SP (Brazil)

    2008-07-01

    One of the major difficult for the planning of co-generation industry of electricity from the sugar cane bagasse is the determination of their true potential. This question comes up, especially in the lack of information about the sugar and ethanol facilities, therefore for the study of potential, we can not just focus on the issue of the cane grinding, but also in technology, the configuration of the power plant and its capacity to export energy. This paper presents a proposal to minimize this difficulty, detailing a solution dedicated to the development of a database for the registration and monitoring of these plants, part of a series of actions regarding in the Understanding Protocol for the promotion of co-generation of bagasse, signed between FIESP and the Government of the State of Sao Paulo. (author)

  11. How and why to retain customers of electric power energy compared to the free market access options; Como e porque fidelizar clientes de energia eletrica face as opcoes de acesso ao mercado livre. As alternativas de uma concessionaria de distribuicao

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Ana Lucia Rodrigues da; Prado Junior, Fernando Amaral de Almeida [Sinerconsult Consultoria Treinamento e Participacoes Ltda., Sao Paulo, SP (Brazil)

    2006-07-01

    This paper discusses the main points of competitive electricity market in Brazil and the utilities challenges. The pro and con's of evasion of customers for the competitive market are evaluated in disco optical. Also are discussed the alternatives for a useful relationship with clients. Practical actions are proposed for the authors for obtaining better benefit/cost relationship and quality improving that induces better quality perception for the client. (author)

  12. Wireless system for location of permanent faults by short circuit current monitoring in electric power distribution network; Sistema wireless para localizacao de faltas permanentes atraves da monitoracao da corrente de curto-circuito em redes de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Machado, A.G.; Correa, A.C.; Machado, R.N. das M.; Ferreira, A.M.D.; Pinto, J.A.C. [Instituto Federal de Educacao, Ciencia e Tecnologia do Para (IFPA), Belem, PA (Brazil)], E-mail: alcidesmachado000@yahoo.com.br; Barra Junior, W. [Universidade Federal do Para (UFPA), Belem, PA (Brazil). Inst. de Tecnologia. Faculdade de Engenharia Eletrica], E-mail: walbarra@ufpa.br

    2009-07-01

    This paper presents the development of an automatic system for permanent short-circuits location in medium voltage (13.8 kV) electric power system distribution feeders, by indirect monitoring of the line current. When a permanent failure occurs, the developed system uses mobile telephony (GSM) text messages (SMS) to inform the power company operation center where the failure most likely took place. With this information in real time, the power company operation center may provide the network restoration in a faster and efficient way. (author)

  13. Potential of exchange of electric power between the electric systems of Brazil and Argentina; Potencial de intercambio de energia eletrica entre os sistemas eletricos do Brasil e da Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Zanette, Andre Luiz [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil)

    2010-07-01

    Integration of power generation and transmission systems can provide a better utilization of energy resources and increase systems reliability. Given that Brazilian interconnection with Argentina, which represents the major Brazilian interconnection with neighboring countries, is used basically in winter months or in situations of unfavorable hydrology, this paper aims to demonstrate that power exchange between these two countries can be much higher than currently observed, resulting in greater benefits for producers and consumers of electricity in both countries, and that these benefits can also be obtained through better use of existing and planned interconnections between South American countries. To estimate the potential for power exchange between the electrical systems of Brazil and Argentina, three sets of simulations using the Brazilian Energy Plan (PDE 2010-2019) deck for Newave model, available from EPE, were made. These simulations consider the possibility that: (i) electricity is exported from Brazil to Argentina (II) electricity is imported from Argentina and (III) electricity is exchanged in both directions. The simulation results indicate that, despite rising operational marginal costs, significant amounts of electricity can be exported to Argentina at relatively low prices, depending on hydrological conditions. Moreover, the possibility of electricity imports from Argentina can reduce the operational costs of Brazilian system, as well as minimizing the risk of shortages. This work shows that the interconnections between Brazil and Argentina may be better used to benefit producers and consumers in both countries. Therefore, it is necessary to define an effective contractual and operational model for power trading and electricity transfer between these countries with the objective of promoting stability and mutual trust. Finally, studies to evaluate the potential for electricity exchange between South American countries are specially important, enabling better utilization of energy resources of each country and contributing to continent's energy integration. (author)

  14. Cost reduction of electric energy in pumping station of small and medium size water systems; Reducao do custo de energia eletrica em estacoes elevatorias de sistemas de abastecimento de agua de pequeno e medio portes

    Energy Technology Data Exchange (ETDEWEB)

    Tsutiya, Milton Tomoyuki

    1989-12-31

    This work presents the main aspects concerning the electric energy cost reduction and includes since simple solutions of easy installation, usually without the need of great study or investment, until the more complex ones that lead to the cost diminution achieved through the energy consumption reduction. Aspects relating to cost abatement accomplished by modifying the pumping operation systems are considered as well. At last, it exposes the conclusions of the work. (author). 69 figs., 14 tabs., 110 refs

  15. Artificial neural networks applied to the prediction of spot prices in the market of electric energy; Redes neurais artificiais aplicadas na previsao de precos spot no mercado de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Alcantaro Lemes; Grimoni, Jose Aquiles Baesso [Univesidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia], emails: alcantaro@iee.usp.br, aquiles@iee.usp.br

    2010-07-01

    The commercialization of electricity in Brazil as well as in the world has undergone several changes over the past 20 years. In order to achieve an economic balance between supply and demand of the good called electricity, stakeholders in this market follow both rules set by society (government, companies and consumers) and set by the laws of nature (hydrology). To deal with such complex issues, various studies have been conducted in the area of computational heuristics. This work aims to develop a software to forecast spot market prices in using artificial neural networks (ANN). ANNs are widely used in various applications especially in computational heuristics, where non-linear systems have computational challenges difficult to overcome because of the effect named 'curse of dimensionality'. This effect is due to the fact that the current computational power is not enough to handle problems with such a high combination of variables. The challenge of forecasting prices depends on factors such as: (a) foresee the demand evolution (electric load); (b) the forecast of supply (reservoirs, hydrology and climate), capacity factor; and (c) the balance of the economy (pricing, auctions, foreign markets influence, economic policy, government budget and government policy). These factors are considered be used in the forecasting model for spot market prices and the results of its effectiveness are tested and huge presented. (author)

  16. Rational use of electrical energy in artificial light in the production of chrysanthemum seedlings in greenhouse; Uso racional de energia eletrica em iluminacao artificial na producao de mudas de crisantemo em ambiente protegido

    Energy Technology Data Exchange (ETDEWEB)

    David, Eduardo [Universidade Estadual de Campinas (FEA/UNICAMP), SP (Brazil). Fac. de Engenharia Agricola], e-mail: eduardo.david@gr.unicamp.br; Rossi, Luiz Antonio [Universidade Estadual de Campinas (DEA/UNICAMP), SP (Brazil). Dept. de Engenharia Agricola], e-mail: rossi@agr.unicamp.br

    2008-07-01

    The type of artificial illumination employed for chrysanthemum cultivation in greenhouses to induce photo period effect will determine its growing rate as well as the energy consumption. Incandescent filament is currently employed for artificial illumination in chrysanthemum nursery to induce photo period effect. Nowadays new illumination technology is being tested aiming energy consumption reduction. The application of illumination based on electrical discharge in sodium or mercury vapor, as well as tubular or integrated compact fluorescent bulbs in chrysanthemum cultivation is identified as the objective of this research work. The experimental part of this work was carried out in a commercial greenhouse model employing five chrysanthemum variety as Papiro, Lindy White, Mona Lisa Rose, Euro Speedy and Stateman during winter and summer period. Parameters employed to the study variety behavior included: production per area, fresh matter weight, presence of flower sprouts and moisture content. The parameters known as electrical variables, like consumption, demand and power factor, together with the treatment energy efficiency index were used to analyze the employed illumination technologies and light bulbs type. Results showed differences between weight of fresh flowers and moisture content for the flowers variety under consideration. Productivity per unit area was noticed to be larger for discharge technology when compared with filament bulbs, for both varieties being tested. The lowest flower sprout occurrence was associated to the discharge technology with the exception of the variety Stateman produced with incandescent bulbs of 100 W in the winter plot. The unique exception related to discharge technology was associated to the White 23 W Integrated Compact Fluorescent bulb yielding 2.4% of flower sprouts compared with 0% of other bulb types associated to the production of the variety Euro Speedy. It was noticed from the results that the yellow integrated compact fluorescent bulbs (23 W) exhibited lower maximum demand as well as an average energy consumption of 75.51% when compared to incandescent filament bulb type (100 W) which is currently employed by the chrysanthemum growers. (author)

  17. Externalities associated with distributed generation of electric energy from biomass in the sugar cane industry; Externalidades associadas a geracao distribuida de energia eletrica a partir de biomassa na industria sucroalcooleira

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Jose Roberto; Coelho, Suani Teixeira; Almeida, Marcelo Costa; Pecora, Vanessa; Prado, Thiago Guilherme Ferreira [Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil)

    2004-07-01

    The externalities related with projects of power generation, the cogeneration in the sugarcane industry including, traditionally are not present in the economic and technical evaluations that support decision making. Such fact implies in a distortion in the evaluation between traditional technologies and the ones based on renewable sources. The Brazilian sugarcane industry presents increasing potential for the participation in the segment of power generation. This study presents partial results from a work group project concerned on research of the externalities associated to the cogeneration using bagasse from sugar cane processing. Externalities are identified from the distributed generation consequences. The possibility of minimizing negative externalities from the sugarcane industry, caused by the production of sugar and alcohol, with positive externalities from the social benefits of distributed generation is the most important conclusion reached as so far. (author)

  18. The sector restructuring and the consequences on the planning and the marketing studies of the electric power distributors; A reestruturacao setorial e os reflexos sobre o planejamento e os estudos de mercado das distribuidoras de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Matsudo, Eduardo

    2001-05-15

    After the restructuring of the Brazilian power sector during the 1990's a new set of rules and players (regulators, traders, etc.) was introduced. This situation resulted in significantly impacting the distribution companies in terms of market risks and commercial opportunities. Electric power market assessments that provide fundamental information to the system and tariff planning groups can also be used to support the distribution companies in analyzing various questions within the new rules that have been created. These questions include such items as: how much energy should be contracted in the future in the wholesale market?; how much opportunity is available in offering commercial services to the customer?. This work describes the main changes that have occurred due to the restructuring, such as: the privatization process, a wholesale market implementation, rules for energy trading, and planning and regulatory process. The main challenges for distribution companies as a result of these changes are identified, especially focusing on energy trading in retail and wholesale markets. The process of electric power market assessments is presented and describing the accepted methodology used for demand forecasting for distribution companies. Information required by distribution companies in order to deal with the market challenges are specified - e.g. energy trading, market risks and customer relationship. It is concluded there is a need to obtain detailed information about consumers and to develop market forecast for specific time frame. It must take into consideration all the issues around the retail market - the study needs to analyze the basic factors that impact customer consumption. In order to improve the electric market assessment, it has been useful to apply specific models. After reviewing the existing tools for electric power market assessments (analysis and forecast), it has been found that the models that combined methods of end use analysis with scenario analysis are most effective. In this way, the distribution companies needs are met and the process also results in better market data for planning and regulatory agencies. (author)

  19. A fuzzy set decision making model applied to electric power systems operation planning; Um modelo de decisao baseado em conjuntos nebulosos aplicado ao planejamento da operacao de sistemas de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Valenca, Mauricio Mendonca

    1993-05-01

    The power system static operation planning has a main objective the determination of performance strategies which satisfy operational criteria. A fuzzy set decision model which takes the load attainment and the compromise between optimality and critical operational constraints into account is presented. The prime characteristic of this methodology is the incorporation of the planner`s preferences structure in a decision process modeled by fuzzy sets. A routine of optimal power flow calculation is used as a computational tool for solving the nonlinear model of the electric power system and for defining the universe of discourse of the decision-making problem. tests were carried on a 30-bus IEEE system in order to find a compromise solution of electric operational goal versus reactive power generation limits. Results and conclusions are presented. (author) 28 refs., 32 figs.

  20. Wind energy conversion systems with electric transmission to the water pumping with field control to constant flow; Sistema de conversao de energia eolica com transmissao eletrica para bombeamento de agua com controle de campo a fluxo constante

    Energy Technology Data Exchange (ETDEWEB)

    Nobrega, Juraci Carlos de Castro

    1989-07-01

    The stead-state analysis of a Wind Energy Conversion Systems, consisting on a Windmill, Synchronous Generator, transmission Line and Induction Motor driving a Centrifugal Pump is developed. The performance of the system operating at variable Speed with a flux control is examined using mathematical and digital simulation. The control scheme is proposed and tested in laboratory and a tested in laboratory and a test centre to be compared with simulation results. (author)

  1. Paradigm of planning under uncertainties - application to the planning of the electric energy distribution system; Paradigma de planejamento sob incertezas - aplicacao ao planejamento dos sistemas de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Bianchi Junior, Alberto; Reis, Lineu Belico dos

    1996-07-01

    In this work it is presented an original methodology of multistage planning, with conflictive objectives and restrictions, incorporating the concept of uncertainties. To do so, the proposed paradigm is based on the dynamic programming, which comprehends the multistage processes subjected to conflictive restrictions; on the Fuzzy Sets Theory, through the decisions and Fuzzy numbers, which model the uncertainties and ambiguous decisions relative to qualitative variables; and on the consideration of 'evolutional rules' associated to 'network flow' algorithm. In its conceptual elaboration, the paradigm is developed in a very ample way, of generalized application to a well defined class of planning problems. Particularly, the model fits in the ambit of the flexible planning, which has been very discussed in the recent literature. Flexible planning must be understood as the one which allows to the planner, under well-defined limits, the evaluation of the planning policy composed by 'strips' of actions (discrete or continuous), associated to uncertainty levels related to the 'real world'. In order to validate and consolidate the theoretic concepts, it was elaborated an algorithm turned to the aggregated planning of the distribution of electric power, that presents intrinsic characteristics which are perfectly fitted in the paradigm's applicability. Through comparisons effectuated with and pre-validated algorithm, evaluations related to the potentialities and to the coherence of the paradigm's applicability were made. (author)

  2. An integrated model for a forecasting model of the electric power market in the long term; Um modelo integrado de previsao do mercado de energia eletrica a longo prazo

    Energy Technology Data Exchange (ETDEWEB)

    Faria, Sergio Nilo Gomes

    1993-07-01

    A proposal for a forecasting model of the electricity market which, in methodological terms, is based on classic econometric formulations - evaluation of income and price elasticities. The electricity demand for some industrial sectors is dealt with in a desegregated way, in order to capture its dependence on the economic activity of these sectors is presented. The proposal of this thesis differs from the usual methodology as far as evaluating the impacts of the energy demand forecast, conformed to well defined macroeconomics and tariff policy assumptions, on the expansion of the power system as a whole, and, particularly, on the financial situation of the power sector. The motivation for the study was the need for a new methodological tool, broad, but streamlined enough to allow widespread assessments of alternative development scenarios associated to different economic and politic contexts, taking into account the main uncertainties present in the several planning stages. (author)

  3. Evaluation of demand for water and electricity for papaya micro sprinkler irrigation system in Paraiba state, Brazil; Avaliacao das demandas de agua e energia eletrica para mamao irrigado por microaspersao no estado da Paraiba

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Riuzuani Michelle Bezerra Pedrosa; Dantas Neto, Jose; Farias, Soahd Arruda Rached Farias; Azevedo, Carlos Alberto Vieira de [Universidade Federal de Campina Grande (UAEAG/UFCG), PB (Brazil). Centro de Tecnologia e Recursos Naturais. Unidade Academica de Engenharia Agricola], Emails: riuzuani@yahoo.com.br, zedantas@deag.ufcg.edu.br, soahd_rached@hotmail.com, cazevedo@deag.ufcg.edu.br

    2010-07-01

    This study aimed to conduct an assessment on the demands for water and electricity for fruit irrigated by micro sprinkler irrigation in agricultural planning. We obtained the demands of gross water and electricity for papaya in 15 municipalities spread over the Rio Paraiba-PB, which was used by micro irrigation system with 90% application efficiency. The city of Joao Pessoa is the place to lower water consumption, requiring 32.9% of the amount required for papaya in Exile, which had the highest annual and daily evapotranspiration, combined with the lowest annual rainfall likely at a 75 % probability. The municipalities were chosen because they had a greater variance in terms of climate, in order to examine various irrigation demands. In Exile is a necessary volume of water-to 8.006,9 m{sup 3}.ha{sup -1}.year{sup -1} to produce one hectare of papaya while in Joao Pessoa need to 2.712,89 m{sup 3}.ha-1.year{sup -1}. The consumption of electricity in the city of Desterro is higher among the cities studied, necessitating 2.009,0 kW.ha{sup -1}.ano{sup -1} to produce one hectare of papaya, while in Joao Pessoa we only need 876,54 kW.ha {sup -1}.ano{sup -1} (author)

  4. The participation of the sectors of electric energy consumption in a rural electrification cooperative; A participacao dos setores de consumo de energia eletrica em uma cooperativa de eletrificacao rural

    Energy Technology Data Exchange (ETDEWEB)

    Higuchi, Cristiane Aparecida Pelegrin [Instituicao Toledo de Ensino (ITE), Bauru, SP (Brazil). Fac. de Ciencias Contabeis], e-mail: cristiane.higuchi@itelefonica.com.br; Siqueira, Jair Antonio Cruz [UNESP, Botucatu, SP (Brazil). Faculdade de Ciencias Agronomicas. Curso de Pos-Graduacao em Energia na Agricultura], e-mail: jairsiqueira@fca.unesp.br; Seraphim, Odivaldo Jose [UNESP, Botucatu, SP (Brazil). Faculdade de Ciencias Agronomicas. Dept. de Engenharia Rural], e-mail: seraphim@fca.unesp.br; Ielo, Frederico G. de Paula F. [Universidade Estadual de Ponta Grossa, PR (Brazil). Dept. de Informatica

    2004-07-01

    This work had the objective of to evaluate the behavior of the electrical energy distribution in a Rural Electrification Cooperative, placed inside the State of Sao Paulo, embracing the region of the county of Itai, Avare and Paranapanema. Were appraised the electric energy distribution data of the Rural Electrification Cooperative of Itai, Avare and Paranapanema - CERIPA, during the years of 2000, 2001 and 2002. Was evaluated the sale of energy evolution, clearance evolution, general load factor and the electrical distribution for consumer type. The found results allowed to end that the Rural electrification Cooperative, show a good electric energy distribution in residential, rural and irrigation sectors. (author)

  5. The Brazilian experience of incentive of renewable sources expansion by means of electric power auctions; A experiencia brasileira de incentivo a expansao das fontes renovaveis por meio de leiloes de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Viana, Alexandre Guedes [Camara de Comercializacao de Energia Eletrica (CCEE), Sao Paulo, SP (Brazil); Parente, Virginia [Universidade de Sao Paulo (USP), SP (Brazil)

    2010-07-01

    The aim of this paper is to present the Brazilian experience to encourage renewable sources of power generation through the auctions into the Regulated Environment of Contracting. These auctions are subdivided into auctions of existing plants, new plants, alternative sources and structural plants. In this process we observe the structure of the mechanism for contracting new projects of renewable sources without neglecting the low tariffs issues. Thus, the auctions of electricity in Brazil is an alternative to be considered in an attempt to group market mechanisms, low tariffs and incentives to renewable sources of generation. (author)

  6. Economic analyse of industrial production and electric energy consumption on a sugar-alcohol plant; Analise economica da producao industrial e do consumo de energia eletrica em uma usina sucro-alcooleira

    Energy Technology Data Exchange (ETDEWEB)

    Bini, Aderson

    1993-10-01

    Economic aspects of industrial production of sugar cane and automotive alcohol fuel, the relation between its production and electric energy consumption, electric energy costs to self generated electric power and concessionary supply, involved in plant production on Ribeirao Preto, SP, Brazil, are presented. Studies to verify the relationships between sugar and alcohol production with milling ours as well as sugar cane processed with sugar and alcohol produced are also discussed 27 refs., 12 figs., 38 tabs.

  7. A 20 MW{sub t} pilot plant for the generation of electric power by magnetohydrodynamic process using biomass; Planta piloto de 20 MW{sub t} de geracao de energia eletrica por magnetohidrodinamica a partir da biomassa

    Energy Technology Data Exchange (ETDEWEB)

    Pinatti, D G; Guimaraes, O L.C.; Silva, A C da; Batista, J F [Fundacao de Tecnologia Industrial (FTI), Lorena, SP (Brazil); Fernandes Filho, G E.F.; Magalhaes Filho, P [UNESP, Guaratingueta, SP (Brazil). Faculdade de Engenharia

    1991-12-31

    The combustion of celulignin from biomass with addition of 1% of K, generates a plasma with electric conductivity of 100 S/M. This allows the establishment of a small size thermoelectric plants in triple or double cycle with magnetohydrodynamic generator (MHD), gas turbine and steam turbine. It is presented calculations of a pilot plant of 20 MW{sub t} in the MHD circuit and a total of 30 MW{sub t} with net efficiency of 27%. For plants larger than 60 MW{sub t} it is expected net efficiency larger than 37%. 3 refs., 10 figs., 3 tabs

  8. 2015 Plan. Project 4: electric power supply, technologies, cost and availability. Sub-project forest biomass. Plano 2015. Projeto 4: oferta de energia eletrica, tecnologia, custos e disponibilidades. Subprojeto biomassa florestal

    Energy Technology Data Exchange (ETDEWEB)

    1993-07-01

    The potential and the costs of forest biomass utilization for electric power generation in Brazil are evaluated, including a discussion of the technologies and the forecasts in fuel production area (forests management) and in electric power conversion and generation areas. The socio-economics and environmental aspects referring to wood utilization as energetic resource are also described. (C.G.C.).

  9. Utilization of biogas from sanitary landfill for generation of electrical energy in Sao Paulo: a case study; Aproveitamento do biogas proveniente de aterro sanitario para geracao de energia eletrica em Sao Paulo: estudo de caso

    Energy Technology Data Exchange (ETDEWEB)

    Garcilasso, Vanessa Pecora; Coelho, Suani Teixeira Coelho [Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil); Velazquez, Silvia Maria Stortini Gonzalez [Universitaria Presbiteriana Mackenzie, Sao Paulo, SP (Brazil)

    2010-07-01

    Utilization of the biogas proceeding from urban solid residues for electricity generation: case study in Sao Paulo. The biogas, generated from organic matter degradation, is composed by a mixture of gases, the main components being carbon dioxide and methane, which is a greenhouse effect gas with global warming potential around 21 times greater when compared to CO{sub 2}. Biogas production is possible from a great variety of organic residues such as urban solid residues, residues from agricultural and livestock activities, swine livestock, sewage mud, among others. The sanitary landfills may count on techniques of capture of the produced biogas and its later burning in flare, where the methane is transformed in CO{sub 2}, minimizing the environmental impact. Besides the opportunity of reducing the environmental damages, biogas can also be used as fuel for generating electricity, thus adding environmental gain and reduction of costs, due to the diminishing of purchase of the energy consumed in the concessionaire. In this context, this article presents the project of utilization of biogas proceeding from urban solid residues for electricity generation and gas illumination, developed by CENBIO. This project is currently in development and the obtained results will provide technical and economic subsidies for its replication. (author)

  10. The NERAM project: A model for Electric Power Enterprise in Isolated Communities in the Amazon; O Projeto NERAM - Modelo de Negocio de Energia Eletrica em Comunidades Isoladas na Amazonia

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Monica; Xavier, Diogo; Souza, Rubem; Seye, Omar; Santos, Eyde dos; Freitas, Katriana; Moraes, Marcia [Universidade Federal do Amazonas (CDEAM/UFAM), Manaus, AM (Brazil). Centro de Desenvolvimento Energetico Amazonico], Email: monica.mzman@gmail.com

    2006-07-01

    This work presents an overview of the ongoing NERAM - A Model for Electric Power Enterprise in Isolated Communities in the Amazon, a project from CDEAM (Center for Amazonian Energetic Development), financed by CNPq (National Counsel of Technological and Scientific Development). This project aims at establishing a model for rural electrification associated with income generation and based on the sustainable use of local resources. This paper presents the most relevant aspects of the context as well as a general description of the project. The current rural power supply, the socio-economic condition of isolated communities, the income generation from acai pulp and the system generation, the biomass characterization are topics addressed herewith. This text aims at a global outlook and to provide basic understanding of the project, since specific papers will address these issues separately and in depth. (author)

  11. Key factors that influence the demand and the consumption of electric power in solar home systems; Principais fatores que influenciam a demanda e o consumo de energia eletrica em sistemas fotovoltaicos domiciliares

    Energy Technology Data Exchange (ETDEWEB)

    Morante, Federico; Zilles, Roberto [Universidade de Sao Paulo (USP), SP (Brazil). Programa Interunidades de Pos Graduacao em Energia. Lab. de Sistemas Fotovoltaicos

    2004-07-01

    From the results obtained with a field research looking for to understanding the behavior of the electric energy demand in Solar Home Systems, the aleatory influence factors in the demand was identified These can be contained in technical, management, psychological, geographical, demographic, socio cultural and economic factors. The purpose of this paper is to describe each of them and, simultaneously, present some registration discover with the field work. The survey involved 178 people and 13 rural communities located in the States of Sao Paulo, Pernambuco and Amazonas and, besides, in the Puno area, in Peru. Ten of those communities are electrified with photovoltaic systems and three with the conventional electric grid. (author)

  12. A heuristic model for planning problem solution of reactive in electric power systems; Um modelo heuristico para solucao do problema de planejamento de reativos em sistemas de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Mantovani, Jose Roberto Sanches

    1995-02-01

    This work introduces a model to solve the planning problem of reactive in electric power systems. The proposed method uses mixed integer linear programming and is solved using implicit enumeration (binary search). The special heuristics to reduce candidates' initial set and to obtain discreet solutions are adopted. They were going accomplished two algorithm implementations, one sequential and other parallel. The implementation parallel uses an asynchronous programming model and is adjusted for distributed memory computer. Defined a bars candidates set for the new reactive sources allocation, the developed program supplies the location and the reactive sources magnitude that must be allocated in the system, considering safety and operation restrictions. The implementation parallel performance is evaluated for three real systems of 309, 725 and 810 bars. The results for the test systems IEEE30 and IEEE118, and the three real systems used in the implementation parallel evaluation are also presented.

  13. Analyze the economic and environmental viability in distributed generation of electric power from renewable sources; Analise da viabilidade economica e socioambiental na geracao distribuida de energia eletrica a partir de fontes renovaveis

    Energy Technology Data Exchange (ETDEWEB)

    Jantim Neto, Humberto [Universidade Estadual de Campinas (UNICAMP), SP (Brazil)

    2010-07-01

    This paper brings a brief of economical and social environmental analysis about distributed electric's energy generation, based on a comparison to centralized generation. The motivation of the proposed analysis has its origin on a reflection about politics and scheming directed to Brazilian's energy sector. This study has renewable energy resources as setting, represented for Belo Monte generation's plant and undertaking registered on the Reservation's Energy Auction 2010. The study took into account economics and technical aspects, whereas the viability analysis was formed from benefits got from different forms of electric's generation. The conclusions of this shows that distributed electric's energy generation may have economics and socio environment benefits over centralized generation. (author)

  14. Comparative analysis of the cost of application for a blade of irrigation using electric energy and diesel; Analise comparativa do custo para aplicacao de uma lamina de irrigacao utilizando energia eletrica e diesel

    Energy Technology Data Exchange (ETDEWEB)

    Sa Junior, Arionaldo; Carvalho, Jacinto de Assuncao; Oliveria, Eduardo Carvalho de [Universidade Federal de Lavras (DEG/UFLA), MG (Brazil). Dept. de Engenharia], email: arionaldojr@hotmail.com

    2011-07-01

    The aim of this study was to estimate the cost of electric and diesel power for the application of 1 mm of irrigation in an area of 1 hectare. The Tariff Group considered was 'B' for low voltage and subgroup 'B2 Rural'. The fares used were obtained from CEMIG, being of R$ 0.22019. The diesel value adopted was the month of November 2010 in the southern region of Minas Gerais, comprising $ 1.97 L{sup -1}. For purposes of calculation, the total income of the height manometric were taken, respectively, 60%, 65%, 70%, 75% and 10, 25, 75, 100, 125, 150, 175 and 200 mca. To calculate the total cost with the application of the depth of 1mm was considered that the cost of energy accounts for 65% and 75% for electric and diesel, respectively. The results show a increase in energy costs by increasing the total head. The use of systems more efficient pump reduces the cost of electric power in the order of 6.7% to 20% and diesel from 3.6% to 16.2% for the proposed situations. In all cases the electric power is more appropriate with regard to cost. The relationship between electricity and diesel is 51.62% and 15.98% for better and worse, respectively. (author)

  15. Hybrid instrument applied to human reliability study in event of loss of external electric power in a nuclear power plant; Instrumento hibrido aplicado ao estudo da confiabilidade humana em evento de perda de energia eletrica externa em usina nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Eduardo Ferraz

    2015-04-01

    The study projects in highly complex installations involves robust modeling, supported by conceptual and mathematical tools, to carry out systematic research and structured the different risk scenarios that can lead to unwanted events from occurring equipment failures or human errors. In the context of classical modeling, the Probabilistic Safety Analysis (PSA) seeks to provide qualitative and quantitative information about the project particularity and their operational facilities, including the identification of factors or scenarios that contribute to the risk and consequent comparison options for increasing safety. In this context, the aim of the thesis is to develop a hybrid instrument (CPP-HI) innovative, from the integrated modeling techniques of Failure Mode and Effect Analysis (FMEA), concepts of Human Reliability Analysis and Probabilistic Composition of Preferences (PCP). In support of modeling and validation of the CPP-HI, a simulation was performed on a triggering event 'Loss of External Electric Power' - PEEE, in a Nuclear Power plant. The results were simulated in a virtual environment (sensitivity analysis) and are robust to the study of Human Reliability Analysis (HRA) in the context of the PSA. (author)

  16. The utilization of induction generators working with PATs (pumps working as turbines) in electric energy generation; A utilizacao de geradores de inducao acionados por BFTs (bombas funcionando como turbinas) na geracao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Viana, Augusto Nelson Carvalho; Rezek, Angelo Jose Junqueira; Medeiros, Daniel de Macedo [Universidade Federal de Itajuba (UNIFEI), MG (Brazil). Programa de Pos-graduacao em Engenharia da Energia], e-mail: augusto@unifei.edu.br, e-mail: rezek@iee.efei.br, e-mail: macedo@unifei.edu.br

    2004-07-01

    The utilization of the Pumps working as Turbines (PATs) in micro hydro-energy resources to replace the conventional turbines as Pelton, Francis and Propeller have been used in countries as USA, Germany and France. In the mean time, in Brazil this practice and the utilization of induction generators working with PATs is still in the scope of the laboratory experiments. This work, based on experimental results carried on in Laboratory of Hydromechanics for Small Hydro Power Plants (Laboratorio Hidromecanico para Pequenas Centrais Hidroeletricas - LHPCH - UNIFEI), (VIANA, 1987), (VIANA e NOGUEIRA, 1990), propose the utilization of asynchronous generator groups operating with PATs. To show the investment cost decrease in micro hydro power plants (MHPs), is showed the Boa Esperanca MPH example, in which is presented a comparison between the synchronous generator group cost working with a Michell-Banki turbine and a asynchronous generator group operating with a PAT. (author)

  17. Diagnosis of electric energy using for a cold storage room of chicken emphasizing energy efficiency measures; Diagnostico do uso de energia eletrica de um frigorifico de frangos de corte enfatizando medidas de eficiencia energetica

    Energy Technology Data Exchange (ETDEWEB)

    Bueno, Leda Gobbo de Freitas [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Centro de Tecnologia; Rossi, Luis Antonio; Mederos, Barbara Teruel; Moura, Daniella Jorge de [Universidade Estadual de Campinas (FEA/UNICAMP), SP (Brazil). Fac. de Engenharia Agricola

    2008-07-01

    In the slaughterhouses the operations that if unchain in the one before slaughter until the storage of the end item are intensely dependents of the electric energy and answer for the final product quality. This work had as objective to diagnosis, to analyze and to consider solutions that lead to the rational use of the electric energy without intervening or keeping the product quality in the lines of production of one cold storage room of broiler including the storage process that uses chambers of cooling and freezing. This work was carried through in one cold storage room of slaughter of chicken situated in the state of Sao Paulo in the period of 2004 the 2008. Through the analyses it was verified that the compressors of the room of machines, responsible for the maintenance of the cold of cooled environments, had presented the biggest consumption of electric energy in the cold storage room, about 97%. It was observed that in none of the evaluated electric engines, the potency factor, reaches the value recommended for the ANEEL, and that possibly with the implantation of measures of conservation of electric energy pointers of energy efficiency as the load factor and the specific consumption they can be optimized. It was concluded to have imperfections in the use of the electric energy demonstrating necessity of the implementation of an action plan that aims at the conservation and the rational use of the energy and consequence reduction in the costs generated for production of broiler. (author)

  18. Sustainability as a proposal for deployment of electrical energy in maroon isolated communities in Jalapao - TO, Brazil; Sustentabilidade como proposta para implantacao de energia eletrica em comunidades isoladas e quilombolas no Jalapao - TO

    Energy Technology Data Exchange (ETDEWEB)

    Zukowski Junior, Joel Carlos; Santos, Weder Ferreira dos; Marcon, Rogerio Olavo; Nobrega, Silvestre Lopes da [Universidade Luterana do Brasil (CEULP/ULBRA), Palmas, TO (Brazil). Centro Universitario Luterano], e-mail: wedereira@yahoo.com.br

    2008-07-01

    Nowadays Brazil has many isolated communities. This isolation occurs mainly due to territorial conditions. Besides this aspect, the lack of structure produces another isolation, much more harmful, the social one. To promote social inclusion and sustainable development, some requirements are essential. Amongst all of them, the provision of electricity is the most prominent. This study aimed to provide electricity to an isolated community in Jalapao region, Mateiros city, in the state of Tocantins. It was installed a hybrid aeolian-photovoltaic system, with capacity to produce 9676.80 kWh per year. This electricity system aims to improve the production process, so it was installed at the local community workshop. The results indicate that the system can be sustainable if the community makes use of the whole potential of the electricity generation, using it in the production process. (author)

  19. Small nuclear power reactor emergency electric power supply system reliability comparative analysis; Analise da confiabilidade do sistema de suprimento de energia eletrica de emergencia de um reator nuclear de pequeno porte

    Energy Technology Data Exchange (ETDEWEB)

    Bonfietti, Gerson

    2003-07-01

    This work presents an analysis of the reliability of the emergency power supply system, of a small size nuclear power reactor. Three different configurations are investigated and their reliability analyzed. The fault tree method is used as the main tool of analysis. The work includes a bibliographic review of emergency diesel generator reliability and a discussion of the design requirements applicable to emergency electrical systems. The influence of common cause failure influences is considered using the beta factor model. The operator action is considered using human failure probabilities. A parametric analysis shows the strong dependence between the reactor safety and the loss of offsite electric power supply. It is also shown that common cause failures can be a major contributor to the system reliability. (author)

  20. The electric energy consumption in the city of Sao Paulo - Brazil: the residential sector in the eighties; O consumo de energia eletrica na cidade de Sao Paulo: o setor residencial nos anos oitenta

    Energy Technology Data Exchange (ETDEWEB)

    Borelli, A.B.; Sellito, Y.M.; Moreira, J.G.S. [Sao Paulo Univ., SP (Brazil). Inst. de Eletrotecnica e Energia

    1994-07-01

    This work analyses the evolution of the energy consumption in the residential sector of the city of Sao Paulo in the years of 19980, 1985 and 1990, and relates electric power cost participation in the family monthly stratified budget. Also, the price x consumption elasticity verified in the mentioned period is analysed.

  1. Electric power social tariff: an environment of breach of contract, supply cuts and survival strategies; Tarifa social de energia eletrica: um ambiente de inadimplencia, cortes de fornecimento e estrategias de sobrevivencia

    Energy Technology Data Exchange (ETDEWEB)

    Nunes Filho, Fernando Barreto; Nunes, Fernando Barreto; Nunes, Rina Azaryah Barreto. E-mail: fnunes@coelba.com.br

    2002-07-01

    This paper gives a contribution to the present debate on the electric power social tariff, focusing the maximum kWh level, for the payment difficulties of that client, and the client-concessionaire relationship. Initially, a theoretical basis is presented highlighting the role of the social stratification existent in the urban environment.

  2. Solving optimization problems using hybrid architecture: a strategy for planning the electric power generation; Solucao de problemas de otimizacao utilizando arquitetura hibrida: uma estrategia para o planejamento da geracao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Murakami, L.T. [Lechare Informatica Ltda., Sao Paulo, SP (Brazil)

    2009-07-01

    Electrical power could be considered as one of the economy propulsion vector of a country, assuming extremely important and strategic role because it makes direct influence to the production capacity. The expansion of electrical energy production could not only be done in a short time because constructions in this area take many years and could require more then a decade depending on the magnitude of them. The national power generation group is constituted mainly by hydro power plants complemented by thermal power plants which use several kinds of fuel which generation cost is high, if compared to hydro power generation, and should be minimized. It is a complex planning issue to supply the future power demand which basically depends on the analysis of two compoundable scenarios: the first one refers to the forecast of future economy growing and in this case, unless unpredictable issues occur such as the recent high economy growing experimented by China, the future demand does not show any surprise and is easy to predict; the second one, has inside the uncertainty because the hydro plants productions depends on the water quantity of rivers which depends on the past and current rainfall regimen. The quantity of rainfall is a stochastic data and follows the rules of probability and this drives to the study of cases and its deployments which are numerous causing difficulties to forecast the future. The planning of the electrical area has to examine the future demand and provide the necessary power generation equipment assuming a certain risk. To have it done, simulation models are used to predict the future, combining the two scenarios cited before, and viewing the results promoted by decision took in a step before. The difficult of this task is caused by the big amount of future alternatives provided by the combinatorial phenomena which require, to process the model, a computer with high processing capacity and specialized and specific methods that can resolve this king of problem. Because of the importance and magnitude of this issue, every effort which contributes to the improvement of power planning is welcome and this corroborates with this thesis which has an objective to propose technical, viable and economic solutions to solve the optimization problems with a new approach and has potential to be applied in many others kind of similar problems.

  3. The TCSC (Thyristor Controlled Series Compensator) in a multi machine electric power system: the effects on the synchronizing power; O TCSC em um sistema de energia eletrica multimaquinas: os efeitos sobre a potencia sincronizante

    Energy Technology Data Exchange (ETDEWEB)

    Silva, J.C.; Colvara, L.D. [Universidade Estadual Paulista (FEIS/UNESP), Ilha Solteira, SP (Brazil). Dept. de Engenharia Eletrica], Emails: jadiel_silva@hotmail.com, laurence@dee.feis.unesp.br

    2009-07-01

    The problem of stability of electric power systems, from the standpoint of ability to sync and how FACTS (Flexible Alternating Current Transmission Systems) devices affect this ability in particular the TSCS (Thyristor Controlled Series Compensator) inserted into an environment multi machine, is addressed. The effects of this device on the power synchronizing are considered through analysis of the matrix admittance of the bar, focusing on the transfer admittances between machines.

  4. Alternatives for hydrogen production in Brazilian regions aiming the generation of distributed electric energy; Alternativas para a producao de hidrogenio nas regioes brasileiras visando a geracao de energia eletrica distribuida

    Energy Technology Data Exchange (ETDEWEB)

    Bernardi Junior, Paulo

    2009-07-01

    In this work possible sources of hydrogen production for the generation of electric energy in a distributed way, with the fuel cell use, had been selected and studied. Three renewable sources (biomass, photovoltaic and wind) have been studied for energy generation in Brazil. For the establishment of numerical values, the main regional agricultural cultures and the amount of biomass in various brazilian states had been evaluated, in the form of waste, capable to be used for future hydrogen production. It was also investigated and evaluated the numerical capacity of hydrogen production from wind and photovoltaic resources for each region in Brazil, considering the electrolytic process. Based on the results, it is possible to demonstrate the potentialities of Brazil for electric energy generation in a planned distributed way, with fossil fuel substitution, and consequently, decreasing the environmental impacts. (author)

  5. Computational intelligence applied to the logistics of electric energy distribution network maintenance teams; Inteligencia computacional aplicada a logistica de equipes de manutencao de redes de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Bobel, Edson [Companhia Paranaense de Energia (COPEL), Curitiba, PR (Brazil)]. E-mails: edson.bobel@copel.com; Lopes, Heitor Silverio [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba (Brazil)]. E-mail: hslopes@utfpr.edu.br

    2007-10-15

    One of the problems that an Electric Energy Distribution Company faces is the maintenance of its distribution network. This study focuses on the problem of allocating emergency maintenance teams so that costs related to the energy outage as well as the cost of the teams themselves are minimized. This study includes a geographic area of 108 counties in the State of Parana, Brazil, and uses information related to: interruptions history in high voltage switches, list of locations able to allocate emergency maintenance teams and list of switches that were actually served by the maintenance teams during the year 2002. With this information and the list of locations with emergency maintenance teams, an estimate of the situation is made and the costs are calculated for the year 2002. With this in hand, the problem was solved using two methods: p-medians and genetic algorithms, in which the potential gains of 13.37% and 12.64% were obtained, respectively, as compared to the costs in 2002, for the same geographic area. Finally, a projection was made for the potential decrease of costs for the Electric Distribution Company regarding the total area of Parana State, as well as an estimate of financial profits for the State Government. (author)

  6. A heuristic model for planning problem solution of reactive in electric power systems; Um modelo heuristico para solucao do problema de planejamento de reativos em sistemas de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Mantovani, Jose Roberto Sanches

    1995-02-01

    This work introduces a model to solve the planning problem of reactive in electric power systems. The proposed method uses mixed integer linear programming and is solved using implicit enumeration (binary search). The special heuristics to reduce candidates' initial set and to obtain discreet solutions are adopted. They were going accomplished two algorithm implementations, one sequential and other parallel. The implementation parallel uses an asynchronous programming model and is adjusted for distributed memory computer. Defined a bars candidates set for the new reactive sources allocation, the developed program supplies the location and the reactive sources magnitude that must be allocated in the system, considering safety and operation restrictions. The implementation parallel performance is evaluated for three real systems of 309, 725 and 810 bars. The results for the test systems IEEE30 and IEEE118, and the three real systems used in the implementation parallel evaluation are also presented.

  7. The convergence of the natural gas industry and electric power industry: the Brazilian case; Convergencia entre a industria do gas natural e a industria de energia eletrica: o caso brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Jose Ricardo Uchoa Cavalcanti [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Programa de Planejamento Energetico

    2008-07-01

    The main purpose of this paper is to analyze the convergence between power (electric sector) and natural gas industries in Brazil. It also shows how this convergence happens in the USA market and its applicability in the Brazilian market. At the end some conclusions and suggestions are presented to satisfy the Brazilian market, which behaves in a different way as the USA market, i.e. the Brazilian market does not follow seasonal pattern but an aleatory pattern in thermoelectric plants. (author)

  8. Model of spatial analysis of electric power market using the Fuzzy C-Means technical classification; Modelo de analise espacial de mercado de energia eletrica utilizando a tecnica de classificacao Fuzzy C-Means

    Energy Technology Data Exchange (ETDEWEB)

    Neto, J.C. [Companhia Energetica de Goias (CELG-D), Goiania, GO (Brazil)], E-mail: joao.cn@celg.com.br; Lima, W.S. [Votorantim Siderurgia, Resende, Rio de Janeiro, RJ (Brazil). Gerencia Geral de Tecnologia], E-mail: wagner.lima@vmetais.com.br

    2009-07-01

    The power distribution companies live with an antagonistic reality: an increasing energy demand, due to steady economic and population growth, and a limitation on their financial resources to expand its network. Therefore, it is essential an improvement in activity of planning of the power distribution system trying to improve the application of available resources. In this context fits the application of Geographic Information System combined with clustering techniques and classification in order to enhance the planning process, giving the planner a more complete picture of the consumer market by the distributor. This paper presents a system that makes use of Geographic Information System combined with the technique of clustering and classification Fuzzy C-Means, with the aim of analyzing the distribution of network load and the performance of the technique. Each group performed leads to a spatial representation (scenario). This, together with an index measuring the performance of the group (intra-group and inter-group) implemented in this work, provides a favorable environment for spatial analysis of the electric power market.

  9. Proceedings of the 13. SNPTEE: Brazilian seminar on electric power production and transmission. Group 1: Hydraulic production (GPH); Anais do 13. SNPTEE: Seminario nacional de producao e transmissao de energia eletrica. Grupo 1: Producao hidraulica (GPH)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-12-31

    This book collects the works presented during the 12. national seminar on electric power generation and transmission. The group I papers collects works concerning hydroelectric power generation, the most common form of electric power generation Brazil due to the country`s natural resources which are favourable to this type of generation. Several case studies are presented as well as the new trends for this generation form in Brazil

  10. Vegetable oil as fuel for electric power generation at Rondonia, BR, small agglomerate as way of revenue generation; Oleo vegetal como combustivel para energia eletrica em pequenos aglomerados de Rondonia como forma de geracao de renda

    Energy Technology Data Exchange (ETDEWEB)

    Moret, Artur de Souza [Fundacao Universidade Federal de Rondonia (UNIR), Porto Velho, RO (Brazil)]. E-mail: amoret@unir.br

    2006-07-01

    This text approaches the question energy having as based alternative combustible reference in vegetal oils and the Decentralized Generation of Energy, for attendance of isolated systems and with small load, having as conceptual base the partner-economic-ambient sustain ability, being the economic chain of the entailed and conditional energy to the ambient, social aspects, technician, politicians, financiers and economics. This text intends to demonstrate to the mechanisms used in a research and development project (P and D) for the determination and domain of energy generation, electricity and power, from vegetal oils of suitable oleaginous to the State of Rondonia for a Extractive Reserve. Having as reference the contribution for the local and sustainable development of isolated localities, for the generation of job and income, for the energy self-sufficiency of isolated localities and to make available alternative to the companies of the electric sector of energy availability of isolated communities. (author)

  11. Strategic planning and controlling model for electricity distribution concessionaires in Brazil; Modelo de planejamento estrategico e de controle de gestao para as empresas distribuidoras de energia eletrica no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Margueron, Marcus Vinicius Lourenco

    2008-02-15

    Corporate strategies of agents operating in the electric power sector must be constantly aligned with current regulatory structure. This thesis presents an innovative study, which allows the definition of strategies for distributors located in the partially deregulated Brazilian electric power sector, in which the coexistence of regulation and competition results in business environments where competitive threats and cooperation opportunities must be very well managed. It concludes that the best competitive strategy for Brazilian distributors should be cost leadership aiming at encouraging fidelity of the three complementary agents able to freely circulate between both different environments of electric power contracting in Brazil - regulated contracting environment and free contracting environment. These three complementary agents are potentially free consumers, power producers and technology companies. (author)

  12. The nationalization of electricity supply and construction of large hydropower in Para State, Brazil; A estatizacao da oferta de energia eletrica e a construcao de grandes hidreletricas no estado do Para

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Marcos Vinicius Miranda da [Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Belem, PA (Brazil)], email: marcos.silva@pq.cnpq.br; Beltrao, Norma Ely Santos; Ferreira Filho, Helio; Oliveira, Renata Melo e Silva de; Penna, Heriberto Amanajas [Universidade Estadual do Para (UEPA), Belem, PA (Brazil)], emails: normaelybeltrao@gmail.com, hlio.ferreira@gmail.com, renata_ep@yahoo.com.br, heripena@yahoo.com.br

    2010-07-01

    The state of Para has the largest hydropower potential in Brazil, making it one of the main targets of electricity supply expansion policy. It is not only the existence of this potential that has created a favorable context for building of large hydroelectric dams in Para state, other factors also play important role. In this article will be analyzed one of these factors - the statization process of electricity supply in the country - and its influence on decision to build large hydroelectric dams in Para. It is observed that the state presence is an indispensable support to Brazilian electric system expansion policy that prioritizes the building of large hydropower to meet the energy demand in the country. This means that unless there is a change in the control of electric power supply, other large hydroelectric dams will be built in Para state, even taking into account the strong opposition on those generation plants. (author)

  13. Electric energy auctions in Brazil and its effect on emissions of greenhouse gases by the electric sector; Leiloes de energia eletrica no Brasil e sua influencia nas emissoes de gases de efeito estufa pelo setor eletrico

    Energy Technology Data Exchange (ETDEWEB)

    Alpire, Ricardo; Pereira, Osvaldo Livio Soliano [Universidade Salvador (UNIFACS), BA (Brazil)

    2010-07-01

    The result of the auctions of electricity, after the new regulatory framework in 2004, has shown the increased participation of fossil sources of thermal generation, contributing to increased emission of greenhouse gases by the Brazilian Electricity Sector. This article aims to analyze the correlation between growth in electric generation sector and rising greenhouse gases, especially through the study of the winning projects of electric power auctions conducted with the advent of the New Institutional Model of the Power Sector from 2004, comparing with the existing policies and prospects of the next auction of the electric sector. (author)

  14. Perspective for the generation of electrical energy in isolated communities in the Amazon: a case study; Perspectivas para a geracao de energia eletrica em comunidades isoladas na Amazonia: um estudo de caso

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Velazquez, Silvia Maria Stortini; Santos, Sandra Maria Apolinario; Moreira, Jose Roberto; Coelho, Suani Teixeira [Universidade Presbiteriana Mackenzie, Sao Paulo, SP (Brazil); Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil)

    2010-07-01

    Valuing men and the environment in the developing process is essential due to the main model nowadays, which does not harmonize economical development and environmental preservation, besides wildly exploring the natural resources, degrading the environment and concentrating income, and being socially excluding. There is the need to create a model developed harmonically with the environment, focusing the attention on the social and environmental effects caused by the human activities and on the actions that must be taken aiming at the sustainability, the overcome of the social exclusion, and human development. This essay presents a Case Study focused on the electricity generation in an isolated community, which was developed due to the social and environmental matters. The isolated communities are located on the Brazilian North and Northeast regions, which concentrate most of the Brazilian communities with no access to the electric energy distribution network, which is the electricity supply model in Brazil. The low population density regions, like the Amazon region, present low indices of electrification because of this model, since the extension of the network for attending few consumers, is usually economically and environmentally impracticable. The insertion of an energy source of local occurrence, in this case, residues from the forest activities, will bring environmental benefits associated to the social benefits. The energy generation linked to economic activities will generate jobs and income, besides promoting the fossil fuels substitution, decreasing the CO{sub 2} emissions into the atmosphere and the environmental impact caused by the inadequate disposal of the residues, which are many times, burned in the open skies or disposed on the rivers. (author)

  15. Development of a automatic positioning system of photovoltaic panels for electric energy generation; Desenvolvimento de um sistema de posicionamento automatico de placas fotovoltaicas para a geracao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Alceu F.; Cagnon, Odivaldo Jose [Universidade Estadual Paulista (DEE/FEB/UNESP), Bauru, SP (Brazil). Fac. de Engenharia. Dept. de Engenharia Eletrica; Seraphin, Odivaldo Jose [Universidade Estadual Paulista (DER/FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Engenharia Rural

    2008-07-01

    This work presents an automatic positioning system for photovoltaic panels, in order to improve the conversion of solar energy to electric energy. A prototype with automatic movement was developed, and its efficiency in generating electric energy was compared to another one with the same characteristics, but fixed in space. Preliminary results point to a significant increase in efficiency, obtained from a simplified process of movement, in which sensors are not used to determine the apparent sun's position, but instead of it, the relative Sun-Earth's position equations are used. An innovative movement mechanical system is also presented, using two stepper motors to move the panel along two-axis, but with independent movement, contributing, this way, to save energy during the positioning times. The use of this proposed system in rural areas is suggested. (author)

  16. Performance of the tariffs of a single-phase electric energy meter, type electronic, operating with non-linear loads; Desempenho tarifario do medidor monofasico de energia eletrica do tipo eletronico operando com cargas nao-lineares

    Energy Technology Data Exchange (ETDEWEB)

    Santos, G.B.; Pinheiro Neto, D.; Lisita, L.R.; Machado, P.C.M.; Oliveira, J.V.M. [Universidade Federal de Goias (UFG), Goiania, GO (Brazil). Escola de Engenharia Eletrica e de Computacao], Emails: guilhermebsantos@gmail.com, daywes@gmail.com, lrlisi-ta@gmail.com, pcesar@eee.ufg.br, joao.eee@gmail.com

    2009-07-01

    This paper analyzes the behavior of a electronic meter of single-phase in the laboratory when it is subjected to a environment with linear loads and nonlinear loads kind residential and commercial. It differs from correlated studies mainly for making use of real loads encountered in day-to-day, rather than as sources of electronic loads how has been observed in the state of the art. The comparison of results is made based on high precision energy pattern developed by virtual instrumentation means.

  17. Proposal for creation of a small producer of electric power to the care of isolated communities; Proposta de criacao do pequeno produtor de energia eletrica para o atendimento de comunidades isoladas

    Energy Technology Data Exchange (ETDEWEB)

    Parente, Vicente Gomes; Bortoni, Edson da Costa [Ministerio de Minas e Energia, Brasilia, DF (Brazil); Haddad, Jamil [Universidade Federal de Itajuba, MG (Brazil)

    2008-07-01

    The absence of a legal order regarding to the small-sized generation and distribution enterprises impede the power supplying of areas of noticeable interest, such as Amazon communities and national security areas, which depends on distribution network expansion, sometimes without economical feasibility. For such cases, this work proposes the creation of the small energy producer, which congregates the prerogatives of the Independent- and the self- producers of energy and, moreover, the small distribution systems. (author)

  18. Studies of the potential for electric power conservation into a large data processing center; Estudos das potencialidades de conservacao de energia eletrica em um centro de processamento de dados de grande porte

    Energy Technology Data Exchange (ETDEWEB)

    Cassula, A.M.; Freire Junior, J.C. [Universidade Estadual Paulista (FEG/UNESP), Guaratingueta, SP (Brazil). Fac. de Engenharia. Dept. de Engenharia Eletrica], Emails: agnelo@feg.unesp.br, Jose-Celso.Freire@feg.unesp.br; Consorte, M.F. [Instituto Tecnologico de Aeronautica (ITA/CTA), Sao Jose dos Campos, SP (Brazil)], Email: mconsorte@gmail.com

    2009-07-01

    The present work aims to find the potentialities for energy conservation in a large Data Processing Center, through an analysis of the operation and control of the cooling air from the server room. An important aspect is that the DPC must necessarily work within the limits of temperature and therefore the demand control should be scheduled taking into account this restriction. Other aggravating factor is that the DPC in question is responsible for providing services for all of Latin America, operating twenty-four hours seven days a week. The study aims to examine possible improvements by applying the concept of energy efficiency, which is based on reducing the cost of electric power without affecting the reliability and quality of the final services. A case study will be presented containing simulations of the operation of the proposed demand control, where it will be possible to select the best option for the demand to be contracted with the energy provider.

  19. Techniques of artificial intelligence applied to the electric power expansion distribution system planning problem; Tecnicas de inteligencia artificial aplicadas ao problema de planejamento da expansao do sistema de distribuicao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Froes, Salete Maria

    1996-07-01

    A tool named Constrained Decision Problem (CDP), which is based on Artificial Intelligence and a specific application to Distribution System Planning is described. The CDP allows multiple objective optimization that does not, necessarily, result in a single optimal solution. First, a literature review covers published works related to Artificial Intelligence applications to Electric Power Distribution Systems, emphasizing feeder restoration and reconfiguration. Some concepts related to Artificial Intelligence are described, with particular attention to Planning and to Constrained Decision Problems. Following, an Electric Power System planning model is addressed by using the CDP tool. Some case studies illustrate the Distribution Planning model, which are compared with standard optimization models. Concluding, some comments establishing the possibilities of CDP applications are followed by a view on future developments. (author)

  20. Use of sewage treatment biogas for electric generation using an 30 kW (ISO); Uso do biogas de tratamento de esgoto, para geracao de energia eletrica, utilizando-se de uma microturbina de 30 kW (ISO)

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani T.; Velazquez, Silvia M.S.G.; Martins, Osvaldo S.; Costa, David F. [Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil); Bacic, Antonio C.K. [Companhia de Saneamento Basico do Estado de Sao Paulo (SABESP), SP (Brazil)

    2004-07-01

    This paper intends to present some considerations directed to electricity generation with 30 kW (ISO) micro turbines, using biogas generated by sewage treatment process in SABESP (Basic Sanitation Company of Sao Paulo State), located at Barueri, Brazil. This project, pioneer in Latin America, is being accomplished together with BUN - Biomass Users Network of Brazil (proponent), in association with CENBIO - The Brazilian Reference Center on Biomass (executer), with patronage of FINEP / CT-ENERG (financial backer), by means of ACCORD No: 23.01.0653.00, regarding to ENERG-BIOG Project - 'Installation and Tests of an Electric Energy Generation Demonstration Unit from Biogas Sewage Treatment'. Thus, the contribution of this paper will be in the presentation of the project results, related with the exploitation of sewer biogas for power generation, as well as bigger details about purification, compression and electricity generation systems (biogas micro turbine) used in the installation. (author)

  1. Application of either gas or diesel generator group in peak time (economy in electric energy expenses); Aplicacao de grupo gerador diesel ou gas nos horarios de ponta (economia nos gastos com energia eletrica)

    Energy Technology Data Exchange (ETDEWEB)

    Pereto, Antonio Soares [SABESP - Companhia de Saneamento Basico do Estado de Sao Paulo , SP (Brazil)

    1998-07-01

    This paper intend to demonstrate the results obtained with electric power expenses by applying electric energy generator groups during peak time in the Basic Sanitation Company of the Sao Paulo state, B R.

  2. Consumption of productive electric power and value of agricultural production in Botucatu region; O consumo de energia eletrica produtiva e o valor da producao agropecuaria na regiao de Botucatu

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Paulo Andre de [Universidade Estadual Paulista (UNESP), Botucatu, SP (Brazil). Faculdade de Ciencias Agronomicas. Programa de Pos-Graduacao em Agronomia], e-mail: pauloandre@fca.unesp.br; Simon, Elias Jose [Universidade Estadual Paulista (UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Gestao e Tecnologia Agroindustrial], e-mail: ejsimon@fca.unesp.br

    2004-07-01

    This paper objective was to settle the electric energy consumption in the countryside and the agriculture and cattle raisin production value in the counties of the Rural Development Office (EDR) of Botucatu, in the period of 1990 to 2000, trying to establish an analysis pattern to do future studies in other regions. This pattern could be used as an analysis instrument to make decisions to implement programs that look for an increase of use of electric energy as an input to join value to the rural product. In conclusion the data adjoined as EDR region do not present enough information to the relation between the production rough value and the electric energy consumption, being necessary, therefore, its disaggregation in counties. (author)

  3. The supply expansion of electricity in Brazilian urban centers through connected photovoltaic systems' network; A expansao da oferta de energia eletrica nos centros urbanos brasileiros por meio de sistemas fotovoltaicos conectados a rede

    Energy Technology Data Exchange (ETDEWEB)

    Benedito, Ricardo da Silva; Zilles, Roberto [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Inst. de Eletrotecnica e Energia. Lab. de Sistemas Fotovoltaicos

    2010-07-01

    This paper aims to outline perspectives on the electricity production through Grid-Connected Photovoltaic Systems (GCPS), in Brazil, and its insertion on a large scale in the energy matrix, as a supplementary power generation source. The GCPS bring several benefits to the Electrical Sector and the environment by producing energy cleanly and quietly in the places of consumption, avoiding the construction of large power plants and avoiding additional costs with transmission and distribution. In general, these systems can be integrated into the buildings architecture, taking advantage of the rooftop of pre-existing buildings. But, although it has high solar potential, Brazil had been installed a capacity of only 161.32 kWp GCPS until December 2009, a value considered negligible compared, for instance, with 4.5 GWp installed in Europe alone in 2008. This study shows that the cost of generation from a GCPS is still high, reaching to 2.4 times higher than the average residential tariff practiced in Brazil, which turns the technology impracticable commercially. But it shows a trend of equalization between these two values in the next decade for various locations, which will certainly make the GCPS to be considered as an alternative for expanding the energy supply. But for the lack of appropriate technical criteria do not affect the spread of this technology in the future, it is necessary a correct regulation of this activity by the staff of the Electrical Sector. (author)

  4. Unit installation and testing of demonstration of electric power generation using biogas from sewage treatment; Instalacao e testes de uma unidade de demonstracao de geracao de energia eletrica a partir de biogas de tratamento de esgoto

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Gonzalez Velazquez, Silvia Maria Stortini; Martins, Osvaldo Stella; Costa, David Freire da; Basaglia, Fernando [Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil)], e-mail: suani@iee.usp.br, e-mail: sgvelaz@iee.usp.br, e-mail: omartins@iee.usp.br, e-mail: davidcosta@iee.usp.br, e-mail: basaglia@iee.usp.br; Bacic, Antonio Carlos K. [Companhia de Saneamento Basico do Estado de Sao Paulo (SABESP), SP (Brazil)], e-mail: acbacic@sabesp.com.br

    2004-07-01

    This article intend to discuss the electricity generation with 30 kW (ISO) micro turbines, using biogas generated by sewage treatment process at SABESP (Basic Sanitation Company of Sao Paulo State), located at Barueri, Brazil. This project, pioneer in Latin America, is being accomplished together with BUN - Biomass Users Network of Brazil (proponent), by CENBIO - Brazilian Reference Center on Biomass (executer), with patronage of FINEP / CT-ENERG (financial backer), by means of COVENAT No: 23.01.0653.00, regarding to ENERG-BIOG Project - 'Installation and Tests of an Electric Energy Generation Demonstration Unit from Biogas Sewage Treatment'. This plant operates with anaerobic digestion process, which has as mainly products biogas (composed mainly by methane) and sludge. Currently, part of the methane produced is burnt in a boiler used to increase digesters efficiency process. The rest of the methane is burnt in flare to reduce the impacts caused by gases emissions. An alternative to flare it is the biogas conversion into electricity through engines and micro turbines. Thus, this article presents the project results, related with the exploitation of sewer biogas for power generation, as well as bigger details about purification, compression and electricity generation systems (biogas micro turbine), used in the facility. (author)

  5. Estimation of electric power generation using coal from the fruit peel of cupuassu in Amazonas State, Brazil; Estimativa de geracao de energia eletrica utilizando o carvao da casca do fruto do cupuacuzeiro no estado do Amazonas

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Antonio Cleuder Lima da [Manaus Energia S/A., Manaus, AM (Brazil); Santos, Eyde Cristiane Saraiva dos [Universidade Federal do Amazonas (FCA/UFAM), Manaus, AM (Brazil). Faculdade de Ciencias Agrarias. Dept. de Engenharia Agricola e Solos], e-mail: eyde_cristianne@yahoo.com.br

    2008-07-01

    The application of the charcoal of agroforestry residue for the generation of electric energy, for being renewable power plant and possessing technology for application, comes being evidenced. In this research the potential of generation of electric energy was estimated, in the main producing cities of the State of Amazonas of the fruit of the cupuacuzeiro (Theobroma grandiflorum Wild. Ex. Spreng. Shum.), using the rind carbonized in technology of gasification, substitution of diesel. The charcoal of the rind of the fruit of the cupuacuzeiro presents to be able calorific next to the one to the deriving coal of the wood. Known the annual production of each one the cities, the amount and the cost of production of the generated electric energy, determined in this research, it justifies the exploitation of this residue, for having economic advantages, when comparative with the tariff of the adopted electric energy in the region for the concessionaire. (author)

  6. Economic evaluation of photovoltaic electric power generation connected to the grid in deregulated electric power markets; Avaliacao economica da geracao de energia eletrica fotovoltaica conectada a rede em mercados eletricos desregulados

    Energy Technology Data Exchange (ETDEWEB)

    Zumaran, David Richard Orosco

    2000-12-01

    This work presents an analysis of economic, tariff and regulating issues related to the introduction of Grid Connected Photovoltaic Systems in a deregulated electric market context; a case study for the peruvian electric market is realized. Based on the pricing system of the electric market, it is developed an economic assessment model that can be used by institutions interested in promoting this technology for generating electricity. (author)

  7. Electric energy production and environmental licensing: citizenship in Brazil in time of ecological crisis; Producao de energia eletrica e licenciamento ambiental: cidadania no Brasil em tempo de crise ecologica

    Energy Technology Data Exchange (ETDEWEB)

    Bettencourt, Marcia Pires da Luz

    2017-11-01

    The choices of energy sources gain relevance in the face of the ecological crisis which has a central questioning on the modes of production and consumption and that stems from a system which changes everything into merchandise. On one hand, brazilian electricity generation has the advantage of using clean energy in great part of its composition, at least in discourse. On the other hand, though, there are high social and environmental costs, especially for communities living near the regions where projects for the electricity sector are built. This research aimed to identify and analyse different modes society takes part in the process of choosing energy sources for electricity generation in Brazil. It discusses the links between the ecological crisis and the production of electrical energy; how the institutional mechanisms for social participation on issues related to the production of electric power in Brazil work; and, how civil society participates in environmental licensing in the National Environment Council (CONAMA). A set of related approaches to the nature of the ecological crisis and the forms of social participation was adopted in the theoretical framework and an analysis of the electric sector panorama in Brazil has been drawn up. In order to investigate the forms society participates in issues related to the composition of the brazilian electricity matrix, the methodology comprised a documentary analysis and a case study. They included three categories of actors: (1) CONAMA's councilors, (2) experts from the Field; and (3) actors involved in the diagnosis study, planning and management of the electricity sector. The research identified inconsistencies, ambiguities and other relevant issues about the participation of society in the production of electrical energy. Such issues are related to: deficiencies in the mechanisms for information access; lack of transparency and patterns in internal documents; lack of social participation in the elaboration of international commitments; absence of participation of the society in institutionalized spaces; absence of representation of the society and specialists in the National Energy Policy Council (CNPE); invisibility of the discussion on possible impacts and social conflicts; lack of diversity's representation; deficiency in minority participation; lack of citizenship education initiatives focused on energy issue; absence of debates on energy production versus consumption; problems arising from developmental choice of Government decisions (even if implied). At the end, the present research offer suggestions for the improvement of this process, from the perspective of three key issues identified in this thesis: ecological crisis; electric power production; and social participation. The study concludes by pointing to the need of changes in the modes society' participate in the process of choosing energy sources for the electrical energy production at the federal level in Brazil. In addition, it proposes a reflection on the model of generation and consumption of electricity and a systematic evaluation of human consumption on natural resources. (author)

  8. Non-isolated DC-AC converter with high voltage gain for autonomous systems of electric power; Conversor CC-CA nao isolado com alto ganho de tensao para aplicacao em sistemas autonomos de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Silveira, George Cajazeiras [Centro Federal de Educacao Tecnologica do Ceara (CEFET/CE), Fortaleza, CE (Brazil); Torrico-Bascope, Rene P. [Universidade Federal do Ceara (PPGEE/UFC), Fortaleza, CE (Brazil). Programa de Pos Graduacao em Engenharia Eletrica; Borges Neto, Manuel Rangel [Centro Federal de Educacao Tecnologica de Petrolina (CEFET-PET), PE (Brazil)

    2008-07-01

    A non-isolated DC-AC converter with high voltage gain with two output sinusoidal voltage - 110 V and 220 V - and frequency 60 Hz for application in autonomous systems of electric power is proposed in this work. This topology consists of a boost converter with high voltage gain, based on three-state switching cell combined with a double half bridge inverter. This configuration type the size and the cost are reduced and the efficiency is gotten better, due to the reduced number of switches. The converters that compose this topology operate with high frequency, reducing the volume of the magnetic materials. can be mention as important characteristics: the voltage stress across the switches of the boost converter are low, due they be naturally clamped by one output filter capacitor, which allows the utilization of switches with lower conduction resistances, and the waveforms of the output voltage of the double half bridge inverter supplies for the load it is sinusoidal and it possesses low harmonic content. (author)

  9. Trading of the electric power originated at biomass - regulatory incentives in the new electric sector model; Comercializacao de energia eletrica proveniente de biomassa. Incentivos regulatorios no novo modelo do setor eletrico

    Energy Technology Data Exchange (ETDEWEB)

    Mariotoni, Carlos Alberto [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Faculdade de Engenharia Civil, Arquitetura e Urbanismo. Grupo de Planejamento Energeticos e Sistemas Eletricos]. E-mail: cam@fec.unicamp.br; Agapito, Cassiano Augusto; Lima, Rodrigo Alves [AES Tiete S.A., Sao Paulo, SP (Brazil)]. E-mails: cassiano.agapito@aes.com; rodrigoa.lima@aes.com

    2006-07-01

    Brazil offers excellent conditions to produce and use biomass as fuel in large scale. The electric energy generation from biomass presents a huge potential, however it is poorly explored up to this moment. Among the prime reasons by the lack of investments in that sector are the institutional obstacles and the risk aversion of investors who have a different focus in business and have difficulty to understand the complex market rules. The Brazilian government shows interest in increase the share of that source in the national installed capacity, since various social and environmental advantages, besides supplementary between the hydraulic and biomass inventory. The regulation changes since the law 10,848/04 and the decree 5,163/04 modify the structure of the electrical energy market and brought some incentives to the sells of the energy deriving from biomass. The possibility of trade your capacity, the annual Physical Guarantee definition and the reduction on transmission and distribution costs will be the center of our discussion. (author)

  10. Survey cost of electric power generation from renewable resources in the state of Goias, Brazil; Levantamento de custos da geracao de energia eletrica a partir de recursos renovaveis no estado de Goias

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Ronaldo Pereira de; Bortoni, Edson da Costa; Haddad, Jamil [Universidade Federal de Itajuba (UNIFEI), MG (Brazil)], emails: ronaldopa@gmail.com, bortoni@unifei.edu.br, jamil@unifei.edu.br

    2010-07-01

    The work presents a developed study to obtain the investment index costs for renewable based distributed generation in Goias state. A set of renewable resources was selected, along with their availability in each city of the state. Therefore, a rank of investments could be developed. (author)

  11. A methodology for extracting knowledge rules from artificial neural networks applied to forecast demand for electric power; Uma metodologia para extracao de regras de conhecimento a partir de redes neurais artificiais aplicadas para previsao de demanda por energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Steinmetz, Tarcisio; Souza, Glauber; Ferreira, Sandro; Santos, Jose V. Canto dos; Valiati, Joao [Universidade do Vale do Rio dos Sinos (PIPCA/UNISINOS), Sao Leopoldo, RS (Brazil). Programa de Pos-Graduacao em Computacao Aplicada], Emails: trsteinmetz@unisinos.br, gsouza@unisinos.br, sferreira, jvcanto@unisinos.br, jfvaliati@unisinos.br

    2009-07-01

    We present a methodology for the extraction of rules from Artificial Neural Networks (ANN) trained to forecast the electric load demand. The rules have the ability to express the knowledge regarding the behavior of load demand acquired by the ANN during the training process. The rules are presented to the user in an easy to read format, such as IF premise THEN consequence. Where premise relates to the input data submitted to the ANN (mapped as fuzzy sets), and consequence appears as a linear equation describing the output to be presented by the ANN, should the premise part holds true. Experimentation demonstrates the method's capacity for acquiring and presenting high quality rules from neural networks trained to forecast electric load demand for several amounts of time in the future. (author)

  12. Potential of exchange of electric power between the electric systems of Brazil and Argentina; Potencial de intercambio de energia eletrica entre os sistemas eletricos do Brasil e da Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Zanette, Andre Luiz [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil)

    2010-07-01

    Integration of power generation and transmission systems can provide a better utilization of energy resources and increase systems reliability. Given that Brazilian interconnection with Argentina, which represents the major Brazilian interconnection with neighboring countries, is used basically in winter months or in situations of unfavorable hydrology, this paper aims to demonstrate that power exchange between these two countries can be much higher than currently observed, resulting in greater benefits for producers and consumers of electricity in both countries, and that these benefits can also be obtained through better use of existing and planned interconnections between South American countries. To estimate the potential for power exchange between the electrical systems of Brazil and Argentina, three sets of simulations using the Brazilian Energy Plan (PDE 2010-2019) deck for Newave model, available from EPE, were made. These simulations consider the possibility that: (i) electricity is exported from Brazil to Argentina (II) electricity is imported from Argentina and (III) electricity is exchanged in both directions. The simulation results indicate that, despite rising operational marginal costs, significant amounts of electricity can be exported to Argentina at relatively low prices, depending on hydrological conditions. Moreover, the possibility of electricity imports from Argentina can reduce the operational costs of Brazilian system, as well as minimizing the risk of shortages. This work shows that the interconnections between Brazil and Argentina may be better used to benefit producers and consumers in both countries. Therefore, it is necessary to define an effective contractual and operational model for power trading and electricity transfer between these countries with the objective of promoting stability and mutual trust. Finally, studies to evaluate the potential for electricity exchange between South American countries are specially important, enabling better utilization of energy resources of each country and contributing to continent's energy integration. (author)

  13. Proposal planning of expansion of electric power generating facilities of Rio Grande do Sul in 2008-2030 period; Proposta de planejamento de expansao do parque gerador de energia eletrica do Rio Grande do Sul no periodo 2008-2030

    Energy Technology Data Exchange (ETDEWEB)

    Magayevski, Juliano; Santos, Joao Carlos Vernetti dos [Universidade Luterana do Brasil (PPGEAM/ULBRA), Gravatai, RS (Brazil). Programa de Pos-Graduacao em Engenharia, Energia, Ambiente e Materiais

    2010-07-01

    This work examines the indicators of wealth and its relations with the electricity demand for the State of Rio Grande do Sul, with a trend scenario and alternative scenarios for the electricity demand for the period 2008-2030. A capacity model was developed in order to estimate the increase of the installed capacity necessary to supply the foreseen demand. This model considers new additions of the power plants in implantation, planned and in study, from a base of information and data of the Ministry of Energy. Based on the comparison of the scenarios established with the developed model, are identified strangulations of power supply in the considered time for two of them, the participation of the primary sources capable to prevent them is explored and the total investment for realization of developed model and one established scenario that show strangulation, through hydroelectric plants, thermoelectric based on mineral coal and thermoelectric based on natural gas. (author)

  14. Evaluation of computational model for supervision and control of greenhouses in order to reduce the consumption of electrical energy; Avaliacao de modelo computacional para supervisao e controle de casas de vegetacao visando a reducao do consumo de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Laranjeira, Evandro Gomes; Rossi, Luis Antonio [Universidade Estadual de Campinas (FEAGRI/UNICAMP), SP (Brazil). Fac. de Engenharia Agricola

    2006-07-01

    Since a long time protected culture is a well-known technology and the increasing of biological knowledge and the new technologies development resulted in a great emphasis on climatic control. Nowadays there are several equipment in the market able to control the temperature, relative humidity, ventilation, solar radiation and artificial illumination as well. Difficulties are related to the manipulation of all these elements in an adequate way to reach the optimum climate conditions with a minimum resource and input expenses. In this project it was realized an climatic manager algorithm software evaluation using Fuzzy logic and climate models based on 'thermal loading calculation', psychrometry, managing the most common equipment available in the market with a minimum human intervention in the process. This Project has been made in two distinct structures and sorted technological levels. (author)

  15. Electrification of small rural properties in the Cangucu-Brazil city using alternative sources for electricity generation; Eletrificacao de pequenas propriedades rurais do municipio de Cangucu empregando fontes alternativas para a producao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Hecktheuer, Lucio Almeida [Rio Grande do Sul Univ., Porto Alegre, RS (Brazil). Nucleo de Energia

    1998-12-31

    This paper aims at specifying and measuring the main alternative electrification system components, such as solar and eolic, which make use of the property`s energetical potential that, to a small extent, do not represent pollution sources to the environment. The results indicated that, the small rural properties of Cangucu country, which present a low daily electric energy consumption, these alternative systems are able to technically and economically supply electric energy and provide reasonable subsidies to electrification projects which can eventually be developed in the country. (author) 4 refs., 2 figs., 5 tabs.

  16. The sector restructuring and the consequences on the planning and the marketing studies of the electric power distributors; A reestruturacao setorial e os reflexos sobre o planejamento e os estudos de mercado das distribuidoras de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Matsudo, Eduardo

    2001-05-15

    After the restructuring of the Brazilian power sector during the 1990's a new set of rules and players (regulators, traders, etc.) was introduced. This situation resulted in significantly impacting the distribution companies in terms of market risks and commercial opportunities. Electric power market assessments that provide fundamental information to the system and tariff planning groups can also be used to support the distribution companies in analyzing various questions within the new rules that have been created. These questions include such items as: how much energy should be contracted in the future in the wholesale market?; how much opportunity is available in offering commercial services to the customer?. This work describes the main changes that have occurred due to the restructuring, such as: the privatization process, a wholesale market implementation, rules for energy trading, and planning and regulatory process. The main challenges for distribution companies as a result of these changes are identified, especially focusing on energy trading in retail and wholesale markets. The process of electric power market assessments is presented and describing the accepted methodology used for demand forecasting for distribution companies. Information required by distribution companies in order to deal with the market challenges are specified - e.g. energy trading, market risks and customer relationship. It is concluded there is a need to obtain detailed information about consumers and to develop market forecast for specific time frame. It must take into consideration all the issues around the retail market - the study needs to analyze the basic factors that impact customer consumption. In order to improve the electric market assessment, it has been useful to apply specific models. After reviewing the existing tools for electric power market assessments (analysis and forecast), it has been found that the models that combined methods of end use analysis with scenario analysis are most effective. In this way, the distribution companies needs are met and the process also results in better market data for planning and regulatory agencies. (author)

  17. A vision about the professional qualification in the new Brazilian electric energy sector. Threats and opportunities; Uma visao sobre a formacao profissional nas empresas do novo setor de energia eletrica brasileiro. Ameacas e oportunidades

    Energy Technology Data Exchange (ETDEWEB)

    Matos Filho, Afranio B. de Alencar

    2001-07-01

    This work intends to examine which new qualification and abilities will be necessary to the electric power professional in the face of the deep changes that affects the energy market in the end of this century in Brazil.This question lead us to investigate, at the same time, two decisive points of the process: the energy sector restructuring that demands a new professional and the professional training translated in programs with information contents to attend this contemporary demand.

  18. The environmental and social impact of electric energy generation in villages and states of the interior of Amazonas state, Brazil; O impacto socio-ambiental da geracao de energia eletrica nas vilas e municipios do interior do estado do Amazonas

    Energy Technology Data Exchange (ETDEWEB)

    Teixeira, Andre Frazao; Cavaliero, Carla Kazue Nakao [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Planejamento de Sistemas Energeticos

    2004-07-01

    The interior of the State of Amazonas is nowadays socio and economically stagnant in consequence of various structural problems. The lack of a reliable source of electricity in these areas is one of these problems, and it has been causing several environment and social problems for the local population. To show, in a historic context, the consequences of this scenario to the country side of the State of Amazonas, is the goal of this article. (author)

  19. Electric power generation from biogas coming from sewer treatment using a 18 kW generator group; Geracao de energia eletrica a partir do biogas proveniente do tratamento de esgoto utilizando um grupo gerador de 18 kW

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Velazquez, Silvia Maria Stortini Gonzalez; Silva, Orlando Cristiano da; Abreu, Fernando Castro de [Universidade de Sao Paulo (USP), SP (Brazil). Inst. de Eletrotecnica e Energia. Centro Nacional de Referencia em Biomassa]. E-mail: suani@iee.usp.br; sgvelaz@iee.usp.br; gbntumbo@iee.usp.br; fcabreu@iee.usp.br

    2006-07-01

    The main objective of the effluent treatment is to correct its undesirable characteristics, however, during this process, residues like sludge and biogas are generated, and those residues can be used as raw materials. The PUREFA (Program of Rational Energy Use and Alternative Sources), compound by 14 purposes, is about a project of the USP - University of Sao Paulo, financial backer FINEP - Financier of Studies and Projects. This project had three main objectives: to implant measures of management and action of energy efficiency, to increase the distributed generation in the USP from the renewable resource and not conventional energy and to introduce incentive permanent politics to the efficient and rational use of energy. In the context, the Brazilian Reference Center on Biomass was responsible for two purposes, related to the biogas use for electricity generation. The first purpose had main objective to implant the generation system, to capture and to stock the biogas, produced by biodigestor in the Technological Hydraulically Center (CTH - USP). The biodigestor is a UASB (Upflow Anaerobic Sludge Blanket), whose outflow of the biogas produce is near 4 m{sup 3}/day, opera rates 24 hours per day and utilize the sewer from the residential buildings located in Sao Paulo University, inside the campus. For the biogas utilization, was made its outflow, chemical composition and heat value identifications, parameters that allowed to determinate the real potential for generation and to shown the necessity of the previous treatment, as H2S removal. Finished this stage, was started the next purpose, regarding biogas used as fuel for electricity generation using a generator group Otto cycle. Nowadays this project is a demonstrative project. In this article the technical and environmental project results obtained will be presented. (author)

  20. Rural development index: a contribution for the planning of the wide using of the access to electric power; Indicador de desenvolvimento rural: uma contribuicao para o planejamento da universalizacao do acesso a energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Giannini, Marcio; Souza, Danielle; Batista, Norma [Centro de Pesquisas de Energia Eletrica (CEPEL), Rio de Janeiro, RJ (Brazil)]. E-mails: giannini@cepel.br; dpires@cepel.br; norma@cepel.br; Camacho, Cristiane F.; Paz, Luciana; Rodrigues, Alexia [Fundacao Padre Leonel Franca (FPLF), Rio de Janeiro, RJ (Brazil)]. E-mails: ccamacho@cepel.br; lrocha@cepel.br; alexia@cepel.br

    2006-07-01

    This paper aims to present a methodology to be applied in the evaluation of projects of rural electrification including those related to the social, economic, energy and environmental areas. Based on the analysis of data collected in a large field research that covered all country, it was created the Rural Development Index (IDR) that seeks to summarize the acquired information to help in the evaluation and planning of the Electric Sector's actions concerned to the rural areas. Thus, it is presented the results of the methodology application in three Brazilian states during the two phases of the research, before and after the supply of electric energy in a regular and safe basis. (author)

  1. Suggestion for a hybrid neuro genetic system as an alternative for the assessment of electric power consumption curves; Sugestao de um sistema hibrido neuro-genetico como alternativa a avaliacao de curvas de consumo de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Masselli, Yvo Marcelo Chiaradia; Torres, Germano Lambert [Universidade Federal de Itajuba (UNIFEI), MG (Brazil)]. E-mails: ymcm@unifei.edu.br; germano@unifei.edu.br

    2006-07-01

    Increase the electrical distribution network quality it's a permanent interesting of energy companies. Therefore, quality services with acceptable values must be offers. In direct form this involves to manage efficiently all distribution system. Nowadays, this supervision is carried out with Geographic Information System (GIS) tools associate with calculation of demands transformers, result of correlation curve kWh versus KV A. Simple linear regression is used to estimate this curve, which make the process not too accuracy. To estimate consumers loads, the traditional methodology consider only end consumption, refusing the characteristic of different kinds of consumers: residential, commercial, industrial, rural and others. This paper present a model based hybridism between Artificial Neural Network (ANN) and Genetic Algorithm (GA), that can identify on load curve acquired any point of distribution system, the portions of consumption relatives to each one of main consumers sectors in that point. Besides, is suggested to the same application an ANN type Multi-Layer Perceptron, with the purpose to compare the showing results and to verify the advantages of hybridism use. The Hybrid System proposed use GA to the ANN training, in other words, the determination of best values to the ANN synaptic weights. Definite the work methodology, the practical valuation of the model starts, and the results presented by hybrid system are compared with those generates by ANN training by the conventional method well-know Back propagation Error (BP). The practical application propose that load curve acquired been analyze in any point of distribution system. Knowing this curve, the system should identify instant consumption quantities, relative to each one of main consumers sectors: industrial, commercial and residential. Subsequently are consider oscillations about these curves, in way to approach the real situation. The initial result indicated a best performance of conventional ANN, however when the complexity training patterns increased, the hybrid system started to present best results, showing your power. Made the necessary simulations and checked the validity of association between ANN with GA, the developed system can be consider a powerful tool to the distribution electrical network management. (author)

  2. Russian RSC Energia employees inspect DM in SSPF

    Science.gov (United States)

    1995-01-01

    Employees of the Russian aerospace company RSC Energia prepare to conduct final inspections of the Russian-built Docking Module in the Space Station Processing Facility at KSC. The module will fly as a primary payload on the second Space Shuttle/Mir space station docking mission, STS-74, which is now scheduled for liftoff in the fall of 1995. During the mission, the module will first be attached with the orbiter's robot arm to the Orbiter Docking System (ODS) in the payload bay of the orbiter Atlantis and then be docked with the Mir. When Atlantis undocks from the Mir, it will leave the new docking module permanently attached to the space station for use during future Shuttle Mir docking missions. The new module will simplify future Shuttle linkups with Mir by improving orbiter clearances when it serves as a bridge between the two space vehicles.

  3. Russian RSC Energia employees attach trunnions to DM

    Science.gov (United States)

    1995-01-01

    Employees of the Russian aerospace company RSC Energia attach trunnions to the Russian-built docking module in the Space Station Processing Facility at KSC so that it can be mounted in the payload bay of the Space Shuttle orbiter Atlantis. The module will fly as a primary payload on the second Space Shuttle/Mir space station docking mission, STS-74, which is now scheduled for liftoff in the fall of 1995. During the mission, the module will first be attached with the orbiter's robot arm to the Orbiter Docking System (ODS) in the payload bay of the orbiter Atlantis and then be docked with the Mir. When Atlantis undocks from the Mir, it will leave the new docking module permanently attached to the space station for use during future Shuttle Mir docking missions. The new module will simplify future Shuttle linkups with Mir by improving orbiter clearances when it serves as a bridge between the two space vehicles.

  4. EL ALTO MAGDALENA- COLOMBIA DE LA MANO CON ENERGIAS ALTERNATIVAS

    Directory of Open Access Journals (Sweden)

    Barragán-Alturo, Ancízar

    2013-12-01

    Full Text Available El afán por destruir un paradigma, que mantiene encadenados a los habitantes de Girardot y la región, a una compañía de distribución de la energía eléctrica con sus altos precios para el kilowatt-hora, ha inspirado la investigación CUNDINAMARCA DE LA MANO DE LAS ENERGIAS ALTERNATIVAS, demostrando por diversos caminos que el montaje de paneles solares para generación de energía eléctrica en las cubiertas de las casas es la energía alternativa para la solución de diversos problemas, entre ellos: los costos elevados, las fluctuaciones de voltaje, los cortes de energía, los daños en los electrodomésticos

  5. Subsurface microbial ecology. Epi fluorescence direct counts; Ecologia microbica del sottosuolo: metodo di conta diretta in epifluorescenza

    Energy Technology Data Exchange (ETDEWEB)

    Barra Caracciolo, A.; Silvestri, C.; Creo, C.; Izzo, G. [ENEA, Centro Ricerche Casaccia, Rome (Italy). Dipt. Ambiente

    1998-07-01

    To the aim of recognize the importance of microorganisms in affecting or even determining the fate of xenobiotics in the subsurface environment evaluating bacteria concentration in a subsurface ecosystem, the report discusses a soil sample treatment method which has been developed for epi fluorescence direct counting with DAPI. [Italian] Lo studio discute un metodo di trattamento del campione per la conta diretta in epifluorescenza con un marcatore selettivo per il DNA, il DAPI, al fine di quantificare la concentrazione batterica del sottosuolo e studiare il ruolo dei microrganismi nella biodegradazione delle molecole esogene, ancora poco indagato.

  6. Energy saving programs and renewable energies in Chihuahua, Mexico; Programas de ahorro de energia y energias renovables en Chihuahua, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Ibarra Noris, Jose Luis [Gobierno del Estado de Chihuahua (Mexico)

    2005-07-01

    The high index of economic and technological growth registered in the border zone of northern Mexico in the last years, has simultaneously caused an annual growth in the electrical energy demand in a percentage higher than 6%. In this document are included the economic and environmental impacts caused by the projects developed in the Chihuahua State on energy efficiency and on the available potential of renewable energies. In order to evaluate the environmental impact that is caused when saving electrical energy in the diverse projects in process, the emission of CO{sub 2} is the only emission taken into account (even though also emissions of SO{sub 2}, NO{sub 2} and Hg exist) for being this polluting agent the one that contributes in greater amount to the global warming and the greenhouse effect. The emission index of CO{sub 2} that we considered in this presentation is of 600 kg/mwh, on the basis of the type of fuel and volume of generation of the plants in operation of the Comision Federal de Electricidad (CFE) in the Chihuahua State. [Spanish] El alto indice de crecimiento economico y tecnologico registrado en la zona fronteriza del norte de Mexico en los ultimos anos, ha ocasionado paralelamente un crecimiento en la demanda de energia electrica superior al 6% anual. En este documento se incluyen los impactos economicos y ambientales de los proyectos que se desarrollan en el estado de Chihuahua en eficiencia energetica y en el potencial que se tiene de energias renovables. Para evaluar el impacto ambiental que se obtiene al ahorrar energia electrica en los diversos proyectos en proceso, se toma en cuenta unicamente emisiones de CO{sub 2} (aun cuando tambien existen emisiones de SO{sub 2}, NO{sub 2} y Hg) por ser este el contaminante que en mayor cantidad afecta al calentamiento global y al efecto invernadero. El indice de emisiones de CO{sub 2} que consideramos en esta presentacion es de 600 kg/mwh, en base al tipo de combustible y volumen de generacion de las

  7. Energy saving plan: use of solar energy in the university of Valencia (Spain); Uso de la energia solar en la universidad de Valencia (Espana) para ahorrar energia electrica

    Energy Technology Data Exchange (ETDEWEB)

    Gomez Gomez Amo, J.L.; Tena, F.; Martinez Lozano, J.A.; Utrillas, M.P. [Grupo de Radiacion Solar, Universidad de Valencia (Spain)

    2005-07-15

    The University of Valencia financed a pilot project that would study the installation's feasibility of a generating station with photovoltaic energy, solar type, in order to replace or complement conventional sources of energy. This paper presents some of the preliminary results of the study's application in an University building, along with the analysis of the initial situation and the proposals for the handling of reactive energy and the outer and inner lighting as solutions for energy saving. This experimental project entitled Study of the Energy Saving Strategies and the Viability of Installing Solar Energy equipment in the Buildings of the University of Valencia throws preliminary data specifying the amount of investment necessary to obtain real annual benefits, as well as the recovery time of the investment and the beneficial ecological impact in quantitative terms of a measurable CO{sub 2} reduction. [Spanish] La Universidad de Valencia financio un proyecto piloto que estudiaria la factibilidad de instalacion de una estacion generadora de energia fotovoltaica de tipo solar para sustituir o complementar fuentes convencionales de energia. Este trabajo presenta algunos de los resultados preliminares de la aplicacion del estudio en un edificio de la Universidad junto con el analisis de la situacion inicial y las propuestas del manejo de energia reactiva, de iluminacion exterior e interior como soluciones para el ahorro de energia. Este proyecto experimental titulado Estudio de las estrategias del ahorro de la energia y de la viabilidad de instalar energia solar en los edificios de la Universidad de Valencia arroja datos preliminares que especifican el monto de la inversion necesaria para obtener beneficios anuales reales, asi como el tiempo de recuperacion de la inversion y el impacto ecologico benefico en terminos cuantitativos de una reduccion cuantificable de CO{sub 2}.

  8. PERSPECTIVAS DE INSERÇÃO DA ENERGIA SOLAR FOTOVOLTAICA NA GERAÇÃO DE ENERGIA ELÉTRICA NO RIO GRANDE DO NORTE

    Directory of Open Access Journals (Sweden)

    Augusto César Fialho Wanderley

    2013-08-01

    Full Text Available A geração de energia elétrica no Brasil é predominantemente renovável, com a geração interna hidráulica sendo superior a 74% do total de sua matriz energética. O racionamento de energia elétrica ocorrido em 2001, devido à falta de chuvas, levou o país a incrementar a participação de fontes alternativas de energia. Esta necessidade por novas fontes de energia faz com que as potencialidades regionais sejam aproveitadas, o que configura a mudança do modelo de geração, passando de geração centralizada para geração distribuída. Dentre as fontes alternativas de energia, a solar apresenta-se como uma fonte bastante promissora para o Brasil, tendo em vista que a maior parte do seu território está localizada próximo à linha do equador, o que acarreta em um dia de maior duração solar. O Rio Grande do Norte (RN tem um dos maiores índices de incidência solar do território brasileiro, o que o torna apto a receber investimentos para a instalação de usinas solares fotovoltaicas. Este artigo analisará o potencial de geração da energia solar fotovoltaica no RN através de medições solarimétricas realizadas em Natal, capital do estado.

  9. Formulation of a projection model of electric power demand applied to isolated systems in natural development: the case of the brazilian electric company of Rondonia territory; Formulacao de um modelo de projecao de demanda de energia eletrica aplicado a sistemas isolados em desenvolvimento natural: o caso da CERON - Centrais Eletricas de Rondonia

    Energy Technology Data Exchange (ETDEWEB)

    Dourado, Rosana Aparecida

    2004-07-01

    The Electricity inserts it self more than other services in the economy and in the Brasilian society resulting an increase of market of electrical energy more than that of economy e consequently in the national energy bases. Given the importance of the definition of the demand of electrical energy inside the development process of a region, the objective of this dissertation is to propose a model of forecasting energy demand applied to a small scale utility. With basing on the foundation that the electrical energy demand varies accordingly with the region, social levels and economical conditions and also the activities developed, the method utilized was a definition of a set of representative variables in this context, using the relation between the population an the number of residential consumers; consumption per residential consumer and the consumption structure of the residential segment over the total demand. The results with the application of the model utilizing this philosophy of the technique of modeling scenes, permitted the definition of electrical energy demand for the market of the Brazilian electric company CERON S.A. like a case study. (author)

  10. A definition model of electric power tariff based on marginal cost: case study at CERON - the electric company of Rondonia, Brazil; Um modelo de definicao de tarifa de energia eletrica baseada no custo marginal: estudo de caso na CERON - Centrais Eletricas de Rondonia, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Domiciano, Jose Antonio

    2002-07-01

    The present competition circumstances (ambient) require enterprises (companies or undertaking) like CERON to have understanding of all conditions to propose tariffs which give correct signal the consumers. Objective. Thus, search for valuations of model to define the tariff of electric energy based on marginal cost though a study in case of CERON. Method. Develop an investigation of a model of definition of tariffs of electric energy based on marginal costs to start the study in case of CERON and followed by analysis of its tariff structure. Results. With application of the signal (sign or indication) of tariffs, can measure the degree of separation of tariffs and to propose new modalities of alternate tariffs which offer conditions to reflect the real form of costs imposed by clients who form subgroups of tariffs of CERON. With final results, it offers parameters to trace (seek) important strategy for the company. Conclusion: The model gives condition's to identify and quantify of subsidies inside the tariff structure. It is a base which permits to create alternatives to resolve tariff distortions. It permits to have a better understanding which category (class) of consumers who are free will try to seek companies with tariffs which reflect really its costs. (author)

  11. A definition model of electric power tariff based on marginal cost: case study at CERON - the electric company of Rondonia, Brazil; Um modelo de definicao de tarifa de energia eletrica baseada no custo marginal: estudo de caso na CERON - Centrais Eletricas de Rondonia, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Domiciano, Jose Antonio

    2002-07-01

    The present competition circumstances (ambient) require enterprises (companies or undertaking) like CERON to have understanding of all conditions to propose tariffs which give correct signal the consumers. Objective. Thus, search for valuations of model to define the tariff of electric energy based on marginal cost though a study in case of CERON. Method. Develop an investigation of a model of definition of tariffs of electric energy based on marginal costs to start the study in case of CERON and followed by analysis of its tariff structure. Results. With application of the signal (sign or indication) of tariffs, can measure the degree of separation of tariffs and to propose new modalities of alternate tariffs which offer conditions to reflect the real form of costs imposed by clients who form subgroups of tariffs of CERON. With final results, it offers parameters to trace (seek) important strategy for the company. Conclusion: The model gives condition's to identify and quantify of subsidies inside the tariff structure. It is a base which permits to create alternatives to resolve tariff distortions. It permits to have a better understanding which category (class) of consumers who are free will try to seek companies with tariffs which reflect really its costs. (author)

  12. Analytical study of the prospectives published by the Secretaria de Energia; Estudio analitico de las prospectivas publicadas por la Secretaria de Energia

    Energy Technology Data Exchange (ETDEWEB)

    Beltran Mora, Hector Alejandro; Urias Romero, Francisco [Facultad de Ingenieria, Universidad Nacional Autonoma de Mexico, Mexico, D.F. (Mexico)

    2004-06-15

    Since 1997 the Secretaria de Energia (SENER) publishes an annual report named Prospectiva del Sector Electrico, in which detailed information on the situation of the Mexican electrical sector is included, the information is related to the technological, economic and environmental aspects of all the organisms involved in the matter of electrical energy, within which stand out the Comision Federal de Electricidad (CFE), Luz y Fuerza del Centro (LyFC), the Comision Reguladora de Energia (CRE) and the Comision Nacional para el Ahorro de Energia (CONAE). In the prospectives the tendency of the modifications that will undergo the sector in a period of 10 years is analyzed. All the prospectives of the electrical sector, agree in that the growth of this sector is determined by the construction of power stations that use natural gas as primary energy, reason why we made an analysis of the prospectives of the natural gas market, with the purpose of observing the interaction between both sectors. At the moment seven prospectives of each sector have been published, given the conditions at the moment of their publication, they present differences and agreements between each other for periods of intersection. The present work shows the comparison between the expectations of growth reported by each one of the Prospectives. [Spanish] Desde 1997 la Secretaria de Energia (SENER) publica un reporte anual llamado Prospectiva del Sector Electrico, en el que se incluye informacion detallada sobre la situacion del sector electrico mexicano, la informacion esta relacionada con los aspectos tecnologicos, economicos y medioambientales de todos los organismos involucrados en materia de energia electrica, dentro de los cuales destacan la Comision Federal de Electricidad (CFE), Luz y Fuerza del Centro (LyFC), la Comision Reguladora de Energia (CRE) y la Comision Nacional para el Ahorro de Energia (CONAE). En las prospectivas se analiza la tendencia de las modificaciones que sufrira el sector

  13. Comparative Study of the Methods Used for the Computer Resolution of Composite Gamma-Ray Spectra; Etude Comparative des Methodes Utilisees pour la Resolution de Spectres Gamma Complexes au Moyen d'un Ordinateur; Sravnitel'noe izuchenie metodov razresheniya sostavnykh gamma-spektrov pri pomoshchi schetno-reshayushchego ustrojstva; Estudio Comparativo de los Metodos Aplicados para Resolver Espectros Gamma Complejos Mediante Calculadoras

    Energy Technology Data Exchange (ETDEWEB)

    DeHaan, A. Jr.; Leventhal, L.; Benson, P. [Tracerlab, Richmond, CA (United States)

    1965-10-15

    'a resolution; 2. Resolution du pic sans elimination; 3. Etablissement d'un ensemble d'equ'ations lineaires simultanees du meme ordre que le nombre de radionucleides presents dans le melange et solution de ces equations; 4. Evaluation des concentrations non connues par la methode des moindres carres, classique ou ponderee; 5. Combinaison des methodes statistiques et des methodes des moindres carres utilisant la regression lineaire multiple progressive, en s'efforcant d'integrer des processus decisifs dans l'analyse. Pour chaque methode d'analyse appliquee a des melanges de radionucleides, les auteurs fournissent une estimation statistique des erreurs de mesure de la concentration des radionucleides. (author) [Spanish] La resolucion de mezclas complejas de emisores gamma se ha simplificado gracias al empleo de espectrometros gamma muy perfeccionados en asociacion con calculadoras numericas. En la actualidad, los laboratorios pueden en general disponer de estos instrumentos o tener facilmente acceso a ellos. En la memoria se examinan los metodos seguidos en el laboratorio de los autores para determinar la concentracion de cada radionuclido emisor gamma contenido en muestras de precipitaciones radiactivas, y se comparan los resultados obtenidos por los diferentes metodos matematicos aplicables a las muestras compuestas. Los datos proporcionados por las calculadoras se comparan con los resultados obtenidos por analisis radioquimico de la muestra. Se han analizado muestras binarias por los metodos mencionados, operacion que se extendio despues a las mezclas integradas por muchos componentes. Se ha elaborado un metodo de computo que normaliza los espectros gamma para reducir al mfnimo el efecto de la deriva del espectrometro a largo plazo, y representa el espectro segun un sistema de coordenadas, una de las cuales es la energia. Se han investigado los efectos de un 'fotopico imprevisto', de una componente de intensidad cero y de picos superpuestos en la resolucion segun los

  14. Rapid Methods of Determining Internal Radioactive Contamination; Methodes Rapides Permettant d'Evaluer la Contamination Radioactive Interne; 0411 042b 0414 ; Metodos Rapidos para Determinar la Contaminacion Radiactiva Interna

    Energy Technology Data Exchange (ETDEWEB)

    Sedlet, J.; Fairman, W. D.; Robinson, J. J. [Industrial Hygiene and Safety Division, Argonne National Laboratory, Argonne, IL (United States)

    1965-06-15

    de rayos X in vivo, recuento gamma y de rayos X en muestras de excreta y de sangre no preparadas, y separacion radioquimica de la muestras de excreta y de la sangre, seguidas de recuento. Los autores examinan el campo de aplicacion, las restricciones y la sensibilidad de cada metodo, asi como el tiempo requerido para determinados radionuclidos, incluyendo actfnidos, productos de fision corrientes y emisores beta de baja energia. Indican los metodos aplicados con prioridad; un metodo se considera adecuado cuando permite detectar en algunas horas una dosis absorbida equivalente a la menor carga corporal admisible que especifica la Comision Internacional de Proteccion Radiologica. Aunque esta sensibilidad no es necesaria en todos los casos, deberia ser siempre suficiente y, en general, puede alcanzarse. Las mayores dificultades se encuentran con los emisores alfa y los emisores beta puros de baja energia ya que, en general, la carga corporal en estos nuclidos debe determinarse por analisis radioquimico de la sangre y los excreta. La memoria describe los procedimientos de separacion radioquimica desarrollados y utilizados en el Laboratorio Nacional de Argonne para la determinacion rapida de estos nuclidos. Por otra parte, la memoria examina algunos de los problemas que se plantean para calcular las cargas corporales poco despues de la absorcion a partir de los indices de excrecion. Durante este periodo, las concentraciones varian rapidamente y en forma desconocida para muchos nuclidos importantes. Cuando la absorcion ha sido muy elevada o muy reducida, no es necesario determinar inmediata y exactamente las cargas corporales. No obstante, existe para cada radionuclido un grado intermedio de absorcion que exige determinar rapidamente y con exactitud suficiente la carga corporal para decidir si es necesario proceder a un tratamiento. La memoria discute las propiedades y los factores que dificultan la valoracion de los elementos osteofilos en caso de accidente. (author

  15. 77 FR 23476 - Energia Sierra Juarez U.S., LLC; Supplemental Notice That Initial Market-Based Rate Filing...

    Science.gov (United States)

    2012-04-19

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. ER12-1470-000] Energia Sierra Juarez U.S., LLC; Supplemental Notice That Initial Market-Based Rate Filing Includes Request for... Energia Sierra Juarez U.S., LLC's application for market-based rate authority, with an accompanying rate...

  16. Gunnar Okk jääb vähemalt aastaks Eesti Energia etteotsa / Urmas Tooming

    Index Scriptorium Estoniae

    Tooming, Urmas

    2005-01-01

    Eesti Energia nõukogu otsustas, et Eesti Energia juhi kohale korraldatakse konkurss aasta pärast ning nõukogu esimees Urmas Sõõrumaa sai volituse juhatuse liikmetega läbi rääkida ja nende lepinguid aasta võrra pikendada. Lisa: Gunnar Oki töö

  17. Book Presentation: “L’Energia del vuoto” by Bruno Arpaia

    CERN Multimedia

    CERN Library

    2012-01-01

    “It is nighttime on a Swiss highway. A car travels at high speed, heading to Marseilles. Pietro Leone, UN Geneva civil servant, is at the wheel. His son Nico is asleep next to him. The two are fleeing from something unknown...   ... Pietro only knows that, for the past few days, someone has been discreetly following him and his family, and that his wife Emilia, a CERN researcher, vanished from home a few days before…” Would you like to know what happens next? The Library, in cooperation with the association “Cultura Italia”, is organizing a presentation of “L’energia del vuoto”. A brief introduction to this book will be followed by a debate among the participants. Bruno Arpaia, journalist, writer and translator, has written 3 novels and 4 political essays. “L’energia del vuoto” is his latest novel, inspired by a visit he paid to CERN.   “L’energia del...

  18. Interactive applications for energy saving; Aplicaciones interactivas para ahorro de energia

    Energy Technology Data Exchange (ETDEWEB)

    Adame Gonzalez, Alejandro; Ramirez Anaya, Cesar; Gutierrez, Hector; Dominguez Ojeda, Xerxes; Aguilar Galvan, Alfredo [Ingenieria Energetica Integral S. A. de C. V., Mexico, D. F. (Mexico)

    1998-12-31

    A series of ideas are presented that can help in the development of interactive applications for energy saving. Emphasis is made on the Fideicomiso de Apoyo al Programa de Ahorro de Energia (FIDE)`s Interactive Course on Demand Management and Power Factor Compensation, in order to demonstrate how far one can go with the multimedia development. [Espanol] Se presenta un conjunto de ideas que pueden auxiliar en la elaboracion de aplicaciones interactivas para ahorro de energia. Se hace principal enfasis sobre el curso interactivo Administracion de la Demanda y Compensacion del Factor de Potencia del Fideicomiso de Apoyo al Programa de Ahorro de Energia (FIDE) con la finalidad de mostrar hasta donde puede llegarse con un desarrollo multimedia.

  19. Interactive applications for energy saving; Aplicaciones interactivas para ahorro de energia

    Energy Technology Data Exchange (ETDEWEB)

    Adame Gonzalez, Alejandro; Ramirez Anaya, Cesar; Gutierrez, Hector; Dominguez Ojeda, Xerxes; Aguilar Galvan, Alfredo [Ingenieria Energetica Integral S. A. de C. V., Mexico, D. F. (Mexico)

    1999-12-31

    A series of ideas are presented that can help in the development of interactive applications for energy saving. Emphasis is made on the Fideicomiso de Apoyo al Programa de Ahorro de Energia (FIDE)`s Interactive Course on Demand Management and Power Factor Compensation, in order to demonstrate how far one can go with the multimedia development. [Espanol] Se presenta un conjunto de ideas que pueden auxiliar en la elaboracion de aplicaciones interactivas para ahorro de energia. Se hace principal enfasis sobre el curso interactivo Administracion de la Demanda y Compensacion del Factor de Potencia del Fideicomiso de Apoyo al Programa de Ahorro de Energia (FIDE) con la finalidad de mostrar hasta donde puede llegarse con un desarrollo multimedia.

  20. Energy saving, social and government communication; Ahorrro de energia, sociedad y comunicacion gubernamental

    Energy Technology Data Exchange (ETDEWEB)

    Morales Camarena, Francisco [Comision Nacional para el Ahorro de Energia, Mexico, D.F. (Mexico)

    2001-07-01

    The actions for the energy efficiency and the utilization of renewable energies are multiple and dispersed, in each one of the energy consumption points of the country. For this reason, two important factors to foment these actions are to promote the social participation and the effective government communication towards the society: energy saving and social participation. One of the main faculties of the National Commission of Energy Saving (CONAE) is to foment the efficiency in the energy use, through actions coordinated with the different agencies and organizations of the Federal Public Administration, with the governments of the federal entities and the municipalities and, through coordinated operations, with the private and social sectors. The CONAE has established mechanisms of coordination and cooperation with the private and social sectors, having fomented programs, projects and actions whose purpose is the energy efficiency, outstanding: 1) Committees and work groups; 2) Cooperation Agreements; 3) the Advisory Council for the Foment of Renewable Energy. [Spanish] Las acciones para la eficiencia energetica y el aprovechamiento de las energias renovables son multiples y dispersas, en cada uno de los puntos de consumo de energia del pais. Por ello, dos factores importantes para fomentar estas acciones son promover la participacion social y la comunicacion gubernamental eficaz hacia la sociedad: Ahorro de energia y participacion social. Una de las principales facultades de la Comision Nacional de Ahorro de Energia es fomentar la eficiencia en el uso de energia, a traves de acciones coordinadas con las diversas dependencias y entidades de la Administracion Publica Federal, con los gobiernos de las entidades federativas y de los municipios y, a traves de acciones concertadas, con los sectores social y privado. La CONAE ha establecido mecanismos de coordinacion y de cooperacion con los sectores privado y social, fomentando programas, proyectos y acciones cuyo

  1. Inovação e sustentabilidade na produção de energia: o caso do sistema setorial de energia eólica no Brasil

    Directory of Open Access Journals (Sweden)

    Thiago Cavalcante Nascimento

    Full Text Available Este artigo tem por objetivo verificar como as ações do sistema setorial brasileiro de energia eólica se relacionam com as perspectivas econômicas, sociais e ambientais que caracterizam inovações sustentáveis. Argumenta que as questões energéticas estão no cerne do desenvolvimento humano ao longo de sua história e que, em decorrência do atual cenário de mudanças climáticas, o desenvolvimento de fontes alternativas de energia é de vital importância na contemporaneidade. Metodologicamente, o estudo pode ser considerado exploratório e descritivo em relação aos fins e bibliográfico no que diz respeito aos meios. Foram utilizados dados primários de agências nacionais, regionais e mundiais de energia eólica para aumentar a consistência das informações coletadas e do trabalho como um todo. Os resultados evidenciam que o sistema setorial de energia eólica está estruturado em torno de uma série de instituições públicas, autarquias, associações de pesquisa e outros stakeholders que demonstram crescente interesse no desenvolvimento do setor no país. Os dados indicam, ainda, que os valores alcançados ao longo dos últimos leilões de energia eólica têm evidenciado o potencial de competitividade dessa fonte energética em comparação com as demais. Conclusivamente, é possível verificar que os pilares da sustentabilidade podem ser visualizados ao longo de praticamente todas as questões envolvendo a implantação de novas usinas eólicas, mas que a dimensão econômica ainda é a de maior destaque, tornando as dimensões sociais e ambientais dependentes da capacidade dessa modalidade de energia competir com outras.

  2. Energia solar aplicada al bombeig hidràulic en una central hidroelèctrica

    OpenAIRE

    Fernández Reig, Pau

    2015-01-01

    El present projecte té com a objectiu fonamental convertir la coberta d’una nau industrial en un element actiu de captació i transformació de l’energia fotovoltaica per a posteriorment ser utilitzada en l’accionament d’una bomba hidràulica que impulsarà aigua cap a un embassament superior, possibilitant-ne una futura obtenció d’energia elèctrica turbinant aquesta aigua que ha sigut bombejada. Si bé l’abast del projecte es centra fonamentalment en el polígon industrial de Berga i en la pres...

  3. Modelos para estimar as exigências de energia metabolizável para poedeiras

    OpenAIRE

    Sakomura,Nilva Kazue; Basaglia,Roberta; Sá-Fortes,Cristina M. L.; Fernandes,João Batista K.

    2005-01-01

    Objetivou-se, com este trabalho, elaborar um modelo para estimar as exigências de energia metabolizável (EM) para poedeiras leves da linhagem Lohmann LSL, utilizando-se o método fatorial. Para determinar o efeito da temperatura sobre as exigências de EM para mantença, foram conduzidos experimentos em câmaras climáticas com temperaturas constantes de 12, 22 e 31ºC, utilizando a técnica do abate comparativo. A exigência de energia líquida para o ganho de peso foi determinada por meio da regress...

  4. New business activities of Helsinki Energia; Helsinki Energian uusi liiketoiminta

    Energy Technology Data Exchange (ETDEWEB)

    Tuura, L.

    2001-07-01

    Helsinki Energia has started a new business activity - district cooling. The service is offered to cooling of large buildings, e.g. shopping centers, offices, etc. District cooling power is generated centrally at the power plant and the cooling power is transferred to the customer via separated distribution network. There are three main alternatives for production of district cooling power, mainly compressors, absorption devices and heat pumps. The operating energies required by them include electric power, district heat, steam, burning matter or some waste heat. The conditions for profitable district cooling are that the buildings to be cooled are built on a compact area at a reasonable distance from the district cool generation plant, that there enough need for district cool at the area, and that the district cool production plant is located at the seaside. Technically and economically reasonable construction of district cooling network requires that both the transmissions and distribution networks are as short as possible because the pipe dimensions are large, and because the streets are full of other infrastructure. Location near a sea ease the cooling of the district cool generation process, and especially, it is possible to use the coldness of the seawater directly via heat exchangers. The objective of district cool generation is to intensify the combined heat and power generation during warm seasons by reducing the electric power consumption and by increasing the utilization of surplus heat. It is also possible to reduce the use of harmful refrigerants. The district cooling activities of Helsinki Energia started in 1998 in Pitaejaenmaeki. Ruoholahti district cool system is the first larger area district cool project in Finland. The district cooling plant is constructed at the area of the Salmisaari power plant, hence the plant can utilize the present space and equipment of the power plant in generation of district cool. Energy needed for operation of the

  5. Energy from garbage; Energia a partir de la basura

    Energy Technology Data Exchange (ETDEWEB)

    Arvizu Fernandez, Jose Luis [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1997-12-31

    The subject of energy generation from garbage is discussed. A description is made of the sanitary fill, which is a system for the conversion or stabilization of garbage encompassing gas generation and lixiviates, these are collected to be used as fuels or a treatment process is applied to them avoiding this way the soil, water and air pollution; also a description is made of the utilization of a biogas recovery well, which recovers the biogas, cleans it from particles and condensates and afterwards feeds an internal combustion motor coupled to an electric generator. It is concluded that if the biogas generated by the buried garbage in the sanitary refills is utilized, the effects that cause the polluting emissions would be diminished and at the same time an additional energy resource would be on hand [Espanol] Se analiza el caso de la generacion de energia a partir de la basura. Se describe la tecnologia de relleno sanitario, la cual es un sistema de conversion o estabilizacion de la basura en el que existe generacion de biogas y lixiviados, estos se capturan para usarlos como combustibles o se les da un proceso de tratamiento y asi se evita la contaminacion del suelo, agua y aire; tambien se describe la utilizacion de un pozo de recuperacion de biogas, el cual recupera el biogas, lo limpia de particulas y condensados y despues alimenta a un motor de combustion interna acoplado a un generador. Se concluye en que si se aprovecha el biogas generado por la basura enterrada en rellenos sanitarios se diminuiran los efectos que causan las emisiones contaminantes y al mismo tiempo se tendria un recurso energetico adicional

  6. Energy from garbage; Energia a partir de la basura

    Energy Technology Data Exchange (ETDEWEB)

    Arvizu Fernandez, Jose Luis [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-12-31

    The subject of energy generation from garbage is discussed. A description is made of the sanitary fill, which is a system for the conversion or stabilization of garbage encompassing gas generation and lixiviates, these are collected to be used as fuels or a treatment process is applied to them avoiding this way the soil, water and air pollution; also a description is made of the utilization of a biogas recovery well, which recovers the biogas, cleans it from particles and condensates and afterwards feeds an internal combustion motor coupled to an electric generator. It is concluded that if the biogas generated by the buried garbage in the sanitary refills is utilized, the effects that cause the polluting emissions would be diminished and at the same time an additional energy resource would be on hand [Espanol] Se analiza el caso de la generacion de energia a partir de la basura. Se describe la tecnologia de relleno sanitario, la cual es un sistema de conversion o estabilizacion de la basura en el que existe generacion de biogas y lixiviados, estos se capturan para usarlos como combustibles o se les da un proceso de tratamiento y asi se evita la contaminacion del suelo, agua y aire; tambien se describe la utilizacion de un pozo de recuperacion de biogas, el cual recupera el biogas, lo limpia de particulas y condensados y despues alimenta a un motor de combustion interna acoplado a un generador. Se concluye en que si se aprovecha el biogas generado por la basura enterrada en rellenos sanitarios se diminuiran los efectos que causan las emisiones contaminantes y al mismo tiempo se tendria un recurso energetico adicional

  7. ENERGIA FÓSSIL: implantação de refletores na quadra de esportes, utilizando energia fóssil

    Directory of Open Access Journals (Sweden)

    Alisson Mazzola

    2011-07-01

    Full Text Available O presente projeto consiste na utilização da energia fóssil para aplicar melhorias na quadra desportiva da escola Oswaldo Cruz, localizada na cidade de Sinop/MT.Tais melhorias poderão ser vistas na iluminação, tomadas e acessibilidade. Todavia, isto irá trazer benefícios para toda a sociedade, como acontecimento de eventos esportivos, lúdicos e sua utilização no período noturno.A energia fornecida para a quadra será através de um motor a combustão (gasolina, que será menos poluente, pois os hidrocarbonetos da gasolina poluem menos que do óleo diesel.Assim será produzido 15 horas de iluminação por cada tanque do motor. 

  8. Method to allow the estimation of heat transfer coefficients in solar stills; Metodo para determinar coeficientes locales de transferencia de calor en destiladores solares

    Energy Technology Data Exchange (ETDEWEB)

    Rubio Cerda, Eduardo; Porta Gandara, Miguel A [CIBNOR, Mexico D.F (Mexico); Fernandez Zayas, Jose Luis [UNAM Mexico, D.F. (Mexico)

    2000-07-01

    This work reports an experimental method that allows to estimate the heat transfer coefficients in the neighborhood of walls or flat plates subject to convective transport phenomena. This method can be applied to a great variety of thermal systems since it is based on the knowledge of the border condition for the temperature at the surface of the plate, and the temperature profile that characterize the dimensionless coefficient of heat transfer in the fluid, according to its definition given by the Nusselt number. The approach of this work are the foundations of the method and the system that has been developed to apply it, that incorporates automatic acquisition equipment for continuos monitoring of the information and elements to control the parameters of interest. In addition, the experimental cavities on which the method will be evaluated are discussed, considering two different scales, as well as experiments in cavities filled with air, and with a mixture of air and steam water, as is the case for solar distillation. [Spanish] En este trabajo se presenta un metodo que permite determinar de manera experimental coeficientes de transferencia de calor por conveccion. Este metodo puede ser aplicado a una gran variedad de sistemas termicos ya que se fundamenta en el conocimiento de la condicion de frontera para la temperatura en la superficie de la placa, y del perfil de temperaturas que caracteriza el coeficiente adimensional de transferencia de calor en el fluido, de acuerdo a la definicion de este, dada por el numero de Nusselt. El trabajo que aqui se reporta esta enfocado a la fundamentacion del metodo y al equipamiento que se ha desarrollado para instrumentarlo, que incorpora equipos automaticos de adquisicion continua de informacion y elementos de control para los parametros de interes. Se presentan ademas, las cavidades experimentales sobre las que sera evaluado el metodo, que considera dos escalas diferentes, asi como experimentos en cavidades llenas de aire

  9. KIT EDUCACIONAL PARA ESTUDO DE GERAÇÃO ELÉTRICA A PARTIR DE ENERGIA EÓLICA

    Directory of Open Access Journals (Sweden)

    Antonio Luiz P. S. Campos

    2010-09-01

    Full Text Available Vários estudos desenvolvidos nos últimos anos apontam para as implicações e impactos sócio-ambientais do consumo de energia. Fontes de energias renováveis são apresentadas como alternativa para atender as demandas da sociedade com qualidade, segurança e redução dos danos ambientais decorrentes do consumo de energia. Este artigo apresenta uma proposta de kit educacional para ensino do uso de energia eólica na geração de energia elétrica. Inicialmente, o artigo descreve a evolução do aproveitamento da energia eólica. Depois, o artigo apresenta algumas experiências sobre o ensino desse tipo de energia no ensino médio e superior. O kit educacional é apresentado, mostrando-se resultados obtidos com o aerogerador tais como tensão gerada e circuitos eletrônicos utilizados. Algumas práticas são sugeridas. Por fim, as principais conclusões acerca do sistema são apresentadas.

  10. Renewable energy: Political momentum and technology for a sustainable Mexico; Energias Renovables: Impulso politico y tecnologico para un Mexico sustentable

    Energy Technology Data Exchange (ETDEWEB)

    Romero Hernandez, Sergio; Romero Hernandez, Omar; Wood, Duncan [Instituto Tecnologico Autonomo de Mexico (ITAM) (Mexico)

    2011-04-15

    The renewable energy sector in Mexico, as shown in this book, is alive and in good condition, prospers and has great potential. In this regard, it is essential that Mexico sees itself as a country with an energy future beyond Cantarell, beyond Pemex and beyond oil. The future of renewable energy offers great hope for the country and the region, and the time is right for a consensus government, business and social more strongly boost the development of this sector. This book discusses the following topics: Renewable energy and sustainable economic development, the regulatory framework for the use of renewable energy, hydropower, bioenergy, Part I: biomass and biogas, bioenergy, Part II: Liquid biofuels; elements for promotion of wind energy in Mexico, geothermal energy, solar PV, solar thermal and micro. [Spanish] El sector de la energia renovable en Mexico, como se muestra en este libro, esta vivo y en buenas condiciones, prospera y tiene gran potencial. En ese sentido, resulta indispensable que Mexico se vea a si mismo como un pais con un futuro energetico mas alla de Cantarell, mas alla de PEMEX, mas alla del petroleo. El futuro de la energia renovable ofrece una gran esperanza para el pais y la region, y el tiempo es adecuado para que una concertacion gubernamental, empresarial y social impulse con mas fuerza el desarrollo de este sector. En este libro se analizan los siguientes temas: Energias renovables y desarrollo economico sustentable; el marco normativo de la utilizacion de las energias renovables; energia hidroelectrica; bioenergia, parte I: biomasa y biogas; bioenergia, parte II: biocombustibles liquidos; elementos para la promocion de la energia eolica en Mexico; energia geotermica; energia solar fotovoltaica; energia solar termica, y la microgeneracion.

  11. Electric power universalization: a political analysis of the energy distribution and its socio-environmental importance for the Amazon state, Brazil; Universalizacao da energia eletrica: uma analise politica da distribuicao de energia e da sua importancia socio-ambiental para o Amazonas

    Energy Technology Data Exchange (ETDEWEB)

    Valois Coelho, Ilsa Maria [Centro Universitario Nilton Lins, Manaus, AM (Brazil)], e-mail: Ivalois@horizon.com.br; Cartaxo, Elizabeth Ferreira [Universidade Federal do Amazonas (UFAM), Manaus, AM (Brazil)], e-mail: Ecartaxo@ufam.edu.br

    2004-07-01

    The global distribution of electric energy in this article, attend to the electric and social exclusion and to regional inequalities in developing countries, with the objective to put up arguments about the question of the social and environmental injustice. It considers the need to plan the balance between the nature budget and the society budget without forgetting the fundamental principles of the thermodynamic and powerful interests involved. Alert to dangers of the exploit the natural resources looking for more energy. Although, the article shows up, the importance of the energy in developing societies. It gives information from IBGE and MME, about the relation between electric exclusion and social exclusion, calling attention to the impossibility to see concrete solutions, out of the social-economic context. Difficulties to construct Amazon indicators were improved on partly by own estimate, because the importance of the Amazon region to the environmental sustainability and the demographic, social and economic difficulties to the electric energy distribution for all Brazilian people. (author)

  12. Load curve modelling of the residential segment electric power consumption applying a demand side energy management program; Modelagem da curva de carga das faixas de consumo de energia eletrica residencial a partir da aplicacao de um programa de gerenciamento de energia pelo lado da demanda

    Energy Technology Data Exchange (ETDEWEB)

    Rahde, Sergio Barbosa [Pontificia Univ. Catolica do Rio Grande do Sul, Porto Alegre (Brazil). Dept. de Engenharia Mecanica e Mecatronica]. E-mail: sergio@em.pucrs.br; Kaehler, Jose Wagner [Pontificia Univ. Catolica do Rio Grande do Sul, Porto Alegre (Brazil). Faculdade de Engenharia]. E-mail: kaehlerjw@pucrs.br

    2000-07-01

    The dissertation aims to offer a current vision on the use of electrical energy inside CEEE's newly defined area of operation. It also intends to propose different alternatives to set up a Demand Side Management (DSM) project to be carried out on the same market segment, through a Residential Load Management program. Starting from studies developed by DNAEE (the Brazilian federal government's agency for electrical energy), to establish the load curve characteristics, as well as from a research on electrical equipment ownership and electricity consumption habits, along with the contribution supplied by other utilities, especially in the US, an evaluation is offered, concerning several approaches to residential energy management, setting up conditions that simulate the residential segment's scenarios and their influence on the general system's load. (author)

  13. Agreements for energy and environment; Patto per l'energia e l'ambiente

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-07-01

    In this paper are reported in ambit of italian national conference of energy and environment, an agreement undersigned by deputy of political and social forces. [Italian] In questo documento e' illustrato il patto per l'energia e l'ambiente cui hanno aderito forze sociali e politiche del paese.

  14. Fundamentos e métodos de medidas de energia dinâmica no SPT

    Directory of Open Access Journals (Sweden)

    Antonio Belincanta

    2000-05-01

    Full Text Available Discutem-se neste trabalho os métodos disponíveis no Brasil e no exterior para a medida da energia transferida às hastes no SPT, apresentando-se inclusive registros típicos dos eventos dinâmicos correspondentes

  15. Eesti Energia jätkab PR-kampaaniaga / Lembit Kaljuvee

    Index Scriptorium Estoniae

    Kaljuvee, Lembit, 1952-

    2009-01-01

    Riigikogu liige ja Eesti Põlevkivi juhatuse endine liige peab Eesti Energia börsile viimist majandusloogiliselt õigeks sammuks, kuid viitab börsile viimisega seotud riskidele. Tema väitel ei ole ettevõttes järgmisel aastal investeeringurahaga midagi peale hakata, sest pole tööks kõlblikke reaalseid projekte

  16. Elagu eesti energia : Jaan ja Jüri Ojaver, Paul Rodgers / Reet Varblane

    Index Scriptorium Estoniae

    Varblane, Reet, 1952-

    2001-01-01

    Paul Rodgersi, Jüri ja Jaan Ojaveri ühisnäitusest "Koostöö" Rakvere Kesklinna galeriis. P. Rodgersilt ja Jüri Ojaverilt on väljas Viinist "Eesti energia" näituselt naasnud tööd, Jaan Ojaverilt minimalistlikud tööriistad-objektid

  17. Centro de Energia Nuclear na Agricultura (CENA) - Sao Paulo, Brazil, - Annual report, 1978

    International Nuclear Information System (INIS)

    Anon.

    The activities carried out at 'Centro de Energia Nuclear na Agricultura (CENA) S.P., Brazil, in 1978 are related, such as : development of research on the use of radioisotopes in crop improvement and plant breeding, as well as in the improvement of animal production; works in collaboration with other entities; personnel formation and scientific exchange with other countries. (M.A.) [pt

  18. Eesti Energia jääb riigi monopoliks / Andres Reimer

    Index Scriptorium Estoniae

    Reimer, Andres

    2002-01-01

    Valitsus otsustas katta elektri hinna tõusu 5-10 sendise kärpe Euroopa Liidu abirahade ja laenudega, loobudes Eesti Energia aktsiate börsile viimisest ja säilitades ettevõtte monopoli. Kommenteerib majandusministri nõunik Heido Vitsur

  19. Eesti Energia salatseb IPO eeltööde hinnaga / Jan Jõgis-Laats

    Index Scriptorium Estoniae

    Jõgis-Laats, Jan

    2010-01-01

    Eesti Energia juhatuse esimehe Sandor Liive väitel oli ettevõtte börsilemineku ettevalmistamise kulude suurusjärk kümnetes miljonites kroonides, suurimad kulutused tehti õigus- ja majandusanalüüsile. Eesti Energiat nõustanud firmad

  20. Eesti Energia : investeerimata oleme varsti hädas / Krista Taim, Allar Viivik

    Index Scriptorium Estoniae

    Taim, Krista

    2004-01-01

    Eesti Energia nõukogu kinnitas ettevõtte investeeringutekava aastani 2018, 15 aasta jooksul tuleb investeerida 46 miljardit krooni, rahastamisallikatena nähakse välislaenu, riigi abi või hinnatõusu. Kommenteerivad Eiki Nestor ja Marika Tuus

  1. Energiasõltumatuse ohtlik fantaasia / A. F. Alhajji, Gavin Longmuir ; tõlk. Marek Laane

    Index Scriptorium Estoniae

    Alhajji, A. F.

    2007-01-01

    Autorid leiavad, et maailmas üha häälekamalt kõlav soov taotleda energiasõltumatust on absurdne, sest selle poole püüdlevate maade energeetiline julgeolek tegelikult väheneb. Kommenteerib energeetikaekspert Raivo Vare

  2. Technological advances in zero energy buildings; Avances tecnologicos en edificios de energia cero

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Milla, Guillermo; Perez Rebolledo, Hugo; Acoltzi Acoltzi, Higinio [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2011-07-01

    Buildings use a large amount of energy to operate and are one of the main sources of contaminating emissions. A building is a complex system and all of their components contribute to the total energy demand. The technology to construct zero-energy buildings is already available, but obstacles exist such as the lack of information and technical training of architects and engineers to design highly energy efficient buildings. The present article describes the progress to-date and the future prospects for the design and construction of zero-energy buildings, as well as the problems involved in its implementation. [Spanish] Los edificios usan una gran cantidad de energia para operar y son una de las principales fuentes de emisiones contaminantes. Un edificio es un sistema complejo y todos sus componentes contribuyen a la demanda total de energia. La tecnologia para construir edificios de energia cero ya esta disponible, pero existen barreras como falta de informacion o capacitacion tecnica a arquitectos e ingenieros, para disenar edificios de alta eficiencia energetica. El presente articulo muestra los avances a la fecha y la prospectiva para el diseno y construccion de edificios de energia cero, asi como la problematica para su implementacion.

  3. Design of the zero power reactor core of Instituto de Energia Atomica, SP, Brazil

    International Nuclear Information System (INIS)

    Ferreira, Antonio Carlos de Almeida

    1974-01-01

    The main characteristics of a graphite moderated core of a critical assembly to be installed in the zero power reactor of the Instituto de Energia Atomica have been defined. Several simple geometric configurations have been selected and criticality studies have been made. The necessary quantity of fissile uranium has been calculated. (author)

  4. Eesti Energia ehtis end võõraste kuresulgedega / Nils Niitra

    Index Scriptorium Estoniae

    Niitra, Nils, 1975-

    2007-01-01

    Lõuna-Eesti traadita internetituru liider Kernel on üllatunud, et Eesti Energia tütarfirma Televõrk traadita internetivõrk Kõu kasutas reklaamiks nende kurepilti. Lisa: Eilseks kadunud kurejutt. Ilmunud ka: Postimees, 20. juuni 2007, lk. 4

  5. Energia do hidrogênio: mudanças paradigmáticas rumo à uma "economia verde" no Brasil.

    OpenAIRE

    Filipe Lube

    2012-01-01

    Esta dissertação analisa o desenvolvimento da energia do hidrogênio no Brasil, numa perspectiva de mudança paradigmática. A perspectiva da sustentabilidade do desenvolvimento e de economia verde basilar no presente trabalho requer mudança de paradigma no setor energético. A energia é fundamental para melhoraria da qualidade de vida e do bem estar da população, porém é necessário buscar novas fontes de energias, limpas e renováveis, alternativamente às fontes de origem fóssil, e que possam sus...

  6. Um estudo da viabilidade de pequenos aerogeradores na produção de energia elétrica

    OpenAIRE

    Martins de Melo, Gilberto

    2009-01-01

    Este trabalho propõe o desenvolvimento de um aplicativo e discute ambos os resultados econômicos e técnicos obtidos com um procedimento chamado PEL - perfil de energia local. Esta ferramenta é a elaboração de metodologia alternativa para a estimativa de energia elétrica obtida a partir de energia eólica disponível usando turbinas de pequeno eixo horizontal. Os dados necessários para este procedimento são registrados como série simultânea anual da temperatura de ar e velocidade ...

  7. Inversor para sistemas domésticos de produção de energia eólica

    OpenAIRE

    Rocha, Cirilo Leonel da

    2008-01-01

    O presente trabalho descreve a simulação de um gerador e inversor para sistemas domésticos de produção de energia eólica. Este projecto pretende simular a produção de energia eléctrica por meio de uma energia renovável (vento). Descreve-se toda a arquitectura do sistema e respectiva implementação. São apresentados os resultados das partes mais importantes do sistema e respectiva análise. Os diversos componentes do sistema são inicialmente apresentados individualmente, ...

  8. CONSUMO DE ENERGIA ELÉTRICA: UMA ANÁLISE DE FONTE ALTERNATIVA DE COLETOR SOLAR DE BAIXO CUSTO

    OpenAIRE

    Ramon Alves de Oliveira; Murillo Ribeiro de Moura

    2015-01-01

    Com o aumento do consumo de energia elétrica e tarifas, a procura por geração de energias alternativas vem crescendo gradativamente, principalmente que sejam de baixo custo, assim possibilitando uma maior inclusão social beneficiando também as residências de baixa renda. Com o espírito de inovação a pesquisa buscou ideias simples que possam contribuir para a sociedade buscando alternativas sustentáveis e de baixo custo para a economia de energia elétrica Esse artigo teve como obje...

  9. Microscale adaptation of the potentiometric method with ion-selective electrode for the quantification of fluoride; Adaptacion a microescala del metodo potenciometrico con electrodo ion selectivo para la cuantificacion de fluoruro

    Energy Technology Data Exchange (ETDEWEB)

    Guevara Ruiz, Paulina; Ortiz Perez, Maria Deogracias [Laboratorio de Bioquimica, Facultad de de Medicina, Universidad Autonoma de San Luis Potosi, San Luis Potosi, San Luis Potosi, (Mexico)]. E-mail: mdortiz@uaslp.mx

    2009-05-15

    Similarly to other countries, ground water from Mexico is naturally polluted by fluoride. The main effects of fluoride at typical ground water concentrations are dental fluorosis, neurological deficits and reproductive disorders. In order to verify that the fluoride concentration is within the allowed guideline in Mexico (NOM 127 and 201), it is important to monitor fluoride levels in water and commercial beverages. The aim of this work is to develop a modification of the standard potentiometric method for fluoride determination in water, in order to reduce costs and amount of potentially toxic waste substances. Both methods were validated, the standard potentiometric method with the ion selective electrode and the microscale modification proposed in this paper. The methods were compared using statistic tests and graphics, followed by the comparison of 125 samples of commercial bottled water sold in the city of San Luis Potosi. Optimal results were obtained for the validation of both methods, and the microscale modification showed statistically identical results to those obtained with the standard method in all samples of bottled water. The microscale modification is a good alternative for fluoride assessment in water and beverages, and it represents a 95 % reduction of costs and chemical waste. [Spanish] En varios paises, incluido Mexico se presenta una contaminacion natural con fluoruro en agua subterranea; los principales efectos en la salud observados en poblacion expuesta a concentraciones mayores al valor permisible (que en Mexico es de 1.5 mg/L) son la fluorosis dental y esqueletica, asi como dano reproductivo y neurologico. En varios estados de la republica Mexicana, este problema es aun desconocido, de ahi la necesidad de evaluar las concentraciones de fluoruro en agua de consumo en varias comunidades. Asi, el objetivo de este trabajo es desarrollar un metodo a microescala para la determinacion de fluoruro en agua, que al reducir la cantidad de reactivo y

  10. Torque calculation in the induction motor with the finite element method; Calculo del par en el motor de induccion con el metodo del elemento finito

    Energy Technology Data Exchange (ETDEWEB)

    Castillo Diaz, Ramon

    2002-06-15

    In this work the method of the finite element is applied to the bi-dimensional analysis of the induction motor in operation in steady state, excited by sine sources of laminar currents and sine sources of voltage. The analysis is focused mainly in the calculation of the electromagnetic torque. The topics of electromagnetic theory are covered and in an idealized model of the induction motor, analytically and numerically with the method of the finite element, in the variant method of Galerkin, the vectorial potential and the torque are calculated. The results obtained with the analytical and numerical methods are compared. Three formulations are developed to calculate the torque with the method of the finite element, using triangular elements of first order, based in the equation of force of Lorentz, the Maxwell tensor and the principle of the virtual work. Finally, a motor of induction of real characteristics is simulated, assuming it is connected to a three-phase voltage source. In this motor it is analyzed the convergence and the evolution in the results obtained of the torque with different discretions, and the torque-velocity performance curve is calculated. [Spanish] En este trabajo se aplica el metodo del elemento finito al analisis bidimensional del motor de induccion en operacion en estado estable, excitado por fuentes de corriente laminar senoidales y fuentes de voltaje senoidales. El analisis se enfoca principalmente en el calculo del par electromagnetico. Se tratan los topicos de teoria electromagnetica involucrados y en un modelo idealizado del motor de induccion, se calculan analitica y numericamente con el metodo del elemento finito, en la variante metodo de Galerkin, el potencial vectorial y el par. Se comparan resultados obtenidos con los metodos analiticos y numericos. Se desarrollan tres formulaciones para calcular el par con el metodo del elemento finito, utilizando elementos triangulares de primer orden, basadas en la ecuacion de fuerza de

  11. Estudi de l’energia geotèrmica a Catalunya i la seva implementació a l’edificació. Comparativa amb l’energia solar tèrmica

    OpenAIRE

    Roca Subirana, Laura

    2010-01-01

    Aquest projecte pretén analitzar l’estat actual de l’energia geotèrmica a Catalunya i estudiarne la seva implementació en l’edificació. A més, pretén realitzar un estudi comparatiu entre aquesta energia renovable i l’energia solar tèrmica. Primerament, es realitza un balanç sobre el consum i la producció actuals d’energia a Catalunya. Aquest balanç es complementa amb una incisió sobre l’estat actual de les energies renovables a Catalunya, com també el futur que se’ls hi depara....

  12. H{sub 2} as source of renewable energy: production through catalytic methods by means of the reforming of methanol; H{sub 2} como fuente de energia renovable: produccion por metodos cataliticos mediante el reformado de metanol

    Energy Technology Data Exchange (ETDEWEB)

    Perez H, R; Lopez, P; Gutierrez M, A; Gutierrez W, C; Mondragon G, G; Mendoza A, D [ININ, Departamento de Tecnologia de Materiales, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico); Angeles Ch, C [Instituto Mexicano del Petroleo, Programa de Ingenieria Molecular, Eje Central Lazaro Cardenas Norte 152, Col. San Bartolo Atepehuacan, 07730 Mexico D. F. (Mexico); Arenas A, J., E-mail: raul.perez@inin.gob.m [UNAM, Instituto de Fisica, Ciudad Universitaria, 04510 Mexico D. F. (Mexico)

    2010-07-01

    The fuel cells transform the chemical energy stored in the connection H-H of the H{sub 2} molecule in electric energy and water vapor when is combines with the oxygen. Even when the hydrogen has a high potential as energy source, its handling is difficult (storage and transport). This has motivated the search of hydrogen production methods in situ starting from liquid fuels like the methanol or ethanol through the reaction of reforming. The methanol is a fuel of easy availability for fuel cells with electronic applications and of transport. Although the methanol energy density is approximately half of the gasoline and diesel, it is more reagent and can be used directly in fuel cells or can also be reformed to low temperatures for the hydrogen obtaining to be used in fuel cells of proton exchange. In this article the results obtained of the systems, Cu-Ni/ZrO{sub 2} and Ag-Au(1-D)-CeO{sub 2} are presented and can be competitive to generate H{sub 2} and being used in the fuel cells to generate energy. (Author)

  13. Observability in electric power networks: a method of ways of factorization in state estimation with equality restrictions; Observabilidade em redes de energia: um metodo de caminhos de fatoracao em estimacao de estado com restricoes de igualdade

    Energy Technology Data Exchange (ETDEWEB)

    Vicentino, Flavio Antonio

    1997-07-01

    A theory of network observability that mixes graph concepts and factorization of the gain matrix G has been recently developed. It uses data already available in Power System Operating Centers. That theory is easy to understand and implement and does not require subroutines other than the ones used in static state estimation. However, this new theory has been implemented only for the case of state estimation in Normal Equation Formulation (N E). However, the N E Method presents some inherent numerical difficulties. Such numerical difficulties are usually related to the disparity in the measurements weights (high values for zero-injections measurements and low values for pseudo-measurements) and the presence of short lines in the network, as well. In order to solve such numerical difficulties, new methods have come up, such as: Normal Equation Method with Equality Constraints (N E/C), where Lagrange's Multiplier Method can be applied to minimize a function while satisfying a set of constraints; Hachtel's Method, which is formulated the same way as N E/C Method, although an equation of residual vector is introduced in solution process; Hybrid Method, which is a general formulation behaving as the N E/C Method at one extreme, and as Hachtel's Method at the other. Thus, the aim of this work is to treat the adaptation of the network observability Method by using path graphs, with the state estimation in the form of a minimization problem with equality constraints. As the Hybrid Method is a generalization form of the state estimator with constraints, this formulation is used to develop the proposed theory. Extreme case (as the pure Hachtel's Method) are also considered. (author)

  14. Comparison between different methods for inspection of wooden poles in service in electricity distribution networks; Comparacao entre diferentes metodos de inspecao de postes de madeira em servico em redes de distribuicao de energia

    Energy Technology Data Exchange (ETDEWEB)

    Cruz, M.A.O.; Pires, M.; Dedavid, B.A.; Vidor, F.L.R.; Oliveira, W.S.; Abruzzi, R.C. [Pontificia Univ. Catolica do Rio Grande do Sul (PUC-RS), Porto Alegre, RS (Brazil). Programa de Pos-Graduacao em Engenharia e Tecnologia de Materiais (PGETEMA)], Email: mpires@pucrs.br

    2010-07-01

    The pole is the main support structure of the electric network and should be inspected regularly to ensure system security. The aim of this study is to compare traditional and instrumental inspection methods of the wooden poles in service in AES Sul power distribution network (Montenegro, RS). The inspections were conducted in about 180 poles in two measurement campaigns (2001 and 2010). The procedure was based on the traditional inspection (visual inspection, percussion and effort lateral) and instrumental method based on Polux equipment that measures the penetration resistance and moisture content of wood. The results were compared in search of assertiveness of the methods used to subsidize the standardization of inspection procedures. (author)

  15. Windmills: selection method and results obtained by the Renewable Energy Center of UNESP - Guaratingueta Campus, Sao Paulo state, Brazil; Cata-vento: metodo de selecao e resultados obtidos pelo Centro de Energias Renovaveis da UNESP - Campus Guaratingueta

    Energy Technology Data Exchange (ETDEWEB)

    Moura, Luis Fernando Silva; Souza, Teofilo Miguel de [Universidade Estadual Paulista (UNESP), Guaratingueta, SP (Brazil). Centro de Energias Renovaveis], e-mail: teofilo@feg.unesp.br, e-mail: lfernandosm@uol.com.br

    2004-07-01

    Windmills are always a good option to promote irrigate in areas with adequate potential wind. Its correct selection can guarantee the enough water supply with minimum cost. Since April 2004 the Renewable Energy Center of UNESP - Campus Guaratingueta' has tested a commercial windmill with 18 blades rotor and 3,4 diameter meters, that in a area with approximately 3 m/s average wind speed, has been obtained a average daily 1500 water liters. This volume is enough to supply a small country state, however, it could be get with a smaller capacity machine, if this worked properly. (author)

  16. A hydrothermal economic dispatch model for the energy markets using the interior point method; Um modelo de despacho economico hidrotermico para os mercados de energia utilizando o metodo de pontos interiores

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Leandro L.H.; Silva, Alessandro L. da; Vergilio, Andre H.B.; Nepomuceno, Leonardo [Universidade Estadual Paulista (UNESP), Bauru, SP (Brazil). Dept. de Engenharia Eletrica], Emails: leandroluiz@ymail.com, alessandrolopessilva@uol.com.br, andrevergilio@yahoo.com.br, leo@feb.unesp.br; Cicogna, Marcelo Augusto [Anhanguera Educacional S.A. (Brazil)], E-mail: marcelo.cicogna@unianhanguera.edu.br,

    2009-07-01

    This paper aims to propose a model of economic dispatch for the problem representation of the auction in pool markets for systems with generation predominantly hydraulic. In the dispatch models described in the literature, only the agents of thermal generation participate in the auction pool. This is due to the fact that it have not been proposed in the literature yet a suitable model for representation of the cost structure of hydraulic generators. In this work is proposed the function of opportunity cost of hydrogeneration, which establishes a framework of 'cost' of hydraulic generation, based on losses in the process of hydroelectric generation. It is also studied the feasibility that both agents on the hydraulic and thermal generators can bidding in the pool. The approach to solving the problem involves the method of primal-dual logarithmic barrier. The results show that using the function of opportunity cost for hydroelectric plants is important for the system energy optimization as a whole, but its use for the representation of the bids of the hydraulic agents still needs further deepening search.

  17. L'uso pacifico dell'energia nucleare da Ginevra 1955 ad oggi : il caso italiano : atti del convegno

    CERN Document Server

    2007-01-01

    Energia e sviluppo (le fonti energetiche) ; l'Italia e l'opzione nucleare ; stato a prospettive delle tecnologie nucleari ; reattori nucleari di nuova generazione ; tecniche nucleari in biologia, medicina biochimica, agraria e beni culturali ; sicurezza e ambiente.

  18. Börs nutab taga Eesti Energia loobumist / Jaana Pikalev ; kommenteerinud Jürgen Ligi, Sandor Liive

    Index Scriptorium Estoniae

    Pikalev, Jaana

    2010-01-01

    SEB privaatpanganduse osakonna strateeg Peeter Koppel, LHV Panga analüütik Sten Pisang, investor Stefan Andresson avaldavad arvamust seoses otsusega Eesti Energia veel mitte börsile viia. Majandus- ja kommunikatsiooniminister Juhan Partsi arvamus

  19. Management report 2003 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2003 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-03-15

    This document reports the general activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2003, involving the government programs in the areas of nuclear safety, medicine application, technological development, administration and miscellaneous.

  20. Eesti Energia: valitsus võtab aja maha ja laseb börsimõttel veel settida / Raimo Poom

    Index Scriptorium Estoniae

    Poom, Raimo

    2010-01-01

    Täna valitsuskabinetis toimuv arutelu ei paista keskenduvat mitte sellele, kas Eesti Energia börsile viimise plaan on hea või halb, vaid pigem sellele, kui kiire Eesti Energial oma plaanide rahastamisega on ning kas kõik ettevõtte soovid lähevad riigi eesmärkidega kokku. Eesti Energia investeeringute kava tekitab praegu rohkem küsimusi kui rahastamine

  1. Nuclear Power and Sustainable Development (Spanish Edition); Energia Nucleoelectrica y Desarrollo Sostenible

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-02-15

    Any discussion of 21st century energy trends must take into account the global energy imbalance. Roughly 1.6 billion people still lack access to modern energy services, and few aspects of development - whether related to living standards, health care or industrial productivity - can take place without the requisite supply of energy. As we look to the century before us, the growth in energy demand will be substantial, and 'connecting the unconnected' will be a key to progress. Another challenge will be sustainability. How can we meet these growing energy needs without creating negative side effects that could compromise the living environment of future generations? Nuclear power is not a 'fix-all' option. It is a choice that has a place among the mix of solutions, and expectations for the expanding use of nuclear power are rising. In addition to the growth in demand, these expectations are driven by energy security concerns, nuclear power's low greenhouse gas emissions, and the sustained strong performance of nuclear plants. Each country must make its own energy choices; one size does not fit all. But for those countries interested in making nuclear power part of their sustainable development strategies, it is important that the nuclear power option be kept open and accessible [Spanish] En cualquier analisis de las tendencias energeticas del siglo XXI hay que tomar en cuenta el desequilibrio energetico mundial. Aproximadamente 1 600 millones de persona aun no tienen acceso a servicios energeticos modernos, y pocos aspectos del desarrollo - ya se trate de los niveles de vida, la atencion sanitaria o la productividad industrial - pueden conseguirse sin el necesario suministro de energia. Si consideramos el siglo que tenemos por delante, vemos que el crecimiento de la demanda energetica sera sustancial y que una clave del progreso consistira en 'conectar a los que carecen de conexion'. Otro desafio sera la sostenibilidad. Como podemos satisfacer estas necesidades

  2. Análise de um sistema de aquecimento de água para residências rurais, utilizando energia solar

    OpenAIRE

    Basso,Luiz H.; Souza,Samuel N. M. de; Siqueira,Jair A. C.; Nogueira,Carlos E. C.; Santos,Reginaldo F.

    2010-01-01

    A conscientização da importância do meio ambiente tem incentivado o estudo de novas fontes energéticas renováveis e menos poluentes. Dentre essas fontes, a energia solar destaca-se por ser perene e limpa. A utilização da energia solar em sistemas de aquecimento de água residencial rural pode colaborar com a economia de energia elétrica, base da matriz energética brasileira. Conhecer os fatores que influenciam na operação de um sistema de aquecimento de água por energia solar é importante na d...

  3. Análise De Oportunidades E Desafios Para O Nexo Água-energia

    OpenAIRE

    Mariani; L; Guarenghi; MM; Mito; JYL; Cavaliero; CKN; Galvao; RRD

    2016-01-01

    O desenvolvimento econômico, o crescimento da população mundial e o aumento da urbanização, tendem a aumentar a demanda mundial por água e energia, intensificando os conflitos entre os setores hídrico e energético e gerando impactos sobre o meio ambiente. Além da interferência direta dos seres humanos sobre esses recursos, as mudanças climáticas e eventos climáticos extremos têm afetado a disponibilidade de água e, consequentemente, a geração de energia de forma significativa. Este trabalho t...

  4. Contratos bilaterais em mercados de energia elétrica multiagente: protocolo de rede de contratos

    OpenAIRE

    Fragoso, Frederico Parente

    2015-01-01

    O setor elétrico tem assistido a mudanças profundas na sua estrutura e organização, devido à sua liberalização, o que levou a uma maior competitividade nos mercados de energia elétrica. Uma gestão eficiente dos mercados de energia torna-se cada vez mais uma prioridade devido aos riscos que estes podem apresentar, aliado à elevada volatilidade dos preços e volumes nos diferentes períodos horários (incertezas na produção e consumo). A liberalização do setor elétrico levou à criação de sim...

  5. Fome de energia? Do desperdício à poupança

    OpenAIRE

    Malico, Isabel

    2013-01-01

    A intensificação das atividades económicas a nível mundial e o aumento da população amplificam alguns dos problemas ambientais que a humanidade enfrenta hoje em dia. Alguns deles prendem-se com a conversão e utilização de energia. No seu relatório anual de 2012, a Agência Internacional de Energia refere que em 2035 as necessidades energéticas mundiais serão mais de 1/3 superiores às atuais [1]. Nos países da OCDE as necessidades energéticas aumentarão pouco, mas assistir-se-á até 2035 a uma c...

  6. Europa, energia e geoeconomia: infraestruturas prioritárias e novas soluções

    OpenAIRE

    Ribeiro, José Félix

    2012-01-01

    Em 2010 a Comissão Europeia avançou com a proposta de um conjunto de corredores e interconexões europeias na área da energia, que culmina um processo de definição gradual de uma estratégia geoeconómica para garantir maior segurança energética e sustentabilidade

  7. Eesti Energia IPO nõuab sadu miljoneid kroone / Sulev Vedler

    Index Scriptorium Estoniae

    Vedler, Sulev, 1970-

    2009-01-01

    Valitsus ei otsustanud, kas müüa Eesti Energia uued aktsiad maha börsi kaudu või osta need ise ära. Peaministri majandusnõuniku Aare Järvani sõnul on tegemist olulise poliitilise otsusega ja see ei tohi tekitada rahvas pahameelt. Autori sõnul võidaks börsiplaan poolehoidu näiteks siis, kui firma töötajad ja jaekliendid saaksid osta aktsiaid soodustingimustel

  8. Produção de biomassa florestal para energia em sistemas agroflorestais

    Directory of Open Access Journals (Sweden)

    Gabriel Browne de Deus Ribeiro

    2017-12-01

    Full Text Available O objetivo dessa revisão foi avaliar o potencial da produção de biomassa florestal com fins energéticos em Sistemas Agroflorestais (SAFs. O uso da madeira e de resíduos florestais para energia tem sido bastante estimulado no Brasil e no mundo nas últimas décadas, em razão de questões ambientais e da sua viabilidade técnica e econômica. No entanto, seu desenvolvimento em SAFs ainda necessita de mais estudos. Foram analisadas as principais características técnicas e econômicas para a produção de madeira para energia em SAFs, destacando espécies arbóreas, qualidade de sítio, características socioeconômicas e práticas agrossilviculturais. Os principais estudos encontrados são oriundos da Europa, Estados Unidos, Ásia e África, enquanto que no Brasil ainda existe escassez de trabalhos nesse tema, embora o país seja grande consumidor de biomassa florestal para energia. Todos os trabalhos encontrados indicaram que existe potencial técnico e econômico para a geração de energia de biomassa em SAFs, tanto para o abastecimento do produtor rural, quanto para a comercialização da madeira com qualidade para uso energético. Contudo, essa relação depende fundamentalmente de: maior estruturação do mercado para biomassa florestal, características socioeconômicas regionais e condições ambientais.

  9. Flow measurement in a 170-MW hydraulic turbine using the Gibson method; Medicion del flujo de una turbina hidraulica de 170 MW utilizando el metodo Gibson

    Energy Technology Data Exchange (ETDEWEB)

    Urquiza, Gustavo [Universidad Autonoma del Estado de Morelos (Mexico); Adamkowski, Adam [The Szewalski Institute of Fluid-Flow Machinery (Poland); Kubiak, Janusz; Sierra, Fernando [Universidad Autonoma del Estado de Morelos (Mexico); Janicki, Waldemar [The Szewalski Institute of Fluid-Flow Machinery (Poland); Fernandez, J. Manuel [Comision Federal de Electricidad (Mexico)

    2007-07-15

    This paper describes the methodology applied for measuring water flow through a 170-MW hydraulic turbine. The flow rate was measured using the pressure-time method, also known as the Gibson method. This method uses the well-known water hammer phenomenon in pipelines; in turbine penstocks, for instance. The version of this method used here is based on measuring, during total stop of the water stream, the time-history of pressure change in one section of the turbine penstock and relate it to the pressure in the upper reservoir to which the penstock is connected. The volumetric flow rate is determined from the relevant integration of the measured temporary pressure rise. Flow measurement was possible this way because the influence of the penstock inlet was negligible as far as an error of the measurement is concerned. The length of the penstock was 300 m. Previous experience and a standard IEC-41-1991 were the criteria adopted and applied. A fast and efficient acquisition system, including a 16 bit card, was used. The flow rate was calculated using a computer program developed and tested on several cases. The results obtained with the Gibson method were used for calibration of the on-line flow measuring system based on the Winter-Kennedy method as one of the index methods. This method is very often used for continuous monitoring of the flow rate through hydraulic turbines, when the calibration has been done on site by using the results of measurements obtained by the absolute method. Having measured the flow rate and output power, the efficiency was calculated for any operating conditions. A curve showing the best operating conditions based on the highest efficiency is presented and discussed. The details of the instrumentation, its installation, and the results obtained are discussed in the paper. [Spanish] Este articulo describe la metodologia aplicada para la medicion del flujo en una turbina hidraulica de 170 MW. El flujo se midio utilizando el metodo de presion

  10. Techniques of thermal energy conservation; Tecnicas de conservacion de la energia termica

    Energy Technology Data Exchange (ETDEWEB)

    Caltenco Estevez, Juan Luis; Roblez Lopez, Francisco; Ceballos Serna, Andres Alberto [Instituto Mexicano del Petroleo (Mexico)

    1996-07-01

    In modern industry the thermal energy is the energy more intensely used, which implies that in the processes and equipment that operate based on it, rely the greatest opportunities for saving . In this paper some saving and conservation techniques of thermal energy, which nowadays have been developed, are presented, whose application has helped to the successful attainment of the objectives of increased productivity of industrial plants, with the additional benefit of reducing the environmental impact of the production activities. [Spanish] En la industria moderna la energia termica es la forma de energia mas intensamente utilizada, lo cual implica que en los procesos y equipos que operan basandose en esta, residan las mayores oportunidades de ahorro. En este trabajo se presentan algunas de las tecnicas de ahorro y conservacion de energia termica, que hoy en dia se han desarrollado, cuya aplicacion ha coadyuvado a la consecucion exitosa de los objetivos de incremento de la productividad de plantas industriales, con el beneficio adicional de reducir el impacto ambiental de las actividades productivas.

  11. Efeito de impactos repetidos de baixa energia em compósitos pultrudados

    Directory of Open Access Journals (Sweden)

    Morais Willy Ank de

    2001-01-01

    Full Text Available Danos internos podem ser gerados em compósitos de matriz polimérica submetidos a impactos de baixa energia. O efeito repetido de eventos desse tipo pode levar, eventualmente, à falha da estrutura. Neste trabalho dois tipos de perfis pultrudados foram submetidos a impactos por queda livre de peso de 0,5 m e 1,0 m de altura. Os resultados obtidos foram analisados em função da disposição das fibras nos perfis e mostram que a existência de uma camada rica em resina em um dos perfis, contribui para reduzir significativamente o desempenho deste perfil. Este comportamento foi associado à formação prematura de trincas na camada rica em resina. O número de eventos de impacto, o tempo de duração de cada choque e a forma da área danificada foram correlacionados com a presença, ou não, da região rica em resina. Os resultados obtidos indicam ainda que a diferença na microestrutura dos perfis analisados é mais significativa para os ensaios de menor energia (queda de 0,5 m. Para os ensaios de maior energia (queda de 1 m a configuração do material teve apenas uma importância secundária.

  12. Asymptotic energies and sustainable electrical development; Energias asintoticas y desarrollo electrico sustentable

    Energy Technology Data Exchange (ETDEWEB)

    Velez O, Carlos [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2003-07-01

    A review is made of the energy resources in use existing at the moment for the electricity production (hydraulic, coal, oil, gas and uranium). The asymptotic energies (solar, geothermal and nuclear fission and fusion) are described and the state of development in which they are up to the moment. One concludes that in the case of Mexico it would be convenient to make flexible and to reinforce the electrical systems in forecast of a greater participation of the distributed generation and to orient the extensions of the electrical generation to make a greater use of the three asymptotic energies already used: the solar (in its forms hydraulic and wind power), geothermal and the nuclear fission. [Spanish] Se pasa revista a los recursos existentes en las energias actualmente en uso para la produccion de electricidad (hidraulica, carbon, petroleo, gas y uranio). Se describen las energias asintoticas (solar, geotermia y fision y fusion nucleares) y el estado de desarrollo en que se encuentran hasta el momento. Se concluye que en el caso de Mexico convendria flexibilizar y reforzar el sistema electrico en prevision de una mayor participacion de la generacion distribuida y orientar las ampliaciones de la generacion electrica para hacer un mayor uso de tres de las energias asintoticas ya utilizadas: la solar (en sus formas hidraulica y eolica), la geotermia y la fision nuclear.

  13. Flow in potential cascades by means of the finite element method; Flujo en cascadas potenciales mediante el metodo del elemento finito

    Energy Technology Data Exchange (ETDEWEB)

    Sosa Cordero, Rodolfo; Fernandez Valencia, Gonzalo [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1987-12-31

    This article presents a mathematical model and its solution by means of the finite element method with approximate Garlekin formulation, for the flow analysis in a circular cascade, in a surface of revolution current of a turbo- machine, that can be axial, mixed or radial. To the revolution surface an agreed transformation is applied to obtain a plane, eliminating in this form one term in the equation succeeding in avoiding an iterative solution. Likewise, the finite element method allows to solve the equation in partial derivatives of the elliptical type in its quasi-harmonic form. Additionally, the method followed to introduce the contour conditions is presented; specially, the Kutta-Joukowsky conditions and the one of periodicity, which distinguishes this problem from the classical problems of ideal flows evaluated in the contour. [Espanol] En este articulo se presenta un modelo matematico y su solucion mediante el empleo del metodo del elemento finito con formulacion aproximada de Galerkin, para el analisis del flujo en una cascada circular, en una superficie de corriente de revolucion de una turbomaquina, que puede ser axial, mixta o radial. A la superficie de revolucion se le aplica una transformacion conforme para obtener un plano, eliminando de esta forma un termino en la ecuacion logrando evitar la solucion iterativa. Asimismo, el metodo del elemento finito permite resolver la ecuacion en derivadas parciales del tipo eliptico en su forma cuasiarmonica. Se presenta, ademas, el metodo seguido para introducir las condiciones de contorno; en especial, las condiciones de Kutta-Joukowsky y la de periodicidad, que distinguen a este problema de los problemas clasicos de flujos ideales valuados en el contorno.

  14. Flow in potential cascades by means of the finite element method; Flujo en cascadas potenciales mediante el metodo del elemento finito

    Energy Technology Data Exchange (ETDEWEB)

    Sosa Cordero, Rodolfo; Fernandez Valencia, Gonzalo [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1986-12-31

    This article presents a mathematical model and its solution by means of the finite element method with approximate Garlekin formulation, for the flow analysis in a circular cascade, in a surface of revolution current of a turbo- machine, that can be axial, mixed or radial. To the revolution surface an agreed transformation is applied to obtain a plane, eliminating in this form one term in the equation succeeding in avoiding an iterative solution. Likewise, the finite element method allows to solve the equation in partial derivatives of the elliptical type in its quasi-harmonic form. Additionally, the method followed to introduce the contour conditions is presented; specially, the Kutta-Joukowsky conditions and the one of periodicity, which distinguishes this problem from the classical problems of ideal flows evaluated in the contour. [Espanol] En este articulo se presenta un modelo matematico y su solucion mediante el empleo del metodo del elemento finito con formulacion aproximada de Galerkin, para el analisis del flujo en una cascada circular, en una superficie de corriente de revolucion de una turbomaquina, que puede ser axial, mixta o radial. A la superficie de revolucion se le aplica una transformacion conforme para obtener un plano, eliminando de esta forma un termino en la ecuacion logrando evitar la solucion iterativa. Asimismo, el metodo del elemento finito permite resolver la ecuacion en derivadas parciales del tipo eliptico en su forma cuasiarmonica. Se presenta, ademas, el metodo seguido para introducir las condiciones de contorno; en especial, las condiciones de Kutta-Joukowsky y la de periodicidad, que distinguen a este problema de los problemas clasicos de flujos ideales valuados en el contorno.

  15. ENERGIA SOLAR: ALTERNATIVA ENERGÉTICA E ECONÔMICA PARA O INSTITUTO FEDERAL DO MARANHÃO - CAMPUS BACABAL

    Directory of Open Access Journals (Sweden)

    Pedro Alves Fontes

    2016-11-01

    Full Text Available No mundo atual os tipos de produção de energias são, em sua maioria, muito poluentes e degradam o meio ambiente. A busca por energias não poluentes tornou-se a principal linha de pesquisa junto às energias alternativas, porque são abundantes na natureza e não degradam o meio ambiente, como por exemplo, a Fotovoltaica (FV. O nordeste brasileiro é uma região promissora nesse tipo de geração de energia, devido a grande incidência de irradiação solar. Bacabal, cidade central do Maranhão, encontra-se em uma boa localização em relação à Linha do Equador o que a torna favorável para o estudo de energia solar. Mostra-se neste trabalho a análise da possível implantação de um sistema FV no Instituto Federal do Maranhão (IFMA. Comprovando-se, com gráficos e tabelas simulados em plataformas nacionais, a viabilidade e a eficiência desta forma de obtenção de energia, bem como a contribuição para a preservação do meio ambiente com a não emissão de dióxido de carbono (CO2, quando se deixa de usar as energias advindas de hidrelétricas.

  16. Method of identifying the friction of rotors using the wavelet transform; Metodo para identificar el rozamiento de rotores utilizado la transformada wavelet

    Energy Technology Data Exchange (ETDEWEB)

    Jauregui Correa, Juan Carlos; Rubio Cerda, Eduardo; Gonzalez Brambila, Oscar [CIATEQ, A.C., Queretaro (Mexico)

    2007-11-15

    The modern processes of signal analysis that measure mechanical vibrations are based on the fast transform of Fourier (FFT), nevertheless, this method is not able to identify transient phenomena nor of nonlinear nature. Although many efforts have been made to try to identify these phenomena in the frequency spectra, it is not possible to correlate the spectra with the physical characteristics of this type of phenomena. Within these phenomena on the rubbing of a rotor against the housing or trunnion of a bearing, this phenomenon has a nonlinear behavior, as it is demonstrated in this paper. In the first part a method based on the of signal analysis type wavelets is presented and how this technique can be used to predict transient and nonlinear phenomena. Once defined the method, its application in the identification of the friction of rotors is demonstrated. With this, one demonstrates that the method presented in this paper allows to also identifying in real time the rubbing phenomenon and also that it can be used as an of analysis technique in the preventive maintenance systems. [Spanish] Los procesos modernos de analisis de senales que miden vibraciones mecanicas se basan en la transformada rapida de Fourier (FFT por sus siglas en ingles), sin embargo, este metodo no es capaz de identificar fenomenos transitorios ni de naturaleza no lineal. A pesar de que se han hecho muchos esfuerzos para tratar de identificar estos fenomenos en los espectros de frecuencia, no es posible correlacionar el espectro con las caracteristicas fisicas de este tipo de fenomenos. Dentro de estos fenomenos sobre el rozamiento de un rotor contra la carcasa o munon de una chumacera, este fenomeno tiene un comportamiento no lineal, como se demuestra en este trabajo. En la primera parte se presenta un metodo basado en el analisis de senales tipo wavelets y como esta tecnica puede utilizarse para predecir fenomenos transitorios y no lineales. Una vez definido el metodo, se demuestra su

  17. Risk control in energy saving projects; Control de riesgo en los proyectos de ahorro de energia

    Energy Technology Data Exchange (ETDEWEB)

    Mills, Evan [Lawrence Berkeley National Laboratory, CA (United States)

    2005-10-15

    Since one of the restrictive problems when investing in energy saving is the uncertainty of obtaining the planed savings, a technique in the risk handling for energy efficiency projects, called Insurance for the Energy Saving (IES) is presented. IES economically stimulates those who implement projects for energy saving so they go beyond the normal measures and really obtain significant saving levels, thus contributing to the fulfillment of national objectives in energy saving. In order to reduce the risk of low performance in energy caused by saving projects there exist the international performance measurement and the protocol of investment (IMPVP) as well as diagnoses and starting processes, whereas in order to transfer the financial risk that a saving project represents, mechanisms such as FDIC insurance, conversion of the debt in values, Saving's Guarantees, Performance Bonuses or Guarantee Bonuses and Insurances for Energy Saving can be of great help. This article deals on the IES insurance policies, their loss control management, successful cases, benefits, particular advantages, place in the market and refers argued insurance exceptions and perception surveys. [Spanish] Dado que uno de los problemas restrictivos a la hora de invertir en el ahorro de energia es la incertidumbre de obtener los ahorros proyectados, se presenta una tecnica en el manejo del riesgo para proyectos de eficiencia energetica llamada Seguro para el Ahorro de Energia (SAE). SAE estimula financieramente a quienes implementan proyectos para el ahorro de energia con el fin de que vayan mas alla de las medidas normales y consigan niveles significativos de ahorro, contribuyendo asi al cumplimiento de objetivos nacionales de ahorro energetico. Para reducir el riesgo de bajo desempeno de energia provocados por proyectos de ahorro existe la medicion del desempeno internacional y el protocolo de inversion (IMPVP) asi como diagnosticos y procesos de arranque, mientras que para transferir el

  18. Energy conservation analysis using Fuzzy logic considering technical and environmental aspects; Analise da conservacao de energia utilizando logica fuzzy considerando aspectos tecnicos e o meio ambiente

    Energy Technology Data Exchange (ETDEWEB)

    Haddad, Jamil; Yamachita, Roberto Akira; Guardia, Eduardo Crestana [Universidade Federal de Itajuba (UNIFEI), MG (Brazil). Centro de Excelencia em Eficiencia Energetica; Reis, Alexandre de Souza Rodrigues dos; Pinto, Luiz Fernando do Monte [Furnas Centrais Eletricas, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    This article presents the results obtained in the Project of Research and Development of Furnas Centrais Eletricas, which was accomplished with the partnership of the Fundacao de Pesquisa e Assessoramento a Industria - FUPAI. This project analyzed technically and economically the pollution caused in the electric net by the use, in growing scale, of nonlinear loads, such as: compact fluorescent lamps, microwave ovens, VHS systems, DVD, sound systems, etc. It was also analyzed the environmental impact caused by these lamps due to the presence of the mercury; and as complement to the traditional theory of economical analysis, a tool of economical analysis was developed using the theory of fuzzy sets for the uncertainty variables or of difficult quantification. (author)

  19. ENERGIA EÓLICA: uma fonte energética limpa e renovável em nosso meio

    Directory of Open Access Journals (Sweden)

    GABRIEL MOREIRA

    2011-07-01

    Full Text Available Segundo o IBGE, no ano de 2010, a população brasileira teve um crescimento de 1,12%. Tendo em vista que tal crescimento necessita de uma grande demanda energética, precisa-se de fontes alternativas. Um bom meio supressor é a energia eólica. Meio de energia renovável e limpa. Segundo o documentário, Energia Eólica: a caçada pelos ventos, exibido pela TV Zabelê: “É uma dádiva da natureza o fato da nossa região ter esse grande potencial eólico [...].” No entanto, sua instalação necessita-se de grandes investimentos. Tendo em vista este grande crescimento populacional o projeto de pesquisa Energia Eólica: Uma fonte energética limpa e renovável em nosso meio, tem como objetivo a produção de um pequeno campo de energia eólica, em uma biblioteca na escola Oswaldo Cruz, na cidade de Sinop, Mato Grosso. Desta forma temos a possibilidade de reduzir 70% do consumo energético convencional, proporcionando uma economia financeira considerável. A implantação deste projeto está prevista para o segundo semestre de 2014.

  20. Performance indicators proposal for the government electric power distribution facilities in the Brazilian electric sector; Proposta de indicadores de desempenho as distribuidoras de energia federalizadas do setor eletrico brasileiro

    Energy Technology Data Exchange (ETDEWEB)

    Carregaro, Jose Carlos

    2003-07-01

    In this dissertation a set of indicators is proposed to the Centrais Eletricas Brasileiras S/A - ELETROBRAS, allowing the holding companies to attain the top position in the market, and a global vision of their performance. The methodology applied the definition of the performance indicators and the context, existing studies, and the indicators used by the Brazilian electric sector. It is expected that the proposed set of indicators be used by ELETROBRAS for a better planning and a more objective control of the holding companies performance, as well as an analysis of their administration strong and weak aspects.

  1. New method for electric equivalents synthesis expressed in digital filters form for transitory simulations in real time for great power nets; Novo metodo para sintese de equivalentes eletricos a filtros digitais para simulacao de transitorios em tempo real em redes eletricas de grande porte

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Clever [Minas Gerais Univ., Belo Horizonte, MG (Brazil). Nucleo de Desenvolvimento Cientifico e Tecnologico em Descargas Atmosfericas]. E-mail: clever@cpdee.ufmg.br; Carneiro Junior, Sandoval [Universidade Federal, Rio de Janeiro, RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia; Szczupak, Jacques [Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil)

    2001-07-01

    This article presents a new method to obtain subtransmission nets equivalents, expressed in form of digital filters of finite answer to the impulse, for transitory simulations in great power nets. Initially, it has been made considerations in the way of obtaining these filters, showing that they basically have been synthesized from the impedance and admittance functions of the secondary electric net to be processed in terms of equivalents in the domain of the w analogical frequency. It also is shown the transference technique to the time domain, in which it is used the z plane of the digital frequencies as an intermediate plane, being obtained from this way a set of equations susceptible of being implemented in program of transitory simulation in the time domain. The evaluation of this new method and evaluation of the reduction effect in the order of representative filters of the equivalents, are executed through the comparison of simulations which use the new technique together with other ones coming from EMTP. The obtained replies have demonstrated the effectiveness of the proposed method, opening new possibilities for transitory simulations in great power nets.

  2. Energy balance of the metropolitan zone of the valley of Mexico, methodology and the entailment energy-air quality; Balance de energia de la zona metropolitana del valle de Mexico metodologia y la vinculacion energia - calidad del aire

    Energy Technology Data Exchange (ETDEWEB)

    Bazan Navarrete, Gerardo [Universidad Nacional Autonoma de Mexico, Mexico, D.F. (Mexico)

    2001-07-01

    The present document raises a methodology for the elaboration of the Energy Balance of the Metropolitan Zone of the Valley of Mexico (ZMVM), in order to unify criteria and to facilitate the work of entities and investigators, mainly of those that require the entailment of energy and environment. The applied methodology, the consolidated format and the caloric unity facilitates the insertion of the Energy Balance of the ZMVM within the National Balance of Energy. The regional balances of energy have the intention of knowing the energy consumption patterns in the ZMVM and the indexes of energy intensity by sector. They establish the relationship of the indexes of energy intensity with the local and global air quality of the region, performing studies of incidence with the main polluting agents and with the greenhouse effect gases. [Spanish] El presente documento plantea una metodologia para la elaboracion del Balance de Energia de la Zona Metropolitana del Valle de Mexico (ZMVM), con el proposito de unificar criterios y facilitar el trabajo de organismos e investigadores, sobre todo de aquellos que requieren vincular energia y medio ambiente. La metodologia aplicad, el formato consolidado y la unidad calorica facilitan la insercion del Balance de Energia de la ZMVM dentro del Balance Nacional de Energia. Los balances regionales de energia tienen el proposito de conocer los patrones de consumo de energia en la ZMVM y los indices de intensidad energetica por sector. Establecen la relacion de los indices de intensidad energetica con la calidad del aire local y global de la region, realizando estudios de incidencia con los principales contaminantes y con los gases de efecto invernadero.

  3. APLICAÇÃO DE UMA FONTE ALTERNATIVA DE ENERGIA TERMELÉTRICA A GÁS NATURAL VISANDO REDUZIR O CUSTO COM ENERGIA ELÉTRICA EM UM EDIFÍCIO COMERCIAL

    Directory of Open Access Journals (Sweden)

    Alvaro Antonio Ochoa

    2015-02-01

    Full Text Available Este trabalho tem como objetivo reduzir o consumo de energia elétrica de um Edifício Comercial, através da utilização de uma unidade termelétrica (grupo gerador que opera com gás natural. A unidade termelétrica servirá como uma fonte alternativa de energia na matriz energética do empreendimento. O custo de energia elétrica representa um impacto considerável nos custos operacionais do edifício. A análise quantitativa dos dados de consumo de energia do Edifício Comercial estudado, associado ao conhecimento do sistema tarifário hora-sazonal foi fundamental para determinar a viabilidade do projeto. Além disto, foi verificada a viabilidade econômica do projeto, tendo como base dois parâmetros financeiros de tempo de retorno (payback e critério do valor presente líquido (CVPL. Os resultados permitiram demonstrar, que realmente é tecnicamente e economicamente viável a aplicação do investimento neste projeto, obtendo uma redução de consumo de energia elétrica de aproximadamente 20% a. m., o equivalente a R$295.000,00 menos do valor pago mensalmente. Outro ganho é que o Edifício Comercial diversificou suas fontes de energia elétrica e assim permanecerá com alimentação elétrica quando houver interrupção no fornecimento da rede pública.

  4. Proceedings of the 24. National seminar on the rational use of energy and exposition of equipment and services and 7. Binational seminar on energy saving [Selected Papers]; 24. Seminario nacional sobre el uso racional de energia y exposicion de equipos y servicios y 7. Seminario binacional de ahorro de energia. Memoria Tecnica. [Ponencias seleccionadas

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    This document contains the technical briefings of the 24. National Seminar on the rational use of energy, and exhibition of the equipment and services and the 7. Binational seminar on energy saving, organized by the Asociacion de Profesionistas y Tecnicos en Aplicacion Energetica (ATPAE), in Ciudad Juarez, Chihuahua, Mexico, from November 9 to 11, 2005. This seminar dealt with subjects such as: electrical energy saving, energy distribution, solar energy, energy saving in compressed air, biomass, administration and control of the demand of the electrical energy, bioclimatic architecture, use of the compressed natural gas, renewable energy, co-generation, qualification and consultancy for the intelligent use of the energy in PyMES. [Spanish] Este documento contiene la memoria tecnica del 24 Seminario Nacional sobre el uso racional de energia, y exposicion de los equipos y servicios y el 7 Seminario binacional de ahorro de energia, organizado por la Asociacion de Tecnicos y Profesionistas en Aplicacion Energetica (ATPAE), en Ciudad Juarez, Chihuahua, Mexico, del 9 al 11 de noviembre del 2005. Este seminario trato temas tales como: ahorro de energia electrica, distribucion de la energia, energia solar, ahorro de energia en aire comprimido, biomasa, administracion y control de la demanda de la energia electrica, arquitectura bioclimatica, uso del gas natural comprimido, energia renovable, cogeneracion, capacitacion y consultoria para el uso inteligente de la energia en las Pymes.

  5. Electric energy saving in the cellulose and paper industry; Ahorro de energia electrica en la industria de celulosa y papel

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1993-12-31

    This paper delineates the results of the demonstration project for electric energy saving, which is one of the twenty four projects in which the Fideicomiso de Apoyo al Programa de Ahorro de Energia (FIDE) sponsors the diagnosis as well as the applied measures and the measures currently in application. Also the potential opportunity areas and the measures applied and in course of application, as well as the required investments and their recuperation periods. [Espanol] En este trabajo se describen los resultados del proyecto de demostracion de ahorro de energia electrica que es uno de los veinticuatro proyectos, en los que el Fideicomiso de Apoyo al Programa de Ahorro de Energia (FIDE) financia tanto el diagnostico como la aplicacion de medidas. Se presentan tanto las areas de oportunidad, potenciales y medidas aplicadas y en aplicacion, asi como las inversiones requeridas y los periodos de recuperacion de las mismas.

  6. Uma definição natural de energia cinética e potencial em termodinâmica

    OpenAIRE

    Ferreira,G.F. Leal

    2007-01-01

    Na tentativa de tornar a termodinâmica mais familiar e sem violação do seu formalismo, define-se a partir de expressão do diferencial da energia, já incorporando as conseqüências da 2 Lei, o diferencial da energia cinética como associado às variações de temperatura a volume constante e o de energia potencial às de volume, à temperatura constante. A comparação entre os diferenciais é realizada pela normalização das variações de temperatura e de volume às de pressão. Ver-se-á que na fase gasosa...

  7. Otimização da Contratação do Fornecimento de Energia Elétrica

    OpenAIRE

    Sousa, Vítor Manuel Neves de

    2016-01-01

    A nova realidade do sector elétrico a partir da desverticalização da sua cadeia de valor e abertura à concorrência das atividades de Produção e Comercialização fez emergir novas oportunidades para os consumidores de energia elétrica. Fruto dessas novas oportunidades, pretende-se com a presente dissertação simular e quantificar a redução de custos com a aquisição de energia elétrica, obtida a partir da análise e otimização dos contratos de energia elétrica em instalações reais. O objetiv...

  8. Electric energy saving in the cellulose and paper industry; Ahorro de energia electrica en la industria de celulosa y papel

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1992-12-31

    This paper delineates the results of the demonstration project for electric energy saving, which is one of the twenty four projects in which the Fideicomiso de Apoyo al Programa de Ahorro de Energia (FIDE) sponsors the diagnosis as well as the applied measures and the measures currently in application. Also the potential opportunity areas and the measures applied and in course of application, as well as the required investments and their recuperation periods. [Espanol] En este trabajo se describen los resultados del proyecto de demostracion de ahorro de energia electrica que es uno de los veinticuatro proyectos, en los que el Fideicomiso de Apoyo al Programa de Ahorro de Energia (FIDE) financia tanto el diagnostico como la aplicacion de medidas. Se presentan tanto las areas de oportunidad, potenciales y medidas aplicadas y en aplicacion, asi como las inversiones requeridas y los periodos de recuperacion de las mismas.

  9. RedeGasEnergia and associated technologies with industrial market; A RedeGasEnergia e as tecnologias associadas a aplicacoes industriais

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Antonio Luiz F. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Gas Natural; Lodi, Cristiane [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Rede Gas Energia

    2004-07-01

    The industrial segment shows a potential of consumption of about 40 millions m{sup 3}/d. This represent a great opportunity for RedeGasEnergia, a net of excellent with realize a cooperative and segmented work with Technology for development of natural gas once that at this moment this segment consume almost 20 millions m{sup 3}/d. The search for solutions economically and sustainable for replacing others energetics sources that are currently being used, placing emphasis on the quality of product, a concern with the environment, the need for technological development, the ease handling of equipment, safety regulations, those are the aims of the Industrial Applications of Technology. The development of projects in the technology field associate to combustion/conversion of industrial installations, acclimatization/refrigeration, industrial equipment, and new products and processes, which will make use of the natural gas has being our main goal nowadays. (author)

  10. CONSUMO DE ENERGIA ELÉTRICA: UMA ANÁLISE DE FONTE ALTERNATIVA DE COLETOR SOLAR DE BAIXO CUSTO

    Directory of Open Access Journals (Sweden)

    Ramon Alves de Oliveira

    2015-08-01

    Full Text Available Com o aumento do consumo de energia elétrica e tarifas, a procura por geração de energias alternativas vem crescendo gradativamente, principalmente que sejam de baixo custo, assim possibilitando uma maior inclusão social beneficiando também as residências de baixa renda. Com o espírito de inovação a pesquisa buscou ideias simples que possam contribuir para a sociedade buscando alternativas sustentáveis e de baixo custo para a economia de energia elétrica Esse artigo teve como objetivo desenvolver um Coletor Solar de baixo custo. A metodologia utilizada foi quantitativa descritiva de caráter exploratório. Os procedimentos adotados foram uma pesquisa bibliográfica e desenvolvimento de um protótipo como procedimento experimental para coleta de dados. Dados os resultados nota-se que os testes realizados com o coletor solar de baixo custo, obteve um resultado com a temperatura da água para o banho de 37,1°C superior ao do chuveiro elétrico de 35,5°C. Com esse resultado o coletor solar se mostra, eficiente no quesito temperatura de banho e uma alternativa eficiente para a geração de energia térmica para aquecimento da água, além de reduzir a energia elétrica consumida em uma residência ao substituir o chuveiro tradicional que tem mais de 5000W , que é considerado um vilão para o consumo de energia elétrica.

  11. GERAÇÃO DE ENERGIA ELÉTRICA A PARTIR DO BIOGÁS / ELECTRICITY GENERATION FROM BIOGAS

    Directory of Open Access Journals (Sweden)

    DAIANA G. MARTINEZ

    2013-11-01

    Full Text Available O presente trabalho teve como objetivo avaliar o sistema de geração de energia elétrica, através do uso do biogás proveniente de uma unidade produtora de suínos, localizada no município de São Miguel do Iguaçu, levando em consideração os aspectos relacionados ao consumo de biogás e geração de eletricidade. Foi utilizado um medidor de fluxo visando à contabilização da vazão de Biogás, utilizou-se GCP-22 que é o equipamento de controle e proteção do gerador, à aquisição de dados também foi realizada através de analisadores de energia. Estes analisadores registram a produção/consumo de energia em um intervalo de tempo de 15 minutos. Observou-se que o mês de maio teve o maior consumo, chegando a aproximadamente 18 mil m³ de biogás. Avaliando o período, a energia total gerada do conjunto moto gerador obteve um valor aproximado 110,3 MWh. O consumo de energia da propriedade foi de 55 MWh, sendo 16,8 MWh consumido da rede de distribuição. A energia excedente exportado para a rede de distribuição foi de aproximadamente 72 MWh. A geração média no período foi de 605,93 kWh. A média do consumo de biogás pelo conjunto moto gerador foi de 49,3 Nm³.h.

  12. Viabilidade económica da implementação de um reactor nuclear para a produção de energia eléctrica em Portugal

    OpenAIRE

    Pedro, Miguel António de Morais

    2012-01-01

    O presente trabalho tem como objectivo avaliar economicamente e determinar a viabilidade da implementação de um reactor nuclear para produção de energia eléctrica. Faz-se uma abordagem a aspectos da energia nuclear no mundo e em particular a energia nuclear na união europeia, faz-se uma análise sobre a estrutura do sector nuclear em Espanha e o futuro da energia no mundo. É realizada uma análise sobre a energia nuclear em Portugal, são abordados aspectos como o planeamento energético, a local...

  13. Velocidade e energia cinética da chuva de um emissor usado em pivô central

    OpenAIRE

    Ferreira, Denise de Jesus Lemos

    2014-01-01

    A erosão decorrente do escoamento superficial causa grande impacto no potencial produtivo das áreas cultivadas. Portanto, o estudo da velocidade e da energia cinética com que as gotas de água atingem a superfície do solo irrigado é de fundamental importância para o desenvolvimento de diagnósticos e medidas que visem minimizar os efeitos negativos no manejo das áreas irrigadas. Nesse sentido, o objetivo do trabalho foi avaliar a velocidade de impacto e a energia cinética de chuvas artificiais ...

  14. Competitive policies in the Nordic energy research and innovation area - eNERGIA : Part 3: Special reports

    Energy Technology Data Exchange (ETDEWEB)

    Klitkou, Antje; Pedersen, Trond Einar; Scordato, Lisa; Mariussen, Aage

    2008-07-01

    This report (Part 3: Special reports) is the third in a series of four reporting the results of the eNERGIA project. The first report presents the eight countries examined in the project - Denmark, Finland, Iceland, Norway, Sweden, Estonia, Latvia and Lithuania. The second report deals mainly with selected renewable energy technologies, which are discussed from different perspectives. The fourth report provides a summary of the whole project. The present report summarises the SWOT analyses of the Nordic countries and the eNERGIA workshops, and presents case studies of good practice. (Author) refs., 1 fig., 10 tabs

  15. Handbook of the energy sector 1992-1997; 1. ed.; Prontuario del sector de energia 1992-1997

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Fuentes, Adrian; Ylizaliturri Ridriguez, Jose Carlos; Aguilar Alejandre, Vicente; Gomez Chiu, Rebeca [Secretaria de Energia, Mexico, D. F. (Mexico)

    1998-12-31

    The planning of the energy sector requires a detailed knowledge of the relations that exist among the International markets of energy and the position of Mexico with respect to these. The Handbook of the energy sector 1992-1997 analyzes the tendency of the International markets of energy and the relative importance of the countries in relationship to its resources, production volumes, energy demand, fuel prices and foreign trade. It allows to know how and to what extent the energy sector has responded to the new economic conditions of the country and to the global tendencies, presenting statistics of easy consultation, updated information at International level on the reserves, installed capacity, production, consumption, prices and commerce of the main energy sources, and of the position of Mexico within this context. The information consists of seven chapters: First, analyzes the world-wide balance of energy, detailing the consumption of primary energy by region and source; in the second, the main crude petroleum statistics are analyzed, of selected countries; the third analyzes the refined products of petroleum, the fourth analyzes the world-wide natural gas reserves; the fifth the world-wide coal reserves and the sixth, the installed capacity of electricity generation in several countries. [Espanol] La planeacion del sector de energia requiere un conocimiento detallado de las relaciones que existen entre los mercados internacionales de energia y la posicion de Mexico con respecto a estos. El Prontuario del sector de energia 1992-1997 analiza la tendencia de los mercados internacionales de energia y la importancia relativa de los paises en relacion con sus recursos, volumenes de produccion, demanda de energia, precios de combustibles y comercio exterior. Permite conocer como y en que medida el sector de energia ha respondido a las nuevas condiciones economicas del pais y a las tendencias globales, al presentar estadisticas de facil consulta, de informacion

  16. Renewable energies in the national power supply; Energias renovables en la oferta energetica nacional

    Energy Technology Data Exchange (ETDEWEB)

    Huacuz Villamar, Jorge M [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    1999-07-01

    Mexico is a country endowed with abundant power resources. By the magnitude of its reserves and the installed production capacity. This article presents the different nonconventional energy resources which Mexico has, with the purpose of using them for the generation of electric energy. [Spanish] Mexico es un pais dotado de abundantes recursos energeticos. Por la magnitud de sus reservas y por la capacidad instalada de produccion. Este articulo presenta los diferentes recursos energeticos no convencionales con los que cuenta Mexico, con el fin de utilizarlos para la generacion de energia electrica.

  17. Evolution of energy conversion plants; Evoluzione delle macchine per la conversione dell'energia

    Energy Technology Data Exchange (ETDEWEB)

    Osnaghi, C. [Milan Politecnico, Milan (Italy). Dipt. di Energetica

    2001-06-01

    The paper concerns the evolution and the future development of energy conversion plants and puts into evidence the great importance of the scientific and technological improvement in machines design, in order to optimize the use of energy resources and to improve ambient compatibility. [Italian] L'articolo descrive l'evoluzione recente e lo sviluppo futuro degli impianti di conversione dell'energia, evidenziando la grande importanza del progresso scientifico e tecnologico nella progettazione delle macchine, al fine di ottimizzare l'uso delle risorse energetiche e migliorare la compatibilita' ambientale.

  18. The scenario of power generation in Brazil; O cenario da geracao de energia no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Dupim, Ivaldete da Silva [Universidade Federal do ABC, Santo Andre, SP (Brazil); Abreu Junior, Otavio Castor de; Moreira, Joao Manoel Losada; Carajilescov, Pedro; Leite, Patricia Teixeira; Cicogna, Marcelo A.

    2008-07-01

    The values concerning to the production of national power today, the evolution of composition and the installed capacity of electric matrix between the years 1980-2005, the outlook for demand and supply of energy according to the 'Plano Decenal de Energia' (2006-2015) were used as information basis for this study and analysis of some peculiar characteristics of the management of the energy sector in Brazil. The main objective was to highlight the importance of hydroelectric generation in Brazil. Finally we tried to make the comparison of the costs of hydroelectric generation in relation to other alternative sources available in the country.

  19. O nexo água, energia e alimentos no contexto da Metrópole Paulista

    OpenAIRE

    GIATTI, LEANDRO LUIZ; JACOBI, PEDRO ROBERTO; FAVARO, ANA KARINA MERLIN DO IMPERIO; EMPINOTTI, VANESSA LUCENA

    2016-01-01

    RESUMO Em face do contexto de contingências e interdependências inerentes ao desenvolvimento sustentável, emerge a recente abordagem do nexo de compensações e/ou possíveis sinergias nas demandas e provimentos de água, energia e alimentos, ao que se dirige este texto enquanto uma contribuição conceitual e ensaio de aplicação e problematização, enfocando o recorte territorial da Macrometrópole Paulista. Nesta análise, pautamos desafios de aplicabilidade do nexo quanto a escalas espacial e tempo...

  20. PROSPECÇÃO EM SIMULADOR DE ENERGIA ELÉTRICA

    OpenAIRE

    Ribeiro, Elisalvo Alves; Universidade Federal de Sergipe; Nunes, Maria Augusta Silveira Netto; Universidade Federal de Sergipe

    2014-01-01

    O processo de educar a população, em relação ao hábito de consumo consciente, é uma árdua tarefa, visto que as pessoas vivem em torno de aparatos tecnológicos que evoluem com uma velocidade nunca antes vivida pela humanidade, os quais oferecem mais comodidade, porém, em contrapartida incita-se a consumir mais energia. Assim, um dos meios de auxiliar as pessoas a terem um consumo consciente, é possibilitando-lhes mensurar seus consumos diários, através de um simulador de consumo, onde este pos...

  1. Materiais para as tecnologias da energia: desafios e o papel da reciclagem 

    OpenAIRE

    Nogueira, C. A.

    2014-01-01

    A indústria da energia, nomeadamente as tecnologias renováveis e de baixo carbono, necessita de matérias-primas, algumas raras e mesmo consideradas críticas, para produzir os materiais de que necessita para o seu desenvolvimento. Muitos desses materiais são escassos na Europa, colocando-a numa posição de grande dependência e fragilidade. A utilização dos resíduos como fontes secundárias dessas matérias-primas é uma das medidas essenciais para enfrentar este desafio. Neste artigo discute-se es...

  2. Epidemiologia das lesões traumáticas de alta energia em idosos

    OpenAIRE

    Katz,Márcio; Okuma,Marcos Antônio Akira; Santos,Alexandre Leme Godoy dos; Guglielmetti,Cesar Luiz Betoni; Sakaki,Marcos Hideyo; Zumiotti,Arnaldo Valdir

    2008-01-01

    O aumento proporcional de idosos na população mundial associado à melhoria nas condições de saúde e suporte preventivo para essa faixa etária, permite forma de vida mais ativa, expondo-os a risco mais elevado de acidentes e traumas de alta energia. Esses pacientes têm características fisiológicas, doenças associadas, padrão comportamental e complicações pós-operatórias que levam a resposta sistêmica diferente dos demais grupos etários. Esse trabalho avaliou prospectivamente 28 pacientes com i...

  3. Crise financeira, energia e sustentabilidade no Brasil Financial crisis, energy and sustainability in Brazil

    Directory of Open Access Journals (Sweden)

    Oswaldo Lucon

    2009-01-01

    Full Text Available A recente crise financeira global traz consigo efeitos como a redução da atividade econômica e, consequentemente, do consumo de energia. Essa pode ser uma importante oportunidade para reorganizar o sistema energético em bases mais sólidas e sustentáveis: a eficiência, a maior participação das fontes renováveis e a descentralização da produção de energia. O Brasil e outros países em desenvolvimento podem aproveitar a experiência dos países desenvolvidos em eficiência energética, complementando com um programa vigoroso em energias renováveis, particularmente as "modernas" (eólica, solar, biomassa e pequenas hidrelétricas. Entretanto, preocupa o cenário inercial nacional, baseado num aumento da participação das fontes fósseis de energia na matriz, na priorização dos recursos à exploração de petróleo e gás natural e na manutenção de padrões insustentáveis de produção e consumo.The recent global financial crisis brings about effects such as a reduction in the economic activity and consequently in energy consumption. This may be an important opportunity to reorganize the energy system under more solid and sustainable foundations: efficiency, higher share of renewables and decentralized energy production. Brazil and other developing countries can leapfrog the experience acquired by developed nations in energy efficiency, complementing with a vigorous program in renewables, particularly the "modern" (wind, solar, biomass and small hydros. However, there is a concern about the inertial Brazilian scenario, based on an increasing share of fossil fuels in the matrix, in prioritizing resources to oil and gas exploration and in the continuing unsustainable patterns of production and consumption.

  4. Fontes de energias alternativas e os desafios para a cadeia produtiva automotiva

    OpenAIRE

    Alves, Marcelo Ivanildo dos Santos

    2011-01-01

    Resumo: A indústria automotiva sempre esteve envolta num processo permanente de inovações e mais recentemente ela vem passando por várias e importantes mudanças. Essas mudanças decorrem de três fatores fundamentais: motivações ambientais, preço do petróleo e novos mercados. Num cenário de aperfeiçoamento dos padrões atuais de propulsão veicular, percebe-se o surgimento de fontes de energias alternativas. Onde o etanol surge como alternativa e poderá ser adotado em determinados mercados, como ...

  5. Wind energy for electricity generation; Generacion electrica con energia del viento

    Energy Technology Data Exchange (ETDEWEB)

    Huacuz Villamar, Jorge M; Borja Diaz, Marco Antonio R. [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-09-01

    A description is made of electricity generation utilizing wind energy (Eoloelectric Generation). The case of Mexico is reviewed in respect to this technology, mentioning a small power plant of 1.5 Megawatts installed by the Comision Federal de Electricidad in the zone of La Ventosa in the State of Oaxaca. Mention is made of the possible causes why Mexico has not advanced in this type of power plants for power generation as in other countries like Germany, Spain and India. The advance in these countries is shown as well as the growth statistics of the wind power in the world. It is concluded that there is not in Mexico a strategy for wind energy utilization for electricity generation in spite of the potential benefits this technology offers [Espanol] Se describe el caso de la generacion electrica utilizando la energia del viento (Generacion Eoloelectrica). Se aborda el caso de Mexico respecto a esta tecnologia, mencionando una pequena central de 1.5 Megawatts (MW) instalada por la Comision Federal de Electricidad (CFE) en la zona de la Ventosa, Oaxaca. Se mencionan las posibles causas por las que en Mexico este tipo de centrales de generacion de energia no ha avanzado como en otros paises, por ejemplo: Alemania, Espana y la India. Se muestran los avances de estos paises, asi como una estadistica del crecimiento de la generacion eoloelectrica en el mundo. Se concluye en que no existe en Mexico una estrategia para la generacion eoloelectrica a pesar de los beneficios potenciales que ofrece esta tecnologia

  6. Potential of energy saving with photovoltaic systems; Potencialidad de ahorro de energia con sistemas fotovoltaicos

    Energy Technology Data Exchange (ETDEWEB)

    Guzman S, Eusebio; Bratu S, Neagu [Universidad Autonoma Metropolitana, Mexico, D. F. (Mexico)

    1998-12-31

    This paper presents an approach on the application of photovoltaic systems in energy saving. The problem of the electric energy demand in the coming years is analyzed and its consequences on the environment and on the energy reserves of conventional sources. A model of the electric circuit equivalent to a photovoltaic cell illustrates the behavior of the photovoltaic cell in function of the climatological conditions. The former in order to show some of the limiting factors in this type of generator. Also, the evolution of the applications of the photovoltaic systems and its forecasting in the installed capacity in the next 20 years, is described. [Espanol] En este trabajo se presenta un enfoque de la aplicacion de los sistemas fotovoltaicos en el ahorro de energia. Se plantea el problema del crecimiento de la demanda energetica en los proximos anos y sus consecuencias sobre el medio ambiente y las reservas de energia por fuentes convencionales. Un modelo del circuito electrico equivalente de una celda fotovoltaica ilustra el comportamiento del generador fotovoltaico en funcion de las condiciones climatologicas. Lo anterior con el fin de mostrar algunas limitantes de este tipo de generador. Tambien se describe la evolucion de las aplicaciones de los sistemas fotovoltaicos y el pronostico de la potencia instalada en los proximos 20 anos.

  7. Wind power prognosis statistical system; Sistema estadistico de pronostico de la energia eoloelectrica

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Garcia, Alfredo; De la Torre Vega, Eli [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2009-07-01

    The integration of the first Aeolian farm of large scale (La Venta II) to the National Interconnected System requires taking into account the random and discontinuous nature of the Aeolian energy. An important tool, for this task, is a system for the prognosis of the Aeolian energy in the short term. For this reason, the Instituto of Investigaciones Electricas (IIE) developed a statistical model to realize this prognosis. The prediction is done through an adaptable linear combination of alternative competing models, where the weights given to each model are based on its more recent prognosis quality. Also, the application results of the prognoses system are presented and analyzed. [Spanish] La integracion de la primera grana eolica de gran escala (La Venta II) al Sistema Interconectado Nacional requiere tomar en cuenta la naturaleza aleatoria y discontinua de la energia eolica. Una importante herramienta, para esta tarea, es un sistema para el pronostico de la energia eolica a corto plazo. Por ello, el Instituto de Investigaciones Electricas (IIE) desarrollo un modelo estadistico para realizar este pronostico. La prediccion es hecha a traves de una combinacion lineal adaptable de modelos competidores alternativos, donde los pesos dados a cada modelo estan basados en su mas reciente calidad de pronostico. Tambien se presentan y analizan los resultados de la aplicacion del sistema de pronosticos.

  8. Potential of energy saving with photovoltaic systems; Potencialidad de ahorro de energia con sistemas fotovoltaicos

    Energy Technology Data Exchange (ETDEWEB)

    Guzman S, Eusebio; Bratu S, Neagu [Universidad Autonoma Metropolitana, Mexico, D. F. (Mexico)

    1999-12-31

    This paper presents an approach on the application of photovoltaic systems in energy saving. The problem of the electric energy demand in the coming years is analyzed and its consequences on the environment and on the energy reserves of conventional sources. A model of the electric circuit equivalent to a photovoltaic cell illustrates the behavior of the photovoltaic cell in function of the climatological conditions. The former in order to show some of the limiting factors in this type of generator. Also, the evolution of the applications of the photovoltaic systems and its forecasting in the installed capacity in the next 20 years, is described. [Espanol] En este trabajo se presenta un enfoque de la aplicacion de los sistemas fotovoltaicos en el ahorro de energia. Se plantea el problema del crecimiento de la demanda energetica en los proximos anos y sus consecuencias sobre el medio ambiente y las reservas de energia por fuentes convencionales. Un modelo del circuito electrico equivalente de una celda fotovoltaica ilustra el comportamiento del generador fotovoltaico en funcion de las condiciones climatologicas. Lo anterior con el fin de mostrar algunas limitantes de este tipo de generador. Tambien se describe la evolucion de las aplicaciones de los sistemas fotovoltaicos y el pronostico de la potencia instalada en los proximos 20 anos.

  9. Management report 2007 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2007 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This document reports the general activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2007, involving the CNEN role in the public policy execution, the Brazilian program of nuclear activities in the areas of nuclear safety, research and development, radiopharmaceutical production, teaching, administration in general and miscellaneous.

  10. Management report 2004 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2004 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-03-15

    This document reports the results of the activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2004, involving the Brazilian program of nuclear activities in the areas of nuclear safety, research and development, radiopharmaceutical production, institutional management, teaching, administration in general and miscellaneous.

  11. Eesti Energia lubab võlgades paberivabriku elektrita jätta / Eiris Teeveere, Päären Mardiste

    Index Scriptorium Estoniae

    Teeveere, Eiris

    2008-01-01

    Eesti Energia lülitab välja elektri Kehras asuvas Horizon Tselluloosi ja Paberivabrikus, kui võlgu tähtajaks ei maksta. Tehase sulgemine tooks kaasa 500 inimese töötuks jäämise ning reovee puhastuse lõppemise

  12. Adoção da energia solar fotovoltaica em hospitais: revisando a literatura e algumas experiências internacionais

    Directory of Open Access Journals (Sweden)

    Juliane Barbosa dos Santos

    2013-09-01

    Full Text Available O Sol possui um papel de extrema importância para a existência dos seres humanos e o Brasil possui uma posição geográfica privilegiada para explorar a luz solar. A união desses dois fatores favorece o uso de células solares para conversão de energia solar em energia elétrica por meio da tecnologia fotovoltaica, tornando-se ótima alternativa de energia, principalmente por ser uma fonte limpa, gerando menores danos ao meio ambiente. Este trabalho tem por objetivo abordar a tecnologia fotovoltaica tendo como foco analítico os hospitais, por meio de casos de sucesso encontrados na literatura internacional. Os hospitais, mesmo executando serviços de total importância à sociedade, apresentam potencial poluidor capaz de causar danos à saúde das pessoas e ao meio ambiente que se localiza ao seu redor. Há estimativas de que as reservas brasileiras de petróleo sejam suficientes para 22 anos, tornando-se necessária a busca por novas fontes alternativas para a geração de energia.

  13. Interazione onda struttura in un dispositivo di conversione dell'energia da onda a tracimazione e probematiche progettuali

    DEFF Research Database (Denmark)

    Vicinanza, D.; Margheritini, Lucia; Zanuttigh, B.

    2010-01-01

    Il presente lavoro riassume i risultati inerenti l’interazione delle onde con un innovativo cassone frangiflutti per la produzione d’energia elettrica denominato Seawave Slot-cone Generator (SSG). Il funzionamento dell’SSG é basato sul noto principio della tracimazione e della conservazione dell’...

  14. ANÁLISE EXPERIMENTAL DA INFLUÊNCIA DA TECNOLOGIA HOMEPLUG NA QUALIDADE DA ENERGIA ELÉTRICA

    Directory of Open Access Journals (Sweden)

    Antonio Luiz Pereira de Siqueira Campos

    2008-03-01

    Full Text Available Trabalhos recentes têm estudado características do meio elétrico para a transmissão de dados, ruídos e técnicas empregadas na comunicação pela rede elétrica. A maioria dos trabalhos limita-se a fazer testes de desempenho do protocolo. Diversos pesquisadores têm se preocupado com a influência das transmissões de dados na rede elétrica sobre as comunicações sem fio, mas ninguém tem se preocupado com a influência dessas transmissões na qualidade da energia elétrica. Este trabalho apresenta resultados preliminares sobre o efeito produzido por redes de computadores que utilizam a tecnologia Homeplug 1.0 na qualidade da energia elétrica. Para isso, foram escolhidos parâmetros apropriados para análise da qualidade da energia elétrica, bem como, foram definidas as formas de se obter esses parâmetros. Foi montada uma rede de computadores, com modem’s PLC, no CEFET-RN e realizados testes iniciais para medição da qualidade de energia elétrica. Resultados numéricos são apresentados.

  15. Strategies for energy saving in warm climate dwellings; Estrategias de ahorro de energia para viviendas en clima calido

    Energy Technology Data Exchange (ETDEWEB)

    Pilatowsky, I [Centro de Investigacion en Energia, Universidad Nacional Autonoma de Mexico (Mexico); Ramos Niembro, Gaudencio [Comision Nacional para el Ahorro de Energia -CONAE (Mexico); Morillon, David [Instituto de Ingenieria, Universidad Nacional Autonoma de Mexico (Mexico); Oskam, A. [Centro de Fisica Aplicada y Tecnologia Avanzada, Universidad Nacional Autonoma de Mexico (Mexico)

    2008-04-15

    The domestic sector consumes almost one quarter of the national electrical energy. In order to reduce in an important manner the power consumption in dwellings there is an integral alternative based on three elements: the bio-climatic design, the saving and efficient use of the energy in equipment and apparatuses, and the use of centralized air conditioning systems. Besides saving the electrical and thermal power consumption, with this scheme, comfort conditions are pretended to be reached in dwellings and, contributing at the same time, to the diminution of polluting emissions. [Spanish] El sector domestico consume casi una cuarta parte de la energia electrica nacional. Con objeto de reducir de manera importante el consumo de energia en las viviendas, se presenta una alternativa integral, basada en tres elementos: el diseno bioclimatico, el ahorro y uso eficiente de la energia en equipos y aparatos, y la utilizacion de sistemas de climatizacion centralizados. Ademas del ahorro en el consumo de energia electrica y termica, con este esquema se pretende alcanzar condiciones de confort en las viviendas y, al mismo tiempo, contribuir a la disminucion de emisiones contaminantes.

  16. Management report 2005 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2005 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-03-15

    This document reports the results of the activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2005, involving the Brazilian program of nuclear activities in the areas of nuclear safety, research and development, radiopharmaceutical production, institutional management, teaching, administration in general and miscellaneous.

  17. Management report 2006 CNEN - Brazilian Nuclear Energy Commission; Relatorio de gestao 2006 CNEN - Comissao Nacional de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-03-15

    This document reports the results of the activity management of the Comissao Nacional de Energia Nuclear - CNEN - Brazil during the year of 2005, involving the Brazilian program of nuclear activities in the areas of nuclear safety, research and development, radiopharmaceutical production, institutional management, teaching, administration in general and miscellaneous.

  18. Energia e sustentabilidade: desafios do Brasil na expansão da oferta e na gestão da demanda

    OpenAIRE

    Hollanda, Lavínia; Varejão, Mônica

    2014-01-01

    Esse caderno é fruto de uma parceria entre a FGV Energia e a Catavento, que somaram esforços no intuito de estimular um novo olhar sobre os dilemas enfrentados no setor de energia no Brasil. Alimentar o debate em torno de questões primordiais, que afetam tanto as possibilidades de expansão das fontes de energia, quanto o papel da demanda, em um contexto de uso eficiente de recursos naturais e restrições crescentes às emissões de gases de efeito estufa, é a premissa desse trabal...

  19. Inovar na produção de energia elétrica a partir do vento. O recurso a postes de eletricidade existentes

    OpenAIRE

    Franco, Miguel Leichsenring

    2012-01-01

    O vento é utilizado há milhares de anos para suprir as necessidades energéticas da atividade humana. A energia eólica é, como a maioria das fontes de energia renovável, uma forma de energia solar, tendo origem no aquecimento da atmosfera pelo sol, que põe em movimento as massas de ar. A rotação da terra, a forma e cobertura da superfície terrestre e os planos de água, influenciam por seu turno o regime dos ventos, ou seja, a velocidade, direção e variabilidade do vento...

  20. Electrical energy saving in motors and frequency variators; Ahorro de energia electrica en motores y variadores de frecuencia

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Neri, Roger [Comision Federal de Electricidad (CFE) (Mexico)

    2005-07-01

    The necessity of saving energy is urgent and undeniable. We must already begin with the rational use of energy. Which is obtaining the maximum benefit of the consumed energy and of the necessary facilities for its generation, transmission and use. Guaranteeing at the same time an operation free of interferences or interruptions for the users. The electricity in alternating current does not allow its storage, reason why it is necessary to generate and distribute it at the precise moment when it is required. This forces to determine the proportions of the generation facilities, to be able to feed the periods of maximum demand called {sup p}eaks{sup .} It is this very point where the problem of the inappropriate use of the electrical energy starts. The energy waste is self-evident during the periods of low demand because of the low efficiency of the sub-utilized facilities. Electrical motors of the induction type use approximately more than 60% of the energy in the industry. If we use high efficiency motors instead of standard motors, a better advantage of the energy demanded from Comision Federal de Electricidad (CFE) is obtained. [Spanish] Es impostergable e innegable la necesidad de ahorrar energia. Tenemos que empezar ya con el uso racional de la energia: Obtener el maximo beneficio de la energia consumida y de las instalaciones necesarias para su generacion, transmision y utilizacion. Garantizando a los usuarios un funcionamiento sin interferencias o interrupciones. La electricidad en corriente alterna no permite su almacenamiento, por lo que es necesario generarla y distribuirla en el momento preciso en que es requerida. Esto obliga a dimensionar las instalaciones de generacion, para poder alimentar los periodos de maxima demanda llamados pico. Desde esta parte inicia el problema de la mala utilizacion de la energia electrica. Ya que en los periodos de baja demanda, las instalaciones se encuentran subutilizadas y si su eficiencia es muy baja, el desperdicio de

  1. The electric energy and the environment in Mexico. Volume 3; Energia electrica y medio ambiente en Mexico. Volumen 3

    Energy Technology Data Exchange (ETDEWEB)

    Quintanilla Martinez, Juan [eds.] [Universidad Nacional Autonoma de Mexico, Mexico, D. F. (Mexico)

    1997-12-31

    This document is the third one of three volumes of the 1. Seminar on the Current Conditions and Perspectives of the Electric Sector in Mexico, organized by the Programa Universitario de Energia and the Instituto de Investigaciones Economicas (University Program of Energy and the Institute of Economic Research), both of them agencies of the Universidad Autonoma de Mexico (UNAM). The titles of the three volumes are the following: Volume 1.- The opening of the Mexican Electric Sector to foreign investment. Volume 2.- Concrete innovation and technological learning experiences at the Luz y Fuerza del Centro enterprise. Volume 3.- The Electric Energy and the Environment in Mexico. This third volume covers the following subjects: Hydroelectricity, land use and water managing; the electric generation in Mexico and its environmental impact, the nuclear electricity and the handling of radioactive materials; the exposure to electromagnetic fields and its association with children`s leukemia; the energy in Mexico and the sustainable development; potential of electricity generation in large scale with wind power in Mexico; towards a scheme of distributed electric power generation with non-conventional energies and renewable energy sources in Mexico in the 21Century. These documents were elaborated by specialists of the electric sector, from the sector itself as well as from private and public academic entities [Espanol] Este documento constituye el tercero de tres volumenes del Primer Seminario sobre Situacion y Perspectivas del Sector Electrico en Mexico, organizado por el Programa Universitario de Energia y el Instituto de Investigaciones Economicas, ambas dependencias de la Universidad Nacional Autonoma de Mexico (UNAM). Los titulos de los tres volumenes son los siguientes: volumen 1: La apertura externa del sector electrico mexicano, volumen 2: Experiencias concretas de innovacion y aprendizaje tecnologico en la empresa Luz y Fuerza del Centro, volumen 3: Energia electrica

  2. L’utilizzo della ricostruzione nella comunicazione del patrimonio archeologico. L’approccio, il metodo, le finalità e alcuni spunti di discussione.

    Directory of Open Access Journals (Sweden)

    Elena Bacci

    2010-05-01

    In questo contributo si focalizza l’attenzione sulla ricostruzione grafica e virtuale del patrimonio e sulle sensazioni che la ricostruzione evoca nel fruitore del messaggio culturale. La ricostruzione si attua mediante la collaborazione tra archeologo e illustratore e costituisce un momento di verifica visiva dell’interpretazione archeologica e uno strumento di comunicazione del dato archeologico fruibile a più livelli. Ciò avviene grazie allo scambio costante di informazioni (dati scientifici e proposte di ricostruzione e il confronto che ne deriva determina i metodi e le fasi di avanzamento del progetto. Il metodo si basa sull’integrazione delle immagini 3D con il disegno tradizionale ed è finalizzato alla trasposizione del dato archeologico, in modo tale da garantire alla ricostruzione il duplice requisito di soddisfazione estetica e credibilità scientifica.

  3. FONTES ALTERNATIVAS E RENOVÁVEIS DE ENERGIA NO BRASIL: MÉTODOS E BENEFÍCIOS AMBIENTAIS

    Directory of Open Access Journals (Sweden)

    Raphael Santos do Nascimento

    2017-01-01

    Full Text Available Resumo: Atualmente, os recursos renováveis tem sido o foco de inúmeras pesquisas, devido à preocupação com o meio ambiente. Nesse sentido, várias são as razões para a implementação de fontes renováveis de energia. Assim, o objetivo desse estudo foi identificar os diferentes tipos de energias renováveis existentes no Brasil, bem como, a aplicabilidade e o impacto ambiental gerado por essas fontes. O trabalho foi desenvolvido sobre os preceitos do estudo exploratório por meio de uma pesquisa bibliográfica. Foram identificados cinco tipos de energias alternativas renováveis no Brasil, Biomassa, Eólica, Geotérmica, Hidráulica, Marítima e Solar. A energia Solar foi considerada a mais viável em função de sua aplicabilidade, mesmo em locais isolados, do potencial encontrado em todo território, e, a redução dos impactos ambientais. Foram consideradas expressivas as diferenças de impacto ambiental entre as fontes estudadas e as fontes não-renováveis. Ainda, identificou-se que mesmo com diversas alternativas energéticas e um imenso potencial de recursos renováveis, a utilização desses recursos no Brasil deve ser considerada insuficiente para geração de energia.

  4. Renewable energy to produce electricity; Nuevas fuentes de energia para producir electricidad

    Energy Technology Data Exchange (ETDEWEB)

    Cadenas Tovar, Roberto; Lopez Rios, Serafin [Gerencia de Proyectos Geotermoelectricos de la Comision Federal de Electricidad, Morelia (Mexico)

    1996-05-01

    There are several new energy sources to produce electricity. One of them is the wind energy, which has reached huge commercialization in worldwide. There are in Mexico some zones with high speed wind, which can be used in a short term. This has been proved by the wind pilot power plant of La Venta, Oaxaca, where production costs of US 4.3 cents per kilowatt-hour (kWh) have been obtained. These costs are among the lowest in the world. By the other hand, among the main uses of solar energy, including both thermal and photovoltaic techniques, the biggest thermo-solar utility, with 350 megawatts (MW) of capacity, is remarkable. This is the plant located in the Mojave Desert, California, USA. In Mexico there is big potential, which can make an important contribution to supplies of electricity. Biomass is another important renewable source, particularly the use of solid municipal waste, the livestock and the wood waste. Finally, other alternate technique is represented by the fuel cells, though it is not properly renewable. However, considering its modular and low environmental impact characteristics, it can get a wide commercial development in the next decade. [Espanol] Existen diversas fuentes nuevas de energia para generar electricidad. Entre ellas, la energia eolica es una de las tecnologias alternas que mayor comercializacion ha alcanzado a nivel mundial. Mexico posee zonas con vientos de velocidades altas en las que su aplicacion puede ser inmediata, como lo prueba la experiencia obtenida con la central piloto de La Venta, Oaxaca, en donde se han alcanzado costos de produccion de 4.3 centavos de dolar por kilowatt-hora (kWh), de los mas bajos a nivel internacional. Por otra parte, entre las principales aplicaciones de la energia solar, en sus tecnologias termica y fotovoltaica, destaca el mayor de los aprovechamientos termosolares, con 350 megawatts de capacidad (MW), localizado en el desierto de Mojave, en California, EUA. En Mexico hay un gran potencial

  5. Economizing energies in urban public transportation; Como economizar energias en el transporte publico urbano

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Arellano, Ignacio [Universidad Autonoma del Estado de Mexico, Toluca (Mexico)

    1998-12-31

    In the transportation sector one of the questions that we should keep on asking on the subject of energy saving is: What objective should be set for reducing the energy consumption (particularly in oil derivatives). Must it be a moderate or a strong measure? In the past years this question was very much related to the oil availability that is a non-renewable resource, nevertheless, with the elapsing of time it can be said that the available oil resources are still very large, the problem is now in function of the energy prices in the mid term and this is what will take us to establish a type of policy for the reduction of the use of fuels in transportation. The purpose of this paper, is to have the support of the transportation users informing and persuading them on the need of reducing the fuel consumption rationalizing its utilization, to ensure in our cities a relatively fluid circulation, a breathable air, a better landscape and a protection to the urban sites. Although these proposals belong in a direct way to our governments, the base of their definition will be the perspectives for the country`s development, the amount of oil reserves, the international situation and the technological advances. [Espanol] En el sector de los transportes una de las preguntas que nos deberiamos seguir haciendo, sobre el tema de ahorro de energia es que objetivo debera fijarse para reducir los consumos de energia (en particular de los derivados del petroleo) debe ser una medida fuerte o moderada. En anos pasados esta pregunta estaba muy relacionada con la disponibilidad del petroleo que es un recurso no renovable, sin embargo con el transcurso del tiempo se puede decir que los recursos disponibles de petroleo son aun muy grandes, el problema ahora esta en funcion de los precios de la energia en el mediano plazo, y es esto lo que nos llevara a fijar un tipo de politica para la reduccion de combustibles en los transportes. El proposito de este trabajo es contar con el apoyo de los

  6. The alternative and renewable energy sources in Mexico; Fuentes alternativas y renovables de energia en Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Urbano C, J Antonio [Instituto Politecnico Nacional, Mexico, D. F. (Mexico); Matsumoto K, Yasuhiro; Asomoza P, Rene [Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional, Mexico, D. F. (Mexico)

    1997-12-31

    This paper presents an overview of the efforts that have been made in our Mexico in the area of Alternative and Renewable Sources of Energy, effort performed by different institutions, government agencies and private companies along the last 25 years. Older periods are not contemplated, although significant advances have existed, specifically in the area of small micro-hydraulic power plants, since the end of the past century and in solar collectors, more than 60 years ago, as the most relevant advances have been contemplated in these last two decades. The entire world energy demand is analyzed, making emphasis in our country, the efforts on the installed geothermal power plants, the flat collectors for domestic use, the solar power plants installed by some government agencies are also mentioned, as well as the strong growth in the photo-voltaic field at worldwide level as well as at domestic level (a graph is presented of the multiple applications of the photo-voltaic conversion of the solar energy at world level of which some of these are already operational in our country), including the hybrid systems (wind power photo-voltaic Diesel, the pilot biogas plants, the solar ponds efforts and the recently inaugurated wind-power plant of 1.575 MW installed at La Venta, in the Oaxaca State. [Espanol] El presente articulo, presenta una revision de los esfuerzos que se han desarrollado en nuestro Mexico, en el campo de las Fuentes Alternas y Renovables de Energia, esfuerzos realizados por diferentes instituciones, dependencias y companias a lo largo de los ultimos 25 anos. No se contemplan periodos mas antiguos, aunque han existido adelantos significativos, especificamente, en el campo de pequenas centrales microhidraulicas desde fines del siglo, y de colectores solares desde hace mas de 60 anos, ya que los mas relevantes se contemplan en estas ultimas dos decadas de recopilacion. Se analiza la demanda de energia mundial, haciendo enfasis a nuestro pais, se mencionan los

  7. The alternative and renewable energy sources in Mexico; Fuentes alternativas y renovables de energia en Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Urbano C, J. Antonio [Instituto Politecnico Nacional, Mexico, D. F. (Mexico); Matsumoto K, Yasuhiro; Asomoza P, Rene [Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional, Mexico, D. F. (Mexico)

    1996-12-31

    This paper presents an overview of the efforts that have been made in our Mexico in the area of Alternative and Renewable Sources of Energy, effort performed by different institutions, government agencies and private companies along the last 25 years. Older periods are not contemplated, although significant advances have existed, specifically in the area of small micro-hydraulic power plants, since the end of the past century and in solar collectors, more than 60 years ago, as the most relevant advances have been contemplated in these last two decades. The entire world energy demand is analyzed, making emphasis in our country, the efforts on the installed geothermal power plants, the flat collectors for domestic use, the solar power plants installed by some government agencies are also mentioned, as well as the strong growth in the photo-voltaic field at worldwide level as well as at domestic level (a graph is presented of the multiple applications of the photo-voltaic conversion of the solar energy at world level of which some of these are already operational in our country), including the hybrid systems (wind power photo-voltaic Diesel, the pilot biogas plants, the solar ponds efforts and the recently inaugurated wind-power plant of 1.575 MW installed at La Venta, in the Oaxaca State. [Espanol] El presente articulo, presenta una revision de los esfuerzos que se han desarrollado en nuestro Mexico, en el campo de las Fuentes Alternas y Renovables de Energia, esfuerzos realizados por diferentes instituciones, dependencias y companias a lo largo de los ultimos 25 anos. No se contemplan periodos mas antiguos, aunque han existido adelantos significativos, especificamente, en el campo de pequenas centrales microhidraulicas desde fines del siglo, y de colectores solares desde hace mas de 60 anos, ya que los mas relevantes se contemplan en estas ultimas dos decadas de recopilacion. Se analiza la demanda de energia mundial, haciendo enfasis a nuestro pais, se mencionan los

  8. Economizing energies in urban public transportation; Como economizar energias en el transporte publico urbano

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Arellano, Ignacio [Universidad Autonoma del Estado de Mexico, Toluca (Mexico)

    1999-12-31

    In the transportation sector one of the questions that we should keep on asking on the subject of energy saving is: What objective should be set for reducing the energy consumption (particularly in oil derivatives). Must it be a moderate or a strong measure? In the past years this question was very much related to the oil availability that is a non-renewable resource, nevertheless, with the elapsing of time it can be said that the available oil resources are still very large, the problem is now in function of the energy prices in the mid term and this is what will take us to establish a type of policy for the reduction of the use of fuels in transportation. The purpose of this paper, is to have the support of the transportation users informing and persuading them on the need of reducing the fuel consumption rationalizing its utilization, to ensure in our cities a relatively fluid circulation, a breathable air, a better landscape and a protection to the urban sites. Although these proposals belong in a direct way to our governments, the base of their definition will be the perspectives for the country`s development, the amount of oil reserves, the international situation and the technological advances. [Espanol] En el sector de los transportes una de las preguntas que nos deberiamos seguir haciendo, sobre el tema de ahorro de energia es que objetivo debera fijarse para reducir los consumos de energia (en particular de los derivados del petroleo) debe ser una medida fuerte o moderada. En anos pasados esta pregunta estaba muy relacionada con la disponibilidad del petroleo que es un recurso no renovable, sin embargo con el transcurso del tiempo se puede decir que los recursos disponibles de petroleo son aun muy grandes, el problema ahora esta en funcion de los precios de la energia en el mediano plazo, y es esto lo que nos llevara a fijar un tipo de politica para la reduccion de combustibles en los transportes. El proposito de este trabajo es contar con el apoyo de los

  9. Viabilidade de utilização de micro-turbinas eólicas para produção de energia elétrica

    OpenAIRE

    Oliva, João Miguel Ferreira

    2016-01-01

    A utilização de combustíveis fósseis para colmatar as necessidades energéticas tem vindo a aumentar continuamente as emissões de Dióxido de Carbono e outros gases de efeito estufa (GEE) que contribuem, também, para o aquecimento global. Uma das formas de minimizar estes efeitos negativos é com a utilização de energias renováveis, como a energia proveniente do sol, vento, ondas e biomassa. A energia do vento é utilizada para a produção de energia elétrica através de turbinas eólicas, estas pod...

  10. Energia Avastuskeskus : Tallinna Elektrijaama restaureerimine = Energy Discovery Centre : restoration of Tallinn Power Plant / Pelle-Sten Viiburg, Margit Argus, Margit Aule

    Index Scriptorium Estoniae

    Viiburg, Pelle-Sten

    2015-01-01

    Energia Avastuskeskus endises Tallinna Elektrijaama hoones Põhja pst 29, valminud 2014. Arhitektid Sander Aas, Margit Aule, Pelle-Sten Viiburg (KAOS Arhitektid), sisearhitekt Margit Argus (KAOS Arhitektid), ekspositsiooni kujundus Margit Argus ja Margit Aule. 2014. aasta Kultuurkapitali Arhitektuuripreemia kandidaat

  11. Uma abordagem jurídica à questão do ressarcimento de danos elétricos pelas distribuidoras de energia.

    OpenAIRE

    Ana Carolina Oliveira Salomão

    2012-01-01

    Com o aumento da necessidade e do consumo da energia elétrica, aliado a uma maior conscientização dos consumidores acerca de seus direitos e deveres perante a sociedade, constatou-se o surgimento de um crescente número de contendas envolvendo estes últimos e as concessionárias de energia elétrica, principalmente no que tange ao setor de distribuição de energia elétrica. Isto se deve à ocorrência de danos ocasionados por falhas na prestação do serviço público de energia elétrica, destacando-se...

  12. Energy conservation in ice manufacturing; Ahorro de energia en la fabricacion de hielo

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-12-31

    This paper shows the results of the energy diagnosis study for ice manufacturing industries. The identified opportunities for conservation and efficient use of energy have allowed the reduction of the electric bill, modernizing at the same time, its installations and addressing inherent aspects of the use of energy producing items; in which the estimated investments are recovered in its major part in a period of a year, the goodness of the investments propitiate the growth and competitiveness required in these days. [Espanol] En este documento se exponen los resultados del estudio del diagnostico energetico para industrias productoras de hielo. Las oportunidades de ahorro y uso eficiente de energia identificadas, han permitido reducir la facturacion energetica, a la par de modernizar sus instalaciones y atender aspectos inherentes al uso de energeticos; en lo cual las inversiones estimadas se recuperan en su mayoria en un ano, las bondades de las inversiones propician un crecimiento y competitividad requerida en estos dias.

  13. Project of renewable energy for agriculture; Proyecto de energia renovable para la agricultura

    Energy Technology Data Exchange (ETDEWEB)

    Montufar Avilez, Octavio [FIRCO (Mexico)

    2005-07-01

    The document presents a general design of the hydraulic system, a hydraulic design of cattle ranch and a hydraulic design by dripping. It also discusses the components of the energy project, which are: institutional fortification, promotion and diffusion, market development (studies), specifications and certification, investments, technical support and direction of the project. The objective of this project is to diminish ignorance in the sector, to reduce the investment costs and to obtain a long term-sustainable effect. [Spanish] En este documento se describe un diseno general del sistema hidraulico, un diseno hidraulico de ganaderia, un diseno hidraulico por goteo y los componentes del proyecto de energia que son: fortalecimiento institucional, promocion y difusion, desarrollo del mercado (estudios), especificaciones y certificacion, inversiones, asistencia tecnica y direccion del proyecto. El objetivo de este proyecto es minimizar el desconocimiento en el sector, reducir los costos de inversion y que el efecto sea sostenible a largo plazo.

  14. The Energy Regulatory Commission (1). Law of the Comision Reguladora de Energia

    International Nuclear Information System (INIS)

    1995-01-01

    The Energy Regulatory Commission. Reforms to the Electric Energy Public Service Law (1992) and the Regulatory Law of Article 27 on Petroleum (1995) have brought about fundamental changes in the electric and natural gas industries. The legal reforms explicitly permit the private sector to construct, operate, and own, systems of electric generation and natural gas transportation, storage and distribution. The participation of the private sector in these areas required a redefinition in the government regulatory institutions. Accordingly the Federal Congress enacted the law of the Comision Reguladora de Energia (CRE) in 1995. The CRE law expands the scope of the CRE's authority and the breadth of its powers beyond those established when it was initially created in 1993. The CRE commenced operations in January 1994 as a decentralized technical and consultative body of the Energy Ministry. The decree that created the Commission limited the scope of its authority to an analysis and consultative role applicable only to the electric industry. (Author)

  15. Carbon Bonds and the saving of energy; Bonos de carbono y el ahorro de energia

    Energy Technology Data Exchange (ETDEWEB)

    Alvarez Ramirez, Alejandro [NovaEnergia (Mexico)

    2005-07-01

    This document deals with the development of the carbon bond project, the energy saving and the entry into force of the Kyoto Protocol at a world-wide level. In this project Mexico opts for a development model in which the economic growth brakes ties with the discharge of greenhouse effect gases and in which the progress does not mean more damages to our planet. [Spanish] Este documento trata sobre el desarrollo del proyecto de bonos de carbono, ahorro de energia y la entrada en vigor del Protocolo de Kyoto a nivel mundial, en el cual Mexico opta por un modelo de desarrollo en el que el crecimiento economico esta desvinculado de la emision de gases de efecto invernadero y en donde el progreso no signifique mas danos a nuestro planeta.

  16. Energy conservation in ice manufacturing; Ahorro de energia en la fabricacion de hielo

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1993-12-31

    This paper shows the results of the energy diagnosis study for ice manufacturing industries. The identified opportunities for conservation and efficient use of energy have allowed the reduction of the electric bill, modernizing at the same time, its installations and addressing inherent aspects of the use of energy producing items; in which the estimated investments are recovered in its major part in a period of a year, the goodness of the investments propitiate the growth and competitiveness required in these days. [Espanol] En este documento se exponen los resultados del estudio del diagnostico energetico para industrias productoras de hielo. Las oportunidades de ahorro y uso eficiente de energia identificadas, han permitido reducir la facturacion energetica, a la par de modernizar sus instalaciones y atender aspectos inherentes al uso de energeticos; en lo cual las inversiones estimadas se recuperan en su mayoria en un ano, las bondades de las inversiones propician un crecimiento y competitividad requerida en estos dias.

  17. Energy and telecommunications public services; Servizi pubblici nei settori dell'energia e delle telecomunicazioni

    Energy Technology Data Exchange (ETDEWEB)

    Salini, M. P. [Ente Nazionale Idrocarburi SpA, Rapporti Istituzionali per l' Italia e l' Unione Europea, Milan (Italy)

    2001-03-01

    The aim of this work is the evolution of the energy and telecommunication public services. The article runs through the main stages in the public services' history and shows how open market rules may cause the future dissolution of public service notion. The conclusion wishes the hastening of public services privatisation and a Corporate Governance reform as a mean to pursue general interest. [Italian] Oggetto di questo lavoro e' l'evoluzione dei servizi pubblici nei settori dell'energia e delle telecomunicazioni. Se ne ripercorrono le principali tappe storiche e si evidenzia come le regole di apertura dei mercati possano causare la dissoluzione del concetto di servizio pubblico. Le conclusioni sottolineano la necessita' di accelerare la privatizzazione dei servizi pubblici e la riforma della Corporate Governance come strumento per il raggiungimento dell'interesse generale.

  18. Requerimentos de energia e nutrientes da população brasileira

    Directory of Open Access Journals (Sweden)

    Ignez Salas Martins

    1979-09-01

    Full Text Available Foram estimados os requerimentos de energia, proteínas, vitamina A, B1, B2, C, D, B12, ácido fólico e dos minerais ferro e cálcio da população brasileira. Foi utilizada a metodologia recomendada nos relatórios técnicos dos Comitês de Peritos FAO/OMS. Partindo-se da pressuposição de que, até 19 anos de idade, o indivíduo tem um potencial de desenvolvimento a ser atingido, as recomendações de energia foram estabelecidas tomando-se como referência o percentil 97 da população. Os requerimentos dos adultos foram estimados para o homem-tipo e mulher-tipo representativos da população brasileira do percentil 50. As recomendações de proteínas e dos demais nutrientes foram calculadas para atender as necessidades de 95% da população.The requirements for energy, proteins, vitamins - A, B1, B2, C, D, B12 - Folie acid, and iron and calcium were estimated and for this purpose the method recommended by the FAO/OMS committees was used. Based on the presupposition that an individual achieves a development potential by the age of 19, energy requirements were established using as references the 97th percentile of the population. Adult requirements were estimated for the typical-man and typical-woman, representative of the 50th percentile of the Brazilian population. The protein requirements and those of the other nutrients were calculated to meet the needs of the 95th percentile of the population.

  19. Energy saving in the sugar cane agroindustry; Ahorro de energia en la agroindustria azucarera canera

    Energy Technology Data Exchange (ETDEWEB)

    Zedillo Ponce de Leon, Luis [Grupo de paises Latinoamericanos y del Caribe exportadores de azucar (Mexico)

    1996-07-01

    The traditional sugar mill is inefficient from the energy point of view. Most of the sugar mills were designed to use all the available bagasse, due to the risk of spontaneous ignition and environmental pollution. Consequently, the steam generators, the turbines and other components were designed to work with low efficiencies. Each ton of sugar produced generates a power potential equivalent to four to six oil barrels (bagasse and residues). That is to say, a sugar mill is capable of producing 500 ton/day of sugar, equivalent to an oil well of 2000 to 3000 barrels/day and one thermoelectric power plant of 15,000 kW. Under this context an analysis is made of the sugar mills in Latin America and the Caribbean as one of the ways of increasing their efficiency and obtain great energy savings. As far as steam generation the appropriate use of energy is dictated by the boilers' efficiency. [Spanish] El ingenio azucarero tradicional es ineficiente desde el punto de vista energetico. La mayoria de los ingenios azucareros se disenaron para usar todo el bagazo disponible, debido al riesgo de ignicion espontanea y contaminacion. En consecuencia, los generadores de vapor, las turbinas y demas componentes fueron disenados para trabajar con bajas eficiencias. Cada tonelada de azucar producida genera una potencialidad energetica equivalente de cuatro a seis barriles de petroleo (bagazo y residuos). Es decir, un ingenio capaz de producir 500 ton/dia de azucar equivalente a un pozo de petroleo de 2000 a 3000 barriles/dia y una termoelectrica de 15000 kW. Bajo este contexto se hace un analisis del ingenio azucarero en Latinoamerica y el Caribe como una de las vias para incrementar su eficiencia y lograr grandes ahorros en la energia. En cuanto a generacion de vapor se refiere, el buen uso de la energia viene expresado por la eficiencia de las calderas.

  20. Energy saving in the management of the BIMBO group distribution fleet; Ahorro de energia en la operacion de la flotilla de distribucion del grupo BIMBO

    Energy Technology Data Exchange (ETDEWEB)

    Mexico, BIMBO

    2005-07-01

    In this work BIMBO demonstrates that in order to save energy it is necessary to invest in equipment, parts, research and people. This is why they got involved in the task of developing the projects of fuel cells participating with universities, associations, Secretaria de Energia, Comision Nacional de Ahorro de Energia (National Commission for Energy Saving) (CONAE) and the National Council for Science and Tecnologia (CONACYT), through financial supports with projects of mechanisms of clean development (Kyoto Protocol). For doing it they had to prove different types of fuels: biodiesel, hydrogen, alcohol and hybrids; for them to determine the most profitable and practical thus reducing the energy consumption. With the saving of fuels and lubricants in our vehicles, a greater yield in the company is obtained. [Spanish] En este trabajo BIMBO demuestra que para ahorrar energia hay que invertir en equipo, partes, investigacion y gente. Es por eso que se dieron a la tarea de desarrollar los proyectos de celdas de combustible, participando con universidades, asociaciones, la Secretaria de Energia, la Comision Nacional para el Ahorro de Energia (CONAE) y el Consejo Nacional para la Ciencia y Tecnologia (CONACYT), a traves de apoyos financieros con proyectos de mecanismos de desarrollo limpio (protocolo de Kyoto). Para ello tuvieron que probar diferentes tipos de combustibles: biodiesel, hidrogeno, alcohol e hibridos, para determinar los mas rentables y practicos y asi reducir el consumo de energia; con el ahorro de combustibles y lubricantes en nuestros vehiculos, logrando una mayor rentabilidad en la empresa.

  1. Avaliação da correção da energia pelo balanço de nitrogênio em alimentos para frangos de corte

    Directory of Open Access Journals (Sweden)

    R.C. Andrade

    2016-04-01

    Full Text Available Com o objetivo de determinar valores de energia metabolizável aparente e de energia metabolizável aparente corrigida pelo balanço de nitrogênio de alimentos para frangos de corte, bem como avaliar os efeitos da correção da energia sobre seu desempenho, foram conduzidos dois experimentos: I determinação da energia do milho, do farelo de soja, da farinha de carne e ossos, da farinha de vísceras e da farinha de penas, pelo método de coleta total de excretas, utilizando-se 450 pintos de corte com um dia de idade, distribuídos em delineamento inteiramente ao acaso, sendo seis tratamentos e cinco repetições; II desempenho de 960 frangos de corte, distribuídos ao acaso, em cinco tratamentos e seis repetições. As aves que receberam os tratamentos A (matriz energética de acordo com Rostagno et al. (2011 e E (energia sem correção com ajuste pela idade apresentaram melhor desempenho, e as aves do tratamento E tiveram melhor conversão alimentar. Portanto, formulações com energia sem correção pelo balanço de nitrogênio e ajustadas pela idade são viáveis tanto sob o ponto de vista zootécnico, quanto econômico.

  2. Lógica Fuzzy aplicada ao controle de um sistema híbrido de geração de energia elétrica: eólica, fotovoltaica e biogás

    OpenAIRE

    Reis, Luiz Octávio Mattos dos [UNESP

    2002-01-01

    Este trabalho desenvolve o estudo de um sistema híbrido para geração de energia elétrica a ser aplicado em pequenas comunidades rurais não servidas pelo serviço de eletrificação rural. Fatores geográficos e econômicos, em muitos casos, impossibilitam as empresas de energia em construírem sistemas de distribuição rurais. Mas estas pequenas comunidades rurais desenvolvem uma micro-economia, necessitando de energia elétrica. O sistema proposto produz energia a partir de fontes alternativas utili...

  3. Análise de um sistema de captura de energia piezoelétrico não linear e não ideal utilizando-se uma estrutura aporticada.

    OpenAIRE

    Itamar Iliuk

    2016-01-01

    A crescente utilização de novas tecnologias, as quais necessitam de uma fonte de energia menor e mais eficiente, como os microssensores para monitoramento de sistemas e estruturas nas chamadas cidades inteligentes, torna a captura da energia do ambiente uma opção viável para alimentação de tais dispositivos. Como a energia cinética é uma fonte de energia facilmente encontrada no ambiente, os sistemas que a capturam e convertem em eletricidade têm sido amplamente estudados, especialmente os qu...

  4. Desenvolvimento de um kit de irrigação por microtubos com moto-bomba propulsionada por energia solar

    OpenAIRE

    Luiz Ricardo Sobenko

    2016-01-01

    O bombeamento de água por meio da energia solar vem se mostrando uma alternativa para localidades onde outras fontes de energia não estão disponíveis ou são limitadas. Torna-se interessante aliar essa alternativa a um sistema de irrigação que opera com vazão e pressão relativamente baixas, como a irrigação localizada por microtubos, possibilitando assim a obtenção de alta eficiência. No presente trabalho teve-se por objetivo dimensionar e avaliar um kit de irrigação por microtubos, alimentado...

  5. Contributos para a Gestão de Energia em Serviços de Águas

    OpenAIRE

    Boavida, Sara Maria Quaresma

    2016-01-01

    O nexo água-energia reveste-se de grande importância nos serviços de águas. A água é o seu core business e a energia é essencial às suas atividades. O crescente ritmo de urbanização, a escassez de água e a legislação mais exigente no tratamento de águas residuais fazem prever um aumento das necessidades energéticas das entidades gestoras. O aumento da fatura energética nas entidades gestoras compromete a sua sustentabilidade financeira e as emissões de gases de efeito de estufa decorrentes do...

  6. Níveis de energia líquida e ractopamina na qualidade da carne suína

    OpenAIRE

    Amin,Melissa; Kiefer,Charles; Feijó,Gelson Luís Dias; Gonçalves,Liliane Maria Piano; Souza,Karina Márcia Ribeiro de; Rodrigues,Gabriela Puhl

    2014-01-01

    Realizou-se este estudo com o objetivo de avaliar qualitativamente a carne de suínos alimentados com dietas contendo diferentes níveis de energia líquida e suplementadas com 10ppm de ractopamina. Foram utilizados 100 suínos, machos castrados, de alto potencial genético, com peso médio inicial de 73,62 ± 4,76kg e peso médio final de 97,31 ± 1,12kg. Os animais foram distribuidos em delineamento experimental de blocos ao acaso em esquema fatorial 5x2 (cinco níveis de energia líquida: 2.300; 2.42...

  7. INVESTIGAÇÃO EXPERIMENTAL DA GERAÇÃO DE ENERGIA ELÉTRICA SOLAR FOTOVOLTÁICA

    OpenAIRE

    Antonio Luiz P. S. Campos; Aécio Vinícius Amorim Farias; Leandro Alves de Farias; Valter Nogueira Pereira Júnior; Bruno Palhano da Costa; Idelcácio Paulino de Macedo

    2010-01-01

    Os painéis solares fotovoltaicos são dispositivos desenvolvidos para a geração de energia elétrica. Este trabalho aborda conceitos envolvidos na fabricação e funcionamento desses dispositivos tais como: histórico da energia solar fotovoltaica, tipos de painéis solares e aplicação de painéis solares em sistemas isolados. Foi feito um estudo de eficiência de geração elétrica de um painel solar existente no Campus Natal – Zona Norte do IFRN. Nesse estudo, foram levadas em consideração a incidênc...

  8. Obtenção do cermet Ni-ZrO2 por moagem de alta energia

    OpenAIRE

    Douglas Will Leite

    2010-01-01

    A obtenção do Cermet de níquel-zircônia via moagem de alta energia (Mechanical Alloying MA) foi estudado visando a preparação de anodos de células a combustível de óxido sólido (SOFC). O níquel metálico foi adicionado em três concentrações: 30, 40 e 50% em volume. As operações de moagem foram conduzidas em moinho vibratório de alta energia do tipo SPEX. Estudou-se a influência do tempo de moagem, a eficiência de aditivos para controle do processo, tipo e geometria dos potes de moagem. A infl...

  9. INVESTIGAÇÃO EXPERIMENTAL DA GERAÇÃO DE ENERGIA ELÉTRICA SOLAR FOTOVOLTÁICA

    Directory of Open Access Journals (Sweden)

    Antonio Luiz P. S. Campos

    2010-09-01

    Full Text Available Os painéis solares fotovoltaicos são dispositivos desenvolvidos para a geração de energia elétrica. Este trabalho aborda conceitos envolvidos na fabricação e funcionamento desses dispositivos tais como: histórico da energia solar fotovoltaica, tipos de painéis solares e aplicação de painéis solares em sistemas isolados. Foi feito um estudo de eficiência de geração elétrica de um painel solar existente no Campus Natal – Zona Norte do IFRN. Nesse estudo, foram levadas em consideração a incidência solar e a hora do dia. Por fim, são apresentadas conclusões sobre o estudo desenvolvido.

  10. Fundamentos del metodo cientifico

    Directory of Open Access Journals (Sweden)

    Badii, M. H.

    2004-01-01

    Full Text Available El objetivo de esta obra no radica en realizar una búsqueda exhaustiva de la literatura en el tema, sino, sentar las bases del método científico, notando los aspectos filosóficos e éticos de la ciencia. Se presentan los conceptos y definiciones fundamentales relacionados con la metodología de la investigación científica. Se maneja el concepto de la toma de los datos válidos como un requisito básico en cualquier trabajo científico. Se pone a disposición del lector un modelo denominado el ECOEE que es una herramienta poderosa para establecer puntos de comparación e discusión entre los resultados de diferentes trabajos científicos. Finalmente, ofrece unas sugerencias de que hacer o no hacer en cuanto a realizar un trabajo de investigación.

  11. First discussion for fostering the photovoltaic energy in Mexico; Primer coloquio para el fomento de la energia fotovoltaica en Mexico

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-06-15

    The varied spheres (political, environmental, economic, scientific and social) day by day are looking for the key issues, which are going to make them to preserve or disappear either in the present or in the future. Therefore, it was carried out the first conversation in the State of Zacatecas, Mexico. Here there were shown different advances related to the renewable energies by those spheres. Generally speaking, it was in this event where there were gather together private and government organs in order to present every issue related to the use and to the promotion of the renewable energies. By these means, it was probed that the renewable energies are: the current market, the groundbreaking technology, the best option friendly-environment, the panacea for the society and for the improvement of the economy of many countries both developing countries and developed countries. The renewable energy topic is seen from different point of views. [Spanish] Las diferentes esferas que rigen el dia a dia; es decir, la politica, el medio ambiente, la economia, las ciencias y la sociedad, siempre estan en busca de cuestiones que las hagan crecer y evolucionar para asi seguir ocupando un espacio no solo en el presente sino tambien en el futuro. En esta ocasion fue en el primer coloquio, realizado en el Estado de Zacatecas, Mexico, donde dichas esferas se reunieron con el fin de mostrar sus diversos avances acerca de las energias fotovoltaicas. En otras palabras, fue en este coloquio donde se reunieron organos privados y gubernamentales con el fin de mostrar todo lo relacionado con el uso y la promocion de las energias renovables. Comprobando que las energias renovables son tanto: el mercado de hoy, la tecnologia de punta, la mejor opcion ambiental, la panacea para la sociedad y para la mejora de la economia de muchos paises en vias de desarrollo y de primer mundo. En estas ponencias no solo se habla de las energias renovables desde un aspecto cientifico, sino tambien financiero

  12. Estudo comparativo de sistemas de iluminação artificial considerando luz natural e consumo de energia

    Directory of Open Access Journals (Sweden)

    Letícia Niero Moraes

    Full Text Available Além do aproveitamento da iluminação natural, indicado como um fator primordial na economia de energia das edificações, o posicionamento das luminárias bem como de suas especificações pode contribuir para o conforto ambiental e a conservação de energia. Essas preocupações, no entanto, não fazem parte da prática atualmente estabelecida pelos profissionais de iluminação. Considerando essa lacuna, o presente trabalho visa desenvolver um estudo que aborda a avaliação de diferentes sistemas de iluminação artificial. A metodologia da pesquisa é baseada na avaliação do desempenho luminoso, como uniformidade, níveis e distribuição de iluminâncias, e consumo de energia de sistemas de iluminação artificial, através de simulação computacional. As análises de aproveitamento da luz natural foram utilizadas para uma estimativa simplificada do consumo energético para diferentes sistemas de iluminação artificial, através da divisão de circuitos de acionamento. Os sistemas de iluminação artificial propostos eram diferenciados pelas fotometrias e disposições das luminárias. Os resultados mostram diferenças significativas quanto à distribuição da iluminação, assim como no consumo de energia, chegando a economias de até 46% em relação ao projeto-base. As principais contribuições deste estudo são a obtenção de critérios que conduzam a um melhor dimensionamento do sistema de iluminação artificial.

  13. Actions done by SAGARPA to foster renewable energies; Acciones realizadas por la SAGARPA para el fomento de las energias renovables

    Energy Technology Data Exchange (ETDEWEB)

    Diez de Sollano Elcoro, Rodrigo [Fideicomiso de riesgo compartido, Mexico (Mexico)

    2007-06-15

    This presentation is mainly focused on all the projects carried out in order to boost renewable energies. Such projects have not only good results for the environmental sphere but also for the economic one. In the first part, there are found the general targets, which are going to foster the use of these sort of energies. Then, there are shown different kinds of photovoltaic systems. The implementation of these systems have a double target: to improve both activities: stock breeding and agriculture, and to foster the use of renewable energy. Next, there are mentioned the project investors. Similarly, there are described some of the components that are part of such projects along with their corresponding results. Finally, it is given a succinctly explanation about the conclusions as well as the future plans. [Spanish] Esta presentacion principalmente se enfoca en todos los proyectos que se han realizado para el fomento de las energias renovables, teniendo un impacto no solo ambiental sino tambien economico. En la primera parte, se encuentran los objetivos generales que se tienen para fomentar el uso de este tipo de energia. Enseguida, se muestran los diferentes sistemas basados en el uso de energia renovable. La implementacion de estos sistemas tiene un doble objetivo: mejorar de alguna manera la actividad de la ganaderia o de la agricultura, y fomentar el uso de energias renovables. Enseguida, se mencionan los inversionistas que participaron en la realizacion de los proyectos; asimismo, se describen algunos de los elementos, que forman parte de los proyectos, acompanados de sus respectivos resultados obtenidos. Finalmente, se da una breve explicacion de las conclusiones a las que se llegaron, asi como de los planes a futuro.

  14. Renewable energies. 25 years of UNAM in Temixco; Energias renovables. 25 anos de la UNAM en Temixco

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-07-01

    At the Universidad Nacional Autonoma de Mexico (UNAM), the research in renewable energy began since the decade of 70's. In 1985 the Laboratory of Solar Energy (LES) of the Institute for Research in Materials in Temixco, Morelos was inaugurated, and in 1996 this became the Energy Research Center (CIE) of the UNAM. Currently, CIE is the only research center of the UNAM devoted mainly to the study and development of applications of renewable energies in Mexico. In its 25 years of existence, the LES-CIE has shown to be a university entity with a high academic performance: both in the scientific and technological production, as in the formation of high quality human resources, its outreach activities and more recently with the linkage. This commemorative book for the 25 years was made with the intention of leaving constancy of the origins and evolution of what today is done in this University Research Center. [Spanish] En la Universidad Nacional Autonoma de Mexico (UNAM), se iniciaron las investigaciones en energias renovables desde la decada de los anos 70's. En 1985 se inaugura el Laboratorio de Energia Solar (LES) del Instituto de Investigaciones en Materiales en Temixco, Morelos y en 1996 este se transforma en el Centro de Investigacion en Energia (CIE) de la UNAM. Actualmente, el CIE es el unico centro de investigacion de la UNAM dedicado principalmente al estudio y desarrollo de aplicaciones de las energias renovables en Mexico. En sus 25 anos de existencia, el LES-CIE ha mostrado ser una entidad universitaria con un alto rendimiento academico: tanto en la produccion cientifica y tecnologica, como en la formacion de recursos humanos de alta calidad, sus actividades de difusion y mas recientemente con la vinculacion. Este libro conmemorativo por los 25 anos se realizo con el proposito de dejar constancia de los origenes, evolucion y de lo que hoy es y se hace en este Centro Universitario de Investigacion.

  15. COMPARAÇÃO DA CAPACIDADE PREDITIVA DE MODELOS ARIMA PARA O CONSUMO DE ENERGIA ELÉTRICA NO BRASIL

    Directory of Open Access Journals (Sweden)

    Raphael Silveira Amaro

    2017-07-01

    Full Text Available Devido ao fato de que a energia elétrica, em grandes quantidades, não pode ser armazenada de forma viável e eficiente, torna-se extremamente importante mensurar de forma precisa e confiável a sua demanda futura. Deste modo, o objetivo desta pesquisa é comparar a capacidade preditiva de modelos Autoregressive Integrated Moving Average para a série de demanda de energia elétrica de médio prazo do Brasil. Para que tal objetivo seja alcançado, realizam-se previsões da demanda de energia elétrica mensal para 50 passos à frente, em cada modelo concorrente, com reajuste dos parâmetros a cada passo. Como resultado, as evidências empíricas encontradas demonstraram que o melhor modelo para realizar previsões eficientes e confiáveis para a série é um processo com dois vetores autorregressivos, um vetor de média móvel e ordem de integração unitária.

  16. Energia nuclear em um cenário de trinta anos Nuclear energy over a 30-year scenario

    Directory of Open Access Journals (Sweden)

    Carlos Feu Alvim

    2007-04-01

    Full Text Available A perspectiva da Energia Nuclear no Brasil é analisada sob os aspectos demanda, custos, ambiental, tecnológico e estratégico. A demanda energética projetada, mesmo para crescimentos abaixo dos desejados e considerando algum esforço de redução da intensidade energética, mostra a necessidade de adicionar energia térmica à geração elétrica, hoje predominantemente hídrica. A energia nuclear deve ter participação nessa geração por motivos econômicos, ambientais, tecnológicos e estratégicos.The perspectives of nuclear energy in Brazil is analyzed regarding demand, costs, environmental, technological and strategic aspects. The projected energy demand, even for a growth rate below the desired one and considering some efforts relative to energy intensity reduction, shows the need of adding thermal energy to electricity generation, now predominantly hydraulic. Nuclear energy should have a share in this generation due to economical, environmental, technological and strategic reasons.

  17. Energy management system. Opti-dmaX Control; Sistema de administracion de energia. Control Opti-dmaX

    Energy Technology Data Exchange (ETDEWEB)

    Automatizacion, Productividad y Calidad S.A. de C.V. Puebla (Mexico)

    2005-07-01

    The electrical energy is an essential element in the activities of the present world. Optimizing its consumption represents a competitive advantage for the companies, since the operation costs would be reduced as well as the negative impact to the environment. In billing the electrical energy the tariffs consider: the consumption, the demand, the power and the schedule of use for the medium and large companies. With the Opti-dmaX system the necessary information for the correct administration of the electrical energy consumption is obtained from the measurement in the strategic points of the installation. At the same time, the processes and services are controlled, maintaining an efficient power operation that diminishes operative costs. [Spanish] La energia electrica es un elemento indispensable en las actividades del mundo actual, y optimizar su consumo, representa una ventaja competitiva para las empresas, ya que se consigue reducir los costos de operacion y el impacto al ambiente. En la facturacion de la energia electrica las tarifas consideran: el consumo, la demanda, la potencia y el horario de uso para las medianas y grandes empresas. Con el sistema Opti-dmaX se obtiene la informacion necesaria para la correcta administracion del consumo de energia electrica a partir de la medicion en los puntos estrategicos de la instalacion. A su vez, se controlan los procesos y servicios, manteniendo una operacion energetica eficiente que minimiza los costos operativos.

  18. Competitive policies in the Nordic energy research and innovation area - eNERGIA : Part 2: Technology reports

    Energy Technology Data Exchange (ETDEWEB)

    Klitkou, Antje; Pedersen, Trond Einar; Scordato, Lisa; Mariussen, Aage

    2008-07-01

    This (Part 2: Technology reports) is the second report about the results from the eNERGIA project. The first report deals with the countries covered by the eNERGIA project, while the third report sums up the SWOT-analysis, the eNERGIA workshops and the case studies of good practice. A short synthesis report summarises the entire project. This second report mainly deals with selected renewable energy technologies from different perspectives. The report comprises the following nine chapters. Chapter 1 is the presentation of the selected renewable technologies (solar photovoltaic technology, wind technology, 2nd generation bio-energy technology, wave technology and hydroelectric technology) and a subsequent elaboration of the status of the technologies in the Nordic and Baltic countries. Chapter 2 gives an overview of patterns of international R&D collaboration as seen from the countries in question. Chapter 3 draws on technology specific patenting data and bibliometric data, describing the level of technology specific activity in each country. Chapter 4 and 5 describe the status of renewable energy production and renewable energy research respectively in each country. The four last chapters are relatively brief descriptions of the situation in the Nordic and Baltic countries. Chapter 6 gives an overview of the venture capital situation. Chapter 7 is about market regulations and Chapter 8 is about social concerns. Finally, Chapter 9 addresses infrastructural challenges. (Author) 77 figs., 70 tabs

  19. Exigências nutricionais de zebuínos: energia Nutritional requirements of zebu cattle: energy

    Directory of Open Access Journals (Sweden)

    Pedro Veiga Rodrigues Paulino

    2004-06-01

    Full Text Available Com o objetivo de determinar as exigências de energia e as eficiências de utilização da energia metabolizável para ganho de peso e mantença de zebuínos, foi desenvolvido um experimento envolvendo 19 novilhos anelorados, com peso vivo médio inicial de 270 kg. Quatro animais foram abatidos ao início do experimento, para servirem de referência para estudos posteriores, três foram alimentados ao nível de mantença e os 12 restantes foram alocados em delineamento inteiramente casualizado, com três tratamentos: 5, 35 e 65% de concentrado na base da matéria seca total. O volumoso foi constituído de pré-secado de capim-braquiária (Brachiaria brizantha e de capim-tifton 85 (Cynodon sp.. As dietas foram isonitrogenadas e os animais foram alimentados ad libitum. A exigência líquida de energia para mantença (ELm foi estimada como o anti-log do intercepto da equação obtida pela regressão linear entre o logaritmo da produção de calor (PC e o consumo de energia metabolizável (CEM, bem como pelo coeficiente "a" da equação de regressão exponencial entre a PC e o CEM dos animais do tratamento com 35% de concentrado e os do grupo mantença. As quantidades de energia e gordura no ganho elevaram-se com o aumento do peso vivo (PV dos animais. O teste de identidade dos modelos de regressão demonstrou não haver diferenças entre os tratamentos. O requisito energético diário para mantença foi de 68,60 kcal/PV0,75. A k m estimada foi de 0,66 e as k g calculadas foram de 0,26; 0,41 e 0,46, respectivamente, para concentrações de EM de 2,31; 2,47 e 2,62 Mcal/kg de MS, correspondentes aos teores de 5, 35 e 65% de concentrado na dieta. Os requisitos diários de EM e NDT para mantença de um animal de 400 kg de PV foram de 9,30 Mcal e 2,57 kg, respectivamente.A trial involving nineteen zebu steers with initial live weight of 270 kg were conducted with the objective of determining their energy requirements and the efficiency of utilization of

  20. Análise da comercialização de energia elétrica cogerada pelo setor sucroalcooleiro no estado de São Paulo

    Directory of Open Access Journals (Sweden)

    Marilda da Penha Teixeira Nagaoka

    2003-01-01

    Full Text Available O Brasil viveu, em 2001, uma crise de oferta de energia elétrica sem precedentes que coincidiu com o processo de reestruturação do setor elétrico brasileiro e possibilitou aos autoprodutores de energia elétrica,como o setor sucroalcooleiro, comercializarem o excedente de energia, obtidos pelo processo de cogeração, que apesar do elevado potencial de comercialização, não está sendo devidamente aproveitado. Este trabalho teve por objetivo caracterizar o mercado de energia elétrica cogerada e analisar os obstáculos à comercialização da energia cogerada, à luz da existência dos custos de transação e econômicos, enfrentados pelo setor sucroalcooleiro e distribuidoras. Para a coleta de informações, foram realizadas entrevistas semi-estruturadas com o responsável pela área de cogeração das usinas e distribuidora de energia, que consistiam em perguntas pré-determinadas que foram lidas na mesma ordem e da mesma maneira para todos os entrevistados para assegurar a comparabilidade dos resultados. As entrevistas foram gravadas, transcritas e examinadas por meio da análise de conteúdo. Os resultados indicaram que poderiam ser estabelecidos contratos de longo prazo, mas os custos de transação e econômicos entre os agentes podem estar superando os benefícios da comercialização de energia elétrica cogerada, fazendo os agentes atuarem preferencialmente no mercado spot

  1. Ultra-high-speed oscillographic techniques; Techniques d'oscillographie ultra-rapide; Metody sverkhskorostnoj ostsillografii; Metodos oscilograficos ultrarrapidos

    Energy Technology Data Exchange (ETDEWEB)

    Abercrombie, S; Elphick, B; Foster, H [Atomic Weapons Research Establishment, Aldermaston (United Kingdom)

    1962-04-15

    100 {Omega}; e) Des resistances de complement a large bande, destinees a l'extraction des signaux de declenchement de la base de temps; / ) Des bases de temps fournissant des signaux de l'ordre de quelques nanosecondes et comportant des dispositifs de declenchement et de suppression du faisceau; g) Un appareil de prise de vues a grande ouverture. En conclusion, le memoire examine certaines applications de l'electronique nucleaire. (author) [Spanish] Despues de un resumen historico de los metodos de utilizacion de oscilografos para senales transitorias de alta velocidad, los autores examinan sus limites de aplicacion practica. En la memoria se pasa revista a los tubos de rayos catodicos apropiados para estos oscilografos, tomando en cuenta especialmente los tipos de deflexion por onda progresiva. En la memoria se estudian los siguientes componentes de un oscilografo completo para senales transitorias: a) Un tubo de rayos catodicos con deflexion por onda progresiva con conexion coaxial balanceada y una anchura de banda de 2 GHz; b) Un transformador inversor de fase con una impedancia caracteristica de 100 y 50 {Omega} y una anchura de banda de 1,5 kHz a 1,5 GHz; c) Resistencias de terminacion coaxial para frecuencias del orden de los GHz; d) Condensadores de acoplamiento compensados para usarlos en lineas coaxiales con frecuencias comprendidas entre 5 kHz y 3 GHz y 100 {Omega} de impedancia caracteristica; e) Atenuadores resistivos de banda ancha, para la extraccion de senales de disparo de base de tiempos; f) Bases de tiempo del orden de los nanosegundos, con dispositivos disparadores y supresores ; g) Una camara de gran apertura. Finalmente, los autores examinan las aplicaciones de estos oscilografos en la electronica nuclear. (author) [Russian] Posle kratkogo opisaniya ostsillograficheskogo metoda izucheniya sverkhskorostnykh perekhodnykh izluchenij obsuzhdayutsya prakticheskie vozmozhnosti ehtogo apparata. Daetsya obzor podkhodyashchikh katodnykh ehlektronnykh lamp

  2. Tendencies and perspectives of the residential energy in Mexico; 1. ed.; Tendencias y perspectivas de la energia residencial en Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Sheinbaum Pardo, Claudia [Instituto de Ingenieria, Mexico, D. F. (Mexico)

    1996-12-31

    production of electricity. In the fifth chapter the saving potential is presented and the conservation policies and energy efficiency of the of the OCED countries. The second part exposes the tendencies in the use of the residential energy in Mexico from 1980 to 1990 and analyzes and evaluates the possible applications of the experience of the OECD countries to the case of our country. This part is initiated in the sixth chapter and in it the tendencies of the use of residential energy in Mexico at aggregated level from 1970 to 1990 are studied and for end uses from 1980 to 1990, in this chapter is also included a calculation of the elasticities demand-price and demand income, and an aggregated analysis of the change indices. In the seventh chapter the associated emissions of the main polluting agents and green house gases associated to the use of residential energy in Mexico are presented. In the eighth chapter the conservation potential is analyzed and the necessary energy policies to achieve it. In the ninth chapter the conclusions and recommendations are presented.. Finally three appendices are presented: the first one shows the source of the data for the countries of the OECD, the second shows the procedure of auto regression and the third one the prices of the residential energy in Mexico and the present average and minimum wage. [Espanol] Este trabajo es un estudio comparativo del uso de la energia residencial en Mexico y nueve paises fundadores de la Organizacion para la Cooperacion y el Desarrollo Economico (OCDE). Su principal objetivo es conocer las causas de la tendencias en el uso de la energia residencial en dichos paises, sus efectos ambientales, el potencial tecnico de conservacion y las posibles politicas de ahorro y eficiencias energeticas. El trabajo se divide en dos partes: La primera parte presenta el analisis de las tendencias observadas durante el periodo de 1973 a 1990 asi como las perspectivas del uso de la energia residencial en Estados Unidos

  3. Greenhouse effect gases (GEI) by energy consumption; Gases efecto invernadero (GEI) por consumo de energia

    Energy Technology Data Exchange (ETDEWEB)

    Munoz Ledo C, Ramon; Bazan N, Gerardo [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2003-07-01

    carburos organicos volatiles que no son metano (NMVOC, por sus siglas en ingles) y son productos secundarios y nocivos que se obtienen de los procesos que convierten los combustibles en energia (combustion). Las principales fuentes de GEI son: fuentes fijas (industrias, residencias, comercios, servicios publicos y transformacion de energia, como la produccion de electricidad); fuentes moviles (que incluyen todo tipo de transporte que use combustible). Los combustibles que, por su volumen y eficiencia, generan mas emisiones de GEI son el petroleo crudo, gas natural y biomasa solida (lena - bagazo de cana). Cualquier esfuerzo por reducir estas emisiones es muy importante y notable si incide en estos combustibles.

  4. Non-Destructive Testing Methods Applied to Multi-Finned SAP Tubing for Nuclear-Fuel Elements; Essais Non Destructifs de Gaines a Ailettes, en Poudre d'Aluminium Frittee, pour Elements Combustibles; Nedestruktivnye metody ispytaniya rebristykh trub iz spechennogo alyuminikiog'o poroshka dlya yadernykh toplivnykh ehlementov; Metodos de Ensayo No Destructivo Aplicados a Tubos de SAP con Aletas Multiples Destinados a Elementos Combustibles

    Energy Technology Data Exchange (ETDEWEB)

    Lund, S. A. [Danish Central Welding Institution, Copenhagen (Denmark); Knudsen, P. [Danish Atomic Energy Commission, Research Establishment, Risoe (Denmark)

    1965-09-15

    Energia Atomica de Dinamarca ha emprendido el estudio de un reactor de potencia con refrigerante organico y moderador de agua pesada. Los correspondientes elementos combustibles consisten en haces de 19 barras formadas por pastillas de dioxido de uranio sinterizado, encerradas en tubos de producto de aluminio sinterizado (SAP), de 2 m de longitud, provistos de aletas helicoidales. Para obtener condiciones optimas de transmision de calor y mantener la integridad del elemento combustible durante el funcionamiento del reactor, es necesario contar con tubos de muy alta calidad. Se citan dos ejemplos que ponen de manifiesto las estrechas tolerancias dimensionales adoptadas. Para asegurar una calidad adecuada de los tubos, se establecio un control de calidad muy estricto, basado en gran medida en la aplicacion de metodos no destructivos. Se describen en esta memoria las tecnicas desarrolladas para medir el espesor de pared y los diametros, y para descubrir defectos. La compleja seccion transversal, con 24 aletas, impide aplicar metodos ultrasonicos o de comentes de Foucault para medir el espesor de la pared. Por consiguiente, se desarrollo un calibre registrador de rayos beta, cuyo funcionamiento se basa en la atenuacion sufrida por la radiacion beta proveniente de una fuente de {sup 90}Sr colocada en el interior del tubo. Para el registro continuo del espesor de la pared del tubo con seccion transversal mas simple, de 12 aletas, se utiliza un metodo ultrasonico de resonancia por inmersion. Los diametros interno y externo (entre puntos de aletas) se registran de manera continua mediante calibres neumaticos rapidos. Las fallas se detectan mediante la tecnica de eco de impulsos ultrasonicos, y examinando los tubos con corrientes de Foucault. El metodo ultrasonico permite descubrir facilmente las fisuras transversales, pero hasta ahora ha sido imposible utilizarlo para la deteccion de defectos longitudinales. Por consiguiente, ademas del ensayo ultrasonico, se aplica el examen con

  5. Data Evaluation Problems in the Pulsed Neutron Source Method; Problemes d'Evaluation des Donnees dans les Applications de la Methode de la Source Pulsee; Problemy otsenki dannykh pri primenenii metoda istochnika impul'snykh nejtronov; Problemas de Evaluacion de Datos en el Metodo de la Fuente de Neutrones Pulsados

    Energy Technology Data Exchange (ETDEWEB)

    Pal, L.; Bod, L.; Szatmary, Z. [Central Research Institute for Physics, Hungarian Academy of Sciences, Budapest (Hungary)

    1965-08-15

    muy importante determinar directamente el parametro caracteristico del fondo, partiendo de los datos de desin tegracion obtenidos empleando diversas demoras. Los parametros de difusion se calcularon con el metodo de los cuadrados minimos ponderados, empleando las constantes de desintegracion de desviacion tipo minima obtenidas segun la funcion de maxima probabilidad. Como no se conocian los valores del recorrido libre medio de transporte para los materiales investigados, se ideo un procedimiento de iteracion rapidamente convergente para determinarlo. Con la calculadora se pudieron determinar los coeficientes de orden B{sup 6} y los terminos superiores de la constante de desintegracion. Los parametros de difusion de los materiales hidrogenados investigados se calcularon con la formula de Radkowsky, partiendo de la variacion de las secciones eficaces integrales de dispersion en funcion de la energia. Los calculos demuestran que la formula de Radkowsky proporciona un metodo empirico muy util para evaluar el recorrido libre medio de transporte en gran numero de materiales hidrogenados. (author) [Russian] Dlja opredelenija diffuzionnyh parametrov teplovyh nejtronov uzhe bolee desjati let primenjaetsja impul'snyj metod. Jetot metod okazalsja ves'ma podhodjashhim dlja issledovanija gidrogennyh zamedlitelej. Soobshhajutsja rezul'taty izmerenij v vode, benzole, toluole, ksilon-ciklogeksane, n-geksane i difenile; obsuzhdajutsja metody, s po- moshh'ju kotoryh na osnovanii izmerennyh dannyh s naimen'shej pogreshnost'ju mozhno opre- delit' parametry diffuzii, predstavljajushhie interes. Vvidu togo, chto pri issledovanii zamedlitelej pri vysokih temperaturah vstrechajutsja zatrudnenija tehnicheskogo haraktera iz-za projavlenija vozdejstvija vremeni proleta, chto oka- zyvaet vlijanie na velichinu konstanty raspada, to jeto javlenie podrobno issleduetsja kak teoreticheski, tak i jeksperimental'no; ukazyvajutsja geometricheskie uslovija, dajushhie voz- mozhnost' obespechit

  6. Development of an analytic method for arsenic's determination in lime and tortilla; Desarrollo de un metodo analitico para determinacion de arsenico en cal y tortilla

    Energy Technology Data Exchange (ETDEWEB)

    Huato Soberanis, Julio; Ogura, Tetsuya [Universidad Autonoma de Guadalajara, Guadalajara, Jalisco (Mexico)

    1995-02-01

    A spectrophotometric method to determine As in tortilla and lime has been optimized, modifying the AsH{sub 3} generator. The reaction between arsin (AsH{sub 3}){sub 4} and diethyldithiocarbamate of Ag (AgDDC); was followed spectrophotometrically. The conditions under which the As remains in the ash during the calcination of the tortillas were studied. It was found that when they were heated in a quartz tube with a careful control of the air flow and oxygen, as well as the heating temperature, the arsenic loss in minimized. [Spanish] Se ha optimizado el metodo para determinar As en la tortilla y cal mediante espectrometria en el visible del color producido en la reaccion entre Arsina (AsH{sub 3}){sub 4} y dietilditiocarbamato de plata (AgDDC); modificando el generador de AsH{sub 3}. Se han buscado las condiciones en las que el arsenico permanece en las cenizas de la calcinacion de las tortillas; encontrandose que las tortillas deben calentarse en un tubo de cuarzo con control del flujo de aire y oxigeno asi como de la temperatura de calentamiento.

  7. Jüri Käo: Eesti Energia jääb isegi börsil poliitikute kontrolli alla / Jüri Käo ; intervjueerinud Sulev Vedler

    Index Scriptorium Estoniae

    Käo, Jüri, 1965-

    2010-01-01

    Eesti Energia nõukogu esimees ei poolda mitte Eesti Energia suuremahulist börsile viimist, vaid vähemusaktsiate börsil noteerimist. Tema sõnul on IPO suurim oht, et sellest saab poliitilise valimisvõitluse objekt ning unustatakse, et energeetikas tehakse otsuseid 30 ja 50 aasta perspektiivis

  8. Analysis of economic break-even point of the biogas utilization for electrical power conversion: case study in a swine terminated unit; Analise do ponto de equilibrio economico da utilizacao do biogas para conversao em energia eletrica: estudo de caso em unidade de terminacao de suinos

    Energy Technology Data Exchange (ETDEWEB)

    Cervi, Ricardo Ghantous; Pinotti, Elvio Brasil [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Registro, SP (Brazil). Fac. de Ciencias Agrarias do Vale do Ribeira], e-mails: rghantous@registro.unesp.br, epinotti@registro.unesp.br; Esperancini, Maura Seiko Tsutsui; Bueno, Osmar de Carvalho [Universidade Estadual Paulista Julio de Mesquita Filho (FCA/UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Gestao e Tecnologia Agroindustrial], e-mails: maura@fca.unesp.br, osmar@fca.unesp.br

    2010-07-01

    This work aimed to develop a study to estimate the break-even point in financial units of the electrical power generation using biogas from swine wastes. The analyzed biodigester is a continuous tubular model with brick concrete duct and plastic covering with a gasometer, and where the waste of 2,300 fattening pigs are deposited daily. The initial investment estimate for the installation was R$ 51,537.17. The system annual costs were R$ 5,708.20, for maintenance, R$ 4,390.40 for depreciation and R$ 1,366.77 for interests. It was noticed that with an average of consumption of 17.1 kW.hour{sup -1} the system presents an annual loss of R$ 1,592.14 because the consumption of 27.85 kW.hour{sup -1} is the minimum that should be consumed to achieve a corresponded financial break-even point of R$ 15,054.40.year{sup -1}. It was concluded that the correct technical dimensioning greatly influences on the economic results. (author)

  9. Technical evaluation of the reduction of energy consumption and electrical demand of active power on the campus of UFMT (Universidade Federal de Mato Grosso) after implantation of the energy efficiency project; Avaliacao tecnica da reducao do consumo de energia eletrica e demanda de potencia ativa no campus da UFMT apos implantacao do projeto de eficiencia energetica

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Teresa Irene Ribeiro de Carvalho Malheiro; Vasconcelos, Arnulfo Barroso de [Universidade Federal de Mato Grosso (NIEPE/UFMT), Cuiaba, MT (Brazil). Nucleo Interdisciplinar de Estudos de Planejamento Energetico; Ochiuto, Milton de Souza; Bernardes, Thiago Alves [Centrais Eletricas Matogrossenses (CEMAT), Cuiaba, MT (Brazil); Barros, Regiane Silva de [Universidade Federal de Mato Grosso (UFMT), Cuiaba, MT (Brazil)

    2008-07-01

    Since the energy crisis of 2001, measures that promote rational use of energy have been adopted by the Brazilian population. Either by industries that developed more efficient equipment, or by consumers, inclined in acquiring these equipment and adopting rational energy use measures, or by the government, that established a series of measures stimulating the energy efficiency. This work will go to illustrate some of these measures, as the implantation of STAMP PROCEL, that aims to indicate to the consumer which equipment achieve greater efficiency in each category. And law number 9,991, of July 24 2000, that regulates research and development investments in energy efficiency by electric sector companies. Finally, the result of the implantation of a energy efficiency project in a public agency will be shown, illustrating the impacts that the development of these projects bring to society as a whole. (author)

  10. PROCEL`s, the Brazilian electric power holding company conservation program, revitalization process and electric power conservation achievements in the 2015 plan; O processo de revitalizacao do PROCEL e o alcance das metas de conservacao de energia eletrica no plano 2015

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Mario Fernando M.; Pimentel Filho, Geraldo; Costa Pinhel, Antonio Carlos da [ELETROBRAS, Rio de Janeiro, RJ (Brazil). PROCEL

    1995-12-31

    The expected increasing of electric power consumption in Brazil from 1995 to 2005 will require investments in the electric power supply expansion of about US$170 billions. In case electric power conservation procedures may be effectively adopted, there might be a reduction in these investments up to US$34 billions. This work discusses how the revitalization of PROCEL, the Brazilian program of electric power conservation, is being conducted in order to achieve such objective 1 fig., 2 tabs., 4 refs.

  11. Income generation in the supply chain of acai in the design of electric energy supply in isolated communities in the municipality of Manacapuru, AM; Geracao de renda na cadeia produtiva do acai em projeto de abastecimento de energia eletrica em comunidades isoladas no Municipio de Manacapuru-AM

    Energy Technology Data Exchange (ETDEWEB)

    Bacellar, Atlas A; Souza, Rubem C.R.; Xavier, Diogo J.C.; Seye, Omar; Bacellar, Atlas A; Santos, Eyde C.S.; Freitas, Katriana T. [Universidade Federal do Amazonas (CDEAM/UFAM), Manaus, AM (Brazil). Centro de Desenvolvimento Energetico Amazonico], Email: abacellar@ufam.edu.br

    2006-07-01

    Efforts endeavored by the State aiming to universalize the electricity use in Brazil, PRODEEM and Programa Luz Para Todos are examples of it, had have as result high insolvency or interruption. The aim of this work is to analyze the potentialities of increasing incomes in communities at the city of Manacapuru - AM, assisted by the research project 'Model of electric power Businesses in Isolated Communities at the Amazon region'- NERAM, under the responsibility of CDEAM of Federal University of Amazonas - UFAM, starting from acai supply chain. The strategy is to implement an industry of acai's pulps with the objectives of adding value to the fruit and to use the pits as biomass to generate power. Cooperative as a legal model of enterprise was adopted in order to be responsible for the industry with the participation of the families that work with the fruit and the community in general. The cooperative plant idealized was based on the report of a socioeconomic research applied at the communities. Three methods were used to analyze the investment: Uniform Annual Value Equivalent, Liquid Present Value and Ratio of Internal Return. The results demonstrated the enterprise's viability since obeying the following premises: 50 tons of minimum production of acai per month; R$ 2.50 as a minimum pulp's sale price; and 0.60 kg of pulp for 1 kg of fruit as minimum productivity, which will create nine new puts of work, warranty of acai's fruit sale, income's increasing for the cooperative and incentive to catch the fruit. (author)

  12. Comparative analysis of photovoltaic electric power storage systems by using batteries and hydrogen, at remote communities of the Amazon region; Analise comparativa de sistemas de armazenamento de energia eletrica fotovoltaica por meio de baterias e hidrogenio, em localidades isoladas da regiao Amazonica

    Energy Technology Data Exchange (ETDEWEB)

    Furlan, Andre Luis [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Faculdade de Engenharia Mecanica; Neves Junior, Newton Pimenta [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Inst. de Fisica Gleb Wataghin. Lab. de Hidrogenio]. E-mail: andrelf@fem.unicamp.br

    2008-07-01

    In this work, comparative analyses of photovoltaic power storage were made, first by the traditional means employing lead-acid batteries, and second by means of electrolytic hydrogen which was later reconverted to power in a fuel cell. In order to design the two systems, it was used a load profile of the communities in Amazon region and by means of a mathematical model, implemented in a spreadsheet, that considers the several devices and their efficiencies in order to make it possible to specify the system components. The results were employed to evaluate the economic viability of the two systems in remote communities. Considering the present conditions, it was verified that the battery system is slightly advantageous. However, it was also observed that a minor cost reduction of the electrolizers/buffer/fuel cell would make the hydrogen system very competitive, becoming the best option for photovoltaic power storage. (author)

  13. Income generation in the supply chain of acai in the design of electric energy supply in isolated communities in the municipality of Manacapuru, AM; Geracao de renda na cadeia produtiva do acai em projeto de abastecimento de energia eletrica em comunidades isoladas no Municipio de Manacapuru-AM

    Energy Technology Data Exchange (ETDEWEB)

    Bacellar, Atlas A.; Souza, Rubem C.R.; Xavier, Diogo J.C.; Seye, Omar; Bacellar, Atlas A.; Santos, Eyde C.S.; Freitas, Katriana T. [Universidade Federal do Amazonas (CDEAM/UFAM), Manaus, AM (Brazil). Centro de Desenvolvimento Energetico Amazonico], Email: abacellar@ufam.edu.br

    2006-07-01

    Efforts endeavored by the State aiming to universalize the electricity use in Brazil, PRODEEM and Programa Luz Para Todos are examples of it, had have as result high insolvency or interruption. The aim of this work is to analyze the potentialities of increasing incomes in communities at the city of Manacapuru - AM, assisted by the research project 'Model of electric power Businesses in Isolated Communities at the Amazon region'- NERAM, under the responsibility of CDEAM of Federal University of Amazonas - UFAM, starting from acai supply chain. The strategy is to implement an industry of acai's pulps with the objectives of adding value to the fruit and to use the pits as biomass to generate power. Cooperative as a legal model of enterprise was adopted in order to be responsible for the industry with the participation of the families that work with the fruit and the community in general. The cooperative plant idealized was based on the report of a socioeconomic research applied at the communities. Three methods were used to analyze the investment: Uniform Annual Value Equivalent, Liquid Present Value and Ratio of Internal Return. The results demonstrated the enterprise's viability since obeying the following premises: 50 tons of minimum production of acai per month; R$ 2.50 as a minimum pulp's sale price; and 0.60 kg of pulp for 1 kg of fruit as minimum productivity, which will create nine new puts of work, warranty of acai's fruit sale, income's increasing for the cooperative and incentive to catch the fruit. (author)

  14. The babassu oil as an alternative source for renewable generation of electric power in isolated systems: a case study of the extractive reserve RESEX do Rio Ouro Preto - RO, Brazil; A babacu como fonte alternativa renovavel para a geracao de energia eletrica em sistemas isolados: um estudo de caso da RESEX do Rio Ouro Preto - RO

    Energy Technology Data Exchange (ETDEWEB)

    Aguiar, Sandra da Cruz Garcia do Espirito Santo [Universidade Federal de Rondonia (UNIR), Porto Velho, RO (Brazil). Dept. de Administracao; Militao, Julio Sancho Linhares Teixeira [Universidade Federal de Rondonia (UNIR), Porto Velho, RO (Brazil). Dept. de Quimica

    2008-07-01

    This text presents babacu as energy font (heat, fuel, power) for isolated regions and not taken care of by the linked system, and promote the economics social advantages for the region where if it installs. It presents the result of the quantitative survey of the area of forest of babassu palms is necessary for each family of form to keep functioning annually the mini central of supply of electric energy that will take care of the inhabitants of some communities of the Extractive Reserve Rio Ouro Preto, in the Rondonia State. It presents, still, the initial demand of the load to be supplied by the mini central, as well as the vegetal oil necessity for the attendance of this demand. (author)

  15. The processing of the acai in a project 'Model for Electric Power Enterprise in Isolated Communities in the Amazon' - NERAM; O beneficiamento do acai no projeto Modelo de Negocio de Energia Eletrica em Comunidades Isoladas na Amazonia - NERAM

    Energy Technology Data Exchange (ETDEWEB)

    Xavier, Diogo J.C.; Souza, Rubem C.R.; Seye, Omar; Bacellar, Atlas A.; Santos, Eyde C.S.; Freitas, Katriana T.; Rodrigues, Monica; Morais, Marcia R.; Guimaraes, Euler L. [Universidade Federal do Amazonas (CDEAM/UFAM), Manaus, AM (Brazil). Centro de Desenvolvimento Energetico Amazonico], Emails: diogo_am@yahoo.com.br, cdeam@ufam.edu.br

    2006-07-01

    This article presents a discussion on the productive processes associated with the acai within the project 'Model for Electric Power Enterprise in Isolated Communities in the Amazon - NERAM', financed by the National Council for Scientific and Technological Development - CNPq. With the premise of global use of the fruit of the acai trees, all the stages of the processing are described. These stages comprise the extraction of the pulp, treatment of residues, drying of the acai seeds, and it use for power generation. Estimates of the proportions are described in mass of the fruit involved in the stages of the processes, from the pulp extraction till the final products, and characteristics of the generation equipment. (author)

  16. Water-to-water heat pump operating with biogas for heating and cooling on dairy farms in order to rationalize the use of electric energy; Bomba de calor agua-agua acionada a biogas para aquecimento e resfriamento em fazendas leiteiras visando a racionalizacao no uso da energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Jordan, Rodrigo Aparecido; Cortez, Luis Augusto Barbosa; Pacco, Honorato Ccali [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Fac. de Engenharia Agricola. Dept. de Construcoes Rurais], e-mail: jordan@agr.unicamp.br, e-mail: cortez@reitoria.unicamp.br, e-mail: honorato.pacco@agr.unicamp.br; Baldassin Junior, Ricardo [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Fac. de Engenharia Mecanica], e-mail: baldassin@fem.unicamp.br; Neves Filho, Lincoln de Carvalho [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Fac. de Engenharia de Alimentos. Dept. de Engenharia de Alimentos], e-mail: neves-lin@fea.unicamp.br; Lucas Junior, Jorge de [Universidade Estadual Paulista (UNESP), Jaboticabal, SP (Brazil). Fac. de Ciencias Agrarias e Veterinarias. Dept. de Engenharia Rural], e-mail: jlucas@fcav.unesp.br

    2004-07-01

    This work presents some preliminary results for the development of a water-to-water heat pump used dairy farms for simultaneous milk cooling and water heating. The general idea in this project is to eliminate the electric heater and use the heating effect, usually wasted, in existing refrigeration systems. In this project it was also studied the use of the dairy cows for biogas production. The generated biogas is to be used to fuel an Otto engine which will power in substitution of the electric energy. Usually, dairy farms, electric energy is intensely used in the generation of thermal energy for milk cooling to extend its shelf life, and water heating used in the pasteurization, cleaning and equipment disinfection and working rooms. The direct use of electric energy results in high energy costs representing a major concern nowadays in Brazil. Therefore, it is expected with this work, to develop an equipment that con-tributes to the most efficient use of the energy and also, to look for a more efficient use of energy in dairy farms, increasing its self-sufficiency, with the production and use of the biogas to meet all thermal energy requirements. The results here obtained show an economic viability for use of the proposed equipment. (author)

  17. The social cost of electrical energy and its impact in a national economic development under an electrical system in permanent expansion; O Custo social da energia eletrica e seus impactos no desenvolvimento economico nacional sob um sistema eletrico em permanente expansao

    Energy Technology Data Exchange (ETDEWEB)

    Miranda, Vinicius de Holanda [Centrais Eletricas Brasileiras (ELETROBRAS), Rio de Janeiro, RJ (Brazil)

    2010-07-01

    Traditionally, prices for a product or service are defined through the market, according to classical economic theories, on the assumption that there is freedom of choice by the agents involved. If the product is not essential, prices higher than consumer's willingness to pay will lead them to reduce consumption, so that, for consumption to grow again, the prices have to fall. This is a cyclical behavior that tends to oscillate around an average price of balance, and goods which have this behavior are, therefore, called elastic with respect to price. When the good or service is essential, it's said that there is a 'market failure', considering that his appropriation incur price fixing by the agent who operates, sells or is in the condition of 'natural monopoly' (for interconnected electric grids of transmission and distribution), because, although consumers could theoretically reduce its consumption as a response to rising prices, as it depends on even the good (which is essential for most activities) and even who provides it (since he has no freedom of choice), the reduction of the level of consumption is conditioned to specific circumstances, in particular the power consumption associated with residential buildings of occasional occupation or industrial consumption, which depends on the levels of seasonal production. In this case, unlike the non-essential goods, it's said to be an inelasticity of demand in relation to price, which impacts are discussed in the present paper. (author)

  18. Analysis of rationality and efficiency of electricity utilization in posture poultry companies by computation platform based in fuzzy system; Analise da racionalidade e eficiencia da utilizacao de energia eletrica em empresas de avicultura de postura via plataforma computacional baseada em sistema fuzzy

    Energy Technology Data Exchange (ETDEWEB)

    Cremasco, Camila Pires [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Dept. de Bioestatistica; Faculdade de Tecnologia (FATEC), Presidente Prudente, SP (Brazil); Gabriel Filho, Luis Roberto Almeida [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Tupa, SP (Brazil). Fac. de Ciencias Agronomicas; Viais Neto, Daniel dos Santos; Bordin, Deyver [Faculdade de Tecnologia (FATEC), Presidente Prudente, SP (Brazil); Silva, Helenice de Oliveira Florentino [Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Botucatu, SP (Brazil). Dept. de Bioestatistica], E-mails: gabrielfilho@tupa.unesp.br., dvneto@fatecpp.edu.br, bordin@yahoo.com.br, helenice@ibb.unesp.br

    2012-11-01

    A great application of intelligent systems is in control of the electric power consumption of enterprises. For the assessment of the way that the company uses the electricity there are two indices which are called load factor and power factor. To facilitate the assessment of the performance of electric power consumption by the companies it is interesting that there is a single index indicating globally as energy is being used by the same. The goal of this work was to develop a software to assist laying poultry companies in the region of Bastos in more rational and efficient use of electric energy. For this, a system has been developed called Fuzzy Energy integrated environment developed with Delphi 2010. For the determination of fuzzy factor (situation of the company), we used a fuzzy system prepared in advance. The data collected over a period of 3 years helped the system programming. The software was able to present the situation of the company studied in a manner accessible to the user, and their results were tested accuracy 100 according to fuzzy system. With the inference method of Mandani, unable to create a general simulation of all relevant points of enterprise data. (author)

  19. Preliminary analysis for implementation of a hybrid solar-wind system with storage of electrical energy generated through electrolytic hydrogen and fuel cells; Analise preliminar para implementacao de um sistema hibrido solar-eolico com armazenamento da energia eletrica gerada atraves de hidrogenio eletrolitico e celula a combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Daniel Gabriel; Furlan, Andre Luis; Lopes, Davi Gabriel [Universidade Estadual de Campinas (FEM/UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica], e-mail: danielg@fem.unicamp.br; Silva, Ennio Peres; Apolinario, Fernando Resende [Universidade Estadual de Campinas (IFGW/UNICAMP), SP (Brazil). Inst. de Fisica Gleb Wataghin. Lab. de Hidrogenio; Silva, Maria Eugenia Vieira da; Rocha, Paulo Alexandre Costa [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Engenharia Mecanica e de Producao; Codeceira Neto, Alcides [Companhia Hidro Eletrica do Sao Francisco (CHESF), Recife, PE (Brazil)

    2008-07-01

    Due to relevance of the study and applicability of hybrid electric power generation from solar photovoltaic and wind power in Brazil, the present paper aims to introduce briefly the importance of technical and economic comparison of two electrical energy storage technologies (batteries versus H2 + fuel cell) and also to indicate the previous difficulties related to this possible application. In this context, it was intended a partnership between State University of Campinas - UNICAMP, the Federal University of Ceara - UFC and Hydro Electric Company of the Sao Francisco - CHESF in the meaning of makes viable an implementation. (author)

  20. Economic and market feasibility analysis, by the point of view of gas and electrical companies, for replacement of the electric powered showers by the natural gas powered showers in ABC Paulista area; Analise da viabilidade economica e do mercado, do ponto de vista das concessionarias de gas e de energia eletrica, pela substituicao de chuveiros eletricos por gas natural, na area do ABC paulista

    Energy Technology Data Exchange (ETDEWEB)

    Callari, Roberto [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil); Rosim, Sidney Olivieri [Rosim e Papaleo Consultoria e Participacoes Ltda. (Brazil)

    2008-07-01

    The possibility of an exchange of energy for heating residential water should be seen, by the point of view of the concessionaires, as a single market and exclusionary, in which the development of new customers by the concessionaire of electric energy directly involves the development of these non-customers for the distributor of natural gas. The study shows that, under the terms of concession of electricity, the loss of any part of the markets, current and expansion would be attractive only if the natural gas concessionaire could pass part of their earnings with customers users of electric showers that change their profile to the gas heaters, for electrical distribution. Under the terms of the concession to natural gas, the condition of massive investments replacement of electric showers and absorption of growth and expansion entrant with customers, increase the turnover to allow the search of a mechanism for transferring part of that revenue to absorb also customers of electricity. Thus, both the concessionaire of electricity preserve their revenue and, in turn, the concessionaire of natural gas would have an effective gain of revenue for the absorption of the customers of electric showers. (author.

  1. Management of the use of electric power in a university restaurant using fuzzy logic: analysis of the composition of this inputs in meal costs; Gerenciamento do uso da energia eletrica em um restaurante universitario utilizando a logica difusa: analise da composicao deste insumo nos custos da refeicao

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, Humberto de Avila; Guimaraes Junior, Sebastiao Camargo; Camacho, Jose Roberto; Salerno, Carlos Henrique [Universidade Federal de Uberlandia (UFU), MG (Brazil). Fac. de Engenharia Eletrica. Nucleo de Eletricidade Rural e Fontes Alternativas de Energia; Bispo, Decio [Universidade Federal de Uberlandia (UFU), MG (Brazil). Fac. de Engenharia Eletrica. Nucleo de Maquinas Eletricas

    2004-07-01

    The objective of this work is to develop a computational tool to manage the use of electric energy of the university restaurant (Campus Santa Monica) at the Universidade Federal de Uberlandia (UFU) acting only in its working practices flowchart. This work has two phases. The first phase consists in the development of a computational program whose output data are related to electric energy use in a unit consumer, in this case the university restaurant (RU), such as: monthly maximum demand, monthly consumption, daily maximum demand, daily consumption, load factor, daily load curves, the value of the electric energy billing, the electric energy cost necessary to prepare a meal. The second phase, to be shown in a forthcoming paper, consists in the development of software using the Fuzzy Decision- Making System (FDMS). The FDMS will be used as an auxiliary tool to manage the use of electric energy in the RU and is intended to act only in its production process, that is, contemplating the menu's choice and the electric equipment' schedules. The FDMS can be considered as a tool that helps to manage the energy consumption. (author)

  2. Actions to ensure the power and utilities supplying during the start-up and regular operation of the TKCSA steel complex through island operation mode; Acoes para garantir o suprimento de energia eletrica e utilidades durante a fase de start up e de operacao regular do complexo siderurgico da TKCSA (Thyssenkrupp - Companhia Siderurgica do Atlantico) atraves do modo de operacao em ilha

    Energy Technology Data Exchange (ETDEWEB)

    Vianna, Bernardo Matoso T.; Viana, Claudio Sobreira; Vaz, Daniel; Cesario, Fabricio; Pereira, Jose Antonio; Gimenez, Marcus Vinicius O.; Pascotto, Ricardo; Freitas Neto, Roberto Soares; Riederer, Werner [ThyssenKrupp Companhia Siderurgica do Atlantico (TKCSA), Rio de Janeiro, RJ (Brazil)

    2011-12-21

    At TKCSA, the energy and media distribution has an important function in the production processes. The electrical department is responsible for the power system operation, ensuring the receiving, transformation and supplying of this media for the regular and stable operation of the electrical equipment of the steel processes, and another important assignment of the electrical power sector is to guarantee the continuous power supply for the complex, even in case of interruption caused by the external grid, since the blast furnace, steel making and continuous casting cannot be interrupted abruptly. This continuous supply of energy is guaranteed by the Island Operation Mode (IOM), which always aims to ensure the supply of electricity from the Power Plant for the blowers, technical gases distribution system, fuel gases, steam and internal distribution of electricity and industrial water for the steel mill complex. During the complex start up and the regular operation phases, these two distribution systems (electricity and media) work interconnected and are kept in operation by the IOM, being guaranteed by the permanent operation of the electrical power generation system of Power Plant. This work presents how this concept was developed, tested and implemented at TKCSA. (author)

  3. Electric power and traditional communities in the state of Amazonas: learning from the experience of the Roque Community in the Middle Jurua extractive reserve; Energia eletrica e as populacoes tradicionais do Estado do Amazonas: aprendizados a partir da experiencia na Comunidade do Roque na Reserva Extrativista do Medio Jurua

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Celia Salama

    2010-09-15

    This work aims to bring new ideas for expanding access to electricity services to traditional communities in the state of Amazonas including strategies for income generation and improvement of local living conditions. To this end, the main achievements in the community of Roque in the implementation of the project Vegetable Oil for Electricity Generation and Valuation of Biodiversity in Isolated Communities of Extractive Reserve in the Middle Jurua, Carauari, Amazon state were identified and evaluated. Based on the results, a proposal for planning electrification works is formulated that takes into account local knowledge on socioeconomic and environmental conditions. In order to be implemented, such a proposal will require an improvement of the existing regulatory system and the establishment of partnerships or institutional articulation with broad stake holder involvement, including representatives of communities and local power utilities. (author)

  4. Energy management: analysis of reducing energy consumption by sectors of the A.W. Faber-Castell S.A. company; Gerenciamento energetico: analise de reducao do consumo de energia eletrica de setores da empresa A.W. Faber-Castell S.A.

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Jesue Ferraz da [Faculdades Integradas de Sao Carlos (FADISC), SP (Brazil); Branco, Fabio Jose Ceron [Universidade de Sao Paulo (EESC/USP), Sao Carlos, SP (Brazil). Escola de Engenharia

    2009-07-01

    The energy consumption in the sectors that require a lot of input from the company A.W. Faber-Castell S.A. after the implementation of the program to reduce energy consumption by the Internal Committee for Energy Conservation was studied. This program aimed to reduce by 0.5% of electric power in the company.

  5. Challenges for implementation of bioenergy in the Brazilian energy matrix and biomass gasification process for the production of electrical power; Desafios da bioenergia para sua implementacao na matriz energetica brasileira e o processo de gaseificacao da biomassa para a producao de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Figueiroa, E.O.; Moutinho-Junior, D.A.A.; Silva, J.D. [Universidade de Pernambuco (UPE), Recife, PE (Brazil)

    2010-07-01

    The gasification is the conversion of any solid or liquid fuel in fuel gas through the process of the partial oxidation at a high temperature. The gasification process of course occurs in four distinct physicochemical stages with different temperatures of reaction, as drying of the biomass, pyrolysis, reduction and combustion. The reorganization of the Brazilian electric sector foresees technological innovations in the system of electric generation for the country. The process of gasification integrated in a combined cycle (cycle of Brayton and cycle of Rankine) characterizes an innovative technology. It is with noting that this technology is still in improvement, it shows an excellent perspective of commercial viability and efficiency significantly higher than conventional technology. This work presents a study of the gases generated in the zone of combustion and its behavior in the zone of 'freeboard' of a gasifier of fluidized stream bed. For this study, we made the use of one hybrid technique (half-analytical) that is the transformed one of Fourier. (author)

  6. The impacts of the generation of biomass power plants in the Brazilian hydrothermal dispatch and its influence on the formation of prices of electric power in Brazil; Os impactos da geracao de usinas a biomassa no despacho hidrotermico brasileiro e sua influencia na formacao do preco da energia eletrica no Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Luiz Eduardo S.; Ribeiro, Paulo [Universidade Federal de Juiz de Fora (UFJF), MG (Brazil)], Emails: luizeduardo_jf@yahoo.com.br, pfribeiro@ieee.org; Tardin, Thiago V. [Engenho Pesquisa, Desenvolvimento e Consultoria Ltda., Rio de Janeiro, RJ (Brazil)], E-mail: thiago@engenho.com

    2009-07-01

    The positive and negative impacts of the electric energy generation from biomass of sugar in the Brazilian energy matrix are presented, as well as in the hydrothermal dispatch. Studies on the impacts of the generation sources using sugar cane bagasse in the operational planning and in the composition of the electric energy price are done. Computational implementations using optimized methods, as the stochastic dual dynamic programing, are done, to support the decision making and to compare the obtained results. It is, also presented the commercialization rules for energy in the Free Contracting Environment and in the Regulated Contracting Environment related to the alternative sources of energy, as well as the mechanisms of encouraged energy auction (reserve auction) and the rules for commercialization of energy applied to encouraged sources.

  7. Software for calculation the number of lamps, luminaries and its distribution in the environment aiming the efficient use of electric power; Software para o calculo do numero de lampadas, luminarias e da distribuicao no ambiente visando o uso eficiente da energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Teofilo Miguel de; Bianchi, Inacio [Universidade Estadual Paulista (UNESP), Guaratingueta, SP (Brazil). Dept. de Engenharia Eletrica. Centro de Energias Renovaveis], e-mail: teofilo@feg.unesp.br, e-mail: ibianchi@feg.unesp.br

    2004-07-01

    In Brazil artificial lighting contributes with expressive value to electric power consumption. Good performance of lighting system depends of criterion fixed on the electric design conception that takes into account the information about lamps, environment and type of work carried on the local. This paper presents an easy of use and low computational requirements software used to choice lamps, fixtures and its lay-out aiming a good and efficient illumination system design. Its textual format results are displayed at the video monitor, and stored in files, and can be printed and attached to the technical memorial report. So, a presentation of several design options can be furnished quickly through the software for an economic pre-analysis of illumination design. (author)

  8. The generation of electric power in a model of endogenous development: possible solutions for isolated communities in the Amazonas State, Brazil; A geracao de energia eletrica em um modelo de desenvolvimento endogeno: possiveis solucoes para as comunidades isoladas do interior do estado do Amazonas

    Energy Technology Data Exchange (ETDEWEB)

    Teixeira, Andre Frazao; Cavaliero, Carla Kazue Nakao [Universidade Estadual de Campinas (FEM/UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica

    2006-07-01

    This work was developed to fit the generation of electric energy for the isolated communities of the interior of the Amazonas State in a context of endogenous development. A regional development is proposed, with the inclusion of the generation of electric energy for these communities in a context of development, rather than the isolated form proposed in the federal government electrification program of 'Luz Para Todos' (Light For All). (author)

  9. Projection of the electric power consumption of the agricultural sector in the region of the watershed of the river Piracicaba, Capivari and Jundiai; Projecao do consumo de energia eletrica do setor agropecuario na regiao das bacias hidrograficas dos rio Piracicaba, Capivari e Jundiai

    Energy Technology Data Exchange (ETDEWEB)

    Leite, Alvaro Afonso Furtado [Universidade Estadual de Campinas (NIPE/UNICAMP), SP (Brazil). Nucleo Interdisciplinar de Planejamento Energetico; Bajay, Sergio Valdir [Universidade Estadual de Campinas (DE/FEM/UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Energia

    2006-07-01

    Electricity consumption forecasts for the rural economy in the region comprising the Piracicaba, Capivari and Jundiai river basins are carried out in this paper up to 2025. The structural decomposition method was used in the forecasts; the variables of this method are the total energy intensity, the share of the rural economy in the local GDP, the GDP itself and the market shares of the main energy carriers consumed in that economy. It is a very flexible methodology, which easily allows associations among alternative scenarios for the local economy development and stat-wise, or nation-wise scenarios. As no complete information on energy consumption are available on a municipality-wise level, the forecasts are limited to electricity consumption, for which all the necessary input data for the adopted forecasting method were obtained. An example of aggregation of municipalities with similar characteristics in the region (economic growth) is also presented. Such type of aggregation is important to project state-wise forecasts to municipalities in the state. (author)

  10. Analysis of two technological systems for broiler chickens production with emphasis in a rational use of electric energy and animal productivity; Analise de dois sistemas tecnologicos de producao de frango de corte com enfase no uso racional de energia eletrica e produtividade animal

    Energy Technology Data Exchange (ETDEWEB)

    Bueno, Leda Gobbo de Freitas; Rossi, Luiz Antonio [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Agricola. Construcoes Rurais e Ambiencia], e-mail: leda.bueno@agr.unicamp.br, e-mail: rossi@agr.unicamp.br

    2004-07-01

    The creation of broiler intensely depends on electric energy for maintenance of the thermal comfort, automation, and optimize the production and animal productivity. The goal of this research was to quantify and to characterize the electric energy have been used in two commercial sheds of broiler. It was examined the variable concerned to the electric energy (energy efficiency, consumption, demand and factor of power) and the main variable related to the animal productivity (gain of weight, alimentary conversion and mortality). It was analyzed the use of electric energy to keep both the ideal thermal comfort and to observe the broiler productivity performance. The period of the experiment was two years and was considered five lots of creation in different seasons of the year. (author)

  11. Cost analysis of electrical power from an ethanol reformer and the fuel cell in the development of productive activities in the community Pico do Amor, MT, Brazil; Analise do custo da energia eletrica proveniente de um reformador de etanol e celula a combustivel no desenvolvimento de atividades produtivas na comunidade Pico do Amor/MT

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, Davi Gabriel; Teixeira, Andre Frazao; Lopes, Daniel Gabriel; Cavaliero, Carla Kazue Nakao [Universidade Estadual de Campinas (DE/FEM/UNICAMP), SP (Brazil). Faculdade de Engenharia Mecanica. Departamento de Energia; Instituto Aqua Genesis, Campinas, SP (Brazil); Hytron, Campinas, SP (Brazil)

    2010-07-01

    This work has the objective to analyze the impact of the cost of from an ethane reformer / fuel cell in the family income considering the development of two productive activities selected by the community itself: the production and marketing of cassava flour and 'rapadura', a typical brazilian candy. The community energy demand was analyzed to achieve the results; estimated the energy cost from the implemented system and the money from the selling of the cassava flour and 'rapadura' produced with this electricity; the study of sensibility of the ethanol price in the electrical energy cost was done too, and the cassava flour and 'rapadura' in the family funds. From the results, it was verified that the electrical energy cost has a 16,4% impact in the family gross income and a net value around R$ 260,85/family, indicating that the community will have enough funds to pay for the energy and also will rise the amount of money for each family. Besides, the comparative analyze of the cost of the electricity from the ethanol/fuel cell reformer and photovoltaic systems shows that, considering only the maintenance and operation costs, the first one should be more attractive than the second one. (author)

  12. Analysis of the use of 'standard of housing' criterion in the concession of the social tariff of electric power; Analise do emprego do criterio 'padrao de moradia' na concessao da tarifa social de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Tavares, Mauricio Lopes; Ferreira, Elnatan Chagas; Dias, Jose Antonio Siqueira [Universidade Estadual de Campinas (DEMIC/UNICAMP), SP (Brazil). Fac. de Engenharia Eletrica e de Computacao. Dept. de Eletronica e Microeletronica], Email: siqueira@demic.fee.unicamp.br

    2006-07-01

    The question of the electricity's price policy, referred as social tariff, is usually analyzed in terms of the economic sustainability of its application by the concessionaires of public utilities, responsible for its implementation, vis a vis the biggest possible benefit in social terms. To satisfy both of these conditions, it is necessary to definite the criteria that allows to clearly identify the target population who will receive the benefit. This paper analyzes the use of the criterion of 'housing standard' as a criterion for the implementation of the Social Tariff, contributing for the debate on the definition of the social benefits policy for the low-income consumers of electrical energy, currently under revision. (author)

  13. The provision of electricity through a photovoltaic-wind hybrid system in an isolated community in the Jalapao, municipality of Mateiros, state of Tocantins, Brazil; A disponibilizacao de energia eletrica atraves de um sistema hibrido eolico-fotovoltaico em uma comunidade isolada na regiao do Jalapao, municipio de Mateiros, estado do Tocantins

    Energy Technology Data Exchange (ETDEWEB)

    Zukowski Junior, J.C.; Santos, W.F.; Nobrega, S.L. de; Marcon, R.O. [Universidade Luterana do Brasil (CEULP/ULBRA), Palmas, TO (Brazil). Centro Universitario Luterano de Palmas. Curso de Engenharia Agricola], Emails: zukowski@uft.edu.br, olavo@ulbra-to.br, silvestre@ulbra-to.br

    2009-07-01

    Nowadays Brazil has many isolated communities. This isolation occurs mainly due to territorial conditions. Besides this aspect, the lack of structure produces another isolation, much more harmful, the social one. To promote social inclusion and sustainable development, some requirements are essential. Amongst all of them, the provision of electricity is the most prominent. This study aimed to provide electricity to an isolated community in the Jalapao region, Mateiros city, in the state of Tocantins. It was installed a hybrid aeolian-photovoltaic system, with capacity to produce 9676.80 kWh per year. This electricity system aims to improve the production process, so it was installed at the local community workshop. The results indicate that the system can be sustainable if the community makes use of the electricity generation, using it in the production process. (author)

  14. Economic and financial analysis of hybrid solar-wind power generation system installed in a isolated community in Jalapao-Tocantins, Brazil; Analise economica-financeira do sistema de geracao de energia eletrica hibrido solar-eolico instalado em uma comunidade isolada no Jalapao-TO

    Energy Technology Data Exchange (ETDEWEB)

    Santos, W.F.; Zukowski Junior, J.C.; Nobrega, S.L. de; Marcon, R.O. [Universidade Luterana do Brasil (CEULP/ULBRA), Palmas, TO (Brazil). Centro Universitario Luterano de Palmas. Curso de Engenharia Agricola], Emails: zukowski@uft.edu.br, olavo@ulbra-to.br, silvestre@ulbra-to.br

    2009-07-01

    With the increasing of energetic demand in several production sectors, the search for renewable energy sources which do not cause negative environmental impacts has become more and more relevant. Amongst all the important factors to decide for installing isolated generation systems as renewable sources or diesel and taking the distribution network to isolated communities, it should be considered the economic viability of those benefits. This study aimed to analyse the hybrid solar wind system installed in an isolated community, in Jalapao - TO. Three scenarios were analyzed: first of them, getting the capital back with MRI = 6% per year; second one, getting the capital back with MRI = 0; and third, without getting the investment back. In all the three cases, O and M costs were considered. The proceeds were calculated from the production at the communities workshop, in which the electricity was available. The results indicated that this technology is economically viable if the generated energy is used for production process. It also demonstrated that the third scenario is more interesting for the community, since the contribution per family is only 8% of its incomes. (author)

  15. Analysis of economic viability in a hybrid solar-wind system in the generation of electrical energy to an Maroon isolated community of Jalapao - TO, Brazil; Analise da viabilidade economica em um sistema hibrido solar-eolico na geracao de energia eletrica para uma comunidade isolada e quilombola do Jalapao - TO

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Weder Ferreira dos; Zukowski Junior, Joel Carlos; Nobrega, Silvestre Lopes da; Marcon, Rogerio Olavo [Universidade Luterana do Brasil (CEULP/ULBRA), Palmas, TO (Brazil). Centro Universitario Luterano

    2008-07-01

    With the increasing of energetic demand in several production sectors, the search for renewable energy sources which do not cause negative environmental impacts has become more and more relevant. Amongst all the important factors to decide for installing isolated generation systems as renewable sources or diesel and taking the distribution network to isolated communities, it should be considered the economic viability of those benefits. This study aimed to analyse the hybrid solar-aeolian system installed in an isolated community, in Jalapao/TO. Three scenarios were analyzed: first of them, getting the capital back with MRI = 6% per year; second one, getting the capital back with MRI = 0; and third, without getting the investment back. In all the three cases, O and M costs were considered. The proceeds were calculated from the production at the community workshop, in which the electricity was available. The results indicated that this technology is economically viable if the generated energy is used for production process. It also demonstrated that the third scenario is more interesting for the community, since the contribution per family is only 8% of its incomes. (author)

  16. Decision making in cogeneration systems of electric energy: a case study in the sugar-alcohol sector from Mato Grosso do Sul, Brazil; Tomada de decisao em sistemas de cogeracao de energia eletrica: um estudo de caso do setor sucroalcooleiro de Mato Grosso do Sul

    Energy Technology Data Exchange (ETDEWEB)

    Silva, P.P. [Agencia Estadual de Regulacao de Servicos Publicos de Mato Grosso do Sul (AGEPAN), Campo Grande, MS (Brazil); Ortega, J.M. [Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, MS (Brazil)

    2009-07-01

    This paper presents a tool to determine the influence of the regulatory aspects in the decision making related to the power surpluses production by cogeneration, from the sugar cane bagasse in the sugar and alcohol plants in the state of Mato Grosso do Sul, Brazil. The tool was developed from the identification, within the regulatory aspects, of the determinant conditions (interest variables) applied to the modelling of the cogeneration system in a computational environment. The applied technique was the System Dynamic, implemented through the software Powersim. It were identified and understood the various causal relations of the events related to the power cogeneration and applied in the dynamic simulation of the business, and of the interactive processes that influence its viability. The obtained simulation using the tool allowed the identification, of various investment scenarios, and the main influences of the regulatory aspects in the decision making of the investor.

  17. Investigation and comparison of the main corrosion processes on different electric power substations of the Rio Grande de Sul state, Brazil; Investigacao e comparacao dos principais processos de corrosao em diferentes subestacoes de energia eletrica do estado do Rio Grande do Sul

    Energy Technology Data Exchange (ETDEWEB)

    Brusamarello, Valner; Bianchi, Andre L.; Rieder, Ester S.; Balbinot, Alexandre; Wentz, Marcio; Konig, Diogo; Radke, Carlos [Universidade Luterana do Brasil (Ulbra), Canoas, RS (Brazil)

    2006-07-01

    In this work experiments have been developed on four electric power substations, three located at the coastal of the state of Rio Grande do Sul and one at the capital od the state, Porto Alegre city. The study had the objective to determine the corrosion ratios of the different metallic materials exposed to aggressive agents of the environment where the substations are exposed, and to determine the corrosive attack mechanisms of those materials as well, viewing the optimization using of those materials for a more extended useful life.

  18. Viability analysis of electric energy cogeneration in combined cycle with sugar-cane biomass gasification and natural gas; Analise de viabilidade da cogeracao de energia eletrica em ciclo combinado com gaseificacao de biomassa de cana-de-acucar e gas natural

    Energy Technology Data Exchange (ETDEWEB)

    Correa Neto, Vicente

    2001-03-15

    The objective of this thesis is evaluate the technical and economic viability of electric energy generation projects using as fuel the biomass produced in the sugar cane Brazilian industry, specifically the cane trash, the straw and the leaves of the plant, as complemental option to the expansion of the Brazilian electric system, hour in phase of deep modification in the institutional scenery, through the sale of electric energy for direct consumers or utilities, characterizing the business possibilities for the ethanol distilleries already integrated into the energy reality of the country. The analyzed technology is thermoelectric generation with combined cycle, operating in cogeneration, integrated to biomass gasification systems for the production of combustible gas, with and without addition of natural gas. The considered technology is known by the acronym BIG/GTCC, originated in Biomass Integrate Gasification Combined Cycle Gas Turbine. The economic analysis is made herself through a modeling and construction of economy project curves based on the prices of the electric energy, of the natural gas and in the costs of the retired biomass in an mechanized way.(author)

  19. Industrial pollution in the region of Paripe-Salvador: effects on the distribution of electric power and possible damages to human health; Poluicao industrial na regiao de Paripe-Salvador: efeitos sob a distribuicao de energia eletrica e possiveis danos a saude humana

    Energy Technology Data Exchange (ETDEWEB)

    Chaves, Cleuber Sobreira da Silva; Bomfim, Mario Antonio Duarte; Pereira, Osvaldo Soliano [Universidade Salvador (UNIFACS), BA (Brazil). Curso de Mestrado em Regulacao da Industria de Energia], e-mail: cchaves@coelba.com.br, e-mail: osoliano@unifacs.br

    2008-07-01

    In the area of Paripe, in the suburb of Salvador, Bahia, the distribution of electric power of the Company of Electricity of the State of Bahia (COELBA) is facing serious problems with the industrial pollution. That pollution affects the whole distribution net, causing fortuitous lack of energy, in many cases even daily in their feeders. The problem happens due to the accumulation of material associated along the net and more precisely in the distribution insulators, generating a type of dirt, no removable for normal procedures, in the surface of that insulator and it will cause escape currents, causing the lack of energy of the whole distribution electric net. The subject presented in that paper refers to the project of Research and Development (P and D), about Atmospheric Pollution in Insulators of Distribution. The results of the research showed that the atmospheric pollution could cause problems to the population that lives close the polluted area. The purpose of that article is to present relevant data related to the distribution net of COELBA, where there are many lacks of energy and the possibility of do not respect the criterion of quality of the National Agency of Electric power (ANEEL), besides the damages caused the population. (author)

  20. The influence of the reactive energy in the electric power sector planning and the need of consolidation of the hourly period for evaluation of the power factor of the loads; A influencia da energia eletrica reativa no planejamento do setor eletrico e a necessidade de consolidacao do periodo horario para avaliacao do fator de potencia das cargas

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Moacyr Trindade de Oliveira

    1993-07-01

    Among expectations of optimization of electric power systems and the national electric rating laws, there is the important factors of consumption and transmission of reactive energy which concerns the objectives of electric sector. Related to it, the DNAEE, ELETROBRAS and the concessionaires have been developing studies in order to optimize the electric system performance, and consequently the investments of concessionaires and consumers, reducing costs imposed to society due to the form of consumption and/or compensation of reactive loads. This work shows the evolution and consolidation of tariff studies and electric performance of the system, indicating the ways which attend the expectations os all segments of the society through a small adaptation of present regulations an rules related to reactive energy, making possible the system growing in supply by the minimum cost. The main objective of this work is to reinforce the real necessity of to remain intact all the new regulation of power factor, that has been consolidated by the DNAEE's document number 085/92 and your revaluation document number 613/93, including the interval of hourly integration for reactive energy at the determinate date and show the damages for the society caused by the postponement of this condition, that has been considerate in the document number 613/93, from April 1994 until April 1996, however keeping in 1994 the introduction of the new power factor reference of 0.92. (author)

  1. Electric power production from the biogas resulting of the sewer treatment: pilot project of the Sewer Treatment Station (ETE) in the Barueri city in the Great Sao Paulo; Producao de energia eletrica a partir do biogas resultante do tratamento de esgoto: projeto piloto na E.T.E. de Barueri na Grande Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, Suani Teixeira; Martins, Osvaldo Stella; Guardabassi, Patricia; Costa, David Freire da; Avellar, Luiz Henrique Nobre [Centro Nacional de Referencia em Biomassa (CENBIO), Sao Paulo, SP (Brazil)]. E-mail: suani@iee.usp.br; Krovosac, Antonio Carlos Bacic [Companhia de Saneamento Basico do Estado de Sao Paulo, SP (Brazil)]. E-mail: acbacic@sabesp.com.br

    2002-07-01

    This paper describes a system for biogas conversion to electric power and heat by using a micro turbine and three Otto cycle engines. The benefit of the energy from a treatment process residue aims the improvement of the global performance of the system, reducing the the emission of the greenhouse gases and contributing to the global energetic efficiency of the sewage treatment station and the basic sanitation in Brazil.

  2. The influence of the reactive energy in the electric power sector planning and the need of consolidation of the hourly period for evaluation of the power factor of the loads; A influencia da energia eletrica reativa no planejamento do setor eletrico e a necessidade de consolidacao do periodo horario para avaliacao do fator de potencia das cargas

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, Moacyr Trindade de Oliveira

    1993-07-01

    Among expectations of optimization of electric power systems and the national electric rating laws, there is the important factors of consumption and transmission of reactive energy which concerns the objectives of electric sector. Related to it, the DNAEE, ELETROBRAS and the concessionaires have been developing studies in order to optimize the electric system performance, and consequently the investments of concessionaires and consumers, reducing costs imposed to society due to the form of consumption and/or compensation of reactive loads. This work shows the evolution and consolidation of tariff studies and electric performance of the system, indicating the ways which attend the expectations os all segments of the society through a small adaptation of present regulations an rules related to reactive energy, making possible the system growing in supply by the minimum cost. The main objective of this work is to reinforce the real necessity of to remain intact all the new regulation of power factor, that has been consolidated by the DNAEE's document number 085/92 and your revaluation document number 613/93, including the interval of hourly integration for reactive energy at the determinate date and show the damages for the society caused by the postponement of this condition, that has been considerate in the document number 613/93, from April 1994 until April 1996, however keeping in 1994 the introduction of the new power factor reference of 0.92. (author)

  3. Project PAT (Pumps Working as Turbines)/IG (Induction Generators): a new concept for generation of electric power through micro scale hydroelectric power plants; Projeto BFT (Bombas Funcionado como Turbinas)/GI (Geradores de Inducao): um novo conceito para geracao de energia eletrica atraves de microcentrais hidreletricas

    Energy Technology Data Exchange (ETDEWEB)

    Viana, Augusto Nelson Carvalho [Universidade Federal de Itajuba (UNIFEI), Itajuba, MG (Brazil). Inst. de Recursos Naturais. Programa de Pos-graduacao em Engenharia da Energia; Medeiros, Daniel de Macedo; Ricardo, Mateus [Universidade Federal de Itajuba (UNIFEI), Itajuba, MG (Brazil). Inst. de Recursos Naturais], Emails: augusto@unifei.edu.br, macedo@unifei.edu.br, mathidr@yahoo.com.br

    2006-07-01

    The present work has as objective to present the main bases of 'PAT/IG Project', accomplished in Boa Esperanca Farm (Delfim Moreira - MG), by an accord between Itajuba's Federal University and Mines and Energy Ministry. In a moment that the look for sustainable development is the law in Brazil, low costs and environmental impact alternatives must be prioritized. By this way, the PAT/IG Project continuous the Viana's (1987) works, that developed all Brazilian theoretical bases for using Pumps Working as Turbine (PAT). Besides that, the application of induction motors operating as induction generators will be evaluated, as the velocity control system of the PAT/IG group will be developed. The existing Boa Esperanca Farm's micro power plant will be rebuild ed, to receive a new generating group formed for a PAT and a IG, that will be used as natural sized test workbench of Itajuba's Federal University. At the ending of the project, there will be enough subsidies to prove, in practice, the feasibility presented in laboratorial tests by PAT/IG groups as conventional turbines replacer in micro powerplants. (author)

  4. Comparative analysis between two systems to generate electric energy for isolated community in the interior of the Amazon state: fuel cells with natural gas reformer versus diesel generation; Analise comparativa entre dois sistemas de geracao de energia eletrica para a comunidade isolada no interior do estado do Amazonas: celula a combustivel com reformador para gas natural versus gerador diesel

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Paula Duarte; Bergamini, Cristiane Peres; Camargo, Joao Carlos; Lopes, Daniel Gabriel [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Fac. de Engenharia Mecanica; Esteves, Gheisa Roberta Telles [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Nucleo de Pesquisas e Estudos Ambientais; Silva, Ennio Peres da Silva [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Inst. de Fisica Gleb Wataghin

    2004-07-01

    Although great part of the domestic territory is already supplied with electric energy, still there are many regions where the system is precarious or nonexistent, generically called isolated communities. In the majority of the cases these communities are supplied with Diesel oil generators and the substitution of this fuel for available alternative energy in the localities has been object of study of some institutions of research spread throughout the country. Currently, the use of fuel cells has been strongly argued in the generation of electric energy associated with the local energy necessity, from the use of a regional fuel and this is due to the high efficiency of allied energy conversion to the low ambient impacts that this equipment offers. Most of the different types of fuel cells use hydrogen as a fuel to produce electricity, and it is extracted from renewable or non-renewable sources of energy. Then, the article has the objective of comparing in first analysis the energy efficiency and the cost between the two systems: the ones used currently in the great majority of the isolated communities, constituted of a Diesel engine-generator system, with Natural Gas Reformer System/ Purifier of Hydrogen/ Fuel Cell/ and to analyze if such project presents characteristics that qualifies it to get the carbon credits proposed in the Mechanism of Clean Development. (author)

  5. Analysis of the feasibility of applying the theory of the supply chain nanagement for the electric energy chain services of the Bahia state, Brazil; Analise da viabilidade de aplicacao da teoria da gestao da cadeia de suprimentos para a cadeia de servicos de energia eletrica do estado da Bahia

    Energy Technology Data Exchange (ETDEWEB)

    Leal, Lydiane Abdon [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil)], e-mail: lydianeleal@yahoo.com.br; Carvalho, Claudio Bezerra de [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil). Petroleo e Gas], e-mail: claudiobcarvalho@yahoo.com.br

    2008-07-01

    This article aims to analyze the potential application of integrated management, through concepts of SCM (Supply Chain Management), in the chain of the energy industry, which is characterized by a chain of services. The prospect of incorporating new integrated management practices, through the selection of concepts and tools for supply chain management took the possibility of promoting systemic approach that includes the major components (physical, regulatory and commercial) the market of electric energy, investigating possibilities of reorganization of this important segment of the industry production chain. The proposal aims to provide a tool for planning indicative of great potential, to identify a theoretical reference in this important productive sector. The work includes qualitative analyses, which aim to map, understand and systematize the changes undertaken, with emphasis on Brazilian electric sector. It is described, in general, the characterization of the energy industry in Bahia state as a possible case study in implementing the proposed methodology. Thus, the work seeks to help the staff decision to purchase a minimum of integrated vision of possible decisions, including the dynamic interactions between market supply and demand. (author)

  6. Planning projects for generation of electrical energy in the state of Sao Paulo, according to the degree of interference on air quality: an atmospheric qualification index using fuzzy sets; Ordenamento de projetos de geracao de energia eletrica no estado de Sao Paulo, segundo o grau de interferencia na qualidade do ar: um indice de qualificacao atmosferica (IQA) utilizando fuzzy sets

    Energy Technology Data Exchange (ETDEWEB)

    Dzedzej, Maira; Maciel, Jonas Fernandes; Santos, Afonso Henrique Moreira [IX Consultoria e Representacoes Ltda, Itajuba, MG (Brazil); Duarte, Pamella Santos [MS Consultoria Ltda, Itajuba, MG (Brazil); Universidade Federal de Itajuba (UNIFEI), MG (Brazil)

    2010-07-01

    Environmental issues are of great importance when assessing the feasibility and priority installation of new developments in electric power generation. In this sense, fuzzy logic can help define the regions that have favorable characteristics for receiving certain forms of generation. This study sought to order for the State of Sao Paulo, four kinds of generation projects: those using municipal solid waste gasification, those which make use of landfill gas with a change in firing (to reduce emissions), thermoelectric plants (TEPs) to bagasse (with 15% straw) and Small Hydropower (SHP). Such an ordering considered not only the type of generation but also the allocation of projects in the four regions, defined by regional vocations as defined by the State Water Resources Plan (Annex III of the State Law No. 9.034/94): Agriculture, Conservation, In Industrialization and Industrial. As a result, the use of fuzzy sets allowed the creation of a ranking of the alternatives (which totaled 14 possibilities), based exclusively on the degree of interference in air quality resulting from the installation of every form of generation. Such information may help the decision-making governing bodies to establish priorities in order, thereby accelerating the process of installation and operation of projects for generating electricity. (author)

  7. Project PAT (Pumps Working as Turbines)/IG (Induction Generators): a new concept for generation of electric power through micro scale hydroelectric power plants; Projeto BFT (Bombas Funcionado como Turbinas)/GI (Geradores de Inducao): um novo conceito para geracao de energia eletrica atraves de microcentrais hidreletricas

    Energy Technology Data Exchange (ETDEWEB)

    Viana, Augusto Nelson Carvalho [Universidade Federal de Itajuba (UNIFEI), Itajuba, MG (Brazil). Inst. de Recursos Naturais. Programa de Pos-graduacao em Engenharia da Energia; Medeiros, Daniel de Macedo; Ricardo, Mateus [Universidade Federal de Itajuba (UNIFEI), Itajuba, MG (Brazil). Inst. de Recursos Naturais], Emails: augusto@unifei.edu.br, macedo@unifei.edu.br, mathidr@yahoo.com.br

    2006-07-01

    The present work has as objective to present the main bases of 'PAT/IG Project', accomplished in Boa Esperanca Farm (Delfim Moreira - MG), by an accord between Itajuba's Federal University and Mines and Energy Ministry. In a moment that the look for sustainable development is the law in Brazil, low costs and environmental impact alternatives must be prioritized. By this way, the PAT/IG Project continuous the Viana's (1987) works, that developed all Brazilian theoretical bases for using Pumps Working as Turbine (PAT). Besides that, the application of induction motors operating as induction generators will be evaluated, as the velocity control system of the PAT/IG group will be developed. The existing Boa Esperanca Farm's micro power plant will be rebuild ed, to receive a new generating group formed for a PAT and a IG, that will be used as natural sized test workbench of Itajuba's Federal University. At the ending of the project, there will be enough subsidies to prove, in practice, the feasibility presented in laboratorial tests by PAT/IG groups as conventional turbines replacer in micro powerplants. (author)

  8. Generation potential of electric power surplus with the biogas produced from anaerobic bio digestion of vinasse in Brazilian sugar-ethanol industry; Potencial de geracao de excedentes de energia eletrica com o biogas produzido a partir da biodigestao da vinhaca na industria sucro-alcooleira brasileira

    Energy Technology Data Exchange (ETDEWEB)

    Lamonica, Helcio Martins [Universidade Estadual de Campinas (DE/FEM/UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Energia

    2006-07-01

    This work evaluates the electric power potential of the Brazilian sugarcane industry using the biogas produced by vinasse biodigestion in internal combustion engine driven generators. The electric power surplus based on crop 2004/05 ethanol production data is 9,292 TJ/year (2.6 TWh/year), 0.75% of the total electric power consumption in Brazil during the year of 2003. In spite of its considerable potential the determined minimum selling price for its produced energy of R$ 89.98/GJ (R$ 323.92/MWh) is expensive for present Brazilian electric power market price. (author)

  9. Spare nonlinear systems resolution; its applicability in the resolution of the problem related power flow in electric power networks; Resolucao de sistemas nao-lineares esparsos; sua aplicacao na resolucao do problema de fluxo de carga em redes de energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Duran, Ana Cecilia

    1990-03-01

    This thesis aims to find a better way to solve large scale nonlinear sparse system problems giving special emphasis to load flow in electric power networks. The suggested algorithms are presented 63 refs., 28 figs., 16 tabs.

  10. Quantification and location of emergency service mobile units and the failures in electric power distribution networks: application of hypercube model; Quantificacao e locacao de unidades moveis de atendimento de emergencia a interrupcoes em redes de distribuicao de energia eletrica: aplicacao do modelo hipercubo

    Energy Technology Data Exchange (ETDEWEB)

    Albino, Jean Carlo de Campos

    1994-11-01

    The basic hypercube queuing model, as well its approximated version, are normally used to analyze public emergency systems`performance. Both models, however, can be used only when the system has no geographical limitation of its Emergency Mobile Units (EMU), i.e, in systems in which the region`s atoms can be attended by any EMU, meaning that each EMU can over the entirety of the analysed region. In systems that does not present this property, one could only use simulation techniques. This paper presents an adaptation of the basic hypercube model that was developed for cases of urban emergency systems in which the EMU`s are not allowed or not worthwhile to cover the entire region. This adapted version is called Limited Hypercube Model (LHM). Modifications have been made in several steps of the basic model, and has brought a new analysis perspective, by amplifying the hypercube`s application universe and allowing mathematical description of some limited systems` specific features. The LHM was applied to analyze an electric energy distribution public service at Florianopolis, and the results are discussed in the paper. (author) 12 refs., 11 figs., 14 tabs.

  11. Rationalization of the electric power consumption by recycling of residential solid wastes from the formal and informal collection at the Campinas city, Sao Paulo, Brazil; Racionalizacao do consumo de energia eletrica com a reciclagem dos residuos solidos domiciliares provenientes da coleta formal e informal no municipio de Campinas - SP

    Energy Technology Data Exchange (ETDEWEB)

    Streb, Cleci Schalemberger; Piunti, Regina Celia; Silva, Ennio Peres da; Barbosa, Sonia [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia Mecanica. Programa de Planejamento de Sistemas Energeticos]. E-mail: streb@fem.unicamp.br

    2002-07-01

    This paper evaluates the potential of residues collection in Campinas, SP, Brazil, taking into account the data of informal collection. The paper also estimates the role played by paper, glass, plastic and aluminium recycling, in terms of electric power use avoiding or saving.

  12. Environmental radiometric control at the vicinity of the Instituto de Energia Atomica, Sao Paulo, Brazil

    International Nuclear Information System (INIS)

    Bedani, M.I.

    1979-01-01

    Optimized derived limits (ODL) for gaseous and liquid wastes released to the environment of Instituto de Energia Atomica (IEA) following the ICRP's recommendations were determined. Techniques for routine environmental monitoring were implanted in order to ensure that these limits be respected. The treatment of liquid wastes which gives rise to the optimized discharge resulted from cost-benefit analysis, is the elimination of medium half-lived radioisotopes in the soil. The ODL value for iodine-131 is 50mCi/y and 7,5 Ci/y for gaseous and liquid effluents, respectively. The ODL values for other radionuclides of radiosanitary interest in liquid waste also determined. The most appropriate environmental monitoring techniques for IEA were studied and parameters of radioactive material dilution in the atmosphere and water courses were determined. Sample collection points were chosen to obtain the most representative data for the evaluation of radioactive dose in the critical group and the detriment produced in the population. Detection system and methods were calibrated and standardized for the determination of radionuclides in wastes released from IEA in order to evaluate their concentrations in the main transference pathways. (Author) [pt

  13. O nexo água, energia e alimentos no contexto da Metrópole Paulista

    Directory of Open Access Journals (Sweden)

    LEANDRO LUIZ GIATTI

    Full Text Available RESUMO Em face do contexto de contingências e interdependências inerentes ao desenvolvimento sustentável, emerge a recente abordagem do nexo de compensações e/ou possíveis sinergias nas demandas e provimentos de água, energia e alimentos, ao que se dirige este texto enquanto uma contribuição conceitual e ensaio de aplicação e problematização, enfocando o recorte territorial da Macrometrópole Paulista. Nesta análise, pautamos desafios de aplicabilidade do nexo quanto a escalas espacial e temporal e a questão da governança. Sendo o território macrometropolitano marcado pela escassez hídrica, esse território permite vislumbrar essas questões desafiadoras do nexo. Conclui-se quanto ao poder da abordagem do nexo como contribuição ao desenvolvimento sustentável e que, a perspectiva de sua governança conecta-se com a perspectiva necessária de reflexividade.

  14. Project of energy saving in compressed air; Proyecto de ahorro de energia en aire comprimido

    Energy Technology Data Exchange (ETDEWEB)

    Automatizacion, Productividad y Calidad S.A. de C.V. Puebla, (Mexico)

    2005-07-01

    The objective of this project is to reduce the operation costs by means of the energy saving through the use of the compressed air system. For this purpose the solenoid valves controlled per time and the manually acted valves of sphere must be replaced by pneumatic purges that remove from the system the condensed humidity without discharging air and which act automatically when the water reaches the level of unloading in its deposit. The pressure level is the reduction of the operation rank of pressure in the compressors, satisfying the operation requirements of the process equipment. [Spanish] El objetivo de este proyecto es reducir el costo de operacion mediante el ahorro de energia en la utilizacion del sistema de aire comprimido. Para ello se tienen que remplazar las valvulas solenoides controladas por tiempo y valvulas de esfera actuadas manualmente por purgas neumaticas que remueven del sistema la humedad condensada sin descargar aire y que actuan en forma automatica al alcanzar el agua el nivel de descarga en su deposito. El nivel de presion es la reduccion del rango de operacion de presion de los compresores, satisfaciendo los requerimientos de operacion de los equipos de proceso.

  15. Municipal hydraulic planning for energy saving; Planeacion hidraulica municipal para el ahorro de energia

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Garcia, Enrique [PTF S.C. Consultores, Leon, Gto. (Mexico)

    1999-07-01

    The efficient handling of the economic and natural resources of the municipalities, is nowadays so much complex, that it requires a formal planning. In the public service of potable water supply, two fundamental approaches are conjugated to consider: the rational use of the water resource and the efficient use of the electrical energy, for its extraction from the underground deep reservoirs. In the paper that is presented, the individual features of the previous matters are described and the positive results in a municipality of the Guanajuato's Low Lands (Bajio ), where already the dual objectives are obtained and that with a more professional municipal hydraulic planning, these will be permanent, with the inherent benefit towards the population. [Spanish] El manejo eficiente de los recursos economicos y naturales de los municipios, es hoy en dia cada vez mas complejo, que requiere una planeacion formal. En el servicio publico de abastecimiento de agua potable, se conjugan dos enfoques primordiales a considerar: el uso racional del recurso agua y la utilizacion eficiente de la energia electrica, para su extraccion de los acuiferos subterraneos profundos. En el trabajo que se presenta, se describen las particularidades de lo anterior y los resultados positivos en un municipio del Bajio guanajuatense, donde ya se logran los objetivos duales y que con una planeacion hidraulica municipal mas profesional, estos seran permanentes, con el beneficio inherente hacia la poblacion.

  16. Energy and the exercise of the power; Energia y ejercicio del poder

    Energy Technology Data Exchange (ETDEWEB)

    Quiros Corradi, Alberto [Maraven S.A. (Venezuela)

    2007-07-15

    In different periods of the history, the central spot of the power game, played among nations, has been occupied by certain specific topics for a while. Among the occupants there are found: ground, food, religion, treasure and trade. Despite the fact that his arrival was unnoticed, there have been already 20 years since the energy -more specifically by the crude oil- has become the new occupant of such spot. Although, this occupant is not going to be the last one, it still has a long way to cover on the spot of the worldwide forces. [Spanish] En diferentes periodos de la historia, ciertos temas especificos han llegado a ocupar durante algun tiempo una posicion focal en el juego de poder entre naciones, grupos o individuos. Entre esos temas estan la tierra, los alimentos, la religion, el tesoro y el comercio. En los ultimos 20 anos, y de manera inadvertida en un principio, la energia -mas especificamente el petroleo- ha pasado a ocupar este papel central. Si bien no se puede esperar que lo retenga para siempre, en los proximos anos seguira en el centro de la interaccion de las fuerzas mundiales.

  17. Evaluation of radioactive wastes in Instituto de Energia Atomica (Sao Paulo-Brazil)

    International Nuclear Information System (INIS)

    Sawakuchi, R.S.

    1978-01-01

    An evaluation of present and future production of radioactive waste in several departments of the Instituto de Energia Atomica has been done. Taking into account this evaluation, the criteria for disposal and convenient treatment technique have been studied. The most critical form of liquid radioactive waste is that of 131 I processing because high concentration of radiotellurium always accompanies this form of waste. Ion exchange and precipitation techniques were used to study this waste processing. Two kinds of resins were used by the ion exchange method: the strong anionic and the stron cationic. Quantitative tellurium retention has not been attained by the ion exchange method using either resins. The technique of precipitation of radioactive tellurium as ammonium tellurate was also used, allowing us to obtain more than 99% of tellurium removal. The remaining radioactive wastes can be eliminated using the storage for decay criteria with further release to the sewers in the case of liquids and burial in the case of solids. (Author) [pt

  18. Advantage of the renewable energies in isolated zones; Aprovechamiento de las energias renovables en zonas aisladas

    Energy Technology Data Exchange (ETDEWEB)

    Mendoza Zazueta, Jose Antonio [Fideicomiso de Riesgo Compartido de la SAGARPA (Mexico)

    2007-07-15

    The present article has as objective to present the experiences obtained for more than ten years, in the development and implementation of actions that in the matter of renewable energy have been orchestrated in the Mexican field by the Secretariat of Agriculture, Animal Industry, Rural Development, Fishing, and Nutrition, trough the Shared Risk Trust Fund. The activities began in 1994; the most common applications realized are the water pumping for the drinking trough of cattle and the automation of the irrigation in small surfaces with fruit trees, vegetables, forages and the operation of greenhouses. [Spanish] El presente articulo tiene como objetivo presentar las experiencias obtenidas durante mas de diez anos, en el desarrollo e implementacion de acciones que en materia de energia renovable se han instrumentado en el campo mexicano por la the Secretaria de Agricultura, Ganaderia, Desarrollo Rural Pesca y Alimentacion, a traves del Fideicomiso de Riesgo Compartido. Las actividades se iniciaron en 1994, las aplicaciones mas comunes realizadas son el bombeo de agua para el abrevadero de ganado y la tecnificacion del riego en pequenas superficies con frutales, hortalizas, forrajes y la operacion de invernaderos.

  19. Cernavoda NPP: The contribution of ANSALDO ENERGIA to the development of the Nuclear Program in Romania

    International Nuclear Information System (INIS)

    Graziosi, G.; Benvenuto, F.

    2005-01-01

    Full text: The development of east European countries has been very slow during the second part of the 20th century, but, with the end of the cold war, they are recovering through a continuous improvement of their economy. The continuous improvement of the countries is usually accompanied by an increase of the energy demand and, as consequence, a rapid increase of their energy production is taking place. It is strategic that the energy production of these countries be based on earliest technologies available today, in order to avoid the worsening of the problems deriving from the energy policies adopted by the western countries: one for all the CO 2 emission in the atmosphere. Clearly to promote the use of new technologies in the growing east European countries, a tied collaboration between western and eastern European countries is essential. This is the case of Romania. The agreement reached by Romania with the Italian and Canadian industries (Ansaldo Energia and AECL) has permitted: - The construction and commissioning of Cernavoda Unit 1 NPP, realized adopting CANDU technology and in operation since 1996; - The continuous maintenance / surveillance / improvement (through a specific service agreement) that assures the safe production of the energy; - The realization of a new Nuclear Power Station: Cernavoda Unit 2, adopting the last technology available for the CANDU type. Its operation is expected to start in 2007. Furthermore, benefit/cost evaluation is under analysis in order to verify the possibility to realize Cernavoda Unit 3 NPP. (authors)

  20. Cernavoda NPP: The contribution of ANSALDO ENERGIA to the development of the Nuclear Program in Romania

    International Nuclear Information System (INIS)

    Graziosi, G.; Benvenuto, F.

    2005-01-01

    The development of east European countries has been very slow during the second part of the 20th century, but, with the end of the cold war, they are recovering through a continuous improvement of their economy. The continuous improvement of the countries is usually accompanied by an increase of the energy demand and, as consequence, a rapid increase of their energy production is taking place. It is strategic that the energy production of these countries be based on earliest technologies available today, in order to avoid the worsening of the problems deriving from the energy policies adopted by the western countries: one for all the CO 2 emission in the atmosphere. Clearly to promote the use of new technologies in the growing east European countries, a tied collaboration between western and eastern European countries is essential. This is the case of Romania. The agreement reached by Romania with the Italian and Canadian industries (ANSALDO ENERGIA and AECL) has permitted: - The construction and commissioning of Cernavoda Unit 1 NPP, realized adopting CANDU technology and in operation since 1996; - The continuous maintenance / surveillance / improvement (through a specific service agreement) that assures the safe production of the energy; - The realization of a new Nuclear Power Station: Cernavoda Unit 2, adopting the last technology available for the CANDU type. Its operation is expected to start in 2007. Furthermore, benefit/cost evaluation is under analysis in order to verify the possibility to realize Cernavoda Unit 3 NPP. (authors)