WorldWideScience

Sample records for hydropower production planning

  1. Short-term hydropower production planning by stochastic programming

    DEFF Research Database (Denmark)

    Fleten, Stein-Erik; Kristoffersen, Trine

    2008-01-01

    Within the framework of multi-stage mixed-integer linear stochastic programming we develop a short-term production plan for a price-taking hydropower plant operating under uncertainty. Current production must comply with the day-ahead commitments of the previous day which makes short...

  2. Hydropower

    DEFF Research Database (Denmark)

    Fenhann, Jørgen Villy; Kofoed, Jens Peter

    2010-01-01

    This chapter gives an overview of the various forms of hydropower: conventional hydropower, marine currents, tides, power from salinity gradients, ocean thermal energy conversion and wave power.......This chapter gives an overview of the various forms of hydropower: conventional hydropower, marine currents, tides, power from salinity gradients, ocean thermal energy conversion and wave power....

  3. Electrolysis Production of Hydrogen from Wind and Hydropower Workshop Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    None

    2003-09-01

    This document summarizes the opportunities and challenges for low-cost renewable hydrogen production from wind and hydropower. The Workshop on Electrolysis Production of Hydrogen from Wind and Hydropower was held September 9-10, 2003.

  4. Hydrologic Forecasting and Hydropower Production

    Science.gov (United States)

    Wigmosta, M. S.; Voisin, N.; Lettenmaier, D. P.; Coleman, A.; Mishra, V.; Schaner, N. A.

    2011-12-01

    Hydroelectric power production is one of many competing demands for available water along with other priority uses such as irrigation, thermoelectric cooling, municipal, recreation, and environmental performance. Increasingly, hydroelectric generation is being used to offset the intermittent nature of some renewable energy sources such as wind-generated power. An accurate forecast of the magnitude and timing of water supply assists managers in integrated planning and operations to balance competing water uses against current and future supply while protecting against the possibility of water or energy shortages and excesses with real-time actions. We present a medium-range to seasonal ensemble streamflow forecasting system where uncertainty in forecasts is addressed explicitly. The integrated forecast system makes use of remotely-sensed data and automated spatial and temporal data assimilation. Remotely-sensed snow cover, observed snow water equivalent, and observed streamflow data are used to update the hydrologic model state prior to the forecast. In forecast mode, the hydrology model is forced by calibrated ensemble weather/climate forecasts. This system will be fully integrated into a water optimization toolset to inform reservoir and power operations, and guide environmental performance decision making. This flow forecast system development is carried out in agreement with the National Weather Service so that the system can later be incorporated into the NOAA eXperimental Ensemble Forecast Service (XEFS).

  5. Balancing hydropower production and river bed incision in operating a run-of-river hydropower scheme along the River Po

    Science.gov (United States)

    Denaro, Simona; Dinh, Quang; Bizzi, Simone; Bernardi, Dario; Pavan, Sara; Castelletti, Andrea; Schippa, Leonardo; Soncini-Sessa, Rodolfo

    2013-04-01

    Water management through dams and reservoirs is worldwide necessary to support key human-related activities ranging from hydropower production to water allocation, and flood risk mitigation. Reservoir operations are commonly planned in order to maximize these objectives. However reservoirs strongly influence river geomorphic processes causing sediment deficit downstream, altering the flow regime, leading, often, to process of river bed incision: for instance the variations of river cross sections over few years can notably affect hydropower production, flood mitigation, water supply strategies and eco-hydrological processes of the freshwater ecosystem. The river Po (a major Italian river) has experienced severe bed incision in the last decades. For this reason infrastructure stability has been negatively affected, and capacity to derive water decreased, navigation, fishing and tourism are suffering economic damages, not to mention the impact on the environment. Our case study analyzes the management of Isola Serafini hydropower plant located on the main Po river course. The plant has a major impact to the geomorphic river processes downstream, affecting sediment supply, connectivity (stopping sediment upstream the dam) and transport capacity (altering the flow regime). Current operation policy aims at maximizing hydropower production neglecting the effects in term of geomorphic processes. A new improved policy should also consider controlling downstream river bed incision. The aim of this research is to find suitable modeling framework to identify an operating policy for Isola Serafini reservoir able to provide an optimal trade-off between these two conflicting objectives: hydropower production and river bed incision downstream. A multi-objective simulation-based optimization framework is adopted. The operating policy is parameterized as a piecewise linear function and the parameters optimized using an interactive response surface approach. Global and local

  6. Hydropower

    CSIR Research Space (South Africa)

    Jonker Klunne, W

    2012-10-01

    Full Text Available —that is not consumed in the process, it is, in principle, a renewable form of energy. The use of hydropower can make a contribution to saving exhaustible energy sources such as fossil fuels....

  7. Future hydropower production in the Lower Zambezi under possible ...

    African Journals Online (AJOL)

    For such a long-term development, the possible impact of climate change on the future production is of essential interest. The objective of the presented study is to assess hydropower generation in the 21st century for a future hydropower development scenario under two climate scenarios. The two climate scenarios ...

  8. SEE HYDROPOWER Project, targeted to improve water resource management for a growing renewable energy production

    Science.gov (United States)

    Peviani, Maximo; Alterach, Julio; Danelli, Andrea

    2010-05-01

    The three years SEE HYDROPOWER project started on June 2009, financed by the South-East Transnational Cooperation Programme (EU), aims to a sustainable exploitation of water concerning hydropower production in SEE countries, looking up to renewable energy sources development, preserving environmental quality and preventing flood risk. Hydropower is the most important renewable resource for energy production in the SEE countries but creates ecological impacts on a local scale. If on one hand, hydroelectric production has to be maintained and likely increased following the demand trend and RES-e Directive, on the other hand, hydropower utilisation often involves severe hydrological changes, damages the connectivity of water bodies and injures river ecosystems. The project gives a strong contribution to the integration between the Water Frame and the RES-e Directives in the involved countries. The SEE HYDROPOWER project promotes the optimal use of water, as multiple natural resources, in order to face the increasing regional electrical-energy demand. Furthermore, SEE HYDROPOWER defines specific needs and test methodologies & tools, in order to help public bodies to take decisions about planning and management of water and hydropower concessions, considering all multi-purposes uses, taking into account the environmental sustainability of natural resources and flooding risks. Investigations is carried on to define common strategies & methods for preserving river with particular concerns to aquatic ecosystems, considering the required Minimum Environmental Flow, macro-habitat quality, migratory fishes and related environmental issues. Other problem addressed by the Project is the contrast between Public Administration and Environmental associations on one side and the Hydropower producers on the other side, for the exploitation of water bodies. Competition between water users (for drinking, irrigation, industrial processes, power generation, etc.) is becoming a serious

  9. Hydropower Modeling Challenges

    Energy Technology Data Exchange (ETDEWEB)

    Stoll, Brady [National Renewable Energy Lab. (NREL), Golden, CO (United States); Andrade, Juan [National Renewable Energy Lab. (NREL), Golden, CO (United States); Cohen, Stuart [National Renewable Energy Lab. (NREL), Golden, CO (United States); Brinkman, Greg [National Renewable Energy Lab. (NREL), Golden, CO (United States); Brancucci Martinez-Anido, Carlo [National Renewable Energy Lab. (NREL), Golden, CO (United States)

    2017-04-19

    Hydropower facilities are important assets for the electric power sector and represent a key source of flexibility for electric grids with large amounts of variable generation. As variable renewable generation sources expand, understanding the capabilities and limitations of the flexibility from hydropower resources is important for grid planning. Appropriately modeling these resources, however, is difficult because of the wide variety of constraints these plants face that other generators do not. These constraints can be broadly categorized as environmental, operational, and regulatory. This report highlights several key issues involving incorporating these constraints when modeling hydropower operations in terms of production cost and capacity expansion. Many of these challenges involve a lack of data to adequately represent the constraints or issues of model complexity and run time. We present several potential methods for improving the accuracy of hydropower representation in these models to allow for a better understanding of hydropower's capabilities.

  10. Trade-offs of water use for hydropower generation and biofuel production in the Zambezi basin in Mozambique

    Science.gov (United States)

    Stanzel, Philipp; Kling, Harald; Nicholson, Kit

    2014-05-01

    Hydropower is the most important energy source in Mozambique, as in many other southern African countries. In the Zambezi basin, it is one of the major economic resources, and substantial hydropower development is envisaged for the next decades. In Mozambique, the extension of the large Cahora Bassa hydropower plant and the construction of several new facilities downstream are planned. Irrigated agriculture currently plays a minor role, but has a large potential due to available land and water resources. Irrigation development, especially for the production of biofuels, is an important government policy goal in Mozambique. This contribution assesses interrelations and trade-offs between these two development options with high dependence on water availability. Potential water demand for large-scale irrigated agriculture is estimated for a mix of possible biofuel crops in three scenarios with different irrigated area sizes. Impacts on river discharge and hydropower production in the Lower Zambezi and its tributaries under two projected future climates are simulated with a hydrological model and a reservoir operation and hydropower model. Trade-offs of increasing biofuel production with decreasing hydropower generation due to diminished discharge in the Zambezi River are investigated based on potential energy production, from hydropower and biofuels, and resulting gross revenues and net benefits. Results show that the impact of irrigation withdrawal on hydropower production is rather low due to the generally high water availability in the Zambezi River. In simulations with substantial irrigated areas, hydropower generation decreases by -2% as compared to a scenario with only small irrigated areas. The economic analyses suggest that the use of water for cultivation of biofuel crops in the Zambezi basin can generate higher economic benefits than the use of water for hydroelectric power production. If world oil prices stay at more than about 80 USD/barrel, then the

  11. Use of multicriteria analysis (MCA) for sustainable hydropower planning and management.

    Science.gov (United States)

    Vassoney, Erica; Mammoliti Mochet, Andrea; Comoglio, Claudio

    2017-07-01

    Multicriteria analysis (MCA) is a decision-making tool applied to a wide range of environmental management problems, including renewable energy planning and management. An interesting field of application of MCA is the evaluation and analysis of the conflicting aspects of hydropower (HP) exploitation, affecting the three pillars of sustainability and involving several different stakeholders. The present study was aimed at reviewing the state of the art of MCA applications to sustainable hydropower production and related decision-making problems, based on a detailed analysis of the scientific papers published over the last 15 years on this topic. The papers were analysed and compared, focusing on the specific features of the MCA methods applied in the described case studies, highlighting the general aspects of the MCA application (purpose, spatial scale, software used, stakeholders, etc.) and the specific operational/technical features of the selected MCA technique (methodology, criteria, evaluation, approach, sensitivity, etc.). Some specific limitations of the analysed case studies were identified and a set of "quality indexes" of an exhaustive MCA application were suggested as potential improvements for more effectively support decision-making processes in sustainable HP planning and management problems. Copyright © 2017 Elsevier Ltd. All rights reserved.

  12. A Multi-Year Plan for Research, Development, and Prototype Testing of Standard Modular Hydropower Technology

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Brennan T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Welch, Tim [U.S. Department of Energy (DOE), Washington, DC (United States).Office of Energy Efficiency and Renewable Energy (EERE); Witt, Adam M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Stewart, Kevin M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lee, Kyutae [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); DeNeale, Scott T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Bevelhimer, Mark S. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Burress, Timothy A. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Pracheil, Brenda M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Pries, Jason L. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); O' Connor, Patrick W. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Curd, Shelaine L. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Ekici, Kivanc [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Papanicolaou, Thanos [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Tsakiris, Achilleas [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Kutz, Benjamin [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Bishop, Norm [Knight Piesold, Denver, CO (United States); McKeown, Alisha [McKeown and Associates, Moberly, MO (United States); Rabon, Daniel [U.S. Department of Energy (DOE), Washington, DC (United States).Office of Energy Efficiency and Renewable Energy (EERE); Zimmerman, Gregory P. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Uria Martinez, Rocio [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); McManamay, Ryan A. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2017-02-01

    The Multi-Year Plan for Research, Development, and Prototype Testing of Standard Modular Hydropower Technology (MYRP) presents a strategy for specifying, designing, testing, and demonstrating the efficacy of standard modular hydropower (SMH) as an environmentally compatible and cost-optimized renewable electricity generation technology. The MYRP provides the context, background, and vision for testing the SMH hypothesis: if standardization, modularity, and preservation of stream functionality become essential and fully realized features of hydropower technology, project design, and regulatory processes, they will enable previously unrealized levels of new project development with increased acceptance, reduced costs, increased predictability of outcomes, and increased value to stakeholders. To achieve success in this effort, the MYRP outlines a framework of stakeholder-validated criteria, models, design tools, testing facilities, and assessment protocols that will facilitate the development of next-generation hydropower technologies.

  13. Hydrograph variances over different timescales in hydropower production networks

    Science.gov (United States)

    Zmijewski, Nicholas; Wörman, Anders

    2016-08-01

    The operation of water reservoirs involves a spectrum of timescales based on the distribution of stream flow travel times between reservoirs, as well as the technical, environmental, and social constraints imposed on the operation. In this research, a hydrodynamically based description of the flow between hydropower stations was implemented to study the relative importance of wave diffusion on the spectrum of hydrograph variance in a regulated watershed. Using spectral decomposition of the effluence hydrograph of a watershed, an exact expression of the variance in the outflow response was derived, as a function of the trends of hydraulic and geomorphologic dispersion and management of production and reservoirs. We show that the power spectra of involved time-series follow nearly fractal patterns, which facilitates examination of the relative importance of wave diffusion and possible changes in production demand on the outflow spectrum. The exact spectral solution can also identify statistical bounds of future demand patterns due to limitations in storage capacity. The impact of the hydraulic description of the stream flow on the reservoir discharge was examined for a given power demand in River Dalälven, Sweden, as function of a stream flow Peclet number. The regulation of hydropower production on the River Dalälven generally increased the short-term variance in the effluence hydrograph, whereas wave diffusion decreased the short-term variance over periods of <1 week, depending on the Peclet number (Pe) of the stream reach. This implies that flow variance becomes more erratic (closer to white noise) as a result of current production objectives.

  14. Tools for Small Hydropower Plant Resource Planning and Development: A Review of Technology and Applications

    Directory of Open Access Journals (Sweden)

    Gitana Vyciene

    2011-08-01

    Full Text Available This paper reviews and compares software tools for the planning and design of small hydropower (SHP plants. The main emphasis is on small scale hydropower resource assessment computer tools and methodologies for the development of SHP plants corresponding to a preliminary or prefeasibility study level. The paper presents a brief evaluation of the historic software tools and the current tools used in the small hydro industry. The reviewed tools vary from simple initial estimates to quite sophisticated software. The integration of assessment tools into Geographic Information System (GIS environments has led to a leap forward in the strengthening of the evaluation of the power potential of water streams in the case of the spatial variability of different factors affecting stream power. A number of countries (e.g., Canada, Italy, Norway, Scotland and the US have re-assessed their hydropower capacities based on spatial information of their water stream catchments, developing tools for automated hydro-site identification and deploying GIS-based tools, so-called Atlases, of small-scale hydropower resources on the Internet. However, a reliable assessment of real SHP site feasibility implies some “on the ground” surveying, but this traditional assessment can be greatly facilitated using GIS techniques that involve the spatial variability of catchment characteristics.

  15. Future hydropower production in the Lower Zambezi under possible ...

    African Journals Online (AJOL)

    2014-01-15

    Jan 15, 2014 ... considering climate risk in technical design and financial assessment of hydropower projects in the region. Keywords: Zambezi River .... freely available reservoir simulation software developed and maintained by the US ... level at the top of the guide curve elevation, while obeying all further defined rules ...

  16. Climate Risk in Southern and Eastern Africa's Hydropower Generation

    Science.gov (United States)

    Dalin, C.; Conway, D.; Landman, W.; Osborn, T.

    2016-12-01

    Hydropower comprises a major proportion of electricity production in southern and eastern Africa and is undergoing rapid expansion. Hydropower production in both regions is exposed to high levels of climate variability and regional linkages are strong, yet an understanding of aggregate climate risk is lacking. Here we map regions of coherent precipitation variability with current and planned (2030) hydropower sites, river basin configuration and regional energy grids to assess aggregate exposure to hydropower supply disruption. If fully implemented hydropower will be increasingly concentrated in the Nile basin in eastern Africa and the Zambezi basin in southern Africa. Regions of similar rainfall variability show close alignment with the main sites of hydropower. Future concentration of hydropower will greatly increase the concurrent risk of climate related electricity supply disruption. Nascent electricity sharing mechanisms could mitigate risk but face considerable political and infrastructural challenges.

  17. Land Use and Land Cover Changes under Climate Uncertainty: Modelling the Impacts on Hydropower Production in Western Africa

    Directory of Open Access Journals (Sweden)

    Salomon Obahoundje

    2017-01-01

    Full Text Available The Bui hydropower plant plays a vital role in the socio-economic development of Ghana. This paper attempt to explore the combined effects of climate-land use land cover change on power production using the (WEAP model: Water Evaluation and Planning system. The historical analysis of rainfall and stream flow variability showed that the annual coefficient of variation of rainfall and stream flow are, respectively, 8.6% and 60.85%. The stream flow varied greatly than the rainfall, due to land use land cover changes (LULC. In fact, the LULC analysis revealed important changes in vegetative areas and water bodies. The WEAP model evaluation showed that combined effects of LULC and climate change reduce water availability for all of demand sectors, including hydropower generation at the Bui hydropower plant. However, it was projected that Bui power production will increase by 40.7% and 24.93%, respectively, under wet and adaptation conditions, and decrease by 46% and 2.5%, respectively, under dry and current conditions. The wet condition is defined as an increase in rainfall by 14%, the dry condition as the decrease in rainfall by 15%; current account is business as usual, and the adaptation is as the efficient use of water for the period 2012–2040.

  18. Hydropower Projects

    Energy Technology Data Exchange (ETDEWEB)

    None

    2015-04-02

    The Water Power Program helps industry harness this renewable, emissions-free resource to generate environmentally sustainable and cost-effective electricity. Through support for public, private, and nonprofit efforts, the Water Power Program promotes the development, demonstration, and deployment of advanced hydropower devices and pumped storage hydropower applications. These technologies help capture energy stored by diversionary structures, increase the efficiency of hydroelectric generation, and use excess grid energy to replenish storage reserves for use during periods of peak electricity demand. In addition, the Water Power Program works to assess the potential extractable energy from domestic water resources to assist industry and government in planning for our nation’s energy future. From FY 2008 to FY 2014, DOE’s Water Power Program announced awards totaling approximately $62.5 million to 33 projects focused on hydropower. Table 1 provides a brief description of these projects.

  19. Hydropower production from bridges in urban or suburban areas

    Science.gov (United States)

    Tucciarelli, Tullio; Sammartano, Vincenzo; Sinagra, Marco; Morreale, Gabriele; Ferreira, Teresa

    2015-04-01

    A new technology for hydropower production from rivers crossing urban or suburban areas is proposed, based on the use of Cross-Flow turbines having its axis horizontal and normal to the flow direction. A large part of the river cross-section could be covered by the turbine cross-section and this would generate a small, but consistent jump between the water levels of the inlet and the outlet sections. The turbine should be anchored to a pre-existing bridge and the total length of its axis should be of the same order of the bridge length. Due to the large axis extension, it should be possible to easily attain a gross power similar to the power produced with a more traditional installation, based on weirs or barrages, if single jumps of few tens of centimeters were added over a large number of bridges. If the bridges were set in urbanized areas, the production of electricity would be located close to its consumption, according to the smart grid requirements, and the hydrological basin at the bridge section (along with the corresponding discharge) would be greater than the basin of traditional plants located in more upstream locations. The maximum water level to be attained in the upstream section of the bridge should be the minimum among the following ones: 1) the level corresponding to the maximum flood allowed by the surrounding infra-structures, 2) the level corresponding to the maximum force allowed by the bridge structures. The resulting upstream water level hydrographs should be compatible with the river suspended and bed load equilibrium and with the requirement of the aquatic living population. The system should include a mechanism able to raise the turbine completely out of the water level, if required, for maintenance or other purposes. The complete lifting of the turbine could be used to: a) reconstruct the natural river bed profile during floods, b) allow the navigation or fish movements during some periods of the year, or even some hours of the day. A

  20. Hydropower Production in Future Climate Scenarios; the Case for the Zambezi River

    Directory of Open Access Journals (Sweden)

    Byman H. Hamududu

    2016-06-01

    Full Text Available Climate change remains a threat to water resources projects in southern Africa where impacts resulting from changes in climate are projected to be negative and worse than in most other regions of the world. This work presents an assessment of the impacts of climate change on water resources and hydropower production potential in the Zambezi River Basin. Future climate scenarios projected through the five General Circulation Model (GCM outputs are used as input in the impact assessment. The future projected climate scenarios are downscaled to find local and regional changes, and used in the Hydrologiska Byråns Vattenbalansavdelning (HBV hydrological model to assess climate change impacts on water resources in the river basin. According to the simulations, air temperature and potential evaporation are projected to increase, while rainfall is projected to decrease. The Zambezi hydropower system is likely to be affected negatively as a result of future climate changes. Increasing air temperature leading to increased evaporation, and reduced rainfall, both contribute to a decrease in resulting river flows and increased reservoir evaporation. Consequently, the decrease in water resources will lead to decreased hydropower production potential, by 9% in 2020s, 18% in 2050s and 28% in 2080s in the hydropower system, for a medium emission scenario, A1B.

  1. Hydropower Production and Fish Habitat Suitability: Impact and Effectiveness of Environmental Flow Prescriptions

    Science.gov (United States)

    Ceola, Serena; Pugliese, Alessio; Galeati, Giorgio; Castellarin, Attilio

    2017-04-01

    The anthropogenic alteration of the natural flow regime of a river for hydropower production can significantly modify the processes and functions associated with fluvial ecosystems. In order to preserve the fluvial habitat downstream of dams and diversion structures, environmental flows are commonly defined. Such environmental flows are generally computed from empirical methodologies, which are seldom based on site-specific studies, and may not be representative of local ecological and hydraulic conditions. Here we present the results of a quantitative analysis on the effectiveness of two alternative environmental flow scenarios prescribed in Central Italy (time-invariant experimental and empirically-based flow release versus time-variant hydrogeomorphologically-based flow release) and their impact on hydropower production and fish habitat suitability. The latter is examined by means of several models of habitat suitability curve, which is a well-known approach capable of analysing fluvial species preferences as a function of key eco-hydraulic features, such as water depth, flow velocity and river substrate. The results show an evident loss of hydropower production moving from the time-invariant experimental flow release to the hydrogeomorphological one (nearly 20% at the annual scale). Concerning the effects in terms of fish habitat suitability, our outcomes are less obvious, since they are species- and life stage-specific. The proposed analysis, which can be easily adapted to different riparian habitats and hydrological contexts, is a useful tool to guide the derivation of optimal water resource management strategies in order to ensure both hydropower production and fluvial ecosystem protection.

  2. Comparing effects of oligotrophication and upstream hydropower dams on plankton and productivity in perialpine lakes

    Science.gov (United States)

    Finger, David; Schmid, Martin; Wüest, Alfred

    2007-12-01

    In recent decades, many perialpine lakes have been affected by oligotrophication due to efficient sewage treatment and by altered water turbidity due to upstream hydropower operations. Such simultaneous environmental changes often lead to public debate on the actual causes of observed productivity reductions. We evaluate the effects of those two changes by a combined approach of modeling and data interpretation for a case study on Lake Brienz (Switzerland), a typical oligotrophic perialpine lake, located downstream of several hydropower reservoirs. A physical k-ɛ scheme and a biogeochemical advection-diffusion-reaction model were implemented and applied for several hypothetical scenarios with different nutrient loads and different particle input dynamics. The simulation results are compared to long-term biotic data collected from 1999 to 2004. The analysis shows that enhanced nutrient supply increases the nutritious value of algae, stimulating zooplankton growth, while phytoplankton growth is limited by stronger top-down control. Annually integrated productivity is only slightly influenced by altered turbidity, as phosphorous limitation prevails. Simulations indicate that the spring production peak is delayed because of increased turbidity in winter caused by upstream hydropower operation. As a consequence, the entire nutrient cycle is seasonally delayed, creating an additional stress for zooplankton and fish in the downstream lake.

  3. Swiss hydropower production. Optimisation potentials in European electricity trading; Die Schweizer Wasserkrafterzeugung. Optimierungspotenziale im europaeischen Stromhandel

    Energy Technology Data Exchange (ETDEWEB)

    Pieper, Thomas; Laue, Dirk Simon [RWE Supply and Trading GmbH, Essen (Germany)

    2011-10-15

    Swiss hydropower plays a central role in the formation of electricity prices in Western Europe as well as in cross-border electricity transmission. Although subject to constraints relating to hydrology as well as energy economy, its inherent flexibility makes it possible to make use of the most profitable electricity price differences relative to neighbouring European electricity markets (referred to as location spreads), especially between France and Italy. In times of favourable framework conditions it is also possible to use location spread potentials in relation to Germany. Studies in electricity statistics permit analysis of cross-border transmission schedules and spot price differences as well as identification of behavioural patterns in history and thus of optimisation potentials of Swiss hydropower production.

  4. Hydropower annual report 2003

    Energy Technology Data Exchange (ETDEWEB)

    Cada, Glenn F. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Carlson, Thomas J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Dauble, Dennis D. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Hunt, Richard T. [Idaho National Lab. (INL), Idaho Falls, ID (United States). Idaho National Engineering Lab. (INEL); Sale, Michael J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Sommers, Garold L. [Idaho National Lab. (INL), Idaho Falls, ID (United States). Idaho National Engineering Lab. (INEL)

    2004-02-01

    This report describes hydropower activities supported by the U.S. Department of Energy (DOE) Wind and Hydropower Program during Fiscal Year 2003 (October 1, 2002 to September 30, 2003). Background on the program, FY03 accomplishments, and future plans are presented in the following sections.

  5. Biofuel Crops Expansion: Evaluating the Impact on the Agricultural Water Scarcity Costs and Hydropower Production with Hydro Economic Modeling

    Science.gov (United States)

    Marques, G.

    2015-12-01

    Biofuels such as ethanol from sugar cane remain an important element to help mitigate the impacts of fossil fuels on the atmosphere. However, meeting fuel demands with biofuels requires technological advancement for water productivity and scale of production. This may translate into increased water demands for biofuel crops and potential for conflicts with incumbent crops and other water uses including domestic, hydropower generation and environmental. It is therefore important to evaluate the effects of increased biofuel production on the verge of water scarcity costs and hydropower production. The present research applies a hydro-economic optimization model to compare different scenarios of irrigated biofuel and hydropower production, and estimates the potential tradeoffs. A case study from the Araguari watershed in Brazil is provided. These results should be useful to (i) identify improved water allocation among competing economic demands, (ii) support water management and operations decisions in watersheds where biofuels are expected to increase, and (iii) identify the impact of bio fuel production in the water availability and economic value. Under optimized conditions, adoption of sugar cane for biofuel production heavily relies on the opportunity costs of other crops and hydropower generation. Areas with a lower value crop groups seem more suitable to adopt sugar cane for biofuel when the price of ethanol is sufficiently high and the opportunity costs of hydropower productions are not conflicting. The approach also highlights the potential for insights in water management from studying regional versus larger scales bundled systems involving water use, food production and power generation.

  6. Exploring the impact of co-varying water availability and energy price on productivity and profitability of Alpine hydropower

    Science.gov (United States)

    Anghileri, Daniela; Botter, Martina; Castelletti, Andrea; Burlando, Paolo

    2016-04-01

    Alpine hydropower systems are experiencing dramatic changes both from the point of view of hydrological conditions, e.g., water availability and frequency of extremes events, and of energy market conditions, e.g., partial or total liberalization of the market and increasing share of renewable power sources. Scientific literature has, so far, mostly focused on the analysis of climate change impacts and associated uncertainty on hydropower operation, underlooking the consequences that socio-economic changes, e.g., energy demand and/or price changes, can have on hydropower productivity and profitability. In this work, we analyse how hydropower reservoir operation is affected by changes in both water availability and energy price. We consider stochastically downscaled climate change scenarios of precipitation and temperature to simulate reservoir inflows using a physically explicit hydrological model. We consider different scenarios of energy demand and generation mix to simulate energy prices using an electricity market model, which includes different generation sources, demand sinks, and features of the transmission lines. We then use Multi-Objective optimization techniques to design the operation of hydropower reservoirs for different purposes, e.g. maximization of revenue and/or energy production. The objective of the work is to assess how the tradeoffs between the multiple operating objectives evolve under different co-varying climate change and socio-economic scenarios and to assess the adaptive capacity of the system. The modeling framework is tested on the real-world case study of the Mattmark reservoir in Switzerland.

  7. Hydropower research and development

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    This report is a compilation of information on hydropower research and development (R and D) activities of the Federal government and hydropower industry. The report includes descriptions of on-going and planned R and D activities, 1996 funding, and anticipated future funding. Summary information on R and D projects and funding is classified into eight categories: fish passage, behavior, and response; turbine-related; monitoring tool development; hydrology; water quality; dam safety; operations and maintenance; and water resources management. Several issues in hydropower R and D are briefly discussed: duplication; priorities; coordination; technical/peer review; and technology transfer/commercialization. Project information sheets from contributors are included as an appendix.

  8. Hydropower's future, the environment, and global electricity systems

    Energy Technology Data Exchange (ETDEWEB)

    Sternberg, R. [Department of Earth and Environmental Studies, Montclair State University, 1 Normal Ave, Montclair, NJ 07043-1624 (United States)

    2010-02-15

    Hydropower is a well established electricity system on the global scene. Global electricity needs by far exceed the amount of electricity that hydrosystems can provide to meet global electricity needs. Much of the world's hydropower remains to be brought into production. Improved technology, better calibrated environmental parameters for large projects have become the norm in the past 15 years. How and why does hydropower retain a prominent role in electricity production? How and why does hydropower find social acceptance in diverse social systems? How does hydropower project planning address issues beyond electricity generation? How does the systems approach to hydropower installations further analysis of comparative energy sources powering electricity systems? Attention to the environmental impact of hydropower facilities forms an integral part of systems analysis. Similarly, the technical, political and economic variables call for balanced analysis to identify the viability status of hydro projects. Economic competition among energy systems requires in context assessments as these shape decision making in planning of hydropower systems. Moreover, technological change has to be given a time frame during which the sector advances in productivity and share in expanding electricity generation. The low production costs per kWh assure hydropower at this juncture, 2009, a very viable future. (author)

  9. Product Life Cycle Planning

    National Research Council Canada - National Science Library

    Walaszek, Jeffrey

    2003-01-01

    .... This phase of work was undertaken to: (1) provide guidelines, technical support, and planning approaches for researchers that result in realistic life cycle plans for products emerging from the RSM...

  10. Technology Roadmap: Hydropower

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2012-07-01

    Hydropower could double its contribution by 2050, reaching 2,000 GW of global capacity and over 7,000 TWh. This achievement, driven primarily by the quest of clean electricity, could prevent annual emissions of up to 3 billion tonnes of CO2 from fossil-fuel plants. The bulk of this growth would come from large plants in emerging economies and developing countries. Hydroelectricity’s many advantages include reliability, proven technology, large storage capacity, and very low operating and maintenance costs. Hydropower is highly flexible, a precious asset for electricity network operators, especially given rapid expansion of variable generation from other renewable energy technologies such as wind power and photovoltaics. Many hydropower plants also provide flood control, irrigation, navigation and freshwater supply. The technology roadmap for Hydropower details action needed from policy makers to allow hydroelectric production to double, and addresses necessary conditions, including resolving environmental issues and gaining public acceptance.

  11. Soybean Production Lesson Plan.

    Science.gov (United States)

    Carlson, Keith R.

    These lesson plans for teaching soybean production in a secondary or postsecondary vocational agriculture class are organized in nine units and cover the following topics: raising soybeans, optimum tillage, fertilizer and lime, seed selection, pest management, planting, troubleshooting, double cropping, and harvesting. Each lesson plan contains…

  12. Complementing hydropower with PV and wind: optimal energy mix in a fully renewable Switzerland

    Science.gov (United States)

    Dujardin, Jérôme; Kahl, Annelen; Kruyt, Bert; Lehning, Michael

    2017-04-01

    Like several other countries, Switzerland plans to phase out its nuclear power production and will replace most or all of it by renewables. Switzerland has the chance to benefit from a large hydropower potential and has already exploited almost all of it. Currently about 60% of the Swiss electricity consumption is covered by hydropower, which will eventually leave a gap of about 40% to the other renewables mainly composed of photovoltaics (PV) and wind. With its high flexibility, storage hydropower will play a major role in the future energy mix, providing valuable power and energy balance. Our work focuses on the interplay between PV, wind and storage hydropower, to analyze the dynamics of this complex system and to identify the best PV-wind mixing ratio. Given the current electricity consumption and the currently installed pumping capacity of the storage hydropower plants, it appears that the Swiss hydropower system can completely alleviate the intermittency of PV and wind. However, some seasonal mismatch between production and demand will remain, but we show that oversizing the production from PV and wind or enlarging the reservoir capacity can be a solution to keep it to an acceptable level or even eliminate it. We found that PV, wind and hydropower performs the best together when the share of PV in the solar - wind mix is between 20 and 60%. These findings are quantitatively specific for Switzerland but qualitatively transferable to similar mountainous environments with abundant hydropower resources.

  13. Trade-offs Between Electricity Production from Small Hydropower Plants and Ecosystem Services in Alpine River Basins

    Science.gov (United States)

    Meier, Philipp; Schwemmle, Robin; Viviroli, Daniel

    2015-04-01

    The need for a reduction in greenhouse gas emissions and the decision to phase out nuclear power plants in Switzerland and Germany increases pressure to develop the remaining hydropower potential in Alpine catchments. Since most of the potential for large reservoirs is already exploited, future development focusses on small run-of-the-river hydropower plants (SHP). Being considered a relatively environment-friendly electricity source, investment in SHP is promoted through subsidies. However, SHP can have a significant impact on riverine ecosystems, especially in the Alpine region where residual flow reaches tend to be long. An increase in hydropower exploitation will therefore increase pressure on ecosystems. While a number of studies assessed the potential for hydropower development in the Alps, two main factors were so far not assessed in detail: (i) ecological impacts within a whole river network, and (ii) economic conditions under which electricity is sold. We present a framework that establishes trade-offs between multiple objectives regarding environmental impacts, electricity production and economic evaluation. While it is inevitable that some ecosystems are compromised by hydropower plants, the context of these impacts within a river network should be considered when selecting suitable sites for SHP. From an ecological point of view, the diversity of habitats, and therefore the diversity of species, should be maintained within a river basin. This asks for objectives that go beyond lumped parameters of hydrological alteration, but also consider habitat diversity and the spatial configuration. Energy production in run-of-the-river power plants depends on available discharge, which can have large fluctuations. In a deregulated electricity market with strong price variations, an economic valuation should therefore be based on the expected market value of energy produced. Trade-off curves between different objectives can help decision makers to define policies

  14. Small run-of-river hydropower: tradeoff among energy production, profitability and hydrologic impact

    Science.gov (United States)

    Basso, S.; Lazzaro, G.; Schirmer, M.; Botter, G.

    2013-12-01

    Energy production by run-of-river hydropower plants strongly depends on the availability and temporal variability of streamflows. Due to the absence of a reservoir, the selection of the plant capacity is a key step to reach an efficient exploitation of the available water resources, and it should rest on a characterization of the variability of river flows as well as on economic issues. In this work we propose an analytical framework to identify the capacity which maximizes the produced energy or the economic profitability of small run-of-river power plants, explicitly taking into account the streamflow variability and the management strategies used to operate the plants. The framework allows for an assessment of the gap between the economic and energy optimizations of these plants and of the effectiveness of policies aimed at its reduction. In order to consider also the value linked to protection or restoration of riverine processes and habitats, which could be heavily impacted by small run-of-river plants built in cascade along the same river reach, the alteration of the hydrologic regime between the intake and the outflow of the plant is expressed as a function of the natural regime. Two alternative withdrawal strategies (the commonly used minimum flow discharge and the percent-of-flow approaches) are analyzed and the resulting hydrologic disturbances and economic profitabilities are compared by using a set of synthetic indices. The application to three case studies in the Alps proves the framework to be a valuable tool to assess the ability of water management strategies to trade between hydrologic disturbance and anthropogenic uses of fresh water and to identify incentive policies promoting an efficient exploitation of water resources.

  15. Operational river ice forecasting on the Peace River : managing flood risk and hydropower production

    Energy Technology Data Exchange (ETDEWEB)

    Jasek, M. [BC Hydro, Burnaby, BC (Canada); Friensenhan, E. [Alberta Environment, Edmonton, AB (Canada); Granson, W. [Alberta Environment, Peace River, AB (Canada)

    2007-07-01

    This paper described the procedures used jointly by Alberta Environment and BC Hydro to manage the water flows on the Peace River. The Alberta-British Columbia Joint Task Force on Peace River Ice (JTF) was concerned with the coordination of break-up ice observations along the river as well as ice jam flooding at the Town of Peace River (TPR), resulting from an induced dynamic break-up on the Smoky River, a main tributary of the Peace River. The TPR is the largest community that can be most affected by ice jams on river. As such, river ice processes on the river are monitored and subject to operational procedures of the JTF. These operating procedures are organized into 3 separate sequential phases, notably freeze-up procedures, mid-winter procedures, and break-up procedures. In April 2007, the ice break-up season on the Peace River and Smoky River, was particularly challenging as record high snow cover led to a dynamic break-up of these two streams. Costs due to reduced hydropower production were documented. This paper highlighted the main decision points for mitigation and presented the recommendations that improve mitigation efforts with benefits to both the flood prone community and the power utility. This paper revealed that forecasting the start of control flow by predicting the arrival of the ice front using the Comprehensive River Ice Simulation System Project (CRISSP) model was largely successful. Further work is underway to define the accuracy of forecasting the start of control flow using CRISSP, as accuracy of temperature forecasts appears to be the major uncertainty. The JTF was able to make successful recommendations for flow reductions. However, the need for an accurate hydrologic model for the Smoky River as well as other inflows between Peace Canyon and the TPR was emphasized. 4 refs., 31 figs.

  16. Climate change and hydropower production in the Swiss Alps: quantification of potential impacts and related modelling uncertainties

    Directory of Open Access Journals (Sweden)

    2007-01-01

    Full Text Available This paper addresses two major challenges in climate change impact analysis on water resources systems: (i incorporation of a large range of potential climate change scenarios and (ii quantification of related modelling uncertainties. The methodology of climate change impact modelling is developed and illustrated through application to a hydropower plant in the Swiss Alps that uses the discharge of a highly glacierised catchment. The potential climate change impacts are analysed in terms of system performance for the control period (1961–1990 and for the future period (2070–2099 under a range of climate change scenarios. The system performance is simulated through a set of four model types, including the production of regional climate change scenarios based on global-mean warming scenarios, the corresponding discharge model, the model of glacier surface evolution and the hydropower management model. The modelling uncertainties inherent in each model type are characterised and quantified separately. The overall modelling uncertainty is simulated through Monte Carlo simulations of the system behaviour for the control and the future period. The results obtained for both periods lead to the conclusion that potential climate change has a statistically significant negative impact on the system performance.

  17. Hidroenergia 2010: International congress on small hydropower. Conference report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-07-01

    introduced and its target of improving water resource management was discussed. An assessment of the potential for small hydropower in Switzerland was presented. Further topics discussed included challenges faced in environmental management in Norway, the use of telemetric data for flood management in Thailand, the refurbishment of a small hydro scheme in western Switzerland, the realisation of the Alpbach small hydropower plant station in Kandersteg, Switzerland, the refurbishment of the Rivaz Mill small hydro installation in the vineyards along the Lake of Geneva, Switzerland and the development of a new turbine for very low heads and with low environmental impact. On the second day of the congress, four sessions and a workshop were held. The first set of parallel sessions covered multi-purpose hydro schemes such as the Chievo project on the Adige river in Italy, experience gained at the Boshava scheme in Macedonia and the development of a new tubular propeller. In the second, parallel set of presentations, technical innovations and engineering solutions were looked at. The use of computational fluid design (CFD) in the design of a diagonal turbine, the Ashlu Creek energy dissipation system in British Columbia, the planning of the two Asiganga tandem installations in the Himalayas and performance tests of hydraulic units in low-head small hydropower installations in Poland were discussed. In the second set of parallel sessions the following topics were discussed: The dynamic effects of small hydropower plants and experience gained with the design of small power plants. Finally, the ASEAN Hycom competence centre in Indonesia was presented. In the parallel session, the following topics were discussed: The Hydrobot remote survey of national hydropower resources, the 'Swissrivers' tool for the prediction of mini-hydropower production in Switzerland, increasing energy-efficiency by the use of artificial intelligence, the optimisation of a hydropower project using a

  18. Balancing power production and instream flow regime for small scale hydropower

    Science.gov (United States)

    Perona, P.; Gorla, L.; Characklis, G. W.

    2013-12-01

    Flow diversion from river and torrent main stems is a common practice to feed water uses such run-of-river and mini-hydropower, irrigation, etc. Considering the worldwide increasing water demand, it becomes mandatory to take the importance of riparian ecosystems and related biodiversity into account before starting such practices. In this paper, we use a simple hydro-economic model (Perona et al., 2013, Gorla and Perona, 2013) to show that redistribution policies at diversion nodes allow for a clear bio-economic interpretation of residual flows. This model uses the Principle of Equal Marginal Utility (PEMU) as optimal water allocation rule for generating natural-like flow releases while maximizing the aggregated economic benefits of both the riparian environment and the traditional use (e.g., hydropower). We show that both static and dynamic release polices such Minimal Flow, and Proportional/Non-proportional Repartitions, respectively, can all be represented in terms of PEMU, making explicit the value of the ecosystem health underlying each policy. The related ecological and economical performances are evaluated by means of hydrological/ecological indicators. We recommend taking this method into account as a helpful tool guiding political, economical and ecological decisions when replacing the inadequate concept of Minimum Flow Requirement (MFR) with dynamic ones. References Perona, P., D. Dürrenmatt and G. Characklis (2013) Obtaining natural-like flow releases in diverted river reaches from simple riparian benefit economic models. Journal of Environmental Management, 118: 161-169, http://dx.doi.org/10.1016/j.jenvman.2013.01.010 Gorla, L. and P. Perona (2013) On quantifying ecologically sustainable flow releases in a diverted river reach. Journal of Hydrology, 489: 98- 107, http://dx.doi.org/10.1016/j.jhydrol.2013.02.043

  19. Office of Renewable Energy Technology Geothermal and Hydropower Technologies Division, FY 1983 Annual Operating Plan

    Energy Technology Data Exchange (ETDEWEB)

    None

    1983-01-01

    There are between 700 and 3400 guads of recoverable geothermal energy in the US. Hydrothermal, geopressure and hot dry rock are the three principal types of geothermal resources (in order of technological readiness) which can supply large amounts of energy for electric power production and direct heat applications. Hydrothermal resources include water and steam trapped in fractured or porous rocks. A hydrothermal system is classified as either hot-water or vapor-dominated (steam), according to the principal physical state of the fluid. Geopressured resources consist of water at moderately high temperatures at pressures higher than normal hydrostatic pressure. This water contains dissolved methane. Geopressured sources in sedimentary formations along the Texas and Louisiana Gulf Coast are believed to be quite large. Geopressured formations also exist in sedimentary basins elsewhere in the US. Hot dry rock resources consist of relatively unfractured and unusually hot rocks at accessible depths that contain little or no water. To extract usable power from hot dry rock, the rock must be fractured and a confined fluid circulation system created. A heat transfer fluid is introduced, circulated, and withdrawn. The overall goal of the Geothermal Program is to build a technology base that will be used by the private sector to exploit geothermal resources which can supply large amounts of energy for electric power production and direct-heat applications.

  20. Advanced Production Planning Models

    Energy Technology Data Exchange (ETDEWEB)

    JONES,DEAN A.; LAWTON,CRAIG R.; KJELDGAARD,EDWIN A.; WRIGHT,STEPHEN TROY; TURNQUIST,MARK A.; NOZICK,LINDA K.; LIST,GEORGE F.

    2000-12-01

    >This report describes the innovative modeling approach developed as a result of a 3-year Laboratory Directed Research and Development project. The overall goal of this project was to provide an effective suite of solvers for advanced production planning at facilities in the nuclear weapons complex (NWC). We focused our development activities on problems related to operations at the DOE's Pantex Plant. These types of scheduling problems appear in many contexts other than Pantex--both within the NWC (e.g., Neutron Generators) and in other commercial manufacturing settings. We successfully developed an innovative and effective solution strategy for these types of problems. We have tested this approach on actual data from Pantex, and from Org. 14000 (Neutron Generator production). This report focuses on the mathematical representation of the modeling approach and presents three representative studies using Pantex data. Results associated with the Neutron Generator facility will be published in a subsequent SAND report. The approach to task-based scheduling described here represents a significant addition to the literature for large-scale, realistic scheduling problems in a variety of production settings.

  1. Methane and carbon dioxide production in soils flooded by the Belo Monte hydropower reservoir in the Amazon Basin, Brazil

    Science.gov (United States)

    Sawakuchi, H. O.; Bertassoli, D. J., Jr.; Silveira, A. M.; Bozi, B. S.; de Jesus, J. S.; Sawakuchi, A. O.; Ward, N. D.; Bastviken, D.; Krusche, A. V.; Richey, J. E.

    2016-12-01

    The Xingu River, one of the major tributary of the Amazon River, was recently impounded by the Belo Monte dam, a massive and controversial hydropower plant that will become the third biggest power station in generating capacity of the world. Given the limited data associated with greenhouse gas emissions from reservoirs in the Amazon basin, the impacts of hydroelectric expansion in this region to the global carbon budget remains unclear. Here, we used a bottom-up assessment to quantify a fraction of the possible emissions associated with the Belo Monte reservoir. Eighteen soil samples were collected before the impoundment from seven different locations and depths in areas that were going to be permanently flooded by the reservoir (forests and pasturelands). Soil samples were split in triplicates and incubated in anoxic conditions during two phases totaling 160 days of anoxic incubation in order to quantify the potential methane and carbon dioxide production through time. Our results showed that pasturelands soil presented higher potential production of both gases in relation to the soils from forested areas, reaching up to 0.072 mg CH4 g-¹d-1 and 0.078 mg CO2 g-¹d-1 during the first period of 65 days in the first phase of incubations. Significant differences in production were also noted through soil depth and time. In several areas, the first 15 cm of soil generated 99% of the methane volume that was being produced in the 60 cm sampled profile. The first 65 days of the second phase of incubations showed production that was 35% (CH4) and 44% (CO2) lower than the same period in the first stage. Extrapolations towards the total flooded area demonstrates that 27.3-43.3 ton CH4 d-1 may be generated from flooded soils in the Belo Monte reservoir during only the first several months of flooding, maintaining significant production rates during upcoming months as long as favorable conditions are maintained.

  2. Framing hydropower as green energy: assessing drivers, risks and tensions in the Eastern Himalayas

    NARCIS (Netherlands)

    Ahlers, R.; Budds, J.; Joshi, D.; Verme, V.; Zwarteveen, M.Z.

    2015-01-01

    The culturally and ecologically diverse region of the Eastern Himalayas is the target of ambitious hydropower development plans. Policy discourses at national and international levels position this development as synergistically positive: it ombines the production of clean energy to fuel economic

  3. Framing hydropower as green energy: assessing drivers, risks and tensions in the Eastern Himalayas

    NARCIS (Netherlands)

    Ahlers, R.; Budds, J.; Joshi, D.; Merme, V.; Zwarteveen, M.

    2015-01-01

    The culturally and ecologically diverse region of the Eastern Himalayas is the target of ambitious hydropower development plans. Policy discourses at national and international levels position this development as synergistically positive: it combines the production of clean energy to fuel economic

  4. Framing hydropower as green energy: assessing drivers, risks and tensions in the Eastern Himalayas

    NARCIS (Netherlands)

    Ahlers, R.; Budds, J.; Joshi, D.; Merme, V.; Zwarteveen, M.Z.

    2014-01-01

    The culturally and ecologically diverse region of the Eastern Himalayas is the target of ambitious hydropower development plans. Policy discourses at national and international levels position this development as synergistically positive: it combines the production of clean energy to fuel economic

  5. Hydropower Baseline Cost Modeling

    Energy Technology Data Exchange (ETDEWEB)

    O' Connor, Patrick W. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Zhang, Qin Fen [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); DeNeale, Scott T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Chalise, Dol Raj [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Centurion, Emma E. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2015-01-01

    Recent resource assessments conducted by the United States Department of Energy have identified significant opportunities for expanding hydropower generation through the addition of power to non-powered dams and on undeveloped stream-reaches. Additional interest exists in the powering of existing water resource infrastructure such as conduits and canals, upgrading and expanding existing hydropower facilities, and the construction new pumped storage hydropower. Understanding the potential future role of these hydropower resources in the nation’s energy system requires an assessment of the environmental and techno-economic issues associated with expanding hydropower generation. To facilitate these assessments, this report seeks to fill the current gaps in publically available hydropower cost-estimating tools that can support the national-scale evaluation of hydropower resources.

  6. Hydropower versus irrigation—an analysis of global patterns

    Science.gov (United States)

    Zeng, Ruijie; Cai, Ximing; Ringler, Claudia; Zhu, Tingju

    2017-03-01

    Numerous reservoirs around the world provide multiple flow regulation functions; key among these are hydroelectricity production and water releases for irrigation. These functions contribute to energy and food security at national, regional and global levels. While reservoir operations for hydroelectricity production might support irrigation, there are also well-known cases where hydroelectricity production reduces water availability for irrigated food production. This study assesses these relationships at the global level using machine-learning techniques and multi-source datasets. We find that 54% of global installed hydropower capacity (around 507 thousand Megawatt) competes with irrigation. Regions where such competition exists include the Central United States, northern Europe, India, Central Asia and Oceania. On the other hand, 8% of global installed hydropower capacity (around 79 thousand Megawatt) complements irrigation, particularly in the Yellow and Yangtze River Basins of China, the East and West Coasts of the United States and most river basins of Southeast Asia, Canada and Russia. No significant relationship is found for the rest of the world. We further analyze the impact of climate variables on the relationships between hydropower and irrigation. Reservoir flood control functions that operate under increased precipitation levels appear to constrain hydroelectricity production in various river basins of the United States, South China and most basins in Europe and Oceania. On the other hand, increased reservoir evaporative losses and higher irrigation requirements due to higher potential evaporation levels may lead to increased tradeoffs between irrigation and hydropower due to reduced water availability in regions with warmer climates, such as India, South China, and the Southern United States. With most reservoirs today being built for multiple purposes, it is important for policymakers to understand and plan for growing tradeoffs between key

  7. 2014 Hydropower Market Report

    Energy Technology Data Exchange (ETDEWEB)

    Rocío Uría-Martínez, Patrick W. O’Connor, Megan M. Johnson

    2015-04-30

    The U.S. hydropower fleet has been providing clean, reliable power for more than a hundred years. However, no systematic documentation exists of the U.S. fleet and the trends influencing it in recent years. This first-ever Hydropower Market Report seeks to fill this gap and provide industry and policy makers with a quantitative baseline on the distribution, capabilities, and status of hydropower in the United States.

  8. Hydropower development in India

    Energy Technology Data Exchange (ETDEWEB)

    Saxena, Praveen [Govt. of India, New Delhi (India). Ministry of New and Renewable Energy], E-mail: psaxena_98@yahoo.com; Kumar, Arun [Indian Institute of Technology Roorkee, Uttarakhand (India). Alternate Hydro Energy Centre], E-mail: aheciitr@gmail.com

    2011-04-15

    India is posed for large deployment of hydropower in present conducive policy and investment environment. Growing energy demand and concern for carbon emission is making hydropower development more favorable. The Government of India is ensuring a good performance of the new SHP stations by linking the incentives to the SHP developers with the performance of the station. (author)

  9. Quantifying the Value of Hydropower in the Electric Grid: Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Key, T. [Electric Power Research Inst. (EPRI), Knovville, TN (United States); Rogers, L. [Electric Power Research Inst. (EPRI), Knovville, TN (United States); Brooks, D. [Electric Power Research Inst. (EPRI), Knovville, TN (United States); Tuohy, A. [Electric Power Research Inst. (EPRI), Knovville, TN (United States)

    2012-12-31

    The report summarizes research to Quantify the Value of Hydropower in the Electric Grid. This 3-year DOE study focused on defining value of hydropower assets in a changing electric grid. Methods are described for valuation and planning of pumped storage and conventional hydropower. The project team conducted plant case studies, electric system modeling, market analysis, cost data gathering, and evaluations of operating strategies and constraints. Five other reports detailing these research results are available a project website, www.epri.com/hydrogrid. With increasing deployment of wind and solar renewable generation, many owners, operators, and developers of hydropower have recognized the opportunity to provide more flexibility and ancillary services to the electric grid. To quantify value of services, this study focused on the Western Electric Coordinating Council region. A security-constrained, unit commitment and economic dispatch model was used to quantify the role of hydropower for several future energy scenarios up to 2020. This hourly production simulation considered transmission requirements to deliver energy, including future expansion plans. Both energy and ancillary service values were considered. Addressing specifically the quantification of pumped storage value, no single value stream dominated predicted plant contributions in various energy futures. Modeling confirmed that service value depends greatly on location and on competition with other available grid support resources. In this summary, ten different value streams related to hydropower are described. These fell into three categories; operational improvements, new technologies, and electricity market opportunities. Of these ten, the study was able to quantify a monetary value in six by applying both present day and future scenarios for operating the electric grid. This study confirmed that hydropower resources across the United States contribute significantly to operation of the grid in terms

  10. New Production Reactors Program Plan

    Energy Technology Data Exchange (ETDEWEB)

    1990-12-01

    Part I of this New Production Reactors (NPR) Program Plan: describes the policy basis of the NPR Program; describes the mission and objectives of the NPR Program; identifies the requirements that must be met in order to achieve the mission and objectives; and describes and assesses the technology and siting options that were considered, the Program's preferred strategy, and its rationale. The implementation strategy for the New Production Reactors Program has three functions: Linking the design, construction, operation, and maintenance of facilities to policies requirements, and the process for selecting options. The development of an implementation strategy ensures that activities and procedures are consistent with the rationale and analysis underlying the Program. Organization of the Program. The strategy establishes plans, organizational structure, procedures, a budget, and a schedule for carrying out the Program. By doing so, the strategy ensures the clear assignment of responsibility and accountability. Management and monitoring of the Program. Finally, the strategy provides a basis for monitoring the Program so that technological, cost, and scheduling issues can be addressed when they arise as the Program proceeds. Like the rest of the Program Plan, the Implementation Strategy is a living document and will be periodically revised to reflect both progress made in the Program and adjustments in plans and policies as they are made. 21 figs., 5 tabs.

  11. Impacts of climate change on water resources and hydropower systems in central and southern Africa

    Energy Technology Data Exchange (ETDEWEB)

    Hamududu, Byman H.

    2012-11-15

    Climate change is altering hydrological processes with varying degrees in various regions of the world. This research work investigates the possible impacts of climate change on water resource and Hydropower production potential in central and southern Africa. The Congo, Zambezi and Kwanza, Shire, Kafue and Kabompo basins that lie in central and southern Africa are used as case studies. The review of climate change impact studies shows that there are few studies on impacts of climate change on hydropower production. Most of these studies were carried out in Europe and north America and very few in Asia, south America and Africa. The few studies indicate that southern Africa would experience reduction in precipitation and runoff, consequently reductions in hydropower production. There are no standard methods of assessing the resulting impacts. Two approaches were used to assess the impacts of climate change on water resources and hydropower. One approach is lumping changes on country or regional level and use the mean climate changes on mean annual flows as the basis for regional changes in hydropower production. This is done to get an overall picture of the changes on global and regional level. The second approach is a detailed assessment process in which downscaling, hydrological modelling and hydropower simulations are carried out. The possible future climate scenarios for the region of central and southern Africa depicted that some areas where precipitation are likely to have increases while other, precipitation will reduce. The region northern Zambia and southern Congo showed increases while the northern Congo basin showed reductions. Further south in southern African region, there is a tendency of decreases in precipitation. To the west, in Angola, inland showed increases while towards the coast highlighted some decreases in precipitation. On a global scale, hydropower is likely to experience slight changes (0.08%) due to climate change by 2050. Africa is

  12. RI production plan using JMTR

    Energy Technology Data Exchange (ETDEWEB)

    Hori, Nao Hiko; Izumo, Hironobu; Kanno, Masaru; Nakagawa, Tetsuya; Kawamura, Hiro Shi [Japan Atomic Energy Agency, Ibaraki Ken (Japan)

    2008-11-15

    At Oarai Research and Development Center, Japan Atomic Energy Agency (JAEA) is advancing the plan of refurbishing Japan Materials Testing Reactor (JMTR) to start the operation from FY 2011. At the JMTR, the iridium-192 ({sup 192}Ir) source for the medical treatment as well as for the industrial using in the non destructive inspection has been irradiated. As one of effective use of the renewed JMTR, JAEA has a plan to product molybdenum-99 ({sup 99}Mo), a parent nuclide of technetium-99 ({sup 99m}Tc). {sup 99m}Tc is most commonly used as a radiopharmaceutical in the field of nuclear medicine. Furthermore, production of radioisotope (RI) for which increasing demand is expected, e.g. rhenium-188 ({sup 188}Re) which being expected as a cancer treatment medicine.

  13. Hydropower Vision: Full Report

    Energy Technology Data Exchange (ETDEWEB)

    None, None

    2016-07-01

    Hydropower has provided clean, affordable, reliable, and renewable electricity in the United States for more than a century. Building on hydropower’s historical significance, and to inform the continued technical evolution, energy market value, and environmental performance of the industry, the U.S. Department of Energy’s (DOE’s) Wind and Water Power Technologies Office has led a first-of-its-kind comprehensive analysis focused on a set of potential pathways for the environmentally sustainable expansion of hydropower (hydropower generation and pumped storage) in the United States.

  14. Hydropower's Biogenic Carbon Footprint

    National Research Council Canada - National Science Library

    Scherer, Laura; Pfister, Stephan

    2016-01-01

    .... Little is known about the severity of their emissions at the global scale. Here we show that the carbon footprint of hydropower is far higher than previously assumed, with a global average of 173 kg CO2...

  15. Land Systems Impacts of Hydropower Development

    Science.gov (United States)

    Wu, G. C.; Torn, M. S.

    2016-12-01

    Hydropower is often seen as the low-cost, low-carbon, and high-return technology for meeting rising electricity demand and fueling economic growth. Despite the magnitude and pace of hydropower expansion in many developing countries, the potential land use and land cover change (LULCC), particularly indirect LULCC, resulting from hydropower development is poorly understood. Hydropower-driven LULCC can have multiple impacts ranging from global and local climate modification (e.g., increased extreme precipitation events or increased greenhouse gas emissions), ecosystem degradation and fragmentation, to feedbacks on hydropower generation (e.g., increased sedimentation of the reservoir). As a result, a better understanding of both direct and indirect LULCC impacts can inform a more integrated and low-impact model for energy planning in countries with transitioning or growing energy portfolios. This study uses multi-scale remote sensing imagery (Landsat, MODIS, fine-resolution commercial imagery) to estimate LULCC from past hydropower projects intended primarily for electricity generation in 12 countries in Africa, South and Central America, South Asia, and Southeast Asia. It is important to examine multiple locations to determine how socio-political and environmental context determines the magnitude of LULCC. Previous studies have called for the need to scale-up local case studies to examine "cumulative impacts" of multiple development activities within a watershed. We use a pre-test/post-test quasi-experimental design using a time series of classified images and vegetation indices before and after hydropower plant construction as the response variable in an interrupted time series regression analysis. This statistical technique measures the "treatment" effect of hydropower development on indirect LULCC. Preliminary results show land use change and landscape fragmentation following hydropower development, primarily agricultural and urban in nature. These results suggest

  16. Climate Change and Hydropower Challenges In Southern Africa ...

    African Journals Online (AJOL)

    The purpose of this study is to address climate change impacts that challenge hydropower production and distribution in southern Africa. Change in temperature and precipitations due to climate change will affect rivers catchments runoff as well as hydropower dams and transmission lines in southern Africa. Evidences of ...

  17. Framing hydropower as green energy: assessing drivers, risks and tensions in the Eastern Himalayas

    Science.gov (United States)

    Ahlers, R.; Budds, J.; Joshi, D.; Merme, V.; Zwarteveen, M.

    2015-04-01

    The culturally and ecologically diverse region of the Eastern Himalayas is the target of ambitious hydropower development plans. Policy discourses at national and international levels position this development as synergistically positive: it combines the production of clean energy to fuel economic growth at regional and national levels with initiatives to lift poor mountain communities out of poverty. Different from hydropower development in the 20th century in which development agencies and banks were important players, contemporary initiatives importantly rely on the involvement of private actors, with a prominent role of the private finance sector. This implies that hydropower development is not only financially viable but also understood as highly profitable. This paper examines the new development of hydropower in the Eastern Himalayas of Nepal and India. It questions its framing as green energy, interrogates its links with climate change, and examines its potential for investment and capital accumulation. To do this, we also review the evidence on the extent to which its construction and operation may modify existing hydrogeological processes and ecosystems, as well as its impacts on the livelihoods of diverse groups of people that depend on these. The paper concludes that hydropower development in the region is characterized by inherent contentions and uncertainties, refuting the idea that dams constitute development projects whose impacts can be simply predicted, controlled and mitigated. Indeed, in a highly complex geological, ecological, cultural and political context that is widely regarded to be especially vulnerable to the effects of climate change, hydropower as a development strategy makes for a toxic cocktail.

  18. Minimizing water consumption when producing hydropower

    Science.gov (United States)

    Leon, A. S.

    2015-12-01

    In 2007, hydropower accounted for only 16% of the world electricity production, with other renewable sources totaling 3%. Thus, it is not surprising that when alternatives are evaluated for new energy developments, there is strong impulse for fossil fuel or nuclear energy as opposed to renewable sources. However, as hydropower schemes are often part of a multipurpose water resources development project, they can often help to finance other components of the project. In addition, hydropower systems and their associated dams and reservoirs provide human well-being benefits, such as flood control and irrigation, and societal benefits such as increased recreational activities and improved navigation. Furthermore, hydropower due to its associated reservoir storage, can provide flexibility and reliability for energy production in integrated energy systems. The storage capability of hydropower systems act as a regulating mechanism by which other intermittent and variable renewable energy sources (wind, wave, solar) can play a larger role in providing electricity of commercial quality. Minimizing water consumption for producing hydropower is critical given that overuse of water for energy production may result in a shortage of water for other purposes such as irrigation, navigation or fish passage. This paper presents a dimensional analysis for finding optimal flow discharge and optimal penstock diameter when designing impulse and reaction water turbines for hydropower systems. The objective of this analysis is to provide general insights for minimizing water consumption when producing hydropower. This analysis is based on the geometric and hydraulic characteristics of the penstock, the total hydraulic head and the desired power production. As part of this analysis, various dimensionless relationships between power production, flow discharge and head losses were derived. These relationships were used to withdraw general insights on determining optimal flow discharge and

  19. Development potential for hydropower; Ausbaupotential der Wasserkraft

    Energy Technology Data Exchange (ETDEWEB)

    Laufer, F.; Groetzinger, S.; Peter, M.; Schmutz, A.

    2004-11-15

    This comprehensive report for the Swiss Federal Office of Energy (SFOE) takes a look at the potential for the development of hydropower in Switzerland. The report updates the energy perspectives made ten years earlier. An overview of Swiss electricity production and consumption is presented and the proportion provided by hydropower is noted. Figures on installed capacity and import/export quantities are presented and discussed. Technological developments and the economical frameworks involved are discussed, as are regulatory measures that can be taken. Theoretical and technically realisable potentials for increased use of hydropower are discussed. The methods used to do this are examined. Strategies and measures to be taken are listed and discussed. An appendix includes data sheets on power plant modelling, including examples

  20. Impacts of Climate Change on Regulated Streamflow, Hydrologic Extremes, Hydropower Production, and Sediment Discharge in the Skagit River Basin

    Science.gov (United States)

    Lee, Se-Yeun; Hamlet, Alan F.; Grossman, Eric E.

    2016-01-01

    Previous studies have shown that the impacts of climate change on the hydrologic response of the Skagit River are likely to be substantial under natural (i.e. unregulated) conditions. To assess the combined effects of changing natural flow and dam operations that determine impacts to regulated flow, a new integrated daily-time-step reservoir operations model was constructed for the Skagit River Basin. The model was used to simulate current reservoir operating policies for historical flow conditions and for projected flows for the 2040s (2030–2059) and 2080s (2070–2099). The results show that climate change is likely to cause substantial seasonal changes in both natural and regulated flow, with more flow in the winter and spring, and less in summer. Hydropower generation in the basin follows these trends, increasing (+ 19%) in the winter/ spring, and decreasing (- 29%) in the summer by the 2080s. The regulated 100-year flood is projected to increase by 23% by the 2040s and 49% by the 2080s. Peak winter sediment loading in December is projected to increase by 335% by the 2080s in response to increasing winter flows, and average annual sediment loading increases from 2.3 to 5.8 teragrams (+ 149%) per year by the 2080s. Regulated extreme low flows (7Q10) are projected to decrease by about 30% by the 2080s, but remain well above natural low flows. Both current and proposed alternative flood control operations are shown to be largely ineffective in mitigating increasing flood risks in the lower Skagit due to the distribution of flow in the basin during floods.

  1. Hydropower and its development

    Directory of Open Access Journals (Sweden)

    Janusz Steller

    2013-09-01

    Full Text Available Even if the documented history of hydropower reaches back as far as 5000 years ago, it owes its rapid acceleration in growth to the industrial revolution at the beginning of the nineteenth century. The end of the twentieth century brought about new challenges associated, on the one hand, with a growing demand for ancillary grid services, and on the other with new requirements for mitigating the environmental impact. Hydropower technology expansion had come about in a manner aiming to at least partially exploit the mechanical energy of sea and ocean waters. This study points out to the most important trends in and barriers to hydropower development, with particular focus on the situation in Poland. This author sees the main threats to Polish hydropower development in how it is perceived solely through the prism of the generation of a particular volume of green energy, and a total underestimation of the quality of electricity supply and the numerous non-energy benefits resulting from hydroelectric power plant operation.

  2. Development and practical testing of an action plan for the environmentally compatible use of hydropower; Erarbeitung und Praxiserprobung eines Massnahmenplanes zur oekologisch vertraeglichen Wasserkraftnutzung

    Energy Technology Data Exchange (ETDEWEB)

    Keuneke, Rita; Dumont, Ulrich [Ingenieurbuero Floecksmuehle, Aachen (Germany)

    2011-05-15

    The use of rivers for generating electric power and the efforts to conserve important ecological habitats mark a classic conflict between two different aims of society. While passing hydropower plants migrating fish risk injuries and death. This affects the development of fish populations, particularly of diadromous fish populations in river basins. The aim of this study was to find conditions for serving a self sustaining fish population in the Weser basin. The influence of the river continuity and the quality of spawning and nursery habitats were varied. The survival rates of the diadromous species salmon and eel were modeled on the basis of literature data and additional data from own investigations. A self-reproducing salmon population would require the upstream and downstream passibility at each obstacle. Especially the protection at hydropower plants in the tributaries is of major importance. In addition, the hydro-morphological conditions of the spawning habitats have to be improved and further losses (such as predation or fishing) must be decreased. The survival rate of 40%, required by the EC Regulation on European eel can be achieved by the establishment of upstream continuity at all sites and by protective measures at the hydropower plants in the tributaries of the Weser. (orig.)

  3. Sustainable Multi-Product Seafood Production Planning Under Uncertainty

    Science.gov (United States)

    Simanjuntak, Ruth; Sembiring, Monalisa; Sinaga, Rani; Pakpahan, Endang J.; Mawengkang, Herman

    2013-04-01

    A multi-product fish production planning produces simultaneously multi fish products from several classes of raw resources. The goal in sustainable production planning is to meet customer demand over a fixed time horizon divided into planning periods by optimizing the tradeoff between economic objectives such as production cost, waste processed cost, and customer satisfaction level. The major decisions are production and inventory levels for each product and the number of workforce in each planning period. In this paper we consider the management of small scale traditional business at North Sumatera Province which performs processing fish into several local seafood products. The inherent uncertainty of data (e.g. demand, fish availability), together with the sequential evolution of data over time leads the sustainable production planning problem to a nonlinear mixed-integer stochastic programming model. We use scenario generation based approach and feasible neighborhood search for solving the model.

  4. Product Family Modelling for Manufacturing Planning

    DEFF Research Database (Denmark)

    Jørgensen, Kaj Asbjørn; Petersen, Thomas Ditlev; Nielsen, Kjeld

    2011-01-01

    dependent on the specific assembly structure of the configured product, i.e. the combination of modules. In this paper, issues of how to create manufacturing structures and related planning data in product family models are presented. Primarily, the more complicated multi-level manufacturing structures......To enable product configuration of a product family, it is important to develop a model of the selected product family. From such a model, an often performed practice is to make a product configurator from which customers can specify individual products from the family. To get further utilisation...... of the product family model, however, the model should be enriched with data for planning and execution of the manufacturing processes. The idea is that, when any individual product is specified using the product configurator, a product model can be extracted with all data necessary for planning...

  5. New construction of the Kelchbach hydropower installation - Preliminary project; Vorprojekt Neubau Kraftwerk Kelchbach. Programm Kleinwasserkraftwerke - Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Kalbermatten, J.

    2009-09-15

    This final report for the Swiss Federal Office of Energy (SFOE) describes the preliminary project for the new construction of a small hydropower installation on the Kelchbach stream in Naters, Switzerland. After a pressure-pipe rupture, the old, over 100 year-old installation was closed down. The replacement installation is planned to increase power production. The works necessary for the realisation of this hydropower project are described and discussed. Several older studies on the replacement of the installation are listed. Three variants are presented and discussed as are hydrological data on the project. Cost estimates are presented and discussed. Estimates of energy production are also presented and discussed, as is the economic viability of the project. Environmental aspects of the project are also examined.

  6. Thayer Lake Hydropower Development -- Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Matousek, Mark [ORENCO Hydropower, Palo Alto, CA (United States)

    2017-06-30

    The Thayer Lake Hydropower Development (THLD) has been under study since the late 1970’s as Angoon explored opportunities to provide lower cost renewable power to the Community and avoid the high cost of diesel generation. Kootznoowoo Inc. (Kootznoowoo), the tribal corporation for Angoon’s current and past residents, was provided the rights by Congress to develop a hydropower project within the Admiralty Island National Monument. This grant (DE-EE0002504) by the Department of Energy’s (DOE’s) Office of Indian Energy and a matching grant from the Alaska Energy Authority (AEA) were provided to Kootznoowoo to enable the design, engineering and permitting of this hydropower project on Thayer Creek. Prior to the grant, the USFS had performed a final environmental impact statement (FEIS) and issued a Record of Decision (ROD) in 2009 for a 1.2 MW hydropower project on Thayer Creek that would Angoon’s needs with substantial excess capacity for growth. Kootznoowoo hired Alaska Power & Telephone (AP&T) in 2013 to manage this project and oversee its development. AP&T and its subcontractors under Kootznoowoo’s guidance performed several activities, aligned with the task plan defined in the grant.

  7. Multicriterion analysis of hydropower operation

    Energy Technology Data Exchange (ETDEWEB)

    Duckstein, L.; Hobbs, B.F. (Case Western Reserve Univ., Cleveland, OH (US)); Tecle, A. (School of Forestry, Northern Arizona Univ., Flagstaff, AZ (US)); Nachnebel, H.P. (Institute of Water Resources, Univ. fur Bodenkulur, Gregormendelstr. 33, 1180 Wien (AT))

    1989-12-01

    Two examples are presented to show how multicriterion decision-making (MCDM) techniques can help hydropower engineers mitigate the environmental and social effects of hydropower development and operation. A brief introduction and overview of MCDM is presented, consisting of an 11-step process that starts with problem definition and ends with implementation. A typology of MCDM is provided, dividing the techniques into three groups: outranking, distance-based, and value- or utility-based typed. The operation of the Upper Isar River project in Bavaria is analyzed by means of a value technique and an out-ranking technique called multicriterion Q-analysis. Fourteen criteria are considered in that study, including power production, habitat quality for four groups of species, aesthetics, several recreation indices, minimum flows, and phosphorus loadings. The case study of the Erlauf River Division in Austria is evaluated using a distance-based technique, called composite programming, combined with Monte Carlo simulation. An outcome of that study is that the facility's owners have increased the minimum instream flow in order to protect ecological values.

  8. Hydropower's Biogenic Carbon Footprint.

    Science.gov (United States)

    Scherer, Laura; Pfister, Stephan

    2016-01-01

    Global warming is accelerating and the world urgently needs a shift to clean and renewable energy. Hydropower is currently the largest renewable source of electricity, but its contribution to climate change mitigation is not yet fully understood. Hydroelectric reservoirs are a source of biogenic greenhouse gases and in individual cases can reach the same emission rates as thermal power plants. Little is known about the severity of their emissions at the global scale. Here we show that the carbon footprint of hydropower is far higher than previously assumed, with a global average of 173 kg CO2 and 2.95 kg CH4 emitted per MWh of electricity produced. This results in a combined average carbon footprint of 273 kg CO2e/MWh when using the global warming potential over a time horizon of 100 years (GWP100). Nonetheless, this is still below that of fossil energy sources without the use of carbon capture and sequestration technologies. We identified the dams most promising for capturing methane for use as alternative energy source. The spread among the ~1500 hydropower plants analysed in this study is large and highlights the importance of case-by-case examinations.

  9. Hydropower's Biogenic Carbon Footprint.

    Directory of Open Access Journals (Sweden)

    Laura Scherer

    Full Text Available Global warming is accelerating and the world urgently needs a shift to clean and renewable energy. Hydropower is currently the largest renewable source of electricity, but its contribution to climate change mitigation is not yet fully understood. Hydroelectric reservoirs are a source of biogenic greenhouse gases and in individual cases can reach the same emission rates as thermal power plants. Little is known about the severity of their emissions at the global scale. Here we show that the carbon footprint of hydropower is far higher than previously assumed, with a global average of 173 kg CO2 and 2.95 kg CH4 emitted per MWh of electricity produced. This results in a combined average carbon footprint of 273 kg CO2e/MWh when using the global warming potential over a time horizon of 100 years (GWP100. Nonetheless, this is still below that of fossil energy sources without the use of carbon capture and sequestration technologies. We identified the dams most promising for capturing methane for use as alternative energy source. The spread among the ~1500 hydropower plants analysed in this study is large and highlights the importance of case-by-case examinations.

  10. Hydropower development priority using MCDM method

    Energy Technology Data Exchange (ETDEWEB)

    Supriyasilp, Thanaporn [Department of Civil Engineering, Chiang Mai University, Chiang Mai 50200 (Thailand); Pongput, Kobkiat [Department of Water Resource Engineering, Kasetsart University, Bangkhen Campus, Bangkok 10900 (Thailand); Boonyasirikul, Thana [Electricity Generating Authority of Thailand, Bang Kruai, Nonthaburi 11130 (Thailand)

    2009-05-15

    Hydropower is recognized as a renewable and clean energy sources and its potential should be realized in an environmentally sustainable and socially equitable manner. Traditionally, the decision criteria when analyzing hydropower projects, have been mostly a technical and economical analysis which focused on the production of electricity. However, environmental awareness and sensitivity to locally affected people should also be considered. Multi-criteria decision analysis has been applied to study the potential to develop hydropower projects with electric power greater than 100 kW in the Ping River Basin, Thailand, and to determine the advantages and disadvantages of the projects in five main criteria: electricity generation, engineering and economics, socio-economics, environment, and stakeholder involvement. There are 64 potential sites in the study area. Criteria weights have been discussed and assigned by expert groups for each main criteria and subcriteria. As a consequence of weight assignment, the environmental aspect is the most important aspect in the view of the experts. Two scenarios using expert weight and fair weight have been studied to determine the priority for development of each project. This study has been done to assist policy making for hydropower development in the Ping River Basin. (author)

  11. A simple approximation of productivity scores of fuzzy production plans

    DEFF Research Database (Denmark)

    Hougaard, Jens Leth

    2005-01-01

    This paper suggests a simple approximation procedure for the assessment of productivity scores with respect to fuzzy production plans. The procedure has a clear economic interpretation and all the necessary calculations can be performed in a spreadsheet making it highly operational......This paper suggests a simple approximation procedure for the assessment of productivity scores with respect to fuzzy production plans. The procedure has a clear economic interpretation and all the necessary calculations can be performed in a spreadsheet making it highly operational...

  12. DOE Hydropower Program Annual Report for FY 2002

    Energy Technology Data Exchange (ETDEWEB)

    Garold L. Sommers; R. T. Hunt

    2003-07-01

    The U.S. Department of Energy (DOE) conducts research on advanced hydropower technology through its hydropower program, which is organized under the Office of Wind and Hydropower Technologies within the Office of Energy Efficiency and Renewable Energy. This annual report describes the various projects supported by the hydropower program in FY 2002. The program=s current focus is on improving the environmental performance of hydropower projects by addressing problems such as fish mortality during passage through turbines, alteration of instream habitat, and water quality in tailwaters. A primary goal of this research is to develop new, environmentally friendly technology. DOE-funded projects have produced new conceptual designs for turbine systems, and these are now being tested in pilot-scale laboratory tests and in the field. New design approaches range from totally new turbine runners to modifications of existing designs. Biological design criteria for these new turbines have also been developed in controlled laboratory tests of fish response to physical stresses, such as hydraulic shear and pressure changes. These biocriteria are being combined with computational tools to locate and eliminate areas inside turbine systems that are damaging to fish. Through the combination of laboratory, field, and computational studies, new solutions are being found to environmental problems at hydropower projects. The diverse program activities continue to make unique contributions to clean energy production in the U.S. By working toward technology improvements that can reduce environmental problems, the program is helping to reposition hydropower as an acceptable, renewable, domestic energy choice.

  13. Climate Vulnerability of Hydro-power infrastructure in the Eastern African Power Pool

    Science.gov (United States)

    Sridharan, Vignesh

    2017-04-01

    At present there is around 6000 MW of installed hydropower capacity in the Eastern African power pool (EAPP)[1]. With countries aggressively planning to achieve the Sustainable development goal (SDG) of ensuring access to affordable electricity for all, a three-fold increase in hydropower capacity is expected by 2040 [1]. Most of the existing and planned infrastructure lie inside the Nile River Basin. The latest assessment report (AR 5) from the Intergovernmental Panel on Climate Change (IPCC) indicates a high level of climatic uncertainty in the Nile Basin. The Climate Moisture index (CMI) for the Eastern Nile region and the Nile Equatorial lakes varies significantly across the different General Circulation Models (GCM)[2]. Such high uncertainty casts a shadow on the plans to expand hydropower capacity, doubting whether hydropower expansion can contribute to the goal of improving access to electricity or end up as sunk investments. In this assessment, we analyze adaptation strategies for national energy systems in the Eastern African Power Pool (EAPP), which minimize the regret that could potentially arise from impacts of a changed climate. An energy systems model of the EAPP is developed representing national electricity supply infrastructure. Cross border transmission and hydropower infrastructure is defined at individual project level. The energy systems model is coupled with a water systems management model of the Nile River Basin that calculates the water availability at different hydropower infrastructures under a range of climate scenarios. The results suggest that a robust adaptation strategy consisting of investments in cross border electricity transmission infrastructure and diversifying sources of electricity supply will require additional investments of USD 4.2 billion by 2050. However, this leads to fuel and operational cost savings of up to USD 22.6 billion, depending on the climate scenario. [1] "Platts, 2016. World Electric Power Plants Database

  14. Graduate Student Project: Operations Management Product Plan

    Science.gov (United States)

    Fish, Lynn

    2007-01-01

    An operations management product project is an effective instructional technique that fills a void in current operations management literature in product planning. More than 94.1% of 286 graduates favored the project as a learning tool, and results demonstrate the significant impact the project had in predicting student performance. The author…

  15. Modeling and dynamic behaviour of hydropower plants

    CERN Document Server

    Kishor, Nand

    2017-01-01

    This book presents a systematic approach to mathematical modeling of different configurations of hydropower plants over four sections - modeling and simulation approaches; control of hydropower plants; operation and scheduling of hydropower plants, including pumped storage; and special features of small hydropower plants.

  16. AVLIS Production Plant Project Management Plan

    Energy Technology Data Exchange (ETDEWEB)

    1984-11-15

    The AVLIS Production Plant is designated as a Major System Acquisition (in accordance with DOE Order 4240.IC) to deploy Atomic Vapor Laser Isotope Separation (AVLIS) technology at the Oak Ridge, Tennessee site, in support of the US Uranium Enrichment Program. The AVLIS Production Plant Project will deploy AVLIS technology by performing the design, construction, and startup of a production plant that will meet capacity production requirements of the Uranium Enrichment Program. The AVLIS Production Plant Project Management Plan has been developed to outline plans, baselines, and control systems to be employed in managing the AVLIS Production Plant Project and to define the roles and responsibilities of project participants. Participants will develop and maintain detailed procedures for implementing the management and control systems in agreement with this plan. This baseline document defines the system that measures work performed and costs incurred. This plan was developed by the AVLIS Production Plant Project staff of Martin Marietta Energy Systems, Inc. and Lawrence Livermore National Laboratory in accordance with applicable DOE directives, orders and notices. 38 figures, 19 tables.

  17. An optimal hydropower contract load determination method considering both human and riverine ecosystem needs

    Science.gov (United States)

    Yin, Xin'an; Yang, Zhifeng; Liu, Cailing; Zhao, Yanwei

    2015-09-01

    In this research, a new method is developed to determine the optimal contract load for a hydropower reservoir, which is achieved by incorporating environmental flows into the determination process to increase hydropower revenues, while mitigating the negative impacts of hydropower generation on riverine ecosystems. In this method, the degree of natural flow regime alteration is adopted as a constraint of hydropower generation to protect riverine ecosystems, and the maximization of mean annual revenue is set as the optimization objective. The contract load in each month and the associated reservoir operating parameters were simultaneously optimized by a genetic algorithm. The proposed method was applied to China's Wangkuai Reservoir to test its effectiveness. The new method offers two advantages over traditional studies. First, it takes into account both the economic benefits and the ecological needs of riverine systems, rather than only the economic benefits, as in previous methods. Second, although many measures have been established to mitigate the negative ecological impacts of hydropower generation, few have been applied to the hydropower planning stage. Thus, since the contract load is an important planning parameter for hydropower generation, influencing both economic benefits and riverine ecosystem protection, this new method could provide guidelines for the establishment of river protection measures at the hydropower planning stage.

  18. Methane Ebullition in Temperate Hydropower Reservoirs and Implications for US Policy on Greenhouse Gas Emissions

    Energy Technology Data Exchange (ETDEWEB)

    Miller, Benjamin L.; Arntzen, Evan V.; Goldman, Amy E.; Richmond, Marshall C.

    2017-07-21

    The United States is home to more than 87,000 dams, 2,198 of which are actively used for hydropower production. With the December 2015 consensus adoption of the United Nations Framework Convention on Climate Change’s Paris Agreement, it is imperative for the U.S. to accurately quantify greenhouse gas fluxes from its hydropower reservoirs. Methane ebullition, or methane bubbles originating from river or lake sediments, can account for nearly all of a reservoir’s methane emissions to the atmosphere. However, methane ebullition in hydropower reservoirs has been studied in only three temperate locations, none of which are in the United States. This study measures high ebullitive methane fluxes from two hydropower reservoirs in eastern Washington, synthesizes the known information about methane ebullition from tropical, boreal, and temperate hydropower reservoirs, and investigates the implications for U.S. hydropower management and growth.

  19. Addressing biogenic greenhouse gas emissions from hydropower in LCA.

    Science.gov (United States)

    Hertwich, Edgar G

    2013-09-03

    The ability of hydropower to contribute to climate change mitigation is sometimes questioned, citing emissions of methane and carbon dioxide resulting from the degradation of biogenic carbon in hydropower reservoirs. These emissions are, however, not always addressed in life cycle assessment, leading to a bias in technology comparisons, and often misunderstood. The objective of this paper is to review and analyze the generation of greenhouse gas emissions from reservoirs for the purpose of technology assessment, relating established emission measurements to power generation. A literature review, data collection, and statistical analysis of methane and CO2 emissions are conducted. In a sample of 82 measurements, methane emissions per kWh hydropower generated are log-normally distributed, ranging from micrograms to 10s of kg. A multivariate regression analysis shows that the reservoir area per kWh electricity is the most important explanatory variable. Methane emissions flux per reservoir area are correlated with the natural net primary production of the area, the age of the power plant, and the inclusion of bubbling emissions in the measurement. Even together, these factors fail to explain most of the variation in the methane flux. The global average emissions from hydropower are estimated to be 85 gCO2/kWh and 3 gCH4/kWh, with a multiplicative uncertainty factor of 2. GHG emissions from hydropower can be largely avoided by ceasing to build hydropower plants with high land use per unit of electricity generated.

  20. Status of hydropower and water resources in the Southeastern Anatolia Project (GAP of Turkey

    Directory of Open Access Journals (Sweden)

    Murat Kankal

    2016-11-01

    Full Text Available This study focuses on the water resources development of the Southeastern Anatolia Project (GAP in Turkey. The Euphrates and Tigris Rivers, located in the GAP, have the largest flow volume of 16.9% and 11.4% of Turkey’s average annually runoff (186 billion m3, respectively. While the Euphrates represents over 19.4% of the national gross hydropower potential (433 GWh/year, the Tigris correspond to 11.2% of this potential. 20,523 GWh/year of hydropower potential in the GAP is in operation. When all projects of the GAP in planning are completed, the total hydropower potential reaches a level of 27,419 GWh/year. This value corresponds to 10.9% of the annual electric energy production of Turkey in 2014 (251.96 GWh. There is also irrigable land of 1.06 million ha in the GAP, and now roughly 33.7%, 357,241 ha, of which have been irrigated.

  1. The Effect of Production Planning and Budgeting on Organizational Productivity

    Directory of Open Access Journals (Sweden)

    Patrick Adebisi Olusegun ADEGBUYI

    2010-12-01

    Full Text Available Improved productivity and proper organizational structure are desired by most manufacturing outfits within the highly turbulent business environment of Nigeria. With various contributing factors, scientific basis for decision making that will lead to enhanced policies for organizational operations is stronlgy established. Five statistical hypotheses which are influence of education, government policies, planning and organizational output, and production planning/budgeting and technological advancement, propounded in this work were investigated to establish a valid decision basis on a confidence level assumed to be 0.05. The work finally examined the impact of the hypotheses on productivity.

  2. Crop succession requirements in agricultural production planning

    NARCIS (Netherlands)

    Klein Haneveld, W.K.; Stegeman, A.

    2005-01-01

    A method is proposed to write crop succession requirements as linear constraints in an LP-based model for agricultural production planning. Crop succession information is given in the form of a set of inadmissible successions of crops. The decision variables represent the areas where a certain

  3. World Small Hydropower Development Report

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Heng; Esser, Lara (ICSGP (China)); Masera, Diego (UNIDO, Vienna (Austria))

    2013-07-01

    Currently, small hydropower plants with a capacity of 10 MW, exist in 148 countries or territories worldwide. Four other countries have been identified with resource potential. This report aims to identify the development status and resource potential of small hydro in various countries, territories and regions throughout the world. Working with experts at the ground level to compile and share existing information, experiences and challenges, one comprehensive report was created. Decision-makers, stakeholders and potential investors clearly need this comprehensive information to more effectively promote small hydropower as a renewable and rural energy source for sustainable development and to overcome the existing development barriers. The findings of this report show that small hydropower potential globally is approximated at almost 173 GW. The figure is arrived by totaling data from a wide range of sources with potential compromise of data integrity to varying degrees. For example, research data on economically feasible potential were more readily available in developed countries than those in the least developed or developing countries. More than half of the world's known hydropower potential is located in Asia, around one third can be found in Europe and the Americas. It is possible in the future that more small hydropower potential might be identified both on the African and American continents. The installed small hydropower capacity (up to 10 MW) is estimated to be 75 GW in 2011/2012. The report provides detailed data for each country/region, including recommendations on the national, regional and international level.

  4. Assessing residual hydropower potential of the La Plata Basin accounting for future user demands

    Directory of Open Access Journals (Sweden)

    I. Popescu

    2012-08-01

    Full Text Available La Plata Basin is shared by five countries (Argentina, Bolivia, Brazil, Paraguay and Uruguay, which have fast growing economies in South America. These countries need energy for their sustainable development; hence, hydropower can play a very important role as a renewable clean source of energy. This paper presents an analysis of the current hydropower production and electricity demand in La Plata Basin (LPB, and it analyses the maximum and residual hydropower potential of the basin for a horizon of 30 yr (i.e. year 2040. Current hydropower production is estimated based on historical available data, while future energy production is deduced from the available water in the catchment (estimated based on measured hydrographs of the past years, whereas electricity demand is assessed by correlating existing electricity demand with the estimated population growth and economic development. The maximum and residual hydropower potential of the basin were assessed for the mean annual flows of the present hydrological regime (1970–2000 and topographical characteristics of the area.

    Computations were performed using an integrated GIS environment called VAPIDRO-ASTE released by the Research on Energy System (Italy. The residual hydropower potential of the basin is computed considering first that the water supply needs for population, industry and agriculture are served, and then hydropower energy is produced. The calculated hydropower production is found to be approximately half of the estimated electricity demand, which shows that there is a need to look for other sources of energy in the future.

  5. Assessing residual hydropower potential of the La Plata Basin accounting for future user demands

    Science.gov (United States)

    Popescu, I.; Brandimarte, L.; Perera, M. S. U.; Peviani, M.

    2012-08-01

    La Plata Basin is shared by five countries (Argentina, Bolivia, Brazil, Paraguay and Uruguay), which have fast growing economies in South America. These countries need energy for their sustainable development; hence, hydropower can play a very important role as a renewable clean source of energy. This paper presents an analysis of the current hydropower production and electricity demand in La Plata Basin (LPB), and it analyses the maximum and residual hydropower potential of the basin for a horizon of 30 yr (i.e. year 2040). Current hydropower production is estimated based on historical available data, while future energy production is deduced from the available water in the catchment (estimated based on measured hydrographs of the past years), whereas electricity demand is assessed by correlating existing electricity demand with the estimated population growth and economic development. The maximum and residual hydropower potential of the basin were assessed for the mean annual flows of the present hydrological regime (1970-2000) and topographical characteristics of the area. Computations were performed using an integrated GIS environment called VAPIDRO-ASTE released by the Research on Energy System (Italy). The residual hydropower potential of the basin is computed considering first that the water supply needs for population, industry and agriculture are served, and then hydropower energy is produced. The calculated hydropower production is found to be approximately half of the estimated electricity demand, which shows that there is a need to look for other sources of energy in the future.

  6. Coordinated supply chain dynamic production planning model

    Science.gov (United States)

    Chandra, Charu; Grabis, Janis

    2001-10-01

    Coordination of different and often contradicting interests of individual supply chain members is one of the important issues in supply chain management because the individual members can not succeed without success of the supply chain and vice versa. This paper investigates a supply chain dynamic production planning problem with emphasis on coordination. A planning problem is formally described using a supply chain kernel, which defines supply chain configuration, management policies, available resources and objectives both at supply chain or macro and supply chain member or micro levels. The coordinated model is solved in order to balance decisions made at the macro and micro levels and members' profitability is used as the coordination criterion. The coordinated model is used to determine inventory levels and production capacity across the supply chain. Application of the coordinated model distributes costs burden uniformly among supply chain members and preserves overall efficiency of the supply chain. Influence of the demand series uncertainty is investigated. The production planning model is a part of the integrated supply chain decision modeling system, which is shared among the supply chain members across the Internet.

  7. An improved method for evaluating ecological suitability of hydropower development by considering water footprint and transportation connectivity in Tibet, China.

    Science.gov (United States)

    Cui, Guannan; Wang, Xuan; Xu, Linyu; Zhang, Jin; Yu, Bing

    2014-01-01

    Ecological suitability evaluation for hydropower development is effective in locating the most suitable area for construction and emphasizes a clear direction for water resources governance. In this paper, water footprints and transportation connectivity were introduced to improve the existing ecological suitability evaluation application for hydropower development by revising the defects of the traditional indicator system. The following conclusions were reached. (1) Tibet was in a state of water use surplus; the prospect of further hydropower development is positive. (2) Chamdo, Lhasa and Nyingchi excelled in water use efficiency, and Ali was placed last. Nakchu was slightly superior to Ali, but it lagged behind the southern regions. Lhasa, Chamdo, Nyingchi, Xigaze and Shannan were suitable for hydropower development, which could further meet local needs and benefit other regions of China. (3) The evaluation results were in accordance with the actual eco-environmental conditions of the built hydropower projects, indicating that current hydropower development planning was basically reasonable.

  8. A deterministic aggregate production planning model considering quality of products

    Science.gov (United States)

    Madadi, Najmeh; Yew Wong, Kuan

    2013-06-01

    Aggregate Production Planning (APP) is a medium-term planning which is concerned with the lowest-cost method of production planning to meet customers' requirements and to satisfy fluctuating demand over a planning time horizon. APP problem has been studied widely since it was introduced and formulated in 1950s. However, in several conducted studies in the APP area, most of the researchers have concentrated on some common objectives such as minimization of cost, fluctuation in the number of workers, and inventory level. Specifically, maintaining quality at the desirable level as an objective while minimizing cost has not been considered in previous studies. In this study, an attempt has been made to develop a multi-objective mixed integer linear programming model that serves those companies aiming to incur the minimum level of operational cost while maintaining quality at an acceptable level. In order to obtain the solution to the multi-objective model, the Fuzzy Goal Programming approach and max-min operator of Bellman-Zadeh were applied to the model. At the final step, IBM ILOG CPLEX Optimization Studio software was used to obtain the experimental results based on the data collected from an automotive parts manufacturing company. The results show that incorporating quality in the model imposes some costs, however a trade-off should be done between the cost resulting from producing products with higher quality and the cost that the firm may incur due to customer dissatisfaction and sale losses.

  9. Production planning and scheduling in refinery industry

    Energy Technology Data Exchange (ETDEWEB)

    Persson, Jan

    1999-07-01

    In this thesis we consider production planning and scheduling in refinery industry, in particular we study the planning and scheduling at the Nynaes AB refinery and at the Scanraff AB refinery. The purpose is to contribute to the development and the use of optimization models to support efficient decision making. We identify various decision problems concerning the aggregated production planning, the shipment planning, the scheduling of operation modes, and the utilization of pipes and tanks; and we discuss the potential to successfully apply optimization models on these problems. We formulate a mixed integer linear programming model for the scheduling of operation modes at Nynaes. The model concerns decisions about which mode of operation to use at a particular point in time in order to minimize costs of changing modes and costs of keeping inventories, given demands for products. We derive several types of valid inequalities for this mathematical problem and show how these inequalities can improve the lower bound obtained from the linear programming relaxation of the problem. We also show how the valid inequalities can be used to improve the performance of a branch and bound solution approach. Further, a tabu search heuristic is developed for the scheduling problem. The solution methods are tested on data provided by the Nynaes refinery, and the performance of the methods are discussed. We present several extensions of the proposed model, and illustrate how the model can be used to support both operational and strategic decision making at the refinery. 66 refs, 6 figs, 32 tabs. Also published as: Dissertation from the International Graduate School of Management and Industrial Engineering, No 25, Licenciate Thesis.

  10. Production planning and scheduling in refinery industry

    Energy Technology Data Exchange (ETDEWEB)

    Persson, Jan

    1999-06-01

    In this thesis we consider production planning and scheduling in refinery industry, in particular we study the planning and scheduling at the Nynaes AB refinery and at the Scanraff AB refinery. The purpose is to contribute to the development and the use of optimization models to support efficient decision making. We identify various decision problems concerning the aggregated production planning, the shipment planning, the scheduling of operation modes, and the utilization of pipes and tanks; and we discuss the potential to successfully apply optimization models on these problems. We formulate a mixed integer linear programming model for the scheduling of operation modes at Nynaes. The model concerns decisions about which mode of operation to use at a particular point in time in order to minimize costs of changing modes and costs of keeping inventories, given demands for products. We derive several types of valid inequalities for this mathematical problem and show how these inequalities can improve the lower bound obtained from the linear programming relaxation of the problem. We also show how the valid inequalities can be used to improve the performance of a branch and bound solution approach. Further, a tabu search heuristic is developed for the scheduling problem. The solution methods are tested on data provided by the Nynaes refinery, and the performance of the methods are discussed. We present several extensions of the proposed model, and illustrate how the model can be used to support both operational and strategic decision making at the refinery. 66 refs, 6 figs, 32 tabs. Also published as: Dissertation from the International Graduate School of Management and Industrial Engineering, No 25, Licenciate Thesis

  11. Organizing environmental flow frameworks to meet hydropower mitigation needs

    Science.gov (United States)

    McManamay, Ryan A.; Brewer, Shannon K.; Jager, Henriette; Troia, Matthew J.

    2016-01-01

    The global recognition of the importance of natural flow regimes to sustain the ecological integrity of river systems has led to increased societal pressure on the hydropower industry to change plant operations to improve downstream aquatic ecosystems. However, a complete reinstatement of natural flow regimes is often unrealistic when balancing water needs for ecosystems, energy production, and other human uses. Thus, stakeholders must identify a prioritized subset of flow prescriptions that meet ecological objectives in light of realistic constraints. Yet, isolating aspects of flow regimes to restore downstream of hydropower facilities is among the greatest challenges of environmental flow science due, in part, to the sheer volume of available environmental flow tools in conjunction with complex negotiation-based regulatory procedures. Herein, we propose an organizational framework that structures information and existing flow paradigms into a staged process that assists stakeholders in implementing environmental flows for hydropower facilities. The framework identifies areas where regulations fall short of the needed scientific process, and provide suggestions for stakeholders to ameliorate those situations through advanced preparation. We highlight the strengths of existing flow paradigms in their application to hydropower settings and suggest when and where tools are most applicable. Our suggested framework increases the effectiveness and efficiency of the e-flow implementation process by rapidly establishing a knowledge base and decreasing uncertainty so more time can be devoted to filling knowledge gaps. Lastly, the framework provides the structure for a coordinated research agenda to further the science of environmental flows related to hydropower environments.

  12. Organizing Environmental Flow Frameworks to Meet Hydropower Mitigation Needs

    Science.gov (United States)

    McManamay, Ryan A.; Brewer, Shannon K.; Jager, Henriette I.; Troia, Matthew J.

    2016-09-01

    The global recognition of the importance of natural flow regimes to sustain the ecological integrity of river systems has led to increased societal pressure on the hydropower industry to change plant operations to improve downstream aquatic ecosystems. However, a complete reinstatement of natural flow regimes is often unrealistic when balancing water needs for ecosystems, energy production, and other human uses. Thus, stakeholders must identify a prioritized subset of flow prescriptions that meet ecological objectives in light of realistic constraints. Yet, isolating aspects of flow regimes to restore downstream of hydropower facilities is among the greatest challenges of environmental flow science due, in part, to the sheer volume of available environmental flow tools in conjunction with complex negotiation-based regulatory procedures. Herein, we propose an organizational framework that structures information and existing flow paradigms into a staged process that assists stakeholders in implementing environmental flows for hydropower facilities. The framework identifies areas where regulations fall short of the needed scientific process, and provide suggestions for stakeholders to ameliorate those situations through advanced preparation. We highlight the strengths of existing flow paradigms in their application to hydropower settings and suggest when and where tools are most applicable. Our suggested framework increases the effectiveness and efficiency of the e-flow implementation process by rapidly establishing a knowledge base and decreasing uncertainty so more time can be devoted to filling knowledge gaps. Lastly, the framework provides the structure for a coordinated research agenda to further the science of environmental flows related to hydropower environments.

  13. China's rising hydropower demand challenges water sector

    NARCIS (Netherlands)

    Liu, J.; Zhao, D.; Gerbens-Leenes, Winnie; Guan, D.

    2015-01-01

    Demand for hydropower is increasing, yet the water footprints (WFs) of reservoirs and hydropower, and their contributions to water scarcity, are poorly understood. Here, we calculate reservoir WFs (freshwater that evaporates from reservoirs) and hydropower WFs (the WF of hydroelectricity) in China

  14. Small Hydropower in the United States

    Energy Technology Data Exchange (ETDEWEB)

    Hadjerioua, Boualem [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Johnson, Kurt [Telluride Energy, Telluride, CO (United States)

    2015-09-01

    Small hydropower, defined in this report as hydropower with a generating capacity of up to 10 MW typically built using existing dams, pipelines, and canals has substantial opportunity for growth. Existing small hydropower comprises about 75% of the current US hydropower fleet in terms of number of plants. The economic feasibility of developing new small hydropower projects has substantially improved recently, making small hydropower the type of new hydropower development most likely to occur. In 2013, Congress unanimously approved changes to simplify federal permitting requirements for small hydropower, lowering costs and reducing the amount of time required to receive federal approvals. In 2014, Congress funded a new federal incentive payment program for hydropower, currently worth approximately 1.5 cents/kWh. Federal and state grant and loan programs for small hydropower are becoming available. Pending changes in federal climate policy could benefit all renewable energy sources, including small hydropower. Notwithstanding remaining barriers, development of new small hydropower is expected to accelerate in response to recent policy changes.

  15. Environmental Issues Related to Conventional Hydropower

    Energy Technology Data Exchange (ETDEWEB)

    Deng, Zhiqun; Colotelo, Alison HA; Brown, Richard S.; Carlson, Thomas J.

    2016-04-27

    Hydropower is the largest renewable electrical energy source in the world and has a total global capacity of approximately 1,010 GW from 150 countries. Although hydropower has many environmental advantages, hydropower dams have potential adverse ecological impacts such as fish passage, water quality, and habitat alterations.

  16. Product service system product design task planning with supplier participation

    Directory of Open Access Journals (Sweden)

    Zhongqi Sheng

    2015-12-01

    Full Text Available Product service system is a new-type production system with high-degree integration and overall optimization of product and service. The participation of suppliers in product service system development will greatly shorten the development cycle and enhance the production efficiency. The task planning of product design is one of the key phases of product service system development process, which mainly contains the design task decomposition and the design task allocation. Aiming at product service system product design, this article conducts the decomposition of design tasks, performs the recognition of coupling design task set, and realizes the structured modeling of design tasks. Outsourcing decision-making analysis is conducted on the design tasks obtained through decomposition process so as to confirm the design tasks that need the participation of suppliers. The allocation model of design tasks is constructed, and the suppliers that take part in product service system development are confirmed based on genetic algorithm. Taking the numerical control machine tool as an example, this article conducts the instance analysis and verifies the feasibility of the forenamed methods.

  17. False Shades of Green: The Case of Brazilian Amazonian Hydropower

    Directory of Open Access Journals (Sweden)

    James Randall Kahn

    2014-09-01

    Full Text Available The Federal Government of Brazil has ambitious plans to build a system of 58 additional hydroelectric dams in the Brazilian Amazon, with Hundreds of additional dams planned for other countries in the watershed. Although hydropower is often billed as clean energy, we argue that the environmental impacts of this project are likely to be large, and will result in substantial loss of biodiversity, as well as changes in the flows of ecological services. Moreover, the projects will generate significant greenhouse gas emissions from deforestation and decay of organic matter in the reservoirs. These emissions are equivalent to the five years of emissions that would be generated by gas powered plants of equivalent capacity. In addition, we examine the economic benefits of the hydropower in comparison to new alternatives, such as photovoltaic energy and wind power. We find that current costs of hydropower exceed alternatives, and the costs of costs of these alternatives are likely to fall substantially below those of hydropower, while the environmental damages from the dams will be extensive and irreversible.

  18. RI-production plan using JMTR

    Energy Technology Data Exchange (ETDEWEB)

    Hori, Naohiko; Izumo, Hironobu; Kanno, Masaru; Nakagawa, Tetsuya; Kawamura, Hiroshi [Japan Atomic Energy Agency (JAEA), Ibaraki (Japan)

    2008-11-15

    At Oarai Research and Development Centre, Japan Atomic Energy Agency (JAEA) is advancing the plan of refurbishing Japan Materials Testing Reactor (JMTR) to start the operation from FY 2011. At the JMTR, the iridium-192 ({sup 192}Ir) source for the medical treatment as well as for the industrial using in the non-destructive inspection has been irradiated. As one of effective use of the renewed JMTR, JAEA has a plan to produce molybdenum-99 ({sup 99}Mo), a parent nuclide of technetium-99 ({sup 99m}Tc). {sup 99m}Tc is most commonly used as a radiopharmaceutical in the field of nuclear medicine. Furthermore, production of radioisotope (RI) for which increasing demand is expected, e.g. rhenium-188 ({sup 188}Re) which is being expected as a cancer treatment medicine.

  19. [School meals: planning, production, distribution, and adequacy].

    Science.gov (United States)

    Issa, Raquel Carvalho; Moraes, Letícia Freitas; Francisco, Raquel Rocha Jabour; dos Santos, Luana Caroline; dos Anjos, Adriana Fernandez Versiani; Pereira, Simone Cardoso Lisboa

    2014-02-01

    To evaluate the planning, production, distribution, and nutritional adequacy of meals served at city schools. This descriptive cross-sectional study was conducted between March 2011 and April 2012 and included a representative sample (n = 42 schools) of extended shift city schools from Belo Horizonte, Minas Gerais, Brazil. Five meals from each school were randomly selected and analyzed by direct weighing. Production indicators and nutritional adequacy were evaluated in contrast to the recommendations of the city food security bureau and the Brazilian National Program of School Meals (PNAE). Seventy-nine percent of the analyzed meals did not meet the recommendations of the city food security bureau. The rate of waste (food left on plates) was acceptable at 4,90%, but the rates of cooked and not served food (7,06%) and counter leftovers (5,30%) were high. Both the city planned meals and the meals served in the schools were nutritionally inadequate in terms of the PNAE, particularly for children aged 11-15 years. There was a relationship between consumption by school staff and the amount of food that was cooked (r = 0.353; P < 0.001) and the rate of cooked and not served food (r = 0.138; P = 0.045). Waste was positively correlated with the rate of counter leftovers (r = 0.145; P = 0.035), and inversely correlated with fiber intake (r = -0.143; P = 0.038). The results indicate the importance of monitoring the planning, production, and distribution of school meals and of food and nutrition education in order to improve the quality of food and to reduce waste in schools.

  20. Hydropower and Sustainable Development: A Journey

    Energy Technology Data Exchange (ETDEWEB)

    Schumann, Kristin; Saili, Lau; Taylor, Richard; Abdel-Malek, Refaat

    2010-09-15

    Hydropower produces 16% of our electricity; it is one of the world's major renewable energy resources. It is playing an important role in enabling communities around the world to meet their power and water needs. The pace of hydropower growth has been rapid but sometimes with little guidance to ensure development is based on sustainability principles. Some of the most promising initiatives to fill the void, such as the Hydropower Sustainability Assessment Protocol, have been driven by the hydropower sector itself. Efforts focus on carrying forward this momentum to obtain a tool for hydropower sustainability agreed across sectors and stakeholders.

  1. Estimated cumulative sediment trapping in future hydropower reservoirs in Africa

    Science.gov (United States)

    Lucía, Ana; Berlekamp, Jürgen; Zarfl, Christiane

    2017-04-01

    Despite a rapid economic development in Sub-Saharan Africa, almost 70% of the human population in this area remain disconnected from electricity access (International Energy Agency 2011). Mitigating climate change and a search for renewable, "climate neutral" electricity resources are additional reasons why Africa will be one key centre for future hydropower dam building, with only 8% of the technically feasible hydropower potential actually exploited. About 300 major hydropower dams with a total capacity of 140 GW are currently under construction (11.4%) or planned (88.6%) (Zarfl et al. 2015). Despite the benefits of hydropower dams, fragmentation of the rivers changes the natural flow, temperature and sediment regime. This has consequences for a high number of people that directly depend on the primary sector linked to rivers and floodplains. But sediment trapping in the reservoir also affects dam operation and decreases its life span. Thus, the objective of this work is to quantify the dimension of sediment trapping by future hydropower dams in African river basins. Soil erosion is described with the universal soil loss equation (Wischmeier & Smith 1978) and combined with the connectivity index (Cavalli et al. 2013) to estimate the amount of eroded soil that reaches the fluvial network and finally ends up in the existing (Lehner et al. 2011) and future reservoirs (Zarfl et al. 2015) per year. Different scenarios assuming parameter values from the literature are developed to include model uncertainty. Estimations for existing dams will be compared with literature data to evaluate the applied estimation method and scenario assumptions. Based on estimations for the reservoir volume of the future dams we calculated the potential time-laps of the future reservoirs due to soil erosion and depending on their planned location. This approach could support sustainable decision making for the location of future hydropower dams. References Cavalli, M., Trevisani, S., Comiti

  2. The impacts of climate change on a Norwegian high-head hydropower plant

    Energy Technology Data Exchange (ETDEWEB)

    Chernet, Haregewoin Haile; Alfredsen, Knut; Killintveit, Aanund

    2010-07-01

    Full text: Norway relies on hydropower for 99 percent of the electricity production and thus Hydropower is important for Norway today and in the future energy system. The work presented in this paper shows how a high-head hydropower system in Norway will be affected in the future climate. The Aurland Hydropower system, operated by E-Co Vannkraft, Norway is the test case for the study. The Aurland hydropower system has many reservoirs and transfer systems and is considered to be one of the complex systems in Norway, but also a typical example of a Norwegian high head system. The nMAG Hydropower simulation model, which has been developed at the Norwegian Hydro technical Laboratory, is used to simulate the hydropower system. Historical and future inflow series were transposed from the neighbouring catchment Flaamselvi using scaling based on area and specific runoff, as there is no discharge station in Aurland catchment with long unregulated inflow series to set up the model and to be used for developing future climate scenarios. To generate the future inflow series for the analysis, the HBV hydrological model is calibrated for the Flaamselvi catchment. The model is then used to generate future inflow series of using the Hadley GCM (HADAm3) and A2, B2 climate scenarios. The operation of the hydropower system is then simulated for the period 2071 -2100 to see how future power production is affected by the change in the inflow conditions. The HBV model is also used to see how snow accumulation will be affected in the future as snow melt is important for Norwegian reservoir and hydropower systems. The Hydrologic scenarios under climate change imply an average increase in runoff for the system. Snow accumulation will decrease with sooner snow melt and more winter precipitation as rain. The hydropower simulation results show that associated with the increase in runoff there is an increase in energy generation with 10-20% under the current reservoir operation strategies

  3. Hydropower Baseline Cost Modeling, Version 2

    Energy Technology Data Exchange (ETDEWEB)

    O' Connor, Patrick W. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2015-09-01

    Recent resource assessments conducted by the United States Department of Energy have identified significant opportunities for expanding hydropower generation through the addition of power to non-powered dams and on undeveloped stream-reaches. Additional interest exists in the powering of existing water resource infrastructure such as conduits and canals, upgrading and expanding existing hydropower facilities, and the construction new pumped storage hydropower. Understanding the potential future role of these hydropower resources in the nation’s energy system requires an assessment of the environmental and techno-economic issues associated with expanding hydropower generation. To facilitate these assessments, this report seeks to fill the current gaps in publically available hydropower cost estimating tools that can support the national-scale evaluation of hydropower resources.

  4. Present and future hydropower scheduling in Statkraft

    Science.gov (United States)

    Bruland, O.

    2012-12-01

    Statkraft produces close to 40 TWH in an average year and is one of the largest hydropower producers in Europe. For hydropower producers the scheduling of electricity generation is the key to success and this depend on optimal use of the water resources. The hydrologist and his forecasts both on short and on long terms are crucial to this success. The hydrological forecasts in Statkraft and most hydropower companies in Scandinavia are based on lumped models and the HBV concept. But before the hydrological model there is a complex system for collecting, controlling and correcting data applied in the models and the production scheduling and, equally important, routines for surveillance of the processes and manual intervention. Prior to the forecasting the states in the hydrological models are updated based on observations. When snow is present in the catchments snow surveys are an important source for model updating. The meteorological forecast is another premise provider to the hydrological forecast and to get as precise meteorological forecast as possible Statkraft hires resources from the governmental forecasting center. Their task is to interpret the meteorological situation, describe the uncertainties and if necessary use their knowledge and experience to manually correct the forecast in the hydropower production regions. This is one of several forecast applied further in the scheduling process. Both to be able to compare and evaluate different forecast providers and to ensure that we get the best available forecast, forecasts from different sources are applied. Some of these forecasts have undergone statistical corrections to reduce biases. The uncertainties related to the meteorological forecast have for a long time been approached and described by ensemble forecasts. But also the observations used for updating the model have a related uncertainty. Both to the observations itself and to how well they represent the catchment. Though well known, these

  5. Project SHARE Sustainable Hydropower in Alpine Rivers Ecosystems

    Science.gov (United States)

    Mammoliti Mochet, Andrea

    2010-05-01

    SHARE - Sustainable Hydropower in Alpine Rivers Ecosystems is a running project early approved and co funded by the European regional development fund in the context of the European Territorial Cooperation Alpine Space programme 2007 - 2013: the project is formally ongoing from August 2009 and it will end July 2012. Hydropower is the most important renewable resource for electricity production in alpine areas: it has advantages for the global CO2 balance but creates serious environmental impacts. RES-e Directives require renewable electricity enhance but, at the same time, the Water Framework Directive obliges member States to reach or maintain a water bodies "good" ecological status, intrinsically limiting the hydropower exploitation. Administrators daily face an increasing demand of water abstraction but lack reliable tools to rigorously evaluate their effects on mountain rivers and the social and economical outputs on longer time scale. The project intends to develop, test and promote a decision support system to merge on an unprejudiced base, river ecosystems and hydropower requirements. This approach will be led using existing scientific tools, adjustable to transnational, national and local normative and carried on by permanent panel of administrators and stakeholders. Scientific knowledge related to HP & river management will be "translated" by the communication tools and spent as a concrete added value to build a decision support system. In particular, the Multicriteria Analysis (MCA) will be applied to assess different management alternatives where a single-criterion approach (such as cost-benefit analysis) falls short, especially where environmental, technical, economic and social criteria can't be quantified by monetary values. All the existing monitoring databases will be used and harmonized with new information collected during the Pilot case studies. At the same time, all information collected will be available to end users and actors of related

  6. A Holistic Framework for Environmental Flows Determination in Hydropower Contexts

    Energy Technology Data Exchange (ETDEWEB)

    McManamay, Ryan A [ORNL; Bevelhimer, Mark S [ORNL

    2013-05-01

    Among the ecological science community, the consensus view is that the natural flow regime sustains the ecological integrity of river systems. This prevailing viewpoint by many environmental stakeholders has progressively led to increased pressure on hydropower dam owners to change plant operations to affect downstream river flows with the intention of providing better conditions for aquatic biological communities. Identifying the neccessary magnitude, frequency, duration, timing, or rate of change of stream flows to meet ecological needs in a hydropower context is challenging because the ecological responses to changes in flows may not be fully known, there are usually a multitude of competing users of flow, and implementing environmental flows usually comes at a price to energy production. Realistically, hydropower managers must develop a reduced set of goals that provide the most benefit to the identified ecological needs. As a part of the Department of Energy (DOE) Water Power Program, the Instream Flow Project (IFP) was carried out by Oak Ridge National Laboratory (ORNL), Pacific Northwest National Laboratory (PNNL), and Argon National Laboratory (ANL) as an attempt to develop tools aimed at defining environmental flow needs for hydropower operations. The application of these tools ranges from national to site-specific scales; thus, the utility of each tool will depend on various phases of the environmental flow process. Given the complexity and sheer volume of applications used to determine environmentally acceptable flows for hydropower, a framework is needed to organize efforts into a staged process dependent upon spatial, temporal, and functional attributes. By far, the predominant domain for determining environmental flows related to hydropower is within the Federal Energy Regulatory Commission (FERC) relicensing process. This process can take multiple years and can be very expensive depending on the scale of each hydropower project. The utility of such a

  7. Task planning as a part of production control

    OpenAIRE

    Junnonen, Juha-Matti; Seppänen, Olli

    2004-01-01

    The execution of a construction project requires production planning and control to be performed with different levels of accuracy. In master plans, the overall progress of the whole construction project is planned and controlled. For practical implementation, site management requires more detailed plans. This can be achieved with the help of task planning, a method of planning which begins from what should be done. and examines in detail how the time, cost, and quality objectives can be achi...

  8. Portfolio optimisation for hydropower producers that balances riverine ecosystem protection and producer needs

    Science.gov (United States)

    Yin, X. A.; Yang, Z. F.; Liu, C. L.

    2014-04-01

    In deregulated electricity markets, hydropower portfolio design has become an essential task for producers. The previous research on hydropower portfolio optimisation focused mainly on the maximisation of profits but did not take into account riverine ecosystem protection. Although profit maximisation is the major objective for producers in deregulated markets, protection of riverine ecosystems must be incorporated into the process of hydropower portfolio optimisation, especially against a background of increasing attention to environmental protection and stronger opposition to hydropower generation. This research seeks mainly to remind hydropower producers of the requirement of river protection when they design portfolios and help shift portfolio optimisation from economically oriented to ecologically friendly. We establish a framework to determine the optimal portfolio for a hydropower reservoir, accounting for both economic benefits and ecological needs. In this framework, the degree of natural flow regime alteration is adopted as a constraint on hydropower generation to protect riverine ecosystems, and the maximisation of mean annual revenue is set as the optimisation objective. The electricity volumes assigned in different electricity submarkets are optimised by the noisy genetic algorithm. The proposed framework is applied to China's Wangkuai Reservoir to test its effectiveness. The results show that the new framework could help to design eco-friendly portfolios that can ensure a planned profit and reduce alteration of the natural flow regime.

  9. HEPS4Power - Extended-range Hydrometeorological Ensemble Predictions for Improved Hydropower Operations and Revenues

    Science.gov (United States)

    Bogner, Konrad; Monhart, Samuel; Liniger, Mark; Spririg, Christoph; Jordan, Fred; Zappa, Massimiliano

    2015-04-01

    forecasts against observed discharge. Analysis should be specifically oriented to the maximisation of hydroelectricity production. Thus, verification metrics should include economic measures like cost loss approaches. The final step will include the transfer of the HEPS system to several hydropower systems, the connection with the energy market prices and the development of probabilistic multi-reservoir production and management optimizations guidelines. The baseline model chain yielding three-days forecasts established for a hydropower system in southern-Switzerland will be presented alongside with the work-plan to achieve seasonal ensemble predictions.

  10. The influence of climate change on Tanzania's hydropower sustainability

    Science.gov (United States)

    Sperna Weiland, Frederiek; Boehlert, Brent; Meijer, Karen; Schellekens, Jaap; Magnell, Jan-Petter; Helbrink, Jakob; Kassana, Leonard; Liden, Rikard

    2015-04-01

    average potential of future hydropower production; it will likely make hydropower more profitable. Yet, the uncertainty in climate change projections remains large and risks are significant, adaptation strategies should ideally consider a worst case scenario to ensure robust power generation. Overall a diversified power generation portfolio, anchored in hydropower and supported by other renewables and fossil fuel-based energy sources, is the best solution for Tanzania

  11. Motion planning in cartesian product graphs

    Directory of Open Access Journals (Sweden)

    Deb Biswajit

    2014-05-01

    Full Text Available Let G be an undirected graph with n vertices. Assume that a robot is placed on a vertex and n − 2 obstacles are placed on the other vertices. A vertex on which neither a robot nor an obstacle is placed is said to have a hole. Consider a single player game in which a robot or obstacle can be moved to adjacent vertex if it has a hole. The objective is to take the robot to a fixed destination vertex using minimum number of moves. In general, it is not necessary that the robot will take a shortest path between the source and destination vertices in graph G. In this article we show that the path traced by the robot coincides with a shortest path in case of Cartesian product graphs. We give the minimum number of moves required for the motion planning problem in Cartesian product of two graphs having girth 6 or more. A result that we prove in the context of Cartesian product of Pn with itself has been used earlier to develop an approximation algorithm for (n2 − 1-puzzle

  12. DOE Hydropower Program Biennial Report for FY 2005-2006

    Energy Technology Data Exchange (ETDEWEB)

    Sale, Michael J [ORNL; Cada, Glenn F [ORNL; Acker, Thomas L. [Northern Arizona State University and National Renewable Energy Laboratory; Carlson, Thomas [Pacific Northwest National Laboratory (PNNL); Dauble, Dennis D. [Pacific Northwest National Laboratory (PNNL); Hall, Douglas G. [Idaho National Laboratory (INL)

    2006-07-01

    . Completed a state-of-the-science review of hydropower optimization methods and published reports on alternative operating strategies and opportunities for spill reduction. Carried out feasibility studies of new environmental performance measurements of the new MGR turbine at Wanapum Dam, including measurement of behavioral responses, biomarkers, bioindex testing, and the use of dyes to assess external injuries. Evaluated the benefits of mitigation measures for instream flow releases and the value of surface flow outlets for downstream fish passage. Refined turbulence flow measurement techniques, the computational modeling of unsteady flows, and models of blade strike of fish. Published numerous technical reports, proceedings papers, and peer-reviewed literature, most of which are available on the DOE Hydropower website. Further developed and tested the sensor fish measuring device at hydropower plants in the Columbia River. Data from the sensor fish are coupled with a computational model to yield a more detailed assessment of hydraulic environments in and around dams. Published reports related to the Virtual Hydropower Prospector and the assessment of water energy resources in the U.S. for low head/low power hydroelectric plants. Convened a workshop to consider the environmental and technical issues associated with new hydrokinetic and wave energy technologies. Laboratory and DOE staff participated in numerous workshops, conferences, coordination meetings, planning meetings, implementation meetings, and reviews to transfer the results of DOE-sponsored research to end-users.

  13. Quadrennial Technology Review 2015: Technology Assessments--Hydropower

    Energy Technology Data Exchange (ETDEWEB)

    Sam Baldwin, Gilbert Bindewald, Austin Brown, Charles Chen, Kerry Cheung, Corrie Clark, Joe Cresko,

    2015-10-07

    Hydropower has provided reliable and flexible base and peaking power generation in the United States for more than a century, contributing on average 10.5% of cumulative U.S. power sector net generation over the past six and one-half decades (1949–2013). It is the nation’s largest source of renewable electricity, with 79 GW of generating assets and 22 GW of pumped-storage assets in service, with hydropower providing half of all U.S. renewable power-sector generation (50% in 2014). In addition to this capacity, the U.S. Department of Energy (DOE) has identified greater than 80 GW of new hydropower resource potential: at least 5 GW from rehabilitation and expansion of existing generating assets, up to 12 GW of potential at existing dams without power facilities, and over 60 GW of potential low-impact new development (LIND) in undeveloped stream reaches. However, despite this growth potential, hydropower capacity and production growth have stalled in recent years, with existing assets even experiencing decreases in capacity and production from lack of sustaining investments in infrastructure and increasing constraints on water use.

  14. A review of planning models for maintenance and production.

    NARCIS (Netherlands)

    G. Budai-Balke (Gabriella); R. Dekker (Rommert); R.P. Nicolai (Robin)

    2006-01-01

    textabstractIn this article we give an overview of the relation between planning of maintenance and production. On the one hand we consider production planning and scheduling models in which failures and maintenance aspects are taken into account. Next we discuss the planning of maintenance

  15. The use of hydropower in South Tyrol; Wasserkraftnutzung in Suedtirol. Ausgangsvoraussetzungen, Bedeutung und Akteure

    Energy Technology Data Exchange (ETDEWEB)

    Berger, W. [Orizzonti, Verona (Italy)

    2007-12-03

    The Autonomous Province of Bolzano in the north of Italy is richly endowed with water ressources, which provided an essential basis for industrial development in the last century. Even today electricity production, exceeding consumption figures of the Province, is almost entirely based on hydropower. At the main river Adige and its tributaries there are currently about 850 hydropower plants in operation. Nearly 85% of the installed power are owned by only four electric utilities. The Region Trentino-Alto Adige shows a higher capacity per inhabitant and per surface of electricity generation from hydropower than Austria, internationally renowned for her exploitation of this ressource. (orig.)

  16. Cost planning in the stage of product development

    Directory of Open Access Journals (Sweden)

    Todić Vladimir V.

    2014-01-01

    Full Text Available The total product life cycle cost can be planned based on one of the methods of global cost estimation. Also, total product life cycle cost can be planned based on cost plans and estimates by phases of the product life cycle, such as the phases of development, production, use and termination of the life cycle. By identifying the specific activities related to the relevant phases of life cycle as corresponding cost drivers, it is possible to accurately determine the total cost of individual phases using suitable methods known in the literature. This paper presents planning possibility respectively cost assessment of product development phase.

  17. Modelling and controlling hydropower plants

    CERN Document Server

    Munoz-Hernandez, German Ardul; Jones, Dewi Ieuan

    2013-01-01

    Hydroelectric power stations are a major source of electricity around the world; understanding their dynamics is crucial to achieving good performance.  Modelling and Controlling Hydropower Plants discusses practical and well-documented cases of modelling and controlling hydropower station modelling and control, focussing on a pumped storage scheme based in Dinorwig, North Wales.  Single-input-single-output and multiple-input-multiple-output models, which cover the linear and nonlinear characteristics of pump-storage hydroelectric power stations, are reviewed. The most important dynamic features are discussed, and the verification of these models by hardware in the loop simulation is described. To show how the performance of a pump-storage hydroelectric power station can be improved, classical and modern controllers are applied to simulated models of the Dinorwig power plant. These include PID, fuzzy approximation, feed-forward and model-based predictive control with linear and hybrid prediction models. Mod...

  18. Development activities, challenges and prospects for the hydropower sector in Austria

    Science.gov (United States)

    Wagner, Beatrice; Hauer, Christoph; Habersack, Helmut

    2017-04-01

    This contribution intends to give an overview of hydropower development activities in Austria and deepen the knowledge on actual strategies and planning documents. Thereby, the focus is on a climate and energy policy based perspective, also analyzing economic trends at the hydropower sector due to energy market changes in the last years. This includes a comparison with other political strategies and programs dealing with hydropower exploitation based on selected countries. With respect to technology developments, a concise review on technological innovations, such as hydrokinetic energy conversion systems, and new constructive designs of conventional hydropower plants in Austria will be given. Moreover, potential impacts on environment and aquatic ecosystems are described. Finally, key challenges and prospects will be identified and discussed.

  19. A multi-scale spatial approach to address environmental effects of small hydropower development.

    Science.gov (United States)

    McManamay, Ryan A; Samu, Nicole; Kao, Shih-Chieh; Bevelhimer, Mark S; Hetrick, Shelaine C

    2015-01-01

    Hydropower development continues to grow worldwide in developed and developing countries. While the ecological and physical responses to dam construction have been well documented, translating this information into planning for hydropower development is extremely difficult. Very few studies have conducted environmental assessments to guide site-specific or widespread hydropower development. Herein, we propose a spatial approach for estimating environmental effects of hydropower development at multiple scales, as opposed to individual site-by-site assessments (e.g., environmental impact assessment). Because the complex, process-driven effects of future hydropower development may be uncertain or, at best, limited by available information, we invested considerable effort in describing novel approaches to represent environmental concerns using spatial data and in developing the spatial footprint of hydropower infrastructure. We then use two case studies in the US, one at the scale of the conterminous US and another within two adjoining rivers basins, to examine how environmental concerns can be identified and related to areas of varying energy capacity. We use combinations of reserve-design planning and multi-metric ranking to visualize tradeoffs among environmental concerns and potential energy capacity. Spatial frameworks, like the one presented, are not meant to replace more in-depth environmental assessments, but to identify information gaps and measure the sustainability of multi-development scenarios as to inform policy decisions at the basin or national level. Most importantly, the approach should foster discussions among environmental scientists and stakeholders regarding solutions to optimize energy development and environmental sustainability.

  20. Private equity, public affair: Hydropower financing in the Mekong Basin

    NARCIS (Netherlands)

    Merme, V.; Ahlers, R.; Gupta, J.

    2014-01-01

    Large-scale hydropower development is increasingly popular. Although international finance is a significant driver of hydropower market expansion, financial data is relatively obscure and literature remains scarce. This article tracks the financial process in hydropower development in the Mekong

  1. Surge Tank Atlas for Hydropower Plants

    OpenAIRE

    Sandvåg, Simon Utseth

    2016-01-01

    The objective of this master's thesis is to describe the existing surge tank solutions and additional improvements, and to simulate the hydraulic behavior of the surge tanks and how it affects the hydropower plant. The high head hydropower plant Torpa and the low head hydropower plant Åna-Sira are used for the case study, thus the surge tanks can be simulated under different hydraulic conditions. Turbine pressures and mass oscillations after a complete turbine shutdown, and turbine regulation...

  2. Pumped Storage and Potential Hydropower from Conduits

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2015-02-25

    Th is Congressional Report, Pumped Storage Hydropower and Potential Hydropower from Conduits, addresses the technical flexibility that existing pumped storage facilities can provide to support intermittent renewable energy generation. This study considered potential upgrades or retrofit of these facilities, the technical potential of existing and new pumped storage facilities to provide grid reliability benefits, and the range of conduit hydropower opportunities available in the United States.

  3. Methane Ebullition in Temperate Hydropower Reservoirs and Implications for US Policy on Greenhouse Gas Emissions

    Science.gov (United States)

    Miller, Benjamin L.; Arntzen, Evan V.; Goldman, Amy E.; Richmond, Marshall C.

    2017-10-01

    The United States is home to 2198 dams actively used for hydropower production. With the December 2015 consensus adoption of the United Nations Framework Convention on Climate Change Paris Agreement, it is important to accurately quantify anthropogenic greenhouse gas emissions. Methane ebullition, or methane bubbles originating from river or lake sediments, has been shown to account for nearly all methane emissions from tropical hydropower reservoirs to the atmosphere. However, distinct ebullitive methane fluxes have been studied in comparatively few temperate hydropower reservoirs globally. This study measures ebullitive and diffusive methane fluxes from two eastern Washington reservoirs, and synthesizes existing studies of methane ebullition in temperate, boreal, and tropical hydropower reservoirs. Ebullition comprises nearly all methane emissions (>97%) from this study's two eastern Washington hydropower reservoirs to the atmosphere. Summer methane ebullition from these reservoirs was higher than ebullition in six southeastern U.S. hydropower reservoirs, however it was similar to temperate reservoirs in other parts of the world. Our literature synthesis suggests that methane ebullition from temperate hydropower reservoirs can be seasonally elevated compared to tropical climates, however annual emissions are likely to be higher within tropical climates, emphasizing the possible range of methane ebullition fluxes and the need for the further study of temperate reservoirs. Possible future changes to the Intergovernmental Panel on Climate Change and UNFCCC guidelines for national greenhouse gas inventories highlights the need for accurate assessment of reservoir emissions.

  4. EPRI-DOE Conference on Environmentally-Enhanced Hydropower Turbines: Technical Papers

    Energy Technology Data Exchange (ETDEWEB)

    Hogan, T. [Alden Research Laboratory, Inc., Holden, MA (United States)

    2011-12-01

    The EPRI-DOE Conference on Environmentally-Enhanced Hydropower Turbines was a component of a larger project. The goal of the overall project was to conduct the final developmental engineering required to advance the commercialization of the Alden turbine. As part of this effort, the conference provided a venue to disseminate information on the status of the Alden turbine technology as well as the status of other advanced turbines and research on environmentally-friendly hydropower turbines. The conference was also a product of a federal Memorandum of Understanding among DOE, USBR, and USACE to share technical information on hydropower. The conference was held in Washington, DC on May 19 and 20, 2011 and welcomed over 100 attendees. The Conference Organizing Committee included the federal agencies with a vested interest in hydropower in the U.S. The Committee collaboratively assembled this conference, including topics from each facet of the environmentally-friendly conventional hydropower research community. The conference was successful in illustrating the readiness of environmentally-enhanced hydropower technologies. Furthermore, the topics presented illustrated the need for additional deployment and field testing of these technologies in an effort to promote the growth of environmentally sustainable hydropower in the U.S. and around the world.

  5. A procedure for assessing climate change impacts on hydropower

    Energy Technology Data Exchange (ETDEWEB)

    Hamududu, B.; Jjunju, E.; Killingtveit, Aa.; Alfredsen, K.

    2010-07-01

    Full text: Ever since climate change was highlighted as an important issue in water related projects, various procedures have been used by different researchers to gain indications of likely impact of climate change on hydropower. Though all methods give results, comparisons of these results is not ideal and may be difficult due to large differences in methods used. This paper is an attempt to propose an ideal procedure or process of estimating the impact of climate change on hydropower production in a basin. The paper describes where to begin, what future climate change projections are necessary, and where to get such data. It also shows highlights various techniques that are available and could be applied to climate projections in order to down scale the large scale projections from global climate models to site or basin climate. Another technique that has been applied is the delta approach or perturbation methods that transfer changes in meteorological variables between the control and the scenario simulations from the regional climate model to a database of observed meteorological data. Further it highlights various ways of transforming basin climate variables that can be used in hydrological modeling to produce runoff series. The paper also discusses applicability of hydrological modeling strategies for climate predictions in relation to stationarity in models and how this will influence climate predictions. The runoff is the input into hydropower systems and hydropower simulations to get the desired hydropower production in the future. In all these steps, different approaches for processing are highlighted. The paper ends with a section on different sources of uncertainties in climate projections. Finally some concluding remarks are given on the reliability of the results from various methodologies. A case study on Zambezi River basin is given towards the end illustrating the differences resulting from different methodologies. (Author)

  6. Managing Mekong Mud and its Impact on Fish, Hydropower and People

    Science.gov (United States)

    Wild, T. B.; Loucks, D. P.

    2013-12-01

    The Lancang/Mekong River flows from the Tibetan Plateau through the Upper Mekong Basin in China (where it is called the Lancang Jiang) to the Lower Mekong Basin (LMB) in Myanmar, Laos, Thailand, Cambodia, and Vietnam, before discharging into the South China Sea. The river has remained largely unaltered for much of its history, but today hydropower reservoirs are being designed and developed at a rapid pace. Some 60 million people living in the basin have depended on the basin's ecosystems to produce much of their food and income. The health and productivity of the ecosystems are dependent upon the river's natural flow and sediment regimes, both of which could be significantly altered by the rapid construction of dams. This presentation focuses on the potential impacts of dam development and alternative sediment management options, where feasible, including flushing, sluicing, bypassing, and density current venting. We evaluate whether these techniques can improve reservoir sediment outflows without damaging the environmental system we are attempting to preserve. We also evaluate the accompanying losses in hydropower production necessary to achieve the improved sediment passage. This study focuses on dams in China, Cambodia, Laos and Vietnam, both on the mainstream Mekong River and on its tributaries. A sediment simulation model was developed specifically to conduct these evaluations. This model implements a daily time-step mass-balance simulation of flow and sediment to predict the spatial and temporal accumulation, depletion, and distribution of sediment in river reaches and in reservoirs under different flow and sediment management policies. Results of simulations suggest that more benign (with regard to sediment) alternatives to the currently proposed locations and designs of dams exist and should be considered. While sediment management alternatives have the potential to increase sediment loads discharged downstream, careful attention must be paid to the

  7. Virtual Factory Framework for Supporting Production Planning and Control.

    Science.gov (United States)

    Kibira, Deogratias; Shao, Guodong

    2017-01-01

    Developing optimal production plans for smart manufacturing systems is challenging because shop floor events change dynamically. A virtual factory incorporating engineering tools, simulation, and optimization generates and communicates performance data to guide wise decision making for different control levels. This paper describes such a platform specifically for production planning. We also discuss verification and validation of the constituent models. A case study of a machine shop is used to demonstrate data generation for production planning in a virtual factory.

  8. Integrated management of the Blue Nile Basin in Ethiopia: Hydropower and irrigation modeling

    OpenAIRE

    Block, Paul J.

    2007-01-01

    "Ethiopia is at a critical crossroads with a large and increasing population, a depressed national economy, insufficient agricultural production, and a low number of developed energy sources. The upper Blue Nile basin harbors considerable untapped potential for irrigation and hydropower development and expansion. Numerous hydrologic models have been developed to assess hydropower and agricultural irrigation potential within the basin, yet often fail to adequately address critical aspects, inc...

  9. Modular Hydropower Engineering and Pilot Scale Manufacturing

    Energy Technology Data Exchange (ETDEWEB)

    Chesser, Phillip C. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2017-09-01

    Emrgy has developed, prototyped and tested a modular hydropower system for renewable energy generation. ORNL worked with Emrgy to demonstrate the use of additive manufacturing in the production of the hydrofoils and spokes for the hydrokinetic system. Specifically, during Phase 1 of this effort, ORNL printed and finished machined patterns for both the hydrofoils and spokes that were subsequently used in a sand casting manufacturing process. Emrgy utilized the sand castings for a pilot installation in Denver, CO, where the parts represented an 80% cost savings from the previous prototype build that was manufactured using subtractive manufacturing. In addition, the castings were completed with ORNL’s newly developed AlCeMg alloy that will be tested for performance improvements including higher corrosion resistance in a water application than the 6160 alloy used previously

  10. When and how to activate large new hydropower reservoirs

    Science.gov (United States)

    Geressu, Robel; Harou, Julien

    2016-04-01

    Water resources system planners are increasingly required to address multiple long and short-term management objectives and the trade-offs these imply. Expansion planning in hydropower reservoir systems, where assets either temporarily or permanently reduce each other's performance, is a complex and potentially conflictual task requiring attention to multiple impacts. This paper proposes a multi-criteria scheduling approach considering many objectives and their associated uncertainties. The method considers the coordination and flexibility of reservoir operation in different expansion stages. The impact of abstraction (i.e., during filling of new reservoirs) and regulation of inflows by upstream reservoirs, is represented by simultaneously optimizing the storage size of reservoirs. Sensitivity analysis of performance given financial uncertainty and hydrological variability reveals which expansion schedules are robust to a wide range of future conditions. This informs how alternative designs compare in multiple performance dimensions and can serve stakeholders with differing attitudes towards risk and opportunity. The method is applied to proposed Blue Nile hydropower reservoirs to find efficient new dam activation schedules considering energy revenues, downstream release requirements, and energy generation during reservoir filling periods. Results take the form of Pareto-optimal trade-offs where each point on the curve or surface represents asset choices, size, activation date, and filling period reservoir operating rules. The results help explore the complex planning and management issues involved in the Blue Nile and demonstrate a possible approach to negotiate the design, filling and coordinated use of hydropower reservoirs.

  11. The blue water footprint of electricity from hydropower

    Directory of Open Access Journals (Sweden)

    M. M. Mekonnen

    2012-01-01

    Full Text Available Hydropower accounts for about 16% of the world's electricity supply. It has been debated whether hydroelectric generation is merely an in-stream water user or whether it also consumes water. In this paper we provide scientific support for the argument that hydroelectric generation is in most cases a significant water consumer. The study assesses the blue water footprint of hydroelectricity – the water evaporated from manmade reservoirs to produce electric energy – for 35 selected sites. The aggregated blue water footprint of the selected hydropower plants is 90 Gm3 yr−1, which is equivalent to 10% of the blue water footprint of global crop production in the year 2000. The total blue water footprint of hydroelectric generation in the world must be considerably larger if one considers the fact that this study covers only 8% of the global installed hydroelectric capacity. Hydroelectric generation is thus a significant water consumer. The average water footprint of the selected hydropower plants is 68 m3 GJ−1. Great differences in water footprint among hydropower plants exist, due to differences in climate in the places where the plants are situated, but more importantly as a result of large differences in the area flooded per unit of installed hydroelectric capacity. We recommend that water footprint assessment is added as a component in evaluations of newly proposed hydropower plants as well as in the evaluation of existing hydroelectric dams, so that the consequences of the water footprint of hydroelectric generation on downstream environmental flows and other water users can be evaluated.

  12. IMPROVEMENT OF PRODUCTION PLANNING IN COMPANY PARS KOMPONENTY

    Directory of Open Access Journals (Sweden)

    René Klega

    2014-03-01

    Full Text Available The article analyzes the current status of production planning in company Pars Komponenty s.r.o., proposes a new method of planning based on application of the principle of MRP. It is a discrete type of production with high complexity of BOM and MTO (Make-to-Order and ETO (Engineering-to-Order from the point of decoupling point. The original planning system plans according to production capacity backward without collisions, but for a given type of production does not work in practice. Planning system was analyzed and the main problems were identified, which were high work in progress and material stocks. This article target is to propose a new planining system based on the inclusion of time reserves of purchased material items. New planning system was tested in practise with benefit in reducing both the material inventory and work in progress.

  13. The water footprint of electricity from hydropower

    NARCIS (Netherlands)

    Mekonnen, Mesfin; Hoekstra, Arjen Ysbert

    Hydropower accounts for about 16% of the world’s electricity supply. Although dams often have big environmental and social impacts, proponents of hydropower regard it as a comparatively clean, low-cost and renewable form of energy. It has been debated whether hydroelectric generation is merely an

  14. Disappearing rivers — The limits of environmental assessment for hydropower in India

    Energy Technology Data Exchange (ETDEWEB)

    Erlewein, Alexander, E-mail: erlewein@sai.uni-heidelberg.de

    2013-11-15

    The mountain rivers of the Indian Himalaya possess a vast potential for hydropower generation. After decades of comparatively modest development recent years have seen a major intensification in the construction of new hydropower dams. Although increasingly portrayed as a form of renewable energy generation, hydropower development may lead to extensive alterations of fluvial systems and conflicts with resource use patterns of local communities. To appraise and reduce adverse effects is the purpose of statutory Environmental Impact Assessments (EIA) and corresponding mitigation plans. However, in the light of ambitious policies for hydropower expansion conventional approaches of environmental assessment are increasingly challenged to keep up with the intensity and pace of development. This paper aims to explore the systemic limitations of environmental assessment for hydropower development in the Indian state of Himachal Pradesh. Based on a qualitative methodology involving interviews with environmental experts, document reviews and field observations the study suggests that the current practice of constraining EIAs to the project level fails to address the larger effects of extensive hydropower development. Furthermore, it is critically discussed as to what extent the concept of Strategic Environmental Assessment (SEA) might have the potential to overcome existing shortcomings.

  15. System dynamics in hydropower plants

    Energy Technology Data Exchange (ETDEWEB)

    Stuksrud, Dag Birger

    1998-12-31

    The main purpose of this thesis on system dynamics in hydropower plants was to establish new models of a hydropower system where the turbine/conduits and the electricity supply and generation are connected together as one unit such that possible interactions between the two power regimes can be studied. In order to describe the system dynamics as well as possible, a previously developed analytic model of high-head Francis turbines is improved. The model includes the acceleration resistance in the turbine runner and the draft tube. Expressions for the loss coefficients in the model are derived in order to obtain a purely analytic model. The necessity of taking the hydraulic inertia into account is shown by means of simulations. Unstable behaviour and a higher transient turbine speed than expected may occur for turbines with steep characteristics or large draft tubes. The turbine model was verified previously with respect to a high-head Francis turbine; the thesis performs an experimental verification on a low-head Francis turbine and compares the measurements with simulations from the improved turbine model. It is found that the dynamic turbine model is, after adjustment, capable of describing low-head machines as well with satisfying results. The thesis applies a method called the ``Limited zero-pole method`` to obtain new rational approximations of the elastic behaviour in the conduits with frictional damping included. These approximations are used to provide an accurate state space formulation of a hydropower plant. Simulations performed with the new computer programs show that hydraulic transients such as water-hammer and mass oscillations are reflected in the electric grid. Unstable governing performance in the electric and hydraulic parts also interact. This emphasizes the need for analysing the whole power system as a unit. 63 refs., 149 figs., 4 tabs.

  16. Simulation of production and sales planning in refinery operations

    OpenAIRE

    Bredström, David; Flisberg, Patrik; Rönnqvist, Mikael

    2008-01-01

    In this paper we discuss some computational experiments on simulating refinery operations. We compare an integrated approach with recursively solving a production planning and sales planning problem. We test two different descriptions of the demand behaviour. The first is based on a fixed lower and upper limit and the second on a demand that varies with the product price. We also test the impact of different number of time periods in the planning horizon. We simulate the behaviour when detail...

  17. Environmental certification for small hydropower plants; Umweltzertifizierung Kleinwasserkraftwerke

    Energy Technology Data Exchange (ETDEWEB)

    Truffer, B.; Meier, W.; Vollenweider, S. [Eidgenoessische Anstalt fuer Wasserversorgung, Abwasserreinigung und Gewaesserschutz (EAWAG), Kastanienbaum (Switzerland); Seiler, B.; Dettli, R. [Econcept AG, Zuerich (Switzerland)

    2001-07-01

    This report for the Swiss Federal Institute for Environmental Science and Technology describes product-differentiation options for small hydropower plant in Switzerland and proposes a form of differentiation based on ecological characteristics as a promising market strategy. The labels created in various countries to assure customers of the environmental compatibility of 'green' power production are looked at. In particular, the implications for small hydropower plant associated with the Swiss green power labelling procedure introduced by the Association for the Promotion of Environmentally Sound Electricity (VUE) are discussed. The report proposes a simplified procedure for these small power stations and presents a sample calculation for the overall costs of certification. The report is rounded off with four detailed case studies in which the necessary upgrades to the plant and associated costs are discussed in detail.

  18. U.S. Hydropower Resource Assessment - California

    Energy Technology Data Exchange (ETDEWEB)

    A. M. Conner; B. N. Rinehart; J. E. Francfort

    1998-10-01

    The U.S. Department of Energy is developing an estimate of the underdeveloped hydropower potential in the United States. For this purpose, the Idaho National Engineering and Environmental Laboratory developed a computer model called Hydropower Evaluation Software (HES). HES measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of California.

  19. US hydropower resource assessment for Montana

    Energy Technology Data Exchange (ETDEWEB)

    Francfort, J.E.

    1993-12-01

    The Department of Energy is developing an estimate of the hydropower development potential in this country. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE menu-driven software application that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the state of Montana.

  20. US hydropower resource assessment for New Hampshire

    Energy Technology Data Exchange (ETDEWEB)

    Francfort, J.E.

    1995-07-01

    The Department of Energy is developing an estimate of the undeveloped hydropower potential in this country. The Hydropower Evaluation Software is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The software measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven software program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of New Hampshire.

  1. US hydropower resource assessment for New Jersey

    Energy Technology Data Exchange (ETDEWEB)

    Connor, A.M.; Francfort, J.E.

    1996-03-01

    The Department of Energy is developing an estimate of the undeveloped hydropower potential in this country. The Hydropower Evaluation Software is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The software measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven software program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of New Jersey.

  2. US hydropower resource assessment for Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Francfort, J.E.

    1994-05-01

    The US Department of Energy is developing an estimate of the hydropower development potential in this country. Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE, menu-driven software application. HES allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of Colorado.

  3. US hydropower resource assessment for Kansas

    Energy Technology Data Exchange (ETDEWEB)

    Francfort, J.E.

    1993-12-01

    The Department of Energy is developing an estimate of the hydropower development potential in this country. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The HES measures the potential hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a dBASE menu-driven software application that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the state of Kansas.

  4. Projected impacts of climate change on hydropower potential in China

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Xingcai; Tang, Qiuhong; Voisin, Nathalie; Cui, Huijuan

    2016-01-01

    Hydropower is an important renewable energy source in China, but it is sensitive to climate change, because the changing climate may alter hydrological conditions (e.g., river flow and reservoir storage). Future changes and associated uncertainties in China's gross hydropower potential (GHP) and developed hydropower potential (DHP) are projected using simulations from eight global hydrological models (GHMs), including a large-scale reservoir regulation model, forced by five general circulation models (GCMs) with climate data under two representative concentration pathways (RCP2.6 and RCP8.5). Results show that the estimation of the present GHP of China is comparable to other studies; overall, the annual GHP is projected to change by −1.7 to 2 % in the near future (2020–2050) and increase by 3 to 6 % in the late 21st century (2070–2099). The annual DHP is projected to change by −2.2 to −5.4 % (0.7–1.7 % of the total installed hydropower capacity (IHC)) and −1.3 to −4 % (0.4–1.3 % of total IHC) for 2020–2050 and 2070–2099, respectively. Regional variations emerge: GHP will increase in northern China but decrease in southern China – mostly in south central China and eastern China – where numerous reservoirs and large IHCs currently are located. The area with the highest GHP in southwest China will have more GHP, while DHP will reduce in the regions with high IHC (e.g., Sichuan and Hubei) in the future. The largest decrease in DHP (in %) will occur in autumn or winter, when streamflow is relatively low and water use is competitive. Large ranges in hydropower estimates across GHMs and GCMs highlight the necessity of using multimodel assessments under climate change conditions. This study prompts the consideration of climate change in planning for hydropower development and operations in China, to be further combined with a socioeconomic analysis for strategic expansion.

  5. Productivity and Performance through Marketing Planning

    Directory of Open Access Journals (Sweden)

    Cristian Morozan

    2008-11-01

    Full Text Available In the marketing area, planning might be defined as an anticipation process of those changes that affect the market and as an elaboration process of the corresponding action means. It will result in a marketing plan, which might be tactical (short-term period, spread on a period of time that might vary from six months to one year, or a strategic (long-term, spread on a period of time of three to ten years. Planning means building action programs in which the objectives, the set financing method or the steps of achieving it should be clearly defined. Marketing planning also proves to be important for its liaison between what the company can offer and the consumers’ needs and expectations.

  6. Optimization of cascade hydropower system operation by genetic algorithm to maximize clean energy output

    Directory of Open Access Journals (Sweden)

    Aida Tayebiyan

    2016-06-01

    Full Text Available Background: Several reservoir systems have been constructed for hydropower generation around the world. Hydropower offers an economical source of electricity with reduce carbon emissions. Therefore, it is such a clean and renewable source of energy. Reservoirs that generate hydropower are typically operated with the goal of maximizing energy revenue. Yet, reservoir systems are inefficiently operated and manage according to policies determined at the construction time. It is worth noting that with little enhancement in operation of reservoir system, there could be an increase in efficiency of the scheme for many consumers. Methods: This research develops simulation-optimization models that reflect discrete hedging policy (DHP to manage and operate hydropower reservoir system and analyse it in both single and multireservoir system. Accordingly, three operational models (2 single reservoir systems and 1 multi-reservoir system were constructed and optimized by genetic algorithm (GA. Maximizing the total power generation in horizontal time is chosen as an objective function in order to improve the functional efficiency in hydropower production with consideration to operational and physical limitations. The constructed models, which is a cascade hydropower reservoirs system have been tested and evaluated in the Cameron Highland and Batang Padang in Malaysia. Results: According to the given results, usage of DHP for hydropower reservoir system operation could increase the power generation output to nearly 13% in the studied reservoir system compared to present operating policy (TNB operation. This substantial increase in power production will enhance economic development. Moreover, the given results of single and multi-reservoir systems affirmed that hedging policy could manage the single system much better than operation of the multi-reservoir system. Conclusion: It can be summarized that DHP is an efficient and feasible policy, which could be used

  7. A model for marketing planning for new products

    DEFF Research Database (Denmark)

    Martensen, Anne

    1993-01-01

    awareness model. The model can be used to generate improved marketing plans. In this connection, it is important that the model includes the marketing variables, for it is only in this way that the model can be used for marketing plan optimization. It is predicted that a future direction of development...... and use of sales forecasting models for new products will be within optimization of the marketing plan for launching a new product, and not only as a tool for forecasting sales for just one marketing plan....

  8. Automobile Marketing Strategies, Pricing, and Product Planning

    Science.gov (United States)

    1978-04-01

    The objective of the study was to determine the decision-making processes concerning major model year product introductions and alterations in the automotive industry as well as to investigate techniques of price positioning, product and image positi...

  9. Production Planning with Load Dependent Lead Times

    DEFF Research Database (Denmark)

    Pahl, Julia

    2005-01-01

    Lead times impact the performance of the supply chain significantly. Although there is a large literature concerning queuing models for the analysis of the relationship between capacity utilization and lead times, and there is a substantial literature concerning control and order release policies...... that take lead times into consideration, there have been only few papers describing models at the aggregate planning level that recognize the relationship between the planned utilization of capacity and lead times. In this paper we provide an in-depth discussion of the state-of-the art in this literature...

  10. Examining global electricity supply vulnerability to climate change using a high-fidelity hydropower dam model.

    Science.gov (United States)

    Turner, Sean W D; Ng, Jia Yi; Galelli, Stefano

    2017-07-15

    An important and plausible impact of a changing global climate is altered power generation from hydroelectric dams. Here we project 21st century global hydropower production by forcing a coupled, global hydrological and dam model with three General Circulation Model (GCM) projections run under two emissions scenarios. Dams are simulated using a detailed model that accounts for plant specifications, storage dynamics, reservoir bathymetry and realistic, optimized operations. We show that the inclusion of these features can have a non-trivial effect on the simulated response of hydropower production to changes in climate. Simulation results highlight substantial uncertainty in the direction of change in globally aggregated hydropower production (~-5 to +5% change in mean global production by the 2080s under a high emissions scenario, depending on GCM). Several clearly impacted hotspots are identified, the most prominent of which encompasses the Mediterranean countries in southern Europe, northern Africa and the Middle East. In this region, hydropower production is projected to be reduced by approximately 40% on average by the end of the century under a high emissions scenario. After accounting for each country's dependence on hydropower for meeting its current electricity demands, the Balkans countries emerge as the most vulnerable (~5-20% loss in total national electricity generation depending on country). On the flipside, a handful of countries in Scandinavia and central Asia are projected to reap a significant increase in total electrical production (~5-15%) without investing in new power generation facilities. Copyright © 2017 Elsevier B.V. All rights reserved.

  11. The Grossmatt hydro-power station; Wasserkraftwerk Grossmatt. Konzessionsprojekt

    Energy Technology Data Exchange (ETDEWEB)

    Hintermann, M.

    2006-07-01

    This final report for the Swiss Federal Office of Energy (SFOE) presents the project for a small hydropower station on the Birs river in north-western Switzerland. The report reviews the history of the project, in which a new 385 kW-hydro-power station at the site of an earlier installation is foreseen. Details are presented on the investigations made and on the co-ordination with the owners of the hydro-power station situated up-river, the local power utility and the local authorities. Also, the requirements placed on the project by the fishing authorities are quoted and the solution foreseen is described. Also discussed are the requirements placed on the project by legislation on environmental impact and flood protection. Figures on electrical energy production and building costs are presented.

  12. Small hydropower station in Lavin - Preliminary study; Kleinwasserkraftwerk Lavin - Vorstudie

    Energy Technology Data Exchange (ETDEWEB)

    Merz, F.

    2008-05-15

    This illustrated final report for the Swiss Federal Office of Energy (SFOE) presents the results of a preliminary study regarding a proposed small hydropower installation on the alpine river Lavinuoz in Lavin, Switzerland. The geographical situation with mountains and glaciers in the catchment area of the proposed hydropower installation is discussed as are the appropriate water catchment installations. Possible dangers caused by avalanches and rock fall are examined. The power to be produced - 5,500,000 kWh/y - by the turbine which is nominally rated at 1350 kW is discussed, as are estimates of production costs. Figures on the investments required and the economic feasibility of the project are discussed, as are environmental factors that are to be taken into account.

  13. An Associative Entrepreneurship Productive Plan (Un plan de prendimiento productivo

    Directory of Open Access Journals (Sweden)

    Johnny Poveda Mora

    2012-11-01

    Full Text Available En el mundo de hoy, existe un comportamiento dinámico que se ha convertido en una característica permanente para obtener la expansión de los mercados, que requiere de mucho esfuerzo para cambiar el pensamiento gubernamental con políticas sociales y emprendimientos que durante mucho tiempo han unido con su estrategia. La productividad es la respuesta, pero en el sentido más amplio de una actitud mental. La productividad fomenta el mejoramiento continuo y representa la clave para competir exitosamente en el mundo globalizado de hoy. Al formular opciones específicas para incrementar la productividad, hemos tomado en consideración la responsabilidad social y el bienestar humano que recientemente han aumentado de importancia. Con el movimiento hacia la productividad, una región se garantiza el crecimiento económico, fomenta el emprendedurismo y las capacidades de las PYMEs, y por tanto aumenta las posibilidades de empleo. Con este fin se ejecutó una investigación con participación activa, para el desarrollo de una estructura denominada Arreglos de Producción Local que se aplicó en Frailes, una región costarricense basada históricamente en la producción cafetalera. Al respecto, fue desarrollada una alternativa económica para la región por parte de amas de casa que jugaron un papel predominante en el desarrollo de las economías domésticas mediante la creación de PYMEs. ABSTRACT In today´s world, there is a dynamic behavior that becomes a constant feature in order to reach market expansion; it requires a lot of effort to change the way of government thinking with the social policies and enterprises that have been engaged with strategies for a long time. Productivity is the answer but in a broader point of view, productivity is a state of mind. It fosters continuous improvement and represents the key to succeed competing in today´s globalized world. In formulating specific measures for productivity improvement we also took into

  14. Short-Term Planning of Hybrid Power System

    Science.gov (United States)

    Knežević, Goran; Baus, Zoran; Nikolovski, Srete

    2016-07-01

    In this paper short-term planning algorithm for hybrid power system consist of different types of cascade hydropower plants (run-of-the river, pumped storage, conventional), thermal power plants (coal-fired power plants, combined cycle gas-fired power plants) and wind farms is presented. The optimization process provides a joint bid of the hybrid system, and thus making the operation schedule of hydro and thermal power plants, the operation condition of pumped-storage hydropower plants with the aim of maximizing profits on day ahead market, according to expected hourly electricity prices, the expected local water inflow in certain hydropower plants, and the expected production of electrical energy from the wind farm, taking into account previously contracted bilateral agreement for electricity generation. Optimization process is formulated as hourly-discretized mixed integer linear optimization problem. Optimization model is applied on the case study in order to show general features of the developed model.

  15. Effects of parallel planning on agreement production

    NARCIS (Netherlands)

    Veenstra, A.; Meyer, A.S.; Acheson, D.J.

    2015-01-01

    An important issue in current psycholinguistics is how the time course of utterance planning affects the generation of grammatical structures. The current study investigated the influence of parallel activation of the components of complex noun phrases on the generation of subject-verb agreement.

  16. The role of energy systems on hydropower in Turkey

    Directory of Open Access Journals (Sweden)

    Yuksel Ibrahim

    2017-01-01

    Full Text Available Over the last two decades, global electricity production has more than doubled and electricity demand is rising rapidly around the world as economic development spreads to emerging economies. Not only has electricity demand increased significantly, it is the fastest growing end-use of energy. Therefore, technical, economic and environmental benefits of hydroelectric power make it an important contributor to the future world energy mix, particularly in the developing countries. On the other hand, the hydropower industry is closely linked to both water management and renewable energy production, and so has a unique role to play in contributing to sustainable development in a world where billions of people lack access to safe drinking water and adequate energy supplies. In addition to, approximately 1.6 billion people have no access to electricity and about 1.1 billion are without adequate water supply. However, resources for hydropower development are widely spread around the world. Potential exists in about 150 countries, and about 70% of the economically feasible potential remains to be developed-mostly in developing countries where the needs are most urgent. This paper deals with renewable energy systems and the role of hydropower in Turkey.

  17. The role of energy systems on hydropower in Turkey

    Science.gov (United States)

    Yuksel, Ibrahim; Arman, Hasan; Halil Demirel, Ibrahim

    2017-11-01

    Over the last two decades, global electricity production has more than doubled and electricity demand is rising rapidly around the world as economic development spreads to emerging economies. Not only has electricity demand increased significantly, it is the fastest growing end-use of energy. Therefore, technical, economic and environmental benefits of hydroelectric power make it an important contributor to the future world energy mix, particularly in the developing countries. On the other hand, the hydropower industry is closely linked to both water management and renewable energy production, and so has a unique role to play in contributing to sustainable development in a world where billions of people lack access to safe drinking water and adequate energy supplies. In addition to, approximately 1.6 billion people have no access to electricity and about 1.1 billion are without adequate water supply. However, resources for hydropower development are widely spread around the world. Potential exists in about 150 countries, and about 70% of the economically feasible potential remains to be developed-mostly in developing countries where the needs are most urgent. This paper deals with renewable energy systems and the role of hydropower in Turkey.

  18. Production planning development and paradigm integration

    OpenAIRE

    Galina Ledneva; Viktor Jludov; Alexander Pesin; Viktor Salganik; Vladimir Shmakov

    2009-01-01

    The paper reviews principles of different concepts of enterprise management including a theory of constrains, a Balanced Scorecard, lean production, Six Sigma. The authors believe that creating some mix or integration of these paradigms can bring extraordinary effect for production management. As example the modified Balanced Scorecard based on constraints and its application on Magnitorsk metallurgical enterprise in Russia is described.

  19. Hybrid MTO-MTS production planning : An explorative study

    NARCIS (Netherlands)

    Beemsterboer, Bart; Land, Martin; Teunter, Ruud

    2016-01-01

    Research on the planning and control of combined make-to-order/make-to-stock or hybrid production systems often takes a typical MTO or MTS perspective. We examine the benefits of a hybrid planning approach without priority for either MTO or MTS. We develop a Markov Decision Process model for a

  20. Multi-product dynamic advertisement planning in a segmented market

    National Research Council Canada - National Science Library

    Aggarwal Sugandha; Gupta Anshu; Kaul Arshia; Krishnamoorthy Mohan; Jha P.C

    2017-01-01

    ... a firm’s advertising budget among multiple products and media in a segmented market. To make the media plan responsive to the changes in the market, the distribution is carried out dynamically by dividing the planning horizon into smaller periods...

  1. Production planning under dynamic product environment : a multi-objective goal programming approach

    NARCIS (Netherlands)

    Chowdary, B.V.; Slomp, J.

    2002-01-01

    Production planning is a complicated task that requires cooperation among multiple functional units in any organization. In order to design an efficient production planning system, a good understanding of the environment in terms of customers, products and manufacturing processes is a must. Although

  2. Fish Processed Production Planning Using Integer Stochastic Programming Model

    Science.gov (United States)

    Firmansyah, Mawengkang, Herman

    2011-06-01

    Fish and its processed products are the most affordable source of animal protein in the diet of most people in Indonesia. The goal in production planning is to meet customer demand over a fixed time horizon divided into planning periods by optimizing the trade-off between economic objectives such as production cost and customer satisfaction level. The major decisions are production and inventory levels for each product and the number of workforce in each planning period. In this paper we consider the management of small scale traditional business at North Sumatera Province which performs processing fish into several local seafood products. The inherent uncertainty of data (e.g. demand, fish availability), together with the sequential evolution of data over time leads the production planning problem to a nonlinear mixed-integer stochastic programming model. We use scenario generation based approach and feasible neighborhood search for solving the model. The results which show the amount of each fish processed product and the number of workforce needed in each horizon planning are presented.

  3. Multi-product dynamic advertisement planning in a segmented market

    Directory of Open Access Journals (Sweden)

    Aggarwal Sugandha

    2017-01-01

    Full Text Available In this paper, a dynamic multi-objective linear integer programming model is proposed to optimally distribute a firm’s advertising budget among multiple products and media in a segmented market. To make the media plan responsive to the changes in the market, the distribution is carried out dynamically by dividing the planning horizon into smaller periods. The model incorporates the effect of the previous period advertising reach on the current period (taken through retention factor, and it also considers cross-product effect of simultaneously advertising different products. An application of the model is presented for an insurance firm that markets five different products, using goal programming approach.

  4. Hydropower Manufacturing and Supply Chain Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Cotrell, Jason R [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2018-01-02

    Hydropower Manufacturing and Supply Chain Analysis presentation from the WPTO FY14-FY16 Peer Review. The project objective is to provide data and insights to inform investment strategies, policy, and other decisions to promote economic growth and manufacturing.

  5. Effects of parallel planning on agreement production.

    Science.gov (United States)

    Veenstra, Alma; Meyer, Antje S; Acheson, Daniel J

    2015-11-01

    An important issue in current psycholinguistics is how the time course of utterance planning affects the generation of grammatical structures. The current study investigated the influence of parallel activation of the components of complex noun phrases on the generation of subject-verb agreement. Specifically, the lexical interference account (Gillespie & Pearlmutter, 2011b; Solomon & Pearlmutter, 2004) predicts more agreement errors (i.e., attraction) for subject phrases in which the head and local noun mismatch in number (e.g., the apple next to the pears) when nouns are planned in parallel than when they are planned in sequence. We used a speeded picture description task that yielded sentences such as the apple next to the pears is red. The objects mentioned in the noun phrase were either semantically related or unrelated. To induce agreement errors, pictures sometimes mismatched in number. In order to manipulate the likelihood of parallel processing of the objects and to test the hypothesized relationship between parallel processing and the rate of agreement errors, the pictures were either placed close together or far apart. Analyses of the participants' eye movements and speech onset latencies indicated slower processing of the first object and stronger interference from the related (compared to the unrelated) second object in the close than in the far condition. Analyses of the agreement errors yielded an attraction effect, with more errors in mismatching than in matching conditions. However, the magnitude of the attraction effect did not differ across the close and far conditions. Thus, spatial proximity encouraged parallel processing of the pictures, which led to interference of the associated conceptual and/or lexical representation, but, contrary to the prediction, it did not lead to more attraction errors. Copyright © 2015 Elsevier B.V. All rights reserved.

  6. Fuzzy multiobjective models for optimal operation of a hydropower system

    Science.gov (United States)

    Teegavarapu, Ramesh S. V.; Ferreira, André R.; Simonovic, Slobodan P.

    2013-06-01

    Optimal operation models for a hydropower system using new fuzzy multiobjective mathematical programming models are developed and evaluated in this study. The models use (i) mixed integer nonlinear programming (MINLP) with binary variables and (ii) integrate a new turbine unit commitment formulation along with water quality constraints used for evaluation of reservoir downstream impairment. Reardon method used in solution of genetic algorithm optimization problems forms the basis for development of a new fuzzy multiobjective hydropower system optimization model with creation of Reardon type fuzzy membership functions. The models are applied to a real-life hydropower reservoir system in Brazil. Genetic Algorithms (GAs) are used to (i) solve the optimization formulations to avoid computational intractability and combinatorial problems associated with binary variables in unit commitment, (ii) efficiently address Reardon method formulations, and (iii) deal with local optimal solutions obtained from the use of traditional gradient-based solvers. Decision maker's preferences are incorporated within fuzzy mathematical programming formulations to obtain compromise operating rules for a multiobjective reservoir operation problem dominated by conflicting goals of energy production, water quality and conservation releases. Results provide insight into compromise operation rules obtained using the new Reardon fuzzy multiobjective optimization framework and confirm its applicability to a variety of multiobjective water resources problems.

  7. The Development of Brazilian Municipalities Flooded by Hydropower Plants

    Science.gov (United States)

    Araujo, N.; Moretto, E. M.; Roquetti, D. R.; Beduschi, L. C.; Praia, A.; Pulice, S.; Albiach, E.; Athayde, S.

    2016-12-01

    Hydropower plants cause negative environmental impacts during the phases of construction and operation. On the other hand, there is a general assumption that these projects also induce local development of the affected places, since there is a great influx of social and financial capital brought locally, especially during the construction phase the relationship between hydropower plant implementation s and local development has been controversial in the Environmental Impact Assessment field, and there is no empirical evidence showing how hydroelectric dam construction affects local development. Considering municipal development as a kind of local development and operationalizing the concept of human development by adopting income, longevity and education dimensions defined by Amartya Sen, this study aimed to verify empirical evidences regarding the role of hydropower plants in human development of their flooded municipalities in Brazil. For this, we considered 134 hydroelectric plants and correspondent 641 flooded municipalities, for which 155 human development indicators were obtained for the period of 2000 to 2010. Results obtained from statistical correlation analysis and their assumption tests showed that increases in the municipal flooded area and increases in the period of flooding - to which a given municipality is submitted - were associated with lower performances of human development indicators. Specifically, increases in social inequality, poverty and lower performances of longevity and education were detected for the flooded municipalities. We also found that the financial compensation was associated with better performance of municipal income and lower performances of education and longevity. Finally, approaching the growth poles theory of François Perroux and the productive linkages theory of Albert Hirschman, we suggest that the size of the flooded areas, the flooding period and the financial compensation may lead to an enclave situation in

  8. Hydropower scene: boost for Dominican power supply

    Energy Technology Data Exchange (ETDEWEB)

    1988-12-01

    When it is completed in 1991, the 150 MW Jiguey-Aguacate multi-purpose hydropower scheme will be the largest hydro project in the Dominican Republic. Construction of the scheme was recommended as a result of various studies carried out by the Instituto Nacional de Recursos Hidraulicos (INDHRI), which examined the hydropower potential of the Niazo river. Work is now in progress on site, with commissioning of the first unit expected in 1990.

  9. Present situation and future prospect of hydropower in China

    Energy Technology Data Exchange (ETDEWEB)

    Huang, Hailun; Yan, Zheng [Department of Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240 (China)

    2009-08-15

    Hydropower is a clean and renewable energy source. Considering the economic, technical and environmental benefits of hydropower, most countries give priority to its development. China has the richest hydro resources on the planet with a total theoretical hydropower potential of 694 GW. Developing hydropower is of great importance to alleviate the energy crisis and environmental pollution resulting from the rapid economic growth of China in the 21st century. This paper provides a survey of hydropower development in China. Over the last five decades, China's hydropower has developed quickly. The installed capacity of hydropower is 145.26 GW presently. Some large hydropower plants have been in operation and many are still under construction, including the Three Gorges Project (TGP) and pumped-storage power stations. Small hydropower development accelerates rural electrification of this country. (author)

  10. Hydropower Resource Assessment of Brazilian Streams

    Energy Technology Data Exchange (ETDEWEB)

    Douglas G. Hall

    2011-09-01

    The Idaho National Laboratory (INL) in collaboration with the U.S. Geological Survey (USGS) with the assistance of the Empresa de Pesquisa Energetica (EPE) and the Agencia Nacional de Energia Electrica (ANEEL) has performed a comprehensive assessment of the hydropower potential of all Brazilian natural streams. The methodology by which the assessment was performed is described. The results of the assessment are presented including an estimate of the hydropower potential for all of Brazil, and the spatial distribution of hydropower potential thus providing results on a state by state basis. The assessment results have been incorporated into a geographic information system (GIS) application for the Internet called the Virtual Hydropower Prospector do Brasil. VHP do Brasil displays potential hydropower sites on a map of Brazil in the context of topography and hydrography, existing power and transportation infrastructure, populated places and political boundaries, and land use. The features of the application, which includes tools for finding and selecting potential hydropower sites and other features and displaying their attributes, is fully described.

  11. Hydropower and Water Framework Directive. Appendix 1; Wasserkraftnutzung und Wasserrahmenrichtlinien. Anhang 1

    Energy Technology Data Exchange (ETDEWEB)

    Keuneke, Rita; Dumont, Ulrich [Ingenieurbuero Floecksmuehle, Aachen (Germany)

    2011-11-15

    The contribution under consideration is the first appendix to the environmental research plan of the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (Berlin, Federal Republic of Germany) on ''Hydropower and Water Framework Directive''. This appendix contains a description of the locations in the tributaries of the German river Weser.

  12. PREDICTION OF TOTAL DISSOLVED GAS EXCHANGE AT HYDROPOWER DAMS

    Energy Technology Data Exchange (ETDEWEB)

    Hadjerioua, Boualem [ORNL; Pasha, MD Fayzul K [ORNL; Stewart, Kevin M [ORNL; Bender, Merlynn [Bureau of Reclamation; Schneider, Michael L. [U.S. Army Corps of Engineers

    2012-07-01

    Total dissolved gas (TDG) supersaturation in waters released at hydropower dams can cause gas bubble trauma in fisheries resulting in physical injuries and eyeball protrusion that can lead to mortality. Elevated TDG pressures in hydropower releases are generally caused by the entrainment of air in spillway releases and the subsequent exchange of atmospheric gasses into solution during passage through the stilling basin. The network of dams throughout the Columbia River Basin (CRB) are managed for irrigation, hydropower production, flood control, navigation, and fish passage that frequently result in both voluntary and involuntary spillway releases. These dam operations are constrained by state and federal water quality standards for TDG saturation which balance the benefits of spillway operations designed for Endangered Species Act (ESA)-listed fisheries versus the degradation to water quality as defined by TDG saturation. In the 1970s, the United States Environmental Protection Agency (USEPA), under the federal Clean Water Act (Section 303(d)), established a criterion not to exceed the TDG saturation level of 110% in order to protect freshwater and marine aquatic life. The states of Washington and Oregon have adopted special water quality standards for TDG saturation in the tailrace and forebays of hydropower facilities on the Columbia and Snake Rivers where spillway operations support fish passage objectives. The physical processes that affect TDG exchange at hydropower facilities have been studied throughout the CRB in site-specific studies and routine water quality monitoring programs. These data have been used to quantify the relationship between project operations, structural properties, and TDG exchange. These data have also been used to develop predictive models of TDG exchange to support real-time TDG management decisions. These empirically based predictive models have been developed for specific projects and account for both the fate of spillway and

  13. Production planning and coronal stop deletion in spontaneous speech

    Directory of Open Access Journals (Sweden)

    James Tanner

    2017-06-01

    Full Text Available Many phonological processes can be affected by segmental context spanning word boundaries, which often lead to variable outcomes. This paper tests the idea that some of this variability can be explained by reference to production planning. We examine coronal stop deletion (CSD, a variable process conditioned by preceding and upcoming phonological context, in a corpus of spontaneous British English speech, as a means of investigating a number of variables associated with planning: Prosodic boundary strength, word frequency, conditional probability of the following word, and speech rate. From the perspective of production planning, (1 prosodic boundaries should affect deletion rate independently of following context; (2 given the locality of production planning, the effect of the following context should decrease at stronger prosodic boundaries; and (3 other factors affecting planning scope should modulate the effect of upcoming phonological material above and beyond the modulating effect of prosodic boundaries. We build a statistical model of CSD realization, using pause length as a quantitative proxy for boundary strength, and find support for these predictions. These findings are compatible with the hypothesis that the locality of production planning constrains variability in speech production, and have practical implications for work on CSD and other variable processes.

  14. Production planning of a perishable product with lead time and non-stationary demand

    NARCIS (Netherlands)

    Pauls-Worm, K.G.J.; Haijema, R.; Hendrix, E.M.T.; Rossi, R.; Vorst, van der J.G.A.J.

    2012-01-01

    We study a production planning problem for a perishable product with a fixed lifetime, under a service-level constraint. The product has a non-stationary stochastic demand. Food supply chains of fresh products like cheese and several crop products, are characterised by long lead times due to

  15. Advanced inflow forecasting for a hydropower plant in an Alpine hydropower regulated catchment - coupling of operational and hydrological forecasts

    Science.gov (United States)

    Tilg, Anna-Maria; Schöber, Johannes; Huttenlau, Matthias; Messner, Jakob; Achleitner, Stefan

    2017-04-01

    Hydropower is a renewable energy source which can help to stabilize fluctuations in the volatile energy market. Especially pumped-storage infrastructures in the European Alps play an important role within the European energy grid system. Today, the runoff of rivers in the Alps is often influenced by cascades of hydropower infrastructures where the operational procedures are triggered by energy market demands, water deliveries and flood control aspects rather than by hydro-meteorological variables. An example for such a highly hydropower regulated river is the catchment of the river Inn in the Eastern European Alps, originating in the Engadin (Switzerland). A new hydropower plant is going to be built as transboundary project at the boarder of Switzerland and Austria using the water of the Inn River. For the operation, a runoff forecast to the plant is required. The challenge in this case is that a high proportion of runoff is turbine water from an upstream situated hydropower cascade. The newly developed physically based hydrological forecasting system is mainly capable to cover natural hydrological runoff processes caused by storms and snow melt but can model only a small degree of human impact. These discontinuous parts of the runoff downstream of the pumped storage are described by means of an additional statistical model which has been developed. The main goal of the statistical model is to forecast the turbine water up to five days in advance. The lead time of the data driven model exceeds the lead time of the used energy production forecast. Additionally, the amount of turbine water is linked to the need of electricity production and the electricity price. It has been shown that especially the parameters day-ahead prognosis of the energy production and turbine inflow of the previous week are good predictors and are therefore used as input parameters for the model. As the data is restricted due to technical conditions, so-called Tobit models have been used to

  16. Manufactured Product Design and Planning. Curriculum Guide for Technology Education.

    Science.gov (United States)

    Joyner, Jerry E.

    This curriculum for a 1-semester or 1-year course in product design and planning contains information about the following topics: creativity, idea production techniques, problem solving, design fundamentals, design requirements, graphic communication, materials and processes, and safety. Course content is organized around the laboratory activities…

  17. Small hydropower station Duennern Olten, Switzerland; Kleinwasserkraftwerk Munzingerareal, Duennern Olten. Vorprojekt

    Energy Technology Data Exchange (ETDEWEB)

    Eichenberger, P.

    2007-07-15

    This illustrated technical report for the Swiss Federal Office of Energy (SFOE) describes work done on the preliminary project for a small hydropower project to be realised in Olten, Switzerland. The goal of this project is to build a new hydropower installation on the Duennern stream in which the approximately 10 metres difference in height is to be used to generate around 1.6 GWh of power annually using a 345 kW turbine. The present situation is described as far as the existing channelled stream, water quantities and concessions, land ownership etc. are concerned. Four variants for the realisation of the new hydropower installation are presented and discussed. The report recommends a single variant that should be further studied and lists details of the project, including plans and cost estimates.

  18. Polymorphic Uncertain Linear Programming for Generalized Production Planning Problems

    Directory of Open Access Journals (Sweden)

    Xinbo Zhang

    2014-01-01

    Full Text Available A polymorphic uncertain linear programming (PULP model is constructed to formulate a class of generalized production planning problems. In accordance with the practical environment, some factors such as the consumption of raw material, the limitation of resource and the demand of product are incorporated into the model as parameters of interval and fuzzy subsets, respectively. Based on the theory of fuzzy interval program and the modified possibility degree for the order of interval numbers, a deterministic equivalent formulation for this model is derived such that a robust solution for the uncertain optimization problem is obtained. Case study indicates that the constructed model and the proposed solution are useful to search for an optimal production plan for the polymorphic uncertain generalized production planning problems.

  19. Partial constraint satisfaction approaches for optimal operation of a hydropower system

    Science.gov (United States)

    Ferreira, Andre R.; Teegavarapu, Ramesh S. V.

    2012-09-01

    Optimal operation models for a hydropower system using partial constraint satisfaction (PCS) approaches are proposed and developed in this study. The models use mixed integer nonlinear programming (MINLP) formulations with binary variables. The models also integrate a turbine unit commitment formulation along with water quality constraints used for evaluation of reservoir downstream water quality impairment. New PCS-based models for hydropower optimization formulations are developed using binary and continuous evaluator functions to maximize the constraint satisfaction. The models are applied to a real-life hydropower reservoir system in Brazil. Genetic Algorithms (GAs) are used to solve the optimization formulations. Decision maker's preferences towards power production targets and water quality improvements are incorporated using partial satisfaction constraints to obtain compromise operating rules for a multi-objective reservoir operation problem dominated by conflicting goals of energy production, water quality and consumptive water uses.

  20. Joint Optimization Approach of Maintenance and Production Planning for a Multiple-Product Manufacturing System

    Directory of Open Access Journals (Sweden)

    Lahcen Mifdal

    2015-01-01

    Full Text Available This paper deals with the problem of maintenance and production planning for randomly failing multiple-product manufacturing system. The latter consists of one machine which produces several types of products in order to satisfy random demands corresponding to every type of product. At any given time, the machine can only produce one type of product and then switches to another one. The purpose of this study is to establish sequentially an economical production plan and an optimal maintenance strategy, taking into account the influence of the production rate on the system’s degradation. Analytical models are developed in order to find the production plan and the preventive maintenance strategy which minimizes sequentially the total production/inventory cost and then the total maintenance cost. Finally, a numerical example is presented to illustrate the usefulness of the proposed approach.

  1. To plan or not to plan: Does planning for production remove facilitation from associative priming?

    Science.gov (United States)

    Jongman, Suzanne R; Meyer, Antje S

    2017-10-15

    Theories of conversation propose that in order to have smooth transitions from one turn to the next, speakers already plan their response while listening to their interlocutor. Moreover, it has been argued that speakers align their linguistic representations (i.e. prime each other), thereby reducing the processing costs associated with concurrent listening and speaking. In two experiments, we assessed how identity and associative priming from spoken words onto picture naming were affected by a concurrent speech planning task. In a baseline (no name) condition, participants heard prime words that were identical, associatively related, or unrelated to target pictures presented two seconds after prime onset. Each prime was accompanied by a non-target picture and followed by its recorded name. The participant did not name the non-target picture. In the plan condition, the participants first named the non-target picture, instead of listening to the recording, and then the target. In Experiment 1, where the plan- and no-plan conditions were tested between participants, priming effects of equal strength were found in the plan and no-plan condition. In Experiment 2, where the two conditions were tested within participants, the identity priming effect was maintained, but the associative priming effect was only seen in the no-plan but not in the plan condition. In this experiment, participant had to decide at the onset of each trial whether or not to name the non-target picture, rendering the task more complex than in Experiment 1. These decision processes may have interfered with the processing of the primes. Thus, associative priming can take place during speech planning, but only if the cognitive load is not too high. Copyright © 2017 Elsevier B.V. All rights reserved.

  2. Report to the parliament. Pluri-annual planning of power production investments; Rapport au parlement. Programmation pluriannuelle des investissements de production electrique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-01-01

    The article 6 of the law from February 10, 2000, relative to the modernization and development of the electric utility, schedules a pluri-annual planning of the production investments (PPI) which represents a concrete translation of the energy policy in the domain of electricity. The PPI will allow to reach the energy policy goals using a balanced development of the national production means in terms of primary energy sources, techniques of production and geographical distribution of investments. This document is the first PPI report to the parliament. It is based on the scheme of energy collective services and on a provisional status made by the manager of the transportation network (RTE). In 2010, renewable energies should cover 21% of the French electricity needs. This ratio will be reached mainly thanks to the development of wind power (7000 to 14000 MW of installed power, which represents 20 to 35 TWh of additional production). Hydro-power should be increased of 8 TWh max, depending on the public policies implemented, and biomass will have a significant contribution too. On the other hand, actions of mastery of the electricity demand will have to be implemented. From 2008 onward, the decommissioning of several power plants will impose to find new solutions to satisfy the peak power needs. The covering of consumption peaks requires a correlation study of the power peaks at the European scale. Finally, the situation of non-interconnected areas and of areas with fragile supply has been carefully considered. The creation of new power production means must be envisaged in most of these areas. (J.S.)

  3. Product Chain Action Plan tomato production in Kenya and Tanzania

    NARCIS (Netherlands)

    Visser, de C.L.M.

    2007-01-01

    With the importance of the field vegetable sector for Africa in mind and the constraints attached to that sector, the AfriVeg project (“Development of commercial field vegetable production, distribution and marketing for the East African market”) was developed by Wageningen UR to contribute to

  4. World Small Hydropower Development Report 2013 - Southern Africa

    CSIR Research Space (South Africa)

    Jonker Klunne, W

    2013-01-01

    Full Text Available The Southern African region comprises five countries, of which Lesotho, Namibia, Swaziland and South Africa use small hydropower, with Namibia currently having a very limited use of this technology. Botswana does not possess any hydropower plants...

  5. Structuring front-end innovation activities throughout strategic product planning

    Directory of Open Access Journals (Sweden)

    Thaisa Rodrigues

    Full Text Available Abstract Strategic product planning (SPP for new product development (NPD in the front-end of innovation (FEI is a great challenge for managers and practitioners. This article analyzes the structuring process of FEI activities during SPP. A research was carried out with 78 industries from both food and furniture in Brazil. Our study revealed that FEI activities are structured in an intricate network with a high level of complexity and interdependence. The large amount of activities and the complexity in structuring them denote that companies are concerned to reduce uncertainties and risks intensifying the planning phase.

  6. Planning Horizon for Production Inventory Models with Production Rate Dependent on Demand and Inventory Level

    Directory of Open Access Journals (Sweden)

    Jennifer Lin

    2013-01-01

    Full Text Available This paper discusses why the selection of a finite planning horizon is preferable to an infinite one for a replenishment policy of production inventory models. In a production inventory model, the production rate is dependent on both the demand rate and the inventory level. When there is an exponentially decreasing demand, the application of an infinite planning horizon model is not suitable. The emphasis of this paper is threefold. First, while pointing out questionable results from a previous study, we propose a corrected infinite planning horizon inventory model for the first replenishment cycle. Second, while investigating the optimal solution for the minimization problem, we found that the infinite planning horizon should not be applied when dealing with an exponentially decreasing demand. Third, we developed a new production inventory model under a finite planning horizon for practitioners. Numerical examples are provided to support our findings.

  7. Harnessing Hydropower: The Earth's Natural Resource

    Energy Technology Data Exchange (ETDEWEB)

    None

    2011-04-01

    This document is a layman's overview of hydroelectric power. It includes information on: History of Hydropower; Nature’s Water Cycle; Hydropower Plants; Turbines and Generators; Transmission Systems; power dispatching centers; and Substations. It goes on to discuss The Power Grid, Hydropower in the 21st Century; Energy and the Environment; and how hydropower is useful for Meeting Peak Demands. It briefly addresses how Western Area Power Administration is Responding to Environmental Concerns.

  8. Hydropower developments in Canada: number, size and jurisdictional and ecological distribution

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Peter G.; Hanneman, Matt; Cheng, Ryan [Global Forest Watch Canada (Canada)

    2011-08-15

    For over 200 years, energy production and consumption, along with all human activities, have been contributing to global warming. This report is part of a project that examines 10 major energy sectors to provide information on Canada's energy options in the face of climate change; this present study gives information on hydropower reservoirs and associated dams in Canada. The mapping, jurisdictional and ecological distribution of reservoirs and dams across Canada is provided herein. Canada's hydropower installations are composed of 271 large hydropower facilities covering 58,015 km2 with a capacity of 71,857 MW, accounting for 44% of Canada's total technical hydroelectric capacity. Quebec, Ontario and British Columbia are the provinces with the most large hydropower dams; 19% of the watersheds are occupied in part by hydropower reservoirs and the taiga shield, boreal shield and montane cordillera ecozones contain most of the reservoir areas. The majority of future developments are expected to be built within 5km of intact forest landscapes.

  9. Multi-Objective Fuzzy Linear Programming In Agricultural Production Planning

    Directory of Open Access Journals (Sweden)

    H.M.I.U. Herath

    2015-08-01

    Full Text Available Abstract Modern agriculture is characterized by a series of conflicting optimization criteria that obstruct the decision-making process in the planning of agricultural production. Such criteria are usually net profit total cost total production etc. At the same time the decision making process in the agricultural production planning is often conducted with data that accidentally occur in nature or that are fuzzy not deterministic. Such data are the yields of various crops the prices of products and raw materials demand for the product the available quantities of production factors such as water labor etc. In this paper a fuzzy multi-criteria mathematical programming model is presented. This model is applied in a region of 10 districts in Sri Lanka where paddy is cultivated under irrigated and rain fed water in the two main seasons called Yala and Maha and the optimal production plan is achieved. This study was undertaken to find out the optimal allocation of land for paddy to get a better yield while satisfying the two conflicting objectives profit maximizing and cost minimizing subjected to the utilizing of water constraint and the demand constraint. Only the availability of land constraint is considered as a crisp in nature while objectives and other constraints are treated as fuzzy. It is observed that the MOFLP is an effective method to handle more than a single objective occurs in an uncertain vague environment.

  10. Identifying and Evaluating Options for Improving Sediment Management and Fish Passage at Hydropower Dams in the Lower Mekong River Basin

    Science.gov (United States)

    Wild, T. B.; Reed, P. M.; Loucks, D. P.

    2015-12-01

    The Mekong River basin in Southeast Asia is undergoing intensive and pervasive hydropower development to satisfy demand for increased energy and income to support its growing population of 60 million people. Just 20 years ago this river flowed freely. Today some 30 large dams exist in the basin, and over 100 more are being planned for construction. These dams will alter the river's natural water, sediment and nutrient flows, thereby impacting river morphology and ecosystems, and will fragment fish migration pathways. In doing so, they will degrade one of the world's most valuable and productive freshwater fish habitats. For those dams that have not yet been constructed, there still exist opportunities to modify their siting, design and operation (SDO) to potentially achieve a more balanced set of tradeoffs among hydropower production, sediment/nutrient passage and fish passage. We introduce examples of such alternative SDO opportunities for Sambor Dam in Cambodia, planned to be constructed on the main stem of the Mekong River. To evaluate the performance of such alternatives, we developed a Python-based simulation tool called PySedSim. PySedSim is a daily time step mass balance model that identifies the relative tradeoffs among hydropower production, and flow and sediment regime alteration, associated with reservoir sediment management techniques such as flushing, sluicing, bypassing, density current venting and dredging. To date, there has been a very limited acknowledgement or evaluation of the significant uncertainties that impact the evaluation of SDO alternatives. This research is formalizing a model diagnostic assessment of the key assumptions and parametric uncertainties that strongly influence PySedSim SDO evaluations. Using stochastic hydrology and sediment load data, our diagnostic assessment evaluates and compares several Sambor Dam alternatives using several performance measures related to energy production, sediment trapping and regime alteration, and

  11. The Small-Scale Hydropower Plants in Sites of Environmental Value: An Italian Case Study

    Directory of Open Access Journals (Sweden)

    Marianna Rotilio

    2017-11-01

    Full Text Available Since ancient times water has been accompanying technological change in the energy sector. Used as a source of hydraulic energy, it currently generates one-fifth of the global electricity production. However, according to collective imagination, hydroelectric plants are constructions of high environmental, acoustic, and visual impact, which may harm the preservation of the territory. This paper intends to address the topic of mini-hydropower that, in addition to providing the production of renewable energy, ensures a limited environmental impact even in delicate contexts with high landscape values, by elaborating a research methodology that makes these interventions compatible with them. The process of “global compatibility” checks developed to assess the feasibility of the intervention will be explained in the paper. We intend to describe here the research process undertaken to make the planning of this type of system sustainable, in contexts that need to be rehabilitated in relation both to the accessibility of citizens and to the environmental enhancement. The intervention planned will be characterized by the combined use of other renewable energy sources, in addition to water. The proposed methodology has been tested on a case study in the village of Roccacasale, in the province of L’Aquila.

  12. A Framework for Incorporating Hydroclimate Variability in Regulated Rivers: Implications for Hydropower Relicensing in California's Yuba River

    Science.gov (United States)

    Akhbari, M.; Null, S. E.; Viers, J. H.; Rheinheimer, D. E.; Emmons, J. D.

    2012-12-01

    To develop appropriate, multi-decadal water resources management plans that incorporate competing interests, including recreation and ecosystem protection, climate warming should be considered in the analyses. This approach will improve understanding of local sensitivity to climate change, quantify the effects of hydropower operations on other water uses on a meaningful timeframe, and aid decision-making. In California, warmer air temperatures are expected to decrease mean annual flow, shift precipitation from snow to rainfall, alter runoff timing, warm stream temperatures, and reduce habitat for coldwater species. Rising air temperatures may also reduce whitewater recreation opportunities by altering the number of boatable weeks. In this study, a modeling framework is proposed to analyze the impact of climate warming on streamflow and water temperature due to hydropower operations. This framework is applied to California's Yuba River to estimate specific water resources impacts from hydropower operations. We use a multi-model approach with weekly time step. Hydropower operations are simplified and streamflow is estimated using WEAP21, a spatially-explicit rainfall-runoff model. These data are then passed to RTEMP, an equilibrium temperature model, to estimate stream temperatures. Using anticipated hydroclimatic changes based on Global Climate Models outputs and existing hydropower operations, streamflow timing and volume, stream temperatures, and recreational opportunities are analyzed. The results can help inform hydropower relicensing efforts.

  13. Hydropower potential of the lower Vistula

    Directory of Open Access Journals (Sweden)

    Michał Szydłowski

    2015-03-01

    Full Text Available This paper presents an estimate analysis of the hydropower potential of the lower Vistula River from Warsaw to Gdańsk Bay. The calculations were made for a hydraulic model of the lower Vistula which takes into account potential development of barrages in a cascade system. Results obtained from the model simulations and from hydrological calculations were used to estimate the power of hydropower plants and the average annual energy output from the entire cascade system. The results of calculations indicate significant energy benefits resulting from the development of a cascade of hydropower plants in the lower Vistula. This study does not discuss the cascade project’s economic viability or other aspects of its development (inland waterways, flood control, etc..

  14. Clean energy and water conflicts: Contested narratives of small hydropower in Mexico’s Sierra Madre Oriental

    Directory of Open Access Journals (Sweden)

    Noah Silber-Coats

    2017-06-01

    Full Text Available Small hydropower is poised to undergo a global boom, potentially accounting for as much as 75% of new hydroelectric installations over the next two decades. There are extensive bodies of literature arguing both that small hydropower is an environmentally benign technology benefitting rural communities, and, conversely, that unchecked small hydro development is a potential environmental calamity with dire consequences for rivers and those who depend upon them. Despite this debate, few studies have considered the ways in which small hydropower is socially constructed in the sites targeted for its development. This paper focuses on the Bobos-Nautla River Basin, in the Sierra Madre Oriental of Mexico, where numerous small hydropower projects are planned. The central argument is that the dominant framing of small hydropower in Mexico focuses on claimed benefits of 'clean' energy, sidelining any consideration of impacts on water resources and local environments. However, even if this narrative has dominated policy-making, it is being actively contested by a social movement that constructs these projects as water theft. The narratives surrounding small hydropower are reconstructed from interviews with government officials, activists, NGO workers and residents of communities near project sites conducted during ten weeks of fieldwork in 2014. The results of this fieldwork are contextualised by an overview of evolving trends in hydropower governance globally that situates the boom in small hydro within shifting relationships between states, international financial institutions, and private finance, as well as an historical account of the evolution of hydropower governance in Mexico that speaks to long-standing conflicts over water use for hydroelectric generation.

  15. Production planning and control of less emitting production systems

    Energy Technology Data Exchange (ETDEWEB)

    Haasis, H.D. [Bremen Univ. (Germany)

    1995-12-31

    The concept of integral environmental protection has been growing in importance within Western Europe in recent years. Increasingly, it has come to be recognized that no one part of the environment is separate from any other, it functions as a whole. Yet, pollution control was until recently, usually based on an approach which considers emissions to air, water, and land separately. That has begun to change, particularly since the 1987 report by the World Commission on Environment and Development. This can be recognized, for example, within the proposal for a Directive of the Council of the European Union on Integrated Pollution Prevention and Control. By this, the environmental media are placed on an equal legislative footing so that the final result will be that the way in which an installation is operated will be better for the whole environment. In other words, less emission production systems are obtained. Realization of an integral concept or of less emission production systems initially requires technical measures for the avoidance and the minimization of emissions, as well as recovery and recycling of materials and substances

  16. Marketing a managed care plan: achieving product differentiation.

    Science.gov (United States)

    Romeo, N C

    1996-01-01

    The health care marketplace is changing dramatically, even without federal reform measures. This is a volatile, yet promising, time to market a managed care plan. Before marketing the product, it is critical that the competition is thoroughly evaluated and consumer and employer needs are researched. The final product should be distinguishable from the competition and address market needs. Promotion can then begin, utilizing a proactive public relations and advertising campaign in addition to traditional methods of marketing.

  17. Raw material requirements planning in fruit juice production

    OpenAIRE

    Milić Dušan; Lukač-Bulatović Mirjana; Kalanović-Bulatović Branka; Milovančević Zoran

    2016-01-01

    The primary purpose of this research is to determine the production capacity requirements of a model fruit juice producer. In addition to fruit processing capacities, the company is in possession of its own land devoted to orchards. The research was conducted on the basis of a balance method, which has been used in fruit production for the planning of processing capacity requirements, i.e. the striking of a harmonious balance between the land capacity utilization via orchards and the industry...

  18. Hydropower flexibility and transmission expansion to support integration of offshore wind

    DEFF Research Database (Denmark)

    Cutululis, Nicolaos Antonio; Farahmand, Hossein; Jaehnert, S.

    2016-01-01

    systems are a very good option for balancing the natural variability of wind power production, especially when installed offshore. The flexibility of hydropower systems allows power systems with a high share of RES to maintain stability. The analysis presented indicates that the value of hydropower......In 2013, offshore wind grew over 50%. This increase, concentrated in a relatively small geographical area, can lead to an increased variability of the power produced by offshore wind. The variability is one of the key issues, along transmission, in integrating offshore wind power. Hydro power...... of hydro generation can match the variability of offshore wind, allowing for larger shares of variable generation to be integrated in the power systems without decreasing its stability. The analysis includes two interrelated models, a market model and a flow-based model. The results show that hydropower...

  19. White Rose development plan amendment production volume increase

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-09-15

    In January 2001, Husky Oil Operations Limited (Husky), in joint-venture with Petro-Canada, submitted a Benefits Plan for the White Rose Development to the Canada- Newfoundland and Labrador Offshore Petroleum Board (C-NLOPB). This revised document provided the case for requesting an increase in the facility maximum daily production rate and the average annual production rate for the White Rose field from 100,000 barrels per day (bpd) as stated in the approved White Rose Development Plan to 140,000 bpd. In order to determine the potential for increasing oil production through the Floating Production, Storage and Offloading (FPSO) vessel, two things were considered, namely the proper reservoir management of the White Rose field to ensure optimum resource recovery, and the capacity of the FPSO topsides processing system and supporting utilities to accommodate increased production. This document presented a detailed review of all the implications of increased production on the South White Rose Reservoir. In addition, the results from FPSO performance testing were reviewed, including a study of options for de-bottlenecking the process plant on the topsides and capacity testing of selected process streams and support systems. Vibration analysis was conducted before and during performance testing in July 2006 and a small number of areas addressed. The document also addressed flow metering, resource management, certifying authority review, safety plan revisions, environmental effects, as well as benefits to Canada and Newfoundland. 21 tabs., 60 refs.

  20. Hierarchical Production Planning and multi-echelon inventory management

    NARCIS (Netherlands)

    Zijm, Willem H.M.

    1992-01-01

    In this paper we present a framework for the planning and control of the materials flow in a multi-item production system. Our prime objective is to meet a prespecified customer service level at minimum overall costs. In order to motivate our study we first outline the basic architecture of a

  1. Production planning and control in SMEs : time for change

    NARCIS (Netherlands)

    Land, M.J.; Gaalman, G.J.C.

    2009-01-01

    This study aims to provide a profound picture of where existing production planning and control (PPC) concepts fail in small to medium sized make-to-order (MTO) companies. While several studies have discussed the specific requirements of small and medium sized enterprises (SMEs) through surveys or

  2. A model for marketing planning of new products

    DEFF Research Database (Denmark)

    Martensen, Anne

    1994-01-01

    the product after some time. 6. The model requires three types of data input: market data, market research data, and marketing plan data. Using these data, prediction can be made by a user-friendly PC programme. 7. An example is shown demonstrating that the predictions made by the model were in good...

  3. The sustainability of hydropower projects in Brazil

    Energy Technology Data Exchange (ETDEWEB)

    de Methodio Maranhao Neto, Gil; Yana, Laurent

    2010-09-15

    The construction of hydropower plants unquestionably impacts the environment and communities. But countries such as Brazil have been able to build up a sophisticated socio-environmental legislation and institutions as well as a democratic and participative licensing process to protect the nature and the population affected. In some cases, plants greatly contribute towards the creation of local welfare to the population as well as good environmental practices. As a good example of best practices on socio-environmental standards, we will analyze Jirau Hydropower Project, currently under construction on the Madeira River, north of Brazil.

  4. 76 FR 81929 - Small Hydropower Development in the United States; Notice of Small/Low-Impact Hydropower Webinar

    Science.gov (United States)

    2011-12-29

    ... Energy Regulatory Commission Small Hydropower Development in the United States; Notice of Small/Low-Impact Hydropower Webinar The Federal Energy Regulatory Commission will host a Small/Low- Impact... guidance on small/low- impact hydropower projects being developed in the Northeast region of the United...

  5. 75 FR 65012 - Small Hydropower Development in the United States; Notice of Small/Low-Impact Hydropower Webinar

    Science.gov (United States)

    2010-10-21

    .../Low- Impact Hydropower Webinar on November 10, 2010, from 12 noon to 1 p.m. Eastern Time. The webinar... introduce the new Small/Low- Impact Hydropower Program website and walk participants through all phases of... Energy Regulatory Commission Small Hydropower Development in the United States; Notice of Small/Low...

  6. To plan or not to plan: Does planning for production remove facilitation from associative priming?

    NARCIS (Netherlands)

    Jongman, S.R.; Meyer, A.S.

    2017-01-01

    Theories of conversation propose that in order to have smooth transitions from one turn to the next, speakers already plan their response while listening to their interlocutor. Moreover, it has been argued that speakers align their linguistic representations (i.e. prime each other), thereby reducing

  7. Refinery production planning and scheduling: the refining core business

    Directory of Open Access Journals (Sweden)

    M. Joly

    2012-06-01

    Full Text Available Intelligent production planning and scheduling are of paramount importance to ensure refinery profitability, logistic reliability and safety at the local and corporate levels. In Brazil, such activities play a particularly critical role, since the Brazilian downstream model is moving towards a demand-driven model rather than a supply-driven one. Moreover, new and specialized non-linear constraints are continuously being incorporated into these large-scale problems: increases in oil prices implying the need for processing poor quality crudes, increasing demand and new demand patterns for petroleum products, new stringent environmental regulations related to clean fuels and start-up of new production technologies embedded into more complex refining schemes. This paper aims at clarifying the central role of refinery planning and scheduling activities in the Petrobras refining business. Major past and present results are outlined and corporate long-term strategies to deal with present and future challenges are presented.

  8. Enhanced Simulated Annealing for Solving Aggregate Production Planning

    Directory of Open Access Journals (Sweden)

    Mohd Rizam Abu Bakar

    2016-01-01

    Full Text Available Simulated annealing (SA has been an effective means that can address difficulties related to optimisation problems. SA is now a common discipline for research with several productive applications such as production planning. Due to the fact that aggregate production planning (APP is one of the most considerable problems in production planning, in this paper, we present multiobjective linear programming model for APP and optimised by SA. During the course of optimising for the APP problem, it uncovered that the capability of SA was inadequate and its performance was substandard, particularly for a sizable controlled APP problem with many decision variables and plenty of constraints. Since this algorithm works sequentially then the current state will generate only one in next state that will make the search slower and the drawback is that the search may fall in local minimum which represents the best solution in only part of the solution space. In order to enhance its performance and alleviate the deficiencies in the problem solving, a modified SA (MSA is proposed. We attempt to augment the search space by starting with N+1 solutions, instead of one solution. To analyse and investigate the operations of the MSA with the standard SA and harmony search (HS, the real performance of an industrial company and simulation are made for evaluation. The results show that, compared to SA and HS, MSA offers better quality solutions with regard to convergence and accuracy.

  9. Inventory planning for feed metal production and excess materials disposition.

    Energy Technology Data Exchange (ETDEWEB)

    Hench, K. W. (Karen W.); Owens, S. D. (Sammi D.); Yarbro, T. F. (Tresa F.); Sena, D. J. (Diana J.); Mills, C. J. (Cindy J.)

    2001-01-01

    Inventory planning and scheduling at the Los Alamos National Laboratory nuclear facility (TA-55) has become increasingly demanding given the limited supply of nuclear materials available for weapons production. This limitation comes from the shutdown of nuclear production reactors as well as the declaration of materials excess to national security within the DOE complex. The materials that have been declared excess to national security cannot be used in support of nuclear weapons activities and must be appropriately dispositioned. The matrices of the excess materials and the materials in the weapons; stream are often similar, if not identical, and must be processed and/or packaged utilizing the same personnel and facility resources. In order to segregate these materials and continue weapons production and dispositioning operations concurrently, careful tracking at the item level is required. Scheduling and campaigning of these materials must also be carefully monitored in order to meet both nuclear weapons production schedules as well as dispositioning milestones. All planning activities must consider the impact of processing operations on severely constrained resources including the special nuclear materials storage vault, the nondestructive assay laboratory, and the waste management and shipping operations. This paper details the methodologies and the use of simulation and other computerized tools by the Nuclear Materials Technology Division materials management organization at TA-55. These tools assist in predicting materials and resource availability and optimizing the inventory planning activities.

  10. Operation of hydropower generation systems in the Alps under future climate and socio-economic drivers

    Science.gov (United States)

    Anghileri, Daniela; Castelletti, Andrea; Burlando, Paolo

    2015-04-01

    Alpine hydropower systems are an important source of renewable energy for many countries in Europe. In Switzerland, for instance, they represent the most important domestic source of renewable energy (around 55%). However, future hydropower production may be threatened by unprecedented challenges, such as a decreasing water availability, due to climate change (CC) and associated glacier retreat, and uncertain operating conditions, such as future power needs and highly fluctuating demand on the energy market. This second aspect has gained increasingly relevance since the massive introduction of solar and wind generating systems in the portfolios of many European countries. Because hydropower systems have the potential to provide backup storage of energy to compensate for fluctuations that are typical, for instance, of solar and wind generation systems, it is important to investigate how the increased demand for flexible operation, together with climate change challenge and fluctuating markets, can impact their operating policies. The Swiss Competence Center on Supply of Electricity (www.sccer-soe.ch) has been recently established to explore new potential paths for the development of future power generation systems. In this context, we develop modelling and optimization tools to design and assess new operation strategies for hydropower systems to increase their reliability, flexibility, and robustness to future operation conditions. In particular, we develop an advanced modelling framework for the integrated simulation of the operation of hydropower plants, which accounts for CC-altered streamflow regimes, new demand and market conditions, as well as new boundary conditions for operation (e.g., aquatic ecosystem conservation). The model construction consists of two primary components: a physically based and spatially distributed hydrological model, which describes the relevant hydrological processes at the basin scale, and an agent based decision model, which

  11. Alpine hydropower in a low carbon economy: Assessing the local implication of global policies

    Science.gov (United States)

    Anghileri, Daniela; Castelletti, Andrea; Burlando, Paolo

    2016-04-01

    In the global transition towards a more efficient and low-carbon economy, renewable energy plays a major role in displacing fossil fuels, meeting global energy demand while reducing carbon dioxide emissions. In Europe, Variable Renewable Sources (VRS), such as wind and solar power sources, are becoming a relevant share of the generation portfolios in many countries. Beside the indisputable social and environmental advantages of VRS, on the short medium term the VRS-induced lowering energy prices and increasing price's volatility might challenge traditional power sources and, among them, hydropower production, because of smaller incomes and higher maintenance costs associated to a more flexible operation of power systems. In this study, we focus on the Swiss hydropower sector analysing how different low-carbon targets and strategies established at the Swiss and European level might affect energy price formation and thus impact - through hydropower operation - water availability and ecosystems services at the catchment scale. We combine a hydrological model to simulate future water availability and an electricity market model to simulate future evolution of energy prices based on official Swiss and European energy roadmaps and CO2 price trends in the European Union. We use Multi-Objective optimization techniques to design alternative hydropower reservoir operation strategies, aiming to maximise the hydropower companies' income or to provide reliable energy supply with respect to the energy demand. This integrated model allows analysing to which extent global low-carbon policies impact reservoir operation at the local scale, and to gain insight on how to prioritise compensation measures and/or adaptation strategies to mitigate the impact of VRS on hydropower companies in increasingly water constrained settings. Numerical results are shown for a real-world case study in the Swiss Alps.

  12. Estimation of green house gas emissions from Koteshwar hydropower reservoir, India.

    Science.gov (United States)

    Kumar, Amit; Sharma, M P

    2017-05-01

    The emissions of greenhouse gas (GHG) from soils are of significant importance for global warming. The biological and physico-chemical characteristics of soil affect the GHG emissions from soils of different land use types. Methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) production rates from six forest and agricultural soil types in the Koteshwar hydropower reservoir catchments located in the Uttarakhand, India, were estimated and their relations with physico-chemical characteristics of soils were examined. The samples of different land use types were flooded and incubated under anaerobic condition at 30 °C for 60 days. The cumulative GHG production rates in reservoir catchment are found as 1.52 ± 0.26, 0.13 ± 0.02, and 0.0004 ± 0.0001 μg g soil-1 day-1 for CO2, CH4, and N2O, respectively, which is lower than global reservoirs located in the same eco-region. The significant positive correlation between CO2 productions and labile organic carbon (LOC), CH4 and C/N ratio, while N2O and N/P ratio, while pH of soils is negatively correlated, conforms their key role in GHG emissions. Carbon available as LOC in the reservoir catchment is found as 3-14% of the total ‟C" available in soils and 0-23% is retained in the soil after the completion of incubation. The key objective of this study to signify the C, N, and P ratios, LOC, and pH with GHG production rate by creating an incubation experiment (as in the case of benthic soil/sediment) in the lab for 60 days. In summary, the results suggest that carbon, as LOC were more sensitive indicators for CO2 emissions and significant C, N, and P ratios, affects the GHG emissions. This study is useful for the hydropower industry to know the GHG production rates after the construction of reservoir so that its effect could be minimized by taking care of catchment area treatment plan.

  13. Along-the-net reconstruction of hydropower potential with consideration of anthropic alterations

    Directory of Open Access Journals (Sweden)

    A. Masoero

    2014-09-01

    Full Text Available Even in regions with mature hydropower development, requirements for stable renewable power sources suggest revision of plans of exploitation of water resources, while taking care of the environmental regulations. Mean Annual Flow (MAF is a key parameter when trying to represent water availability for hydropower purposes. MAF is usually determined in ungauged basins by means of regional statistical analysis. For this study a regional estimation method consistent along-the-river network has been developed for MAF estimation; the method uses a multi-regressive approach based on geomorphoclimatic descriptors, and it is applied on 100 gauged basins located in NW Italy. The method has been designed to keep the estimates of mean annual flow congruent at the confluences, by considering only raster-summable explanatory variables. Also, the influence of human alterations in the regional analysis of MAF has been studied: impact due to the presence of existing hydropower plants has been taken into account, restoring the "natural" value of runoff through analytical corrections. To exemplify the representation of the assessment of residual hydropower potential, the model has been applied extensively to two specific mountain watersheds by mapping the estimated mean flow for the basins draining into each pixel of a the DEM-derived river network. Spatial algorithms were developed using the OpenSource Software GRASS GIS and PostgreSQL/PostGIS. Spatial representation of the hydropower potential was obtained using different mean flow vs hydraulic-head relations for each pixel. Final potential indices have been represented and mapped through the Google Earth platform, providing a complete and interactive picture of the available potential, useful for planning and regulation purposes.

  14. Methods and Algorithms for Economic MPC in Power Production Planning

    DEFF Research Database (Denmark)

    Sokoler, Leo Emil

    based on ADMM and Dantzig-Wolfe decomposition are proposed to solve these OCPs. Subproblems that arise in the decomposition algorithms are solved using structure-exploiting algorithms. To reduce computation time of the EMPC algorithms further, warm-start and early-termination strategies are employed...... is operational reserve planning. The operational reserves are activated to balance production and consumption in real-time. An EMPC scheme is presented for activation of operational reserves. Simulations based on a Faroe Islands case study show that signi_cant cost savings can be achieved using this strategy......-variance optimization strategy for EMPC of linear stochastic systems. - Tailored algorithms for solution of the OCPs that arise in EMPC of linear stochastic systems. - Methods for power production planning in small isolated power; the ORPP for unit commitment and economic dispatch, and an EMPC scheme for activation...

  15. AVLIS Production Plant Preliminary Quality Assurance Plan and Assessment

    Energy Technology Data Exchange (ETDEWEB)

    1984-11-15

    This preliminary Quality Assurance Plan and Assessment establishes the Quality Assurance requirements for the AVLIS Production Plant Project. The Quality Assurance Plan defines the management approach, organization, interfaces, and controls that will be used in order to provide adequate confidence that the AVLIS Production Plant design, procurement, construction, fabrication, installation, start-up, and operation are accomplished within established goals and objectives. The Quality Assurance Program defined in this document includes a system for assessing those elements of the project whose failure would have a significant impact on safety, environment, schedule, cost, or overall plant objectives. As elements of the project are assessed, classifications are provided to establish and assure that special actions are defined which will eliminate or reduce the probability of occurrence or control the consequences of failure. 8 figures, 18 tables.

  16. Production Planning with Respect to Uncertainties. Simulator Based Production Planning of Average Sized Combined Heat and Power Production Plants; Produktionsplanering under osaekerhet. Simulatorbaserad produktionsplanering av medelstora kraftvaermeanlaeggningar

    Energy Technology Data Exchange (ETDEWEB)

    Haeggstaahl, Daniel [Maelardalen Univ., Vaesteraas (Sweden); Dotzauer, Erik [AB Fortum, Stockholm (Sweden)

    2004-12-01

    Production planning in Combined Heat and Power (CHP) systems is considered. The focus is on development and use of mathematical models and methods. Different aspects on production planning are discussed, including weather and load predictions. Questions relevant on the different planning horizons are illuminated. The main purpose with short-term (one week) planning is to decide when to start and stop the production units, and to decide how to use the heat storage. The main conclusion from the outline of pros and cons of commercial planning software are that several are using Mixed Integer Programming (MIP). In that sense they are similar. Building a production planning model means that the planning problem is formulated as a mathematical optimization problem. The accuracy of the input data determines the practical detail level of the model. Two alternatives to the methods used in today's commercial programs are proposed: stochastic optimization and simulator-based optimization. The basic concepts of mathematical optimization are outlined. A simulator-based model for short-term planning is developed. The purpose is to minimize the production costs, depending on the heat demand in the district heating system, prices of electricity and fuels, emission taxes and fees, etc. The problem is simplified by not including any time-linking conditions. The process model is developed in IPSEpro, a heat and mass-balance software from SimTech Simulation Technology. TOMLAB, an optimization toolbox in MATLAB, is used as optimizer. Three different solvers are applied: glcFast, glcCluster and SNOPT. The link between TOMLAB and IPSEpro is accomplished using the Microsoft COM technology. MATLAB is the automation client and contains the control of IPSEpro and TOMLAB. The simulator-based model is applied to the CHP plant in Eskilstuna. Two days are chosen and analyzed. The optimized production is compared to the measured. A sensitivity analysis on how variations in outdoor

  17. Demonstrating a new framework for the comparison of environmental impacts from small- and large-scale hydropower and wind power projects.

    Science.gov (United States)

    Bakken, Tor Haakon; Aase, Anne Guri; Hagen, Dagmar; Sundt, Håkon; Barton, David N; Lujala, Päivi

    2014-07-01

    Climate change and the needed reductions in the use of fossil fuels call for the development of renewable energy sources. However, renewable energy production, such as hydropower (both small- and large-scale) and wind power have adverse impacts on the local environment by causing reductions in biodiversity and loss of habitats and species. This paper compares the environmental impacts of many small-scale hydropower plants with a few large-scale hydropower projects and one wind power farm, based on the same set of environmental parameters; land occupation, reduction in wilderness areas (INON), visibility and impacts on red-listed species. Our basis for comparison was similar energy volumes produced, without considering the quality of the energy services provided. The results show that small-scale hydropower performs less favourably in all parameters except land occupation. The land occupation of large hydropower and wind power is in the range of 45-50 m(2)/MWh, which is more than two times larger than the small-scale hydropower, where the large land occupation for large hydropower is explained by the extent of the reservoirs. On all the three other parameters small-scale hydropower performs more than two times worse than both large hydropower and wind power. Wind power compares similarly to large-scale hydropower regarding land occupation, much better on the reduction in INON areas, and in the same range regarding red-listed species. Our results demonstrate that the selected four parameters provide a basis for further development of a fair and consistent comparison of impacts between the analysed renewable technologies. Copyright © 2014 The Authors. Published by Elsevier Ltd.. All rights reserved.

  18. Improving productivity and firm performance with enterprise resource planning

    Science.gov (United States)

    Beheshti, Hooshang M.; Beheshti, Cyrus M.

    2010-11-01

    Productivity is generally considered to be the efficient utilisation of organisational resources and is measured in terms of the efficiency of a worker, company or nation. Focusing on efficiency alone, however, can be harmful to the organisation's long-term success and competitiveness. The full benefits of productivity improvement measures are realised when productivity is examined from two perspectives: operational efficiency (output/input) of an individual worker or a business unit as well as performance (effectiveness) with regard to end user or customer satisfaction. Over the years, corporations have adopted new technology to integrate business activities in order to achieve both effectiveness and efficiency in their operations. In recent years, many firms have invested in enterprise resource planning (ERP) in order to integrate all business activities into a uniform system. The implementation of ERP enables the firm to reduce the transaction costs of the business and improve its productivity, customer satisfaction and profitability.

  19. 7 CFR 205.201 - Organic production and handling system plan.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Organic production and handling system plan. 205.201... Requirements § 205.201 Organic production and handling system plan. (a) The producer or handler of a production... ingredients or food group(s))” must develop an organic production or handling system plan that is agreed to by...

  20. Exploring the hydropower potential of future ice-free glacier basins

    Science.gov (United States)

    Round, Vanessa; Farinotti, Daniel; Huss, Matthias

    2017-04-01

    The retreat of glaciers over the next century will present new challenges related to water availability and cause significant changes to the landscape. The construction of dams in areas becoming ice-free has previously been suggested as a mitigation measure against changes to water resources in the European Alps. In Switzerland, a number of hydropower dams already exist directly below glaciers, and the hydropower potential of natural lakes left by retreating glaciers has been recognised. We expand these concepts to the regional, and ultimately global, scale to assess the potential of creating hydropower dams in glacier basins, encouraged by advantages such as relatively low ecological and social impacts, and the possibility to replicate the water storage capabilities of glaciers. In a first order assessment, dam volumes are computed using a subglacial topography model and dam walls simulated at the terminus of each glacier. Potential power production is then estimated from projected glacier catchment runoff until 2100 based on the Global Glacier Evolution Model (GloGEM), and penstock head approximated from a global digital elevation model. Based on this, a feasibility ranking system is presented which takes into account various proxies for cost, demand and impact, such as proximity to populations and existing infrastructure, geological risks and threatened species. The ultimate objective is to identify locations of glacier retreat which could most feasibly and beneficially be used for hydropower production.

  1. Climate impacts on hydropower and consequences for global electricity supply investment needs

    Energy Technology Data Exchange (ETDEWEB)

    Turner, Sean W. D.; Hejazi, Mohamad; Kim, Son H.; Clarke, Leon; Edmonds, Jae

    2017-12-01

    Recent progress in global scale hydrological and dam modeling has allowed for the study of climate change impacts on global hydropower production. Here we explore the possible consequences of these impacts for the electricity supply sector. Regional hydropower projections are developed for two emissions scenarios by forcing a coupled global hydrological and dam model with downscaled, bias-corrected climate realizations derived from sixteen general circulation models. Consequent impacts on power sector composition and associated emissions and investment costs are explored using the Global Change Assessment Model (GCAM). Changes in hydropower generation resulting from climate change can shift power demands onto and away from carbon intensive technologies, resulting in significant impacts on power sector CO2 emissions for certain world regions—primarily those located in Latin America, as well as Canada and parts of Europe. Reduced impacts of climate change on hydropower production under a low emissions scenario coincide with increased costs of marginal power generating capacity—meaning impacts on power sector investment costs are similar for high and low emissions scenarios. Individual countries where impacts on investment costs imply significant risks or opportunities are identified.

  2. An Integrated Model for Production and Distribution Planning of Perishable Products with Inventory and Routing Considerations

    Directory of Open Access Journals (Sweden)

    S. M. Seyedhosseini

    2014-01-01

    Full Text Available In many conventional supply chains, production planning and distribution planning are treated separately. However, it is now demonstrated that they are mutually related problems that must be tackled in an integrated way. Hence, in this paper a new integrated production and distribution planning model for perishable products is formulated. The proposed model considers a supply chain network consisting of a production facility and multiple distribution centers. The facility produces a single perishable product that is storable only for predetermined periods. A homogenous fleet of vehicles is responsible for delivering the product from facility to distribution centers. The decisions to be made are the production quantities, the distribution centers that must be visited, and the quantities to be delivered to them. The objective is to minimize the total cost, where the trip minimization is considered simultaneously. As the proposed formulation is computationally complex, a heuristic method is developed to tackle the problem. In the developed method, the problem is divided into production submodel and distribution submodel. The production submodel is solved using LINGO, and a particle swarm heuristic is developed to tackle distribution submodel. Efficiency of the algorithm is proved through a number of randomly generated test problems.

  3. Situational planning of production processes in a flexible automated production system

    Science.gov (United States)

    Solomentsev, Y. M.; Basin, A. M.; Klimov, S. V.

    1984-11-01

    The introduction of flexible automated production systems (GAPS) that reduce the number of machine tool workers and the product fabrication time also necessitates fundamentally new approaches to production process planning. A proposed situational planning system (SIP) that takes full advantage of the capabilities of GAPS is analyzed. The SIP system is a component of the automated control system for the GAPS, which in turn is subordinate to an integrated automated planning design and production engineering system. Depending on the production situation, requests are fed to the SIP system from the automated production process control system. Data on the production situation are also supplied simultaneously to the SIP system along with the request. Only the production limitations are fed into the SIP system, i.e., to the automated control system for the GAPS, where these limitations include production process limitations as well as the organizational limitations. Information on the fabrication routing and the composition of the operations is generated by the SIP system, i.e., by the automated control system for the GAPS itself in real time. Thus, both the routing and composition of an operation become flexible, while the control systems for the GAPS system becomes more intelligent.

  4. Efficient Operation of a Multi-purpose Reservoir in Chile: Integration of Economic Water Value for Irrigation and Hydropower

    Science.gov (United States)

    Olivares, M. A.; Gonzalez Cabrera, J. M., Sr.; Moreno, R.

    2016-12-01

    Operation of hydropower reservoirs in Chile is prescribed by an Independent Power System Operator. This study proposes a methodology that integrates power grid operations planning with basin-scale multi-use reservoir operations planning. The aim is to efficiently manage a multi-purpose reservoir, in which hydroelectric generation is competing with other water uses, most notably irrigation. Hydropower and irrigation are competing water uses due to a seasonality mismatch. Currently, the operation of multi-purpose reservoirs with substantial power capacity is prescribed as the result of a grid-wide cost-minimization model which takes irrigation requirements as constraints. We propose advancing in the economic co-optimization of reservoir water use for irrigation and hydropower at the basin level, by explicitly introducing the economic value of water for irrigation represented by a demand function for irrigation water. The proposed methodology uses the solution of a long-term grid-wide operations planning model, a stochastic dual dynamic program (SDDP), to obtain the marginal benefit function for water use in hydropower. This marginal benefit corresponds to the energy price in the power grid as a function of the water availability in the reservoir and the hydrologic scenarios. This function allows capture technical and economic aspects to the operation of hydropower reservoir in the power grid and is generated with the dual variable of the power-balance constraint, the optimal reservoir operation and the hydrologic scenarios used in SDDP. The economic value of water for irrigation and hydropower are then integrated into a basin scale stochastic dynamic program, from which stored water value functions are derived. These value functions are then used to re-optimize reservoir operations under several inflow scenarios.

  5. Optimal Control Approaches to the Aggregate Production Planning Problem

    Directory of Open Access Journals (Sweden)

    Yasser A. Davizón

    2015-12-01

    Full Text Available In the area of production planning and control, the aggregate production planning (APP problem represents a great challenge for decision makers in production-inventory systems. Tradeoff between inventory-capacity is known as the APP problem. To address it, static and dynamic models have been proposed, which in general have several shortcomings. It is the premise of this paper that the main drawback of these proposals is, that they do not take into account the dynamic nature of the APP. For this reason, we propose the use of an Optimal Control (OC formulation via the approach of energy-based and Hamiltonian-present value. The main contribution of this paper is the mathematical model which integrates a second order dynamical system coupled with a first order system, incorporating production rate, inventory level, and capacity as well with the associated cost by work force in the same formulation. Also, a novel result in relation with the Hamiltonian-present value in the OC formulation is that it reduces the inventory level compared with the pure energy based approach for APP. A set of simulations are provided which verifies the theoretical contribution of this work.

  6. 21st century Himalayan hydropower: Growing exposure to glacial lake outburst floods?

    Science.gov (United States)

    Schwanghart, Wolfgang; Worni, Raphael; Huggel, Christian; Stoffel, Markus; Korup, Oliver

    2014-05-01

    Primary energy demand in China and India has increased fivefold since 1980. To avoid power shortages and blackouts, the hydropower infrastructure in the Hindu Kush-Himalaya region is seeing massive development, a strategy supported by the policy of the World Bank and in harmony with the framework of the Kyoto Protocol. The targeted investments in clean energy from water resources, however, may trigger far-reaching impacts to downstream communities given that hydropower projects are planned and constructed in close vicinity to glaciated areas. We hypothesize that the location of these new schemes may be subject to higher exposure to a broad portfolio of natural hazards that proliferate in the steep, dissected, and tectonically active topography of the Himalayas. Here we focus on the hazard from glacial lake outburst floods (GLOF), and offer an unprecedented regional analysis for the Hindu Kush-Himalaya orogen. We compiled a database of nearly 4,000 proglacial lakes that we mapped from satellite imagery; and focus on those as potential GLOF sources that are situated above several dozen planned and existing hydropower plants. We implemented a scenario-based flood-wave propagation model of hypothetic GLOFs, and compared thus simulated peak discharges with those of the local design floods at the power plants. Multiple model runs confirm earlier notions that GLOF discharge may exceed meteorological, i.e. monsoon-fed, flood peaks by at least an order of magnitude throughout the Hindu Kush-Himalaya. We further show that the current trend in hydropower development near glaciated areas may lead to a >15% increase of projects that may be impacted by future GLOFs. At the same time, the majority of the projects are to be sited where outburst flood modelling produces its maximum uncertainty, highlighting the problem of locating minimum risk sites for hydropower. Exposure to GLOFs is not uniformly distributed in the Himalayas, and is particularly high in rivers draining the Mt

  7. Production roll out plan for HANDI 2000 business management system

    Energy Technology Data Exchange (ETDEWEB)

    Adams, D.E.

    1998-09-29

    The Hanford Data Integration 2000 (HANDI 2000) Project will result in an integrated and comprehensive set of functional applications containing core information necessary to support the Project Hanford Management Contract (PHMC). It is based on the Commercial-Off-The-Shelf (COTS) product solution with commercially proven business processes. The COTS product solution set, of Passport (PP) and PeopleSoft (PS) software, supports finance, supply, human resources, and payroll activities under the current PHMC direction. The PP software is an integrated application for Accounts Payable, Contract Management, Inventory Management, Purchasing and Material Safety Data Sheets (MSDS). The PS software is an integrated application for Projects, General Ledger, Human Resources Training, Payroll, and Base Benefits. This set of software constitutes the Business Management System (BMS) and MSDS, a subset of the HANDI 2000 suite of systems. The primary objective of the Production Roll Out Plan is to communicate the methods and schedules for implementation and roll out to end users of BMS.

  8. Hydropower resources at risk: The status of hydropower regulation and development - 1997

    Energy Technology Data Exchange (ETDEWEB)

    Hunt, R.T.; Hunt, J.A. [Richard Hunt Associates, Inc., Annapolis, MD (United States)

    1997-09-01

    This report documents today`s hydropower licensing and development status based on published data as follows: (a) Federal Energy Regulatory Commission (FERC) databases, maintained by FERC`s Office of Hydropower Licensing, of: (1) operating FERC-regulated projects, federal projects, and known unlicensed projects; (2) surrendered licenses; and, (3) recent licensing and relicensing actions; (b) Energy Information Administration (EIA) data on installed capacity and generation from 1949 through 1995 for the various resources used to produce electricity in the U.S.; and, (c) FERC licensing orders, and environmental assessments or environmental impact statements for each individual project relicensed since 1980. The analysis conducted to prepare this paper includes the effects of all FERC hydropower licensing actions since 1980, and applies those findings to estimate the costs of hydropower licensing and development activity for the next 15 years. It also quantifies the national cost of hydropower regulation. The future estimates are quite conservative. The are presented in 1996 dollars without speculating on the effects of future inflation, license surrenders, conditions imposed through open-ended license articles, license terms greater than 30 years, or low water years. Instead, they show the most directly predictable influences on licensing outcomes using actual experiences since ECPA (after 1986).

  9. Human Factors And Ergonomics In The Planning Of Production

    DEFF Research Database (Denmark)

    Jensen, Per Langå

    2002-01-01

    For year’s integration of ergonomics into the planning of new production processes has been an ideal for regulating agencies supported by ergonomic experts. But the ideal appears to be difficult to live up to. A development of tools both by agencies and by groups of researchers has been seen...... as the strategy to move ergonomics from repair activities towards integration into planning. But the tools are available. An overview of the tools developed and discussed in the last two decades in the Scandinavian countries is presented. It is, therefore, argued that the focus shall be on the broader issues...... of organizational conditions for giving ergonomics a stronger position in the firm. Ergonomists have to tackle these issues, but it implies a new understanding of their roles, which goes beyond the traditional discussion of expert versus facilitator. The paper is based on an evaluation of a Swedish research...

  10. A Graphical Interactive Simulation Environment for Production Planning in Bacon Factories

    DEFF Research Database (Denmark)

    Nielsen, Kirsten Mølgaard; Nielsen, Jens Frederik Dalsgaard

    1994-01-01

    The paper describes a graphical interactive simulation tool for production planning in bacon factories........The paper describes a graphical interactive simulation tool for production planning in bacon factories.....

  11. A production model and maintenance planning model for the process industry

    NARCIS (Netherlands)

    Ashayeri, J.; Teelen, A.; Selen, W.J.

    1995-01-01

    In this paper a model is developed to simultaneously plan preventive maintenance and production in a process industry environment, where maintenance planning is extremely important. The model schedules production jobs and preventive maintenance jobs, while minimizing costs associated with

  12. Hydropower in Turkey: potential and market assessment

    Energy Technology Data Exchange (ETDEWEB)

    2010-10-15

    The Turkish hydropower market provides huge opportunities for investors and suppliers. Successful market entry is not easy, however, as the market is still not fully liberalized, the need for local intelligence is large and the competition is increasing. There are also potential political, reputational and environmental risks, typical for an emerging economy. The World Bank global 'Ease of doing business' ranking (2010), ranks Turkey as number 73 of 183 countries. (Author)

  13. Hydropower Generation Vulnerability in the Yangtze River in China under Climate Change Scenarios: Analysis Based on the WEAP Model

    Directory of Open Access Journals (Sweden)

    Yue Zhang

    2017-11-01

    Full Text Available Global warming caused by human activities exacerbates the water cycle, changes precipitation features, such as precipitation amount, intensity and time, and raises uncertainties in water resources. This work uses run-off data obtained using climate change models under representative concentration pathways (RCPs and selects the Yangtze River Basin as the research boundary to evaluate and analyse the vulnerability of hydropower generation in 2016–2050 on the basis of the water evaluation and planning model. Results show that the amount of rainfall during 2016–2050 in the Yangtze River Basin is estimated to increase with fluctuations in RCP4.5 and RCP8.5 scenarios. In the RCP4.5 scenario, hydropower stations exhibit large fluctuations in generating capacity, which present the trend of an increase after a decrease; in the RCP8.5 scenario, the generating capacity of hydropower stations in the Yangtze River Basin presents a steady increase. Over 50% of the generating capacity in the Yangtze River Basin is produced from the Three Gorges Dam and 10 other hydropower stations. Over 90% is generated in eight river basins, including the Jinsha, Ya-lung and Min Rivers. Therefore, climate change may accelerate changes in the Yangtze River Basin and further lead to vulnerability of hydropower generation.

  14. Raw material requirements planning in fruit juice production

    Directory of Open Access Journals (Sweden)

    Milić Dušan

    2016-01-01

    Full Text Available The primary purpose of this research is to determine the production capacity requirements of a model fruit juice producer. In addition to fruit processing capacities, the company is in possession of its own land devoted to orchards. The research was conducted on the basis of a balance method, which has been used in fruit production for the planning of processing capacity requirements, i.e. the striking of a harmonious balance between the land capacity utilization via orchards and the industry of fruit processing. For the planned production of 33,280 tons of raw materials, at average yields, the producer should be in possession of an area of 2,344 ha. For the processing capacity of 160 tons of raw materials a day, the producer should be in possession of the following diversity and spatial distribution of cultivated fruit species: strawberries (516 ha, raspberries (332 ha, sour cherries (361 ha, apricots (71 ha, peaches (178 ha, blueberries (320 ha, plums (50 ha, pears (89 ha, apples (137 ha, quinces (50 ha, and grapes (240 ha.

  15. Exploring current and projected tradeoffs between hydropower profitability and reliability of supply in the Alps

    Science.gov (United States)

    Anghileri, D.; Castelletti, A.; Burlando, P.

    2015-12-01

    The recent spreading of renewable energy across Europe and the associated production variability and uncertainty are emerging challenges for hydropower system operation. Widely distributed and highly intermittent solar and wind power generation systems, along with feed-in-tariffs, at which they are remunerated, are threating the operation of traditional hydropower systems. For instance, in countries where the transition to a larger production by means of renewable power systems is a novel process, e.g. Switzerland, many hydropower companies are operating their reservoirs with low or no profits, claiming for a revision of the entire energy market system. This situation goes along with the problem of ensuring energy supply both nowadays and in the future, with changing energy demand and available water resources. In this work, we focus on a hydropower system in the Swiss Alps to explore how different operating policies can cope with both adequate energy supply and profitable operation under current and future climate and socio-economic conditions. We investigate the operation of the Mattmark reservoir in South-West Switzerland. Mattmark is a pumped reservoir of 98 106 m3 fed by a natural catchment of 37 km2 and contributing catchments, summing up to 51 km2, connected by several diversion channels. The hydrological regime, snow- and ice-melt dominated, has already experienced changes in the last decades due to glacier retreat and is expected to be strongly impacted by climate change in the future. We use Multi-Objective optimization techniques to explore current tradeoffs between profitability and secure supply. We then investigate how tradeoffs may evolve in time under different climate change projections and energy market scenarios. Results inform on the co-evolution of climate- and socio-economic induced variations, thus unveiling potential co-benefit situations to hydropower generation and providing insights to future energy market design.

  16. Knowledge Management Platform in Advanced Product Quality Planning

    Science.gov (United States)

    Chiliban, Bogdan; Baral, Lal Mohan; Kifor, Claudiu

    2014-12-01

    Knowledge is an essential part of organizational competitiveness. This vital resource must be managed correctly within organizations in order to achieve desired performance levels within all undertakings. The process of managing knowledge is a very difficult one due to the illusive nature of the resource itself. Knowledge is stored within every aspect of an organization starting from people and ending with documents and processes. The Knowledge Management Platform is designed as a facilitator for managers and employees in all endeavours knowledge related within the Advanced Product Quality Planning Procedure

  17. A Fuzzy Linear Programming Approach for Aggregate Production Planning

    DEFF Research Database (Denmark)

    Iris, Cagatay; Cevikcan, Emre

    2014-01-01

    and inventory costs, but also increase the level of service available to the customers. When maintaining APP, some of cost and demand parameters cannot be frequently determined as crisp values. Fuzzy logic is utilized in many engineering applications so as to handle imprecise data. This chapter provides...... a mathematical programming framework for aggregate production planning problem under imprecise data environment. After providing background information about APP problem, together with fuzzy linear programming, the fuzzy linear programming model of APP is solved on an illustrative example for different a...

  18. Multi-assortment rhythmic production planning and control

    Science.gov (United States)

    Skolud, B.; Krenczyk, D.; Zemczak, M.

    2015-11-01

    A method for production planning in a repetitive manufacturing system which allows for estimating the possibility of processing work orders in due time is presented. The difference between two approaches are presented; the first one one-piece flow elaborated in Toyota and the second one elaborated by authors that consists in defining sufficient conditions to filter all solutions and providing a set of admissible solutions for both the client and the producer. In the paper attention is focused on the buffer allocation. Illustrative examples are presented.

  19. Analytic network process (ANP approach for product mix planning in railway industry

    Directory of Open Access Journals (Sweden)

    Hadi Pazoki Toroudi

    2016-08-01

    Full Text Available Given the competitive environment in the global market in recent years, organizations need to plan for increased profitability and optimize their performance. Planning for an appropriate product mix plays essential role for the success of most production units. This paper applies analytical network process (ANP approach for product mix planning for a part supplier in Iran. The proposed method uses four criteria including cost of production, sales figures, supply of raw materials and quality of products. In addition, the study proposes different set of products as alternatives for production planning. The preliminary results have indicated that that the proposed study of this paper could increase productivity, significantly.

  20. 7 CFR 457.128 - Guaranteed production plan of fresh market tomato crop insurance provisions.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 6 2010-01-01 2010-01-01 false Guaranteed production plan of fresh market tomato crop... § 457.128 Guaranteed production plan of fresh market tomato crop insurance provisions. The Guaranteed Production Plan of Fresh Market Tomato Crop Insurance FCIC Policies Department of Agriculture Federal Crop...

  1. Serbian Hydropower Plants Selection Based on Elementary Turbine Parameters Using Multi- Criteria Decisions Making

    OpenAIRE

    Radjenovic, Zarko; Boskov, Tatjana; Pantic, Anđela

    2017-01-01

    The problem of electricity deficit and inadequate utilization of existing water facilities, as well as insufficient analysis of hydro potential of Serbia, has led to the emergence of increasing electricity imports. Specifically, policy makers of power industry should pay more attention to global trends in the production of electricity. There are primarily related to increase production by building small, local hydropower plant, which will meet the needs with its potential at a ...

  2. The Second Assessment of the Effects of Climate Change on Federal Hydropower

    Energy Technology Data Exchange (ETDEWEB)

    Kao, Shih-Chieh [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Ashfaq, Moetasim [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Naz, Bibi S. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Uria Martinez, Rocio [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Rastogi, Deeksha [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Mei, Rui [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Jager, Yetta [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Samu, Nicole M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Sale, Michael J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2016-09-01

    relatively large storage capacity in the most of the US federal hydropower reservoirs, the system is likely to be able to absorb part of the runoff variability and hence may continue to provide stable annual hydropower generation in the projected near-term and midterm future periods. Nevertheless, the findings are based on the assumption that there is no significant change in the future installed capacity and operation. The issues of aging infrastructures, competing water demand, and environmental requirements may reduce the system s ability to mitigate runoff variability and increase the difficulty of future operation. These issues are not quantitatively analyzed in this study. This study presents a regional assessment at each of the eighteen PMA study areas. This generalized approach allows for spatial consistency throughout all study areas, enabling policymakers to evaluate potential climate change impacts across the entire federal hydropower fleet. This effort is expected to promote better understanding of the sensitivity of federal power plants to water availability and provides a basis for planning future actions that will enable adaptation to climate variability and change.

  3. Implementation of Logic Flow in Planning and Production Control

    Directory of Open Access Journals (Sweden)

    Ulewicz Robert

    2016-03-01

    Full Text Available The article presents the results of analysis, the use of continuous flow of logic at the stage of production planning and control of the company producing furniture. The concept of continuous flow tends to regulate the flow of materials in a manner that provides the shortest flow path without unnecessary activities (Muda is a Japanese word meaning waste, a constant takt and defined throughput at constant resource requirements for the so-called transfer of material through the whole process. In the study Glenday’d sieve method was used to identify the correct area, which requires the value stream mapping, and areas called excessive complexity, which do not provide added value. The use of Glenday’s sieve method made it possible to identify areas in which it must be improve production capacity.

  4. Effects of the uncertainty of energy price and water availability forecasts on the operation of Alpine hydropower reservoir systems

    Science.gov (United States)

    Anghileri, D.; Castelletti, A.; Burlando, P.

    2016-12-01

    European energy markets have experienced dramatic changes in the last years because of the massive introduction of Variable Renewable Sources (VRSs), such as wind and solar power sources, in the generation portfolios in many countries. VRSs i) are intermittent, i.e., their production is highly variable and only partially predictable, ii) are characterized by no correlation between production and demand, iii) have negligible costs of production, and iv) have been largely subsidized. These features result in lower energy prices, but, at the same time, in increased price volatility, and in network stability issues, which pose a threat to traditional power sources because of smaller incomes and higher maintenance costs associated to a more flexible operation of power systems. Storage hydropower systems play an important role in compensating production peaks, both in term of excess and shortage of energy. Traditionally, most of the research effort in hydropower reservoir operation has focused on modeling and forecasting reservoir inflow as well as designing reservoir operation accordingly. Nowadays, price variability may be the largest source of uncertainty in the context of hydropower systems, especially when considering medium-to-large reservoirs, whose storage can easily buffer small inflow fluctuations. In this work, we compare the effects of uncertain inflow and energy price forecasts on hydropower production and profitability. By adding noise to historic inflow and price trajectories, we build a set of synthetic forecasts corresponding to different levels of predictability and assess their impact on reservoir operating policies and performances. The study is conducted on different hydropower systems, including storage systems and pumped-storage systems, with different characteristics, e.g., different inflow-capacity ratios. The analysis focuses on Alpine hydropower systems where the hydrological regime ranges from purely ice and snow-melt dominated to mixed snow

  5. Production Planning through Customized ERP at a Nordic Manufacturing Company

    Directory of Open Access Journals (Sweden)

    Amol Gore

    2011-09-01

    Full Text Available The enterprise resource planning (ERP solutions that gained acceptancein industries world over as they represent a proven, comprehensive,software backbone for achieving excellence in keybusiness areas, have moved forward today to higher levels of innovationand technologies. The management of procurement,manufacturing, product development, finance, sales and servicewith various erp modules together with complexities of operationsacross corporate boundaries and intense global competitionhave all resulted in a continuing erp discourse developed in relationto both theory and practice. This paper aims to contributean empirical study and explore the vital process of productionplanning in a customized erp environment. In doing so, it takes aqualitative methodology in the form of the case of a Nordic (NorthernEuropean log house manufacturing company. The favourableerp implementation in the company tends to justify the customizingof applications at early phase instead of adopting the standardERP package despite the wide scope of the standard packages.The research findings insinuate preference for customizederp over standard ERP package for enabling effective generationof production plans.

  6. Multiperiod planning tool for multisite pig production systems.

    Science.gov (United States)

    Nadal-Roig, E; Plà, L M

    2014-09-01

    This paper presents a multiperiod planning tool for multisite pig production systems based on Linear Programming (LP). The aim of the model is to help pig managers of multisite systems in making short-term decisions (mainly related to pig transfers between farms and batch management in fattening units) and mid-term or long-term decisions (according to company targets and expansion strategy). The model skeleton follows the structure of a three-site system that can be adapted to any multisite system present in the modern pig industry. There are three basic phases, namely, piglet production, rearing pigs, and fattening. Each phase involves a different set of farms; therefore, transportation between farms and delivering of pigs to the abattoir are under consideration. The model maximizes the total gross margin calculated from the income of sales to the abattoir and the production costs over the time horizon considered. Production cost depends on each type of farm involved in the process. Parameters like number of farms per phase and distance, farm capacity, reproduction management policies, feeding and veterinary expenses, and transportation costs are taken into account. The model also provides a schedule of transfers between farms in terms of animals to be transported and number of trucks involved. The use of the model is illustrated with a case study based on a real instance of a company located in Catalonia (Spain).

  7. Modelling white-water rafting suitability in a hydropower regulated Alpine River.

    Science.gov (United States)

    Carolli, Mauro; Zolezzi, Guido; Geneletti, Davide; Siviglia, Annunziato; Carolli, Fabiano; Cainelli, Oscar

    2017-02-01

    Cultural and recreational river ecosystem services and their relations with the flow regime are still poorly investigated. We develop a modelling-based approach to assess recreational flow requirements and the spatially distributed river suitability for white-water rafting, a typical service offered by mountain streams, with potential conflicts of interest with hydropower regulation. The approach is based on the principles of habitat suitability modelling using water depth as the main attribute, with preference curves defined through interviews with local rafting guides. The methodology allows to compute streamflow thresholds for conditions of suitability and optimality of a river reach in relation to rafting. Rafting suitability response to past, present and future flow management scenarios can be predicted on the basis of a hydrological model, which is incorporated in the methodology and is able to account for anthropic effects. Rafting suitability is expressed through a novel metric, the "Rafting hydro-suitability index" (RHSI) which quantifies the cumulative duration of suitable and optimal conditions for rafting. The approach is applied on the Noce River (NE Italy), an Alpine River regulated by hydropower production and affected by hydropeaking, which influences suitability at a sub-daily scale. A dedicated algorithm is developed within the hydrological model to resemble hydropeaking conditions with daily flow data. In the Noce River, peak flows associated with hydropeaking support rafting activities in late summer, highlighting the dual nature of hydropeaking in regulated rivers. Rafting suitability is slightly reduced under present, hydropower-regulated flow conditions compared to an idealized flow regime characterised by no water abstractions. Localized water abstractions for small, run-of-the-river hydropower plants are predicted to negatively affect rafting suitability. The proposed methodology can be extended to support decision making for flow

  8. Impact of Different Time Series Streamflow Data on Energy Generation of a Run-of-River Hydropower Plant

    Science.gov (United States)

    Kentel, E.; Cetinkaya, M. A.

    2013-12-01

    Global issues such as population increase, power supply crises, oil prices, social and environmental concerns have been forcing countries to search for alternative energy sources such as renewable energy to satisfy the sustainable development goals. Hydropower is the most common form of renewable energy in the world. Hydropower does not require any fuel, produces relatively less pollution and waste and it is a reliable energy source with relatively low operating cost. In order to estimate the average annual energy production of a hydropower plant, sufficient and dependable streamflow data is required. The goal of this study is to investigate impact of streamflow data on annual energy generation of Balkusan HEPP which is a small run-of-river hydropower plant at Karaman, Turkey. Two different stream gaging stations are located in the vicinity of Balkusan HEPP and these two stations have different observation periods: one from 1986 to 2004 and the other from 2000 to 2009. These two observation periods show different climatic characteristics. Thus, annual energy estimations based on data from these two different stations differ considerably. Additionally, neither of these stations is located at the power plant axis, thus streamflow observations from these two stream gaging stations need to be transferred to the plant axis. This requirement introduces further errors into energy estimations. Impact of different streamflow data and transfer of streamflow observations to plant axis on annual energy generation of a small hydropower plant is investigated in this study.

  9. A feasibility and implementation model of small-scale hydropower ...

    African Journals Online (AJOL)

    2016-10-04

    Oct 4, 2016 ... Several other site selection parameters were used to evaluate the Kwa Madiba potential small-scale hydropower site, which include accessibility by vehicle, current electrical grid con- nection and future electrical grid connectivity, environmental impact and social impact. Okot (2013) evaluates hydropower.

  10. Hydropower Regulatory and Permitting Information Desktop (RAPID) Toolkit

    Energy Technology Data Exchange (ETDEWEB)

    Levine, Aaron L [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-12-19

    Hydropower Regulatory and Permitting Information Desktop (RAPID) Toolkit presentation from the WPTO FY14-FY16 Peer Review. The toolkit is aimed at regulatory agencies, consultants, project developers, the public, and any other party interested in learning more about the hydropower regulatory process.

  11. The potential impacts of climate change on hydropower: An ...

    African Journals Online (AJOL)

    Osborne

    Climate change has the potential to affect hydropower generation by either increasing or reducing ... proven, mature, efficient and cost competitive renewable energy source. Hydropower requires relatively high initial investment but has low operation costs and it offers ... areas to global warming because water resources are.

  12. Dan jiang kou hydropower station turbine refurbishment

    Science.gov (United States)

    Zhang, R. Y.; Nie, S. Q.; Bazin, D.; Cheng, J. H.

    2012-11-01

    Dan jiangkou hydropower station refurbished project, isan important project of Chinese refurbishment market. Tianjin Alstom Hydro Co., ltd won this contract by right of good performance and design technology,Its design took into account all the constraints linked to the existing frame. It results in a specific and highly advanced shape.The objective of this paper is to introduce the successful turbine hydraulic design, model test and mechanical design of Dan jiangkou project; and also analyze the cavitation phenomena occurred on runner band surface of Unit 4 after putting into commercial operation. These technology and feedback shall be a good reference and experience for other similar projects

  13. U.S. hydropower resource assessment for Idaho

    Energy Technology Data Exchange (ETDEWEB)

    Conner, A.M.; Francfort, J.E.

    1998-08-01

    The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the US. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering and Environmental Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of Idaho.

  14. U.S. hydropower resource assessment for Ohio

    Energy Technology Data Exchange (ETDEWEB)

    Conner, A.M.; Francfort, J.E.

    1997-12-01

    The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the US. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of Ohio.

  15. U.S. hydropower resource assessment for Michigan

    Energy Technology Data Exchange (ETDEWEB)

    Conner, A.M.; Francfort, J.E.

    1998-02-01

    The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the US. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering and Environmental Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of Michigan.

  16. U.S. hydropower resource assessment for New York

    Energy Technology Data Exchange (ETDEWEB)

    Conner, A.M.; Francfort, J.E.

    1998-08-01

    The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the United States. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering and Environmental Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of New York.

  17. U.S. hydropower resource assessment for Connecticut

    Energy Technology Data Exchange (ETDEWEB)

    Francfort, J.E.; Rinehart, B.N.

    1995-07-01

    The Department of Energy is developing an estimate of the undeveloped hydro-power potential in the United States. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The software measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven software program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of Connecticut.

  18. U.S. hydropower resource assessment for Maine

    Energy Technology Data Exchange (ETDEWEB)

    Francfort, J.E.; Rinehart, B.N.

    1995-07-01

    The Department of Energy is developing an estimate of the undeveloped hydro-power potential in the United States. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. The software measures the undeveloped hydropower resources available in the United States, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven software program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report details the resource assessment results for the State of Maine.

  19. U.S. hydropower resource assessment for Nevada

    Energy Technology Data Exchange (ETDEWEB)

    Conner, A.M.; Francfort, J.E.

    1997-10-01

    The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the US. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of Nevada.

  20. U.S. hydropower resource assessment for Illinois

    Energy Technology Data Exchange (ETDEWEB)

    Conner, A.M.; Francfort, J.E.

    1997-01-01

    The US Department of Energy is developing an estimate of the undeveloped hydropower potential in the US. The Hydropower Evaluation Software (HES) is a computer model that was developed by the Idaho National Engineering Laboratory for this purpose. HES measures the undeveloped hydropower resources available in the US, using uniform criteria for measurement. The software was developed and tested using hydropower information and data provided by the Southwestern Power Administration. It is a menu-driven program that allows the personal computer user to assign environmental attributes to potential hydropower sites, calculate development suitability factors for each site based on the environmental attributes present, and generate reports based on these suitability factors. This report describes the resource assessment results for the State of Illinois.

  1. 15 CFR 713.4 - Advance declaration requirements for additionally planned production, processing, or consumption...

    Science.gov (United States)

    2010-01-01

    ... additionally planned production, processing, or consumption of Schedule 2 chemicals. 713.4 Section 713.4..., processing, or consumption of Schedule 2 chemicals. (a) Declaration requirements for additionally planned activities. (1) You must declare additionally planned production, processing, or consumption of Schedule 2...

  2. 76 FR 30937 - Small Hydropower Development in the United States; Notice of Small/Low-Impact Hydropower Webinar

    Science.gov (United States)

    2011-05-27

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Small Hydropower Development in the United States; Notice of Small/Low-Impact Hydropower Webinar The Federal Energy Regulatory Commission (FERC) will host a Small/ Low-Impact...

  3. Retrofitting of the hydro-power installation of Vicques, Switzerland; Rehabilitation de la centrale de Vicques, Emile Aebin SA. Etude d'avant-projet

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-04-15

    This technical report for the Swiss Federal Office of Energy (SFOE) reports on work involved in obtaining a new concession for the use of the water in the mill canal in Vicques, Switzerland on the Scheulte river. The author states that the existing concession for use is not optimal and should be optimised. A window of opportunity exists as a new river protection law requires a higher residual water flow rate and the creation of a fish passage facility. The paper discusses how the production of electrical energy could be doubled. The existing installation is described. Details of existing conduits and the installed power generator are presented. The measures proposed for the renewal of the hydro-power plant are described. An annex includes a copy of the construction plans.

  4. Fuzzy production planning models for an unreliable production system with fuzzy production rate and stochastic/fuzzy demand rate

    Directory of Open Access Journals (Sweden)

    K. A. Halim

    2011-01-01

    Full Text Available In this article, we consider a single-unit unreliable production system which produces a single item. During a production run, the production process may shift from the in-control state to the out-of-control state at any random time when it produces some defective items. The defective item production rate is assumed to be imprecise and is characterized by a trapezoidal fuzzy number. The production rate is proportional to the demand rate where the proportionality constant is taken to be a fuzzy number. Two production planning models are developed on the basis of fuzzy and stochastic demand patterns. The expected cost per unit time in the fuzzy sense is derived in each model and defuzzified by using the graded mean integration representation method. Numerical examples are provided to illustrate the optimal results of the proposed fuzzy models.

  5. River flow availability for environmental flow allocation downstream of hydropower facilities in the Kafue Basin of Zambia

    Science.gov (United States)

    Kalumba, Mulenga; Nyirenda, Edwin

    2017-12-01

    The Government of the Republic Zambia (GRZ) will install a new hydropower station Kafue Gorge Lower downstream of the existing Kafue Gorge Station (KGS) and plans to start operating the Itezhi-Tezhi (ITT) hydropower facility in the Kafue Basin. The Basin has significant biodiversity hot spots such as the Luangwa National park and Kafue Flats. It is described as a Man-Biosphere reserve and the National Park is a designated World Heritage Site hosting a variety of wildlife species. All these natural reserves demand special protection, and environmental flow requirements (e-flows) have been identified as a necessary need to preserve these ecosystems. Implementation of e-flows is therefore a priority as Zambia considers to install more hydropower facilities. However before allocation of e-flows, it is necessary to first assess the river flow available for allocation at existing hydropower stations in the Kafue Basin. The river flow availability in the basin was checked by assessing the variability in low and high flows since the timing, frequency and duration of extreme droughts and floods (caused by low and high flows) are all important hydrological characteristics of a flow regime that affects e-flows. The river flows for a 41 year monthly time series data (1973-2014) were used to extract independent low and high flows using the Water Engineering Time Series Processing Tool (WETSPRO). The low and high flows were used to construct cumulative frequency distribution curves that were compared and analysed to show their variation over a long period. A water balance of each hydropower station was used to check the river flow allocation aspect by comparing the calculated water balance outflow (river flow) with the observed river flow, the hydropower and consumptive water rights downstream of each hydropower station. In drought periods about 50-100 m3/s of riverflow is available or discharged at both ITT and KGS stations while as in extreme flood events about 1300-1500 m3/s

  6. 75 FR 55776 - Request for Comments on Vaccine Production and Additional Planning for Future Possible Pandemic...

    Science.gov (United States)

    2010-09-14

    ... International Trade Administration Request for Comments on Vaccine Production and Additional Planning for Future... comments from the public and relevant industries on vaccine production and additional planning for future... industries and interested members of the public on a number of issues regarding vaccine production for...

  7. Using Conventional Hydropower to Help Alleviate Variable Resource Grid Integration Challenges in the Western U.S

    Science.gov (United States)

    Veselka, T. D.; Poch, L.

    2011-12-01

    Integrating high penetration levels of wind and solar energy resources into the power grid is a formidable challenge in virtually all interconnected systems due to the fact that supply and demand must remain in balance at all times. Since large scale electricity storage is currently not economically viable, generation must exactly match electricity demand plus energy losses in the system as time unfolds. Therefore, as generation from variable resources such as wind and solar fluctuate, production from generating resources that are easier to control and dispatch need to compensate for these fluctuations while at the same time respond to both instantaneous change in load and follow daily load profiles. The grid in the Western U.S. is not exempt to grid integration challenges associated with variable resources. However, one advantage that the power system in the Western U.S. has over many other regional power systems is that its footprint contains an abundance of hydropower resources. Hydropower plants, especially those that have reservoir water storage, can physically change electricity production levels very quickly both via a dispatcher and through automatic generation control. Since hydropower response time is typically much faster than other dispatchable resources such as steam or gas turbines, it is well suited to alleviate variable resource grid integration issues. However, despite an abundance of hydropower resources and the current low penetration of variable resources in the Western U.S., problems have already surfaced. This spring in the Pacific Northwest, wetter than normal hydropower conditions in combination with transmission constraints resulted in controversial wind resource shedding. This action was taken since water spilling would have increased dissolved oxygen levels downstream of dams thereby significantly degrading fish habitats. The extent to which hydropower resources will be able to contribute toward a stable and reliable Western grid is

  8. Realizing block planning concepts in make-and-pack production using MILP modelling and SAP APO

    DEFF Research Database (Denmark)

    Günther, H.O.; Grunow, M.; Neuhaus, U.

    2006-01-01

    In the industrial application environment considered, different variants of a basic product type are produced using the same resources and following the same basic process plan. To support production planning and scheduling for this type of production system, the concept of block planning...... is introduced, which has gained considerable attention, particularly in the consumer goods industry. A block represents a pre-defined sequence of production orders of variable size. In order to demonstrate the practical applicability of the proposed block planning concept, we consider the production system...... of a major producer of hair dyes as a case study. We present two different implementations of the block planning concept. One utilizes the Production Planning/Detailed Scheduling module of the SAP APO© software. The other approach is based on a mixed-integer linear programming formulation. In contrast...

  9. Aggregate Production Planning, Casestudy in a Medium-sized Industry of the Rubber Production Line in Ecuador.

    Science.gov (United States)

    Rosero-Mantilla, César; Sánchez-Sailema, Mayra; Sánchez-Rosero, Carlos; Galleguillos-Pozo, Rosa

    2017-06-01

    This research aims to improve the productivity in the rubber line of a medium-sized industry by increasing the production capacities through the use of the Aggregate Production Planning model. For this purpose an analysis of the production processes of the line was made and the aggregate plan was defined evaluating two strategies: Exact Production Plan (Zero Inventory) and Constant Workforce Plan (Vary Inventory) by studying the costs of both inventory maintenance and workforce. It was also determined how the installed capacity was used with the standards of the rubber line and measures for decreasing production costs were proposed. It was proven that only 70% of the plant capacity was being used so it could be possible to produce more units and to obtain a bigger market for the products of this line.+

  10. A Multiobjective Fuzzy Aggregate Production Planning Model Considering Real Capacity and Quality of Products

    Directory of Open Access Journals (Sweden)

    Najmeh Madadi

    2014-01-01

    Full Text Available In this study, an attempt has been made to develop a multiobjective fuzzy aggregate production planning (APP model that best serves those companies whose aim is to have the best utilization of their resources in an uncertain environment while trying to keep an acceptable degree of quality and customer service level simultaneously. In addition, the study takes into account the performance and availability of production lines. To provide the optimal solution to the proposed model, first it was converted to an equivalent crisp multiobjective model and then goal programming was applied to the converted model. At the final step, the IBM ILOG CPLEX Optimization Studio software was used to obtain the final result based on the data collected from an automotive parts manufacturing company. The comparison of results obtained from solving the model with and without considering the performance and availability of production lines, revealed the significant importance of these two factors in developing a real and practical aggregate production plan.

  11. Value-Creation Potential from Multi-Market Trading for a Hydropower Producer

    Directory of Open Access Journals (Sweden)

    Marte Fodstad

    2017-12-01

    Full Text Available We study a hydropower producer’s potential for value-creation from multi-market trading given the price variations in the markets and the flexibility provided through access to hydro reservoirs. We use a perfect foresight optimization model for a price-taking hydropower producer co-optimizing his trades in the day-ahead, intra-day and balancing markets. The model is used on real market data from Norway, Sweden and Germany. The study shows a theoretical potential for added value when selling energy in multiple markets relative to optimal day-ahead sale. Most of this value is achievable also when the perfect foresight is limited to the period from day-ahead bidding until operation. Flexible production plants achieve the largest relative added values for multi-market sales, and has the largest benefit from a long horizon with perfect foresight.

  12. Path Transmissibility Analysis Considering Two Types of Correlations in Hydropower Stations

    Directory of Open Access Journals (Sweden)

    Baoping Zhi

    2013-01-01

    Full Text Available A new vibration model is built by introducing the head-cover vibration transfer path based on a previous analysis of the vertical vibration model for hydropower station units and powerhouses. This research focuses on disturbance- and parameter-related transfer paths in a practical situation. In a complex situation, the application of the stochastic perturbation method is expanded using an algebra synthesis method the Hadamard product, and theoretical analyses, and numerical simulations of transfer paths in the new vibration model are carried out through the expanded perturbation method. The path transfer force, the path transmissibility, and the path disturbance ranges in the frequency domain are provided. The results indicate that the methods proposed in this study can efficiently reduce the disturbance range and can accurately analyze the transfer paths of hydraulic-source vertical vibration in hydropower stations.

  13. Life Cycle Assessment of a Small Hydropower Plant in the Brazilian Amazon

    Directory of Open Access Journals (Sweden)

    Marla Geller

    2016-12-01

    Full Text Available Brazil as well as the rest of the world, faces a major challenge related to the electricity sector, to meet the growing demand with energy production from renewable sources. Many hydroelectric plants are being implemented, especially in the northern region of Brazil, but its environmental impacts are yet unknown. Energy produced by hydropower plants has been considered totally renewable and clean, but more recent studies describe analysis pointing to the existence of emissions by hydroelectric plants, especially if a lifecycle approach is considered. Thus, the objective of this study is the investigation of environmental impacts of the construction, operation and decommissioning of a hydroelectric power station based on Life-Cycle Assessment. The main focus is the Curuá-Una hydropower plant that is located in the Amazon forest in northern Brazil, in Santarém municipality (Pará state. 

  14. Development of hydropower energy in Turkey: The case of Coruh river basin

    Energy Technology Data Exchange (ETDEWEB)

    Akpinar, Adem [Guemueshane University, Civil Engineering Department, 29000 Guemueshane (Turkey); Koemuercue, Murat ihsan; Kankal, Murat [Karadeniz Technical University, Civil Engineering Department, 61080 Trabzon (Turkey)

    2011-02-15

    The main objective in doing the present study is to investigate the sustainable development of hydropower plants in the Coruh river basin of Turkey, which is least problem river of Turkey in respect to international cooperation as compared with Turkey's other trans-boundary waters. Initial studies concerning the hydropower production potential in Coruh basin had been carried out by Turkish authorities in the late 1960s. Total installed power capacity and annual average energy generation of 37 dams and run of river (without storage) hydropower plants developed at various project stages by The Electrical Power Resources Survey and Development Administration (EiE) in Coruh basin are 3132.70 MW and 10.55 TWh/yr, respectively. Today, this generation value corresponds 6.45% of Turkey's energy consumption in 2006 while it meets 6.3% of total electricity energy production of Turkey which is equal to 167.9 TWh/yr in 2006. Besides, this potential developed at various project stages in Coruh basin will provide 24.1% of Turkey's hydroelectric energy generation being equal to 43.8 TWh/yr in 2006. (author)

  15. Assessing Environmental Justice in Large Hydropower Projects: The Case of São Luiz do Tapajós in Brazil

    Directory of Open Access Journals (Sweden)

    Christoph Ernst Emil Hess

    2016-05-01

    Full Text Available Electricity supply in a sustainable manner is one of the greatest challenges for human society today. Hydropower is by far the most important renewable electricity technology, but equally far from uncontroversial. Indeed, it is situated at the crossroad of socio-environmentalism trends, as strongly promoted by some as opposed by other environmentalist arguments, organisations and movements. This paper suggests Environmental Justice as an alternative approach on how to incorporate sustainability into energy planning, particularly in hydropower projects. Whereas several methods have been developed to assess Environmental Justice in an urban context, little attention has been given to electricity projects so far. A qualitative method to assess hydropower projects regarding their performance in Environmental Justice is discussed and illustrated in the case of the large hydropower project São Luiz do Tapajós in the Brazilian Amazon. As will be shown, fundamental change is necessary in Brazil if energy planning in general and hydropower projects in particular are to meet the principles of Environmental Justice.

  16. The application of dynamic programming in production planning

    Science.gov (United States)

    Wu, Run

    2017-05-01

    Nowadays, with the popularity of the computers, various industries and fields are widely applying computer information technology, which brings about huge demand for a variety of application software. In order to develop software meeting various needs with most economical cost and best quality, programmers must design efficient algorithms. A superior algorithm can not only soul up one thing, but also maximize the benefits and generate the smallest overhead. As one of the common algorithms, dynamic programming algorithms are used to solving problems with some sort of optimal properties. When solving problems with a large amount of sub-problems that needs repetitive calculations, the ordinary sub-recursive method requires to consume exponential time, and dynamic programming algorithm can reduce the time complexity of the algorithm to the polynomial level, according to which we can conclude that dynamic programming algorithm is a very efficient compared to other algorithms reducing the computational complexity and enriching the computational results. In this paper, we expound the concept, basic elements, properties, core, solving steps and difficulties of the dynamic programming algorithm besides, establish the dynamic programming model of the production planning problem.

  17. Assessing Impacts of Hydropower Regulation on Salmonid Habitat Connectivity to Guide River Restoration

    Science.gov (United States)

    Buddendorf, Bas; Geris, Josie; Malcolm, Iain; Wilkinson, Mark; Soulsby, Chris

    2016-04-01

    Anthropogenic activity in riverine ecosystems has led to a substantial divergence from the natural state of many rivers globally. Many of Scotland's rivers have been regulated for hydropower with increasing intensity since the 1890s. At the same time they sustain substantial populations of Atlantic Salmon (Salmo salar L.), which have a range of requirements in terms of flow and access to habitat, depending on the different life-stages. River barriers for hydropower regulation can change the spatial and temporal connectivity within river networks, the impacts of which on salmon habitat are not fully understood. Insight into such changes in connectivity, and the link with the distribution and accessibility of suitable habitat and areas of high productivity, are essential to aid restoration and/or conservation efforts. This is because they indicate where such efforts might have a higher chance of being successful in terms of providing suitable habitat and increasing river productivity. In this study we applied a graph theory approach to assess historic (natural) and contemporary (regulated) in-stream habitat connectivity of the River Lyon, an important UK salmon river that is moderately regulated for hydropower. Historic maps and GIS techniques were used to construct the two contrasting river networks (i.e., natural vs. regulated). Subsequently, connectivity metrics were used to assess the impacts of hydropower infrastructure on upstream and downstream migration possibilities for adults and juveniles, respectively. A national juvenile salmon production model was used to weight the importance of reaches for juvenile salmon production. Results indicate that the impact of barriers in the Lyon on the connectivity indices depends on the type of barrier and its location within the network, but is generally low for both adults and juveniles, and that compared to the historic river network the reduction in the amount of suitable habitat and juvenile production is most marked

  18. An MILP approach to shelf life integrated planning and scheduling in scalded sausage production

    DEFF Research Database (Denmark)

    Günther, H.O.; van Beek, P.; Grunow, Martin

    2006-01-01

    In the production of perishable products such as dairy, meat, or bakery goods, the consideration of shelf life in production planning is of particular importance. Retail customers with relatively low inventory turns can benefit significantly from longer product shelf life as wastage and out......-of-stock rates decrease. However, in today’s production planning and control systems shelf life issues with regard to specific products or customers are seldom taken into account. Therefore the objective of this paper is to pay attention to these issues. The way to do that is by means of optimization models...... in which shelf life aspects are integrated into operational production planning and scheduling functions. Specifically we make use of so-called Mixed Integer Linear Programming (MILP) models. Our research is based on an industrial case study of yogurt production. Relying on the principle of block planning...

  19. Assessment of risks due to climate change for the Upper Tamakoshi Hydropower Project in Nepal

    Directory of Open Access Journals (Sweden)

    Sangam Shrestha

    2016-01-01

    Full Text Available Climate change poses significant challenges to hydropower development and management in mountainous basins. This study examined the impact of climate change, and the associated risks, on the energy production of the Upper Tamakoshi Hydropower Project, which is located in the Tamakoshi basin of Nepal. The outputs of three GCMs—namely MIROC-ESM, MRI-CGCM3, and MPI-ESM-M—under the Representative Concentration Pathways (RCP scenarios were used for the projection of precipitation and temperature in the future. The minimum and maximum temperatures of the basin are projected to increase by 6.33 °C and 3.82 °C, respectively, by 2100. The projected precipitation varies from −8% to +24.8%, which is expected to alter the streamflow by −37.83% to +47% in the future. Based on the streamflow output, the risk for energy production was calculated with respect to the baseline energy production of 1963 GW h and 2281 GW h. Using the three GCMs, the risk associated with annual hydropower production under altered runoff was analyzed. The risk percentage in the future periods shows a mild risk varying from 0.69% to 6.63%. MPI-ESM-M GCM projects a higher percentage of risk for energy production during the same future periods, as compared to the baseline energy production of 1963 GW h. A mild to moderate risk, ranging from 2.73% to 13.24% can be expected when energy production in the future is compared to the baseline energy production of 2281 GW h.

  20. Rethinking Pumped Storage Hydropower in the European Alps: A Call for New Integrated Assessment Tools to Support the Energy Transition

    Directory of Open Access Journals (Sweden)

    Astrid Björnsen Gurung

    2016-05-01

    Full Text Available The European Alps are well positioned to contribute significantly to the energy transition. In addition to sites with above-average potential for wind and solar power, the “water towers” of Europe provide flexible, low-carbon power generation as well as energy storage. In the future, hydropower systems are expected to become more than mere electricity generators, serving a key role as flexible complements to intermittent power generators and as providers of large-scale seasonal and daily energy storage. Energy transition on national and European scales can be facilitated by expanding the capacity of pumped storage hydropower (PSHP plants. Yet the extension of hydropower production, in particular PSHP, remains controversial, primarily due to environmental concerns. Focusing on 2 Alpine countries, Austria and Switzerland, this paper provides a system view of hydropower production and energy storage in the Alps. It discusses advantages and drawbacks of various assessment tools and identifies gaps and needs for the integrated assessment of PSHP plants. It concludes that instruments that evaluate the impacts and sustainability of PSHP projects need to be developed, elaborated, and applied in a participatory manner, in order to promote public dialogue, increase social acceptance, and, ideally, encourage energy consumers to become advocates of a sustainable energy future.

  1. Standard Modular Hydropower Technology Acceleration Workshop: Summary Report

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Brennan T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); DeNeale, Scott T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Witt, Adam M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Mobley, Miles H. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Fernandez, Alisha R. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2017-08-01

    In support of the Department of Energy (DOE) funded Standard Modular Hydropower (SMH) Technology Acceleration project, Oak Ridge National Laboratory (ORNL) staff convened with five small hydropower technology entrepreneurs on June 14 and 15, 2017 to discuss gaps, challenges, and opportunities for small modular hydropower development. The workshop was designed to walk through SMH concepts, discuss the SMH research vision, assess how each participant’s technology aligns with SMH concepts and research, and identify future pathways for mutually beneficial collaboration that leverages ORNL expertise and entrepreneurial industry experience. The goal coming out of the workshop is to advance standardized, scalable, modular hydropower technologies and development approaches with sustained and open dialogue among diverse stakeholder groups.

  2. A production model and maintenance planning model for the process industry

    OpenAIRE

    Ashayeri, J.; Teelen, A.; Selen, W.J.

    1995-01-01

    In this paper a model is developed to simultaneously plan preventive maintenance and production in a process industry environment, where maintenance planning is extremely important. The model schedules production jobs and preventive maintenance jobs, while minimizing costs associated with production, backorders, corrective maintenance and preventive maintenance. The formulation of the model is flexible, so that it can be adapted to several production situations. The performance of the model i...

  3. Hydropower and Water Framework Directive. Appendix 2 to 4; Wasserkraftnutzung und Wasserrahmenrichtlinien. Anhang 2 bis 4

    Energy Technology Data Exchange (ETDEWEB)

    Keuneke, Rita; Dumont, Ulrich [Ingenieurbuero Floecksmuehle, Aachen (Germany)

    2011-11-15

    The contribution under consideration contains the appendices 2 to 4 to the environmental research plan of the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (Berlin, Federal Republic of Germany) on ''Hydropower and Water Framework Directive''. Appendix 2 reports on the fundamentals for the design of fish bypass facilities, fish protection and fish migration facilities, minimum outflow in discharge lines, water ecologic evaluation, determination of less generation of hydroelectric power plants. Appendix 3 contains illustrations. Appendix 4 presents an extract from the final report.

  4. Determination of installation capacity in reservoir hydro-power plants considering technical, economical and reliability indices

    DEFF Research Database (Denmark)

    Hosseini, S.M.H.; Forouzbakhsh, Farshid; Fotouh-Firuzabad, Mahmood

    2008-01-01

    One of the most important issues in planning the ‘‘reservoir” type of hydro-power plants (HPP) is to determine the installation capacity of the HPPs and estimate its annual energy value. In this paper, a method is presented. A computer program has been developed to analyze energy calculation...... the technical, economic and reliability indices will determine the installation capacity of an HPP. By applying the above-mentioned algorithm to an existing HPP named ‘‘Bookan” (located in the westnorth of Iran); the capacity of 30 MW is obtained....

  5. Hydropower's Contribution to Energy Security

    Energy Technology Data Exchange (ETDEWEB)

    Altinbilek, D.; Abdel-Malek, R.; Devernay, J.M.; Gill, R.; Leney, S.; Moss, Terry; Schiffer, H.P.; Taylor, R.M.

    2007-07-01

    The role of hydropower within mixed power systems is analysed from the point of view of both quantitative and qualitative performance. Interrelationships with all other generation technologies are discussed and synergies identified. Resources, sustainability criteria and investment challenges are reviewed in the context of development. The objective of the paper is to define hydropower's contribution within the clean, clever and competitive markets of the future.

  6. Hydropower assessment of Bolivia—A multisource satellite data and hydrologic modeling approach

    Science.gov (United States)

    Velpuri, Naga Manohar; Pervez, Shahriar; Cushing, W. Matthew

    2016-11-28

    (TRMM) reanalysis product (3B43) had the highest accuracies. The coarse-resolution (25-km) TRMM data were disaggregated to 5-km pixels using climatology information obtained from the Climate Hazards Group Infrared Precipitation with Stations dataset. About a 17-percent bias was observed in the disaggregated TRMM estimates, which was corrected using the station observations. The bias-corrected, disaggregated TRMM precipitation estimate was used to compute stream discharge using a regionalization approach. In regionalization approach, required homogeneous regions for Bolivia were derived from precipitation patterns and topographic characteristics using a k-means clustering approach. Using the discharge and head height estimates for each 1-km stream segment, we computed hydropower potential for 316,490 stream segments within Bolivia and that share borders with Bolivia. The total theoretical hydropower potential (TTHP) of these stream segments was found to be 212 gigawatts (GW). Out of this total, 77.4 GW was within protected areas where hydropower projects cannot be developed; hence, the remaining total theoretical hydropower in Bolivia (outside the protected areas) was estimated as 135 GW. Nearly 1,000 1-km stream segments, however, were within the boundaries of existing hydropower projects. The TTHP of these stream segments was nearly 1.4 GW, so the residual TTHP of the streams in Bolivia was estimated as 133 GW. Care should be exercised to understand and interpret the TTHP identified in this study because all the stream segments identified and assessed in this study cannot be harnessed to their full capacity; furthermore, factors such as required environmental flows, efficiency, economics, and feasibility need to be considered to better identify a more real-world hydropower potential. If environmental flow requirements of 20–40 percent are considered, the total theoretical power available reduces by 60–80 percent. In addition, a 0.72 efficiency factor further

  7. Planning and scheduling of the make-and-pack dairy production under lifetime uncertainty

    NARCIS (Netherlands)

    Sel, Çağrı; Bilgen, Bilge; Bloemhof-Ruwaard, Jacqueline

    2017-01-01

    In the dairy processing, the rapid quality decay of milk-based intermediate mixture to make and pack restricts productivity and, forces organizations to carefully plan and schedule their production. Hereby, in this study, we consider a planning and scheduling problem encountered in the dairy

  8. Improving production planning and scheduling processes at an Industrial/Agricultural Chain Manufacturer

    OpenAIRE

    Tandon, Ramit

    2008-01-01

    A key question which every manufacturing firm, irrespective of its scale faces is about deriving an appropriate production planning and control mechanism that enables it to effectively cater to the market demand along with improving profitability. This project looks at applicability of Material Requirement Planning, Just in Time and Theory of Constraints as production planning and control mechanisms with a specific focus on applying them at Renold Chain Plant in Bredbuy, Stockport, Manchester...

  9. Impact of climate change and water use policies on hydropower potential in the south-eastern Alpine region.

    Science.gov (United States)

    Majone, Bruno; Villa, Francesca; Deidda, Roberto; Bellin, Alberto

    2016-02-01

    Climate change is expected to cause alterations of streamflow regimes in the Alpine region, with possible relevant consequences for several socio-economic sectors including hydropower production. The impact of climate change on water resources and hydropower production is evaluated with reference to the Noce catchment, which is located in the Southeastern Alps, Italy. Projected changes of precipitation and temperature, derived from an ensemble of 4 climate model (CM) runs for the period 2040-2070 under the SRES A1B emission scenario, have been downscaled and bias corrected before using them as climatic forcing in a hydrological model. Projections indicate an increase of the mean temperature of the catchment in the range 2-4K, depending on the climate model used. Projections of precipitation indicate an increase of annual precipitation in the range between 2% and 6% with larger changes in winter and autumn. Hydrological simulations show an increase of water yield during the period 2040-2070 with respect to 1970-2000. Furthermore, a transition from glacio-nival to nival regime is projected for the catchment. Hydrological regime is expected to change as a consequence of less winter precipitation falling as snow and anticipated melting in spring, with the runoff peak decreasing in intensity and anticipating from July to June. Changes in water availability reflect in the Technical Hydropower Potential (THP) of the catchment, with larger changes projected for the hydropower plants located at the highest altitudes. Finally, the impacts on THP of water use policies such as the introduction of prescriptions for minimum ecological flow (MEF) have been analyzed. Simulations indicate that in the lower part of the catchment reduction of the hydropower production due to MEF releases from the storage reservoirs counterbalances the benefits associated to the projected increases of inflows as foreseen by simulations driven only by climate change. Copyright © 2015 Elsevier B.V. All

  10. Bridging the Information Gap: Remote Sensing and Micro Hydropower Feasibility in Data-Scarce Regions

    Science.gov (United States)

    Muller, Marc Francois

    Access to electricity remains an impediment to development in many parts of the world, particularly in rural areas with low population densities and prohibitive grid extension costs. In that context, community-scale run-of-river hydropower---micro-hydropower---is an attractive local power generation option, particularly in mountainous regions, where appropriate slope and runoff conditions occur. Despite their promise, micro hydropower programs have generally failed to have a significant impact on rural electrification in developing nations. In Nepal, despite very favorable conditions and approximately 50 years of experience, the technology supplies only 4% of the 10 million households that do not have access to the central electricity grid. These poor results point towards a major information gap between technical experts, who may lack the incentives or local knowledge needed to design appropriate systems for rural villages, and local users, who have excellent knowledge of the community but lack technical expertise to design and manage infrastructure. Both groups suffer from a limited basis for evidence-based decision making due to sparse environmental data available to support the technical components of infrastructure design. This dissertation draws on recent advances in remote sensing data, stochastic modeling techniques and open source platforms to bridge that information gap. Streamflow is a key environmental driver of hydropower production that is particularly challenging to model due to its stochastic nature and the complexity of the underlying natural processes. The first part of the dissertation addresses the general challenge of Predicting streamflow in Ungauged Basins (PUB). It first develops an algorithm to optimize the use of rain gauge observations to improve the accuracy of remote sensing precipitation measures. It then derives and validates a process-based model to estimate streamflow distribution in seasonally dry climates using the stochastic

  11. Integrated production planning and control: A multi-objective optimization model

    Directory of Open Access Journals (Sweden)

    Cheng Wang

    2013-09-01

    Full Text Available Purpose: Production planning and control has crucial impact on the production and business activities of enterprise. Enterprise Resource Planning (ERP is the most popular resources planning and management system, however there are some shortcomings and deficiencies in the production planning and control because its core component is still the Material Requirements Planning (MRP. For the defects of ERP system, many local improvement and optimization schemes have been proposed, and improve the feasibility and practicality of the plan in some extent, but study considering the whole planning system optimization in the multiple performance management objectives and achieving better application performance is less. The purpose of this paper is to propose a multi-objective production planning optimization model Based on the point of view of the integration of production planning and control, in order to achieve optimization and control of enterprise manufacturing management. Design/methodology/approach: On the analysis of ERP planning system’s defects and disadvantages, and related research and literature, a multi-objective production planning optimization model is proposed, in addition to net demand and capacity, multiple performance management objectives, such as on-time delivery, production balance, inventory, overtime production, are considered incorporating into the examination scope of the model, so that the manufacturing process could be management and controlled Optimally between multiple objectives. The validity and practicability of the model will be verified by the instance in the last part of the paper. Findings: The main finding is that production planning management of manufacturing enterprise considers not only the capacity and materials, but also a variety of performance management objectives in the production process, and building a multi-objective optimization model can effectively optimize the management and control of enterprise

  12. An MILP modeling approach for shelf life integrated planning in yoghurt production

    NARCIS (Netherlands)

    Lütke Entrup, M.; Grunow, M.; Günther, H.O.; Seiler, T.; Beek, van P.

    2005-01-01

    In the production of perishable products such as dairy, meat, or bakery goods, the consideration of shelf life in production planning is of particular importance. Retail customers with relatively low inventory turns can benefit significantly from longer product shelf life as wastage and out-of-stock

  13. Short-term Hydropower Reservoir Operations in Chile's Central Interconnected System: Tradeoffs between Hydrologic Alteration and Economic Performance

    Science.gov (United States)

    Olivares, M. A.

    2011-12-01

    Hydropower accounts for about 50% of the installed capacity in Chile's Central Interconnected System (CIS) and new developments are envisioned in the near future. Large projects involving reservoirs are perceived negatively by the general public. In terms of operations, hydropower scheduling takes place at monthly, weekly, daily and hourly intervals, and operations at each level affect different environmental processes. Due to its ability to quickly and inexpensively respond to short-term changes in demand, hydropower reservoirs often are operated to provide power during periods of peak demand. This operational scheme, known as hydropeaking, changes the hydrologic regime by altering the rate and frequency of changes in flow magnitude on short time scales. To mitigate impacts on downstream ecosystems, operational constraints -typically minimum instream flows and maximum ramping rates- are imposed on hydropower plants. These operational restrictions limit reduce operational flexibility and can reduce the economic value of energy generation by imposing additional costs on the operation of interconnected power systems. Methods to predict the degree of hydrologic alteration rely on statistical analyses of instream flow time series. Typically, studies on hydrologic alteration use historical operational records for comparison between pre- and post-dam conditions. Efforts to assess hydrologic alteration based on future operational schemes of reservoirs are scarce. This study couples two existing models: a mid-term operations planning and a short-term economic dispatch to simulate short-term hydropower reservoir operations under different future scenarios. Scenarios of possible future configurations of the Chilean CIS are defined with emphasis on the introduction of non-conventional renewables (particularly wind energy) and large hydropower projects in Patagonia. Both models try to reproduce the actual decision making process in the Chilean Central Interconnected System

  14. National Contingency Plan (NCP) Subpart J Product Schedule Fact Sheet

    Science.gov (United States)

    This section of the National Oil and Hazardous Substances Pollution Contingency Plan stipulates the criteria for listing and managing the use of dispersants and other chemical and biological agents used to mitigate oil spills.

  15. Planning and accomplishment narrative: Northwest Montana Waterfowl Production Area [1973

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This planning and accomplishments narrative report for Northwest Montana Wetland Management District outlines Refuge accomplishments during the 1973 calendar year....

  16. Production planning and coronal stop deletion in spontaneous speech

    National Research Council Canada - National Science Library

    James Tanner; Morgan Sonderegger; Michael Wagner

    2017-01-01

    .... We examine coronal stop deletion (CSD), a variable process conditioned by preceding and upcoming phonological context, in a corpus of spontaneous British English speech, as a means of investigating a number of variables associated with planning...

  17. A Model of Production Planning with Multi-product, Multi time period and Multi-Objective with Fuzzy Parameters

    Directory of Open Access Journals (Sweden)

    mostafa gholamrezaii rahimi

    2015-09-01

    Full Text Available Production planning is one of the most important tasks of production and operations management and decides to determine the optimum amount of production, labor and inventory levels for each period of planning horizon with regard to productive resources and limits. This research presents a multi-product and multi-objective model of production planning with fuzzy parameters and soft constraints regarding the time value of money, inventory level, labor, capacity of machines and warehouse space. The proposed model attempts to maximize profit of the sale and minimize carrying and backordering costs and changes in labor levels. Case study conducted in the aluminum factory, shows the performance of this model comparing the current situation.

  18. Siphon-based turbine - Demonstration project: hydropower plant at a paper factory in Perlen, Switzerland; Demonstrationsprojekt Saugheber - Turbinen. Wasserturbinenanlage Papierfabrik Perlen (WTA-PF)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    This final report for the Swiss Federal Office of Energy (SFOE) describes the demonstration project that concerned the re-activation and refurbishing of a very low-head hydropower installation. The functional principles of the siphon-turbine used are explained and the potential for its use at many low-head sites examined. The authors are of the opinion that innovative technology and simple mechanical concepts could be used to reactivate out-of-use hydropower plant or be used to refurbish existing plant to provide increased efficiency and reliability. Various other points that are to be considered when planning the refurbishment of a hydropower plant such as retaining mechanical and hydraulic symmetry in the plant are listed and concepts for reducing operating costs are discussed. Figures on the three runner-regulated turbines installed in Perlen are quoted.

  19. Advanced hydropower turbine: AHTS-Advanced Hydropower Turbine System Program; Turbinas hidraulicas avancadas: Programa AHTS-Advanced Hydropower Turbine System

    Energy Technology Data Exchange (ETDEWEB)

    Macorin, Adriano De Figueiredo; Tomisawa, Alessandra Terumi; Van Deursen, Gustavo Jose Ferreira; Bermann, Celio [Universidade de Sao Paulo (USP), SP (Brazil)], email: brunosilva@usp.br

    2010-07-01

    Due to a privileged hydrography and energy policies that remounts to the beginning of the 20th century, Brazilian's electrical grid can be considered one of the cleanest in the world regarding the emission of atmospheric pollutants. Nevertheless, as in every human large enterprise, it is well known that hydroelectric power plants also lead to harmful environmental impacts. This article presents the AHTS Program (Advanced Hydropower Turbine System) started in 1994 in USA and developed to assess and conceive new hydro turbines to mitigate two of the main negative impacts of the installation and operation of this kind of power plant: (a) turbine-passed fish mortality and (b) the low dissolved oxygen - DO - levels downstream of the dams. The criteria used to concept the turbines are also justified in this article. As well as the modifications made in each case by the following companies: Alden Research Lab e o Northern Research and Engineering Corporation (ARL/NREC) and Voith Hydro (Voith). (author)

  20. Solving an aggregate production planning problem by using multi-objective genetic algorithm (MOGA approach

    Directory of Open Access Journals (Sweden)

    Ripon Kumar Chakrabortty

    2013-01-01

    Full Text Available In hierarchical production planning system, Aggregate Production Planning (APP falls between the broad decisions of long-range planning and the highly specific and detailed short-range planning decisions. This study develops an interactive Multi-Objective Genetic Algorithm (MOGA approach for solving the multi-product, multi-period aggregate production planning (APP with forecasted demand, related operating costs, and capacity. The proposed approach attempts to minimize total costs with reference to inventory levels, labor levels, overtime, subcontracting and backordering levels, and labor, machine and warehouse capacity. Here several genetic algorithm parameters are considered for solving NP-hard problem (APP problem and their relative comparisons are focused to choose the most auspicious combination for solving multiple objective problems. An industrial case demonstrates the feasibility of applying the proposed approach to real APP decision problems. Consequently, the proposed MOGA approach yields an efficient APP compromise solution for large-scale problems.

  1. 78 FR 20176 - Credit for Renewable Electricity Production, Refined Coal Production, and Indian Coal Production...

    Science.gov (United States)

    2013-04-03

    ... facilities, landfill gas facilities, trash combustion facilities, qualified hydropower facilities, and marine... Internal Revenue Service Credit for Renewable Electricity Production, Refined Coal Production, and Indian Coal Production, and Publication of Inflation Adjustment Factors and Reference Prices for Calendar Year...

  2. Cyber-physical production systems combined with logistic models - a learning factory concept for an improved production planning and control

    OpenAIRE

    Seitz, Kai-Frederic; Nyhuis, Peter

    2015-01-01

    Nowadays, production enterprises are faced with an array of challenges including increasing pressure regarding costs, demands for individualized products as well as the growing significance of logistic performance and costs, to name just a few. These in turn give rise to special requirements that the production planning, control and monitoring, among others, need to meet with suitable methods and techniques. Within this context, developments such as Industry 4.0 and cyber-physical production ...

  3. PROSPECTIVE ACTION PLAN FOR DEVELOPING PRODUCT CONTAINING MICROENCAPSULATED PROBIOTICS

    OpenAIRE

    Saikh Mahammed Athar Alli

    2013-01-01

    Probiotic micro-organisms explored for delivering associated proclaimed valuable benefits and its market is expanding in diverse sphere. Probiotics (PRs) are presented as pharmaceutical, dairy, non-dairy, and personal care products. To improve performances and marketplace survival of these products, diverse methods and technology devised. Amongst them microencapsulation (MEC) is widely explored to get product with wished and improved performances. Interest evoke for marketing of product conta...

  4. Optimisation of small-scale hydropower using quality assurance methods - Preliminary project; Vorprojekt: Optimierung von Kleinwasserkraftwerken durch Qualitaetssicherung. Programm Kleinwasserkraftwerke

    Energy Technology Data Exchange (ETDEWEB)

    Hofer, S.; Staubli, T.

    2006-11-15

    This comprehensive final report for the Swiss Federal Office of Energy (SFOE) presents the results of a preliminary project that examined how quality assurance methods can be used in the optimisation of small-scale hydropower projects. The aim of the project, to use existing know-how, experience and synergies, is examined. Discrepancies in quality and their effects on production prices were determined in interviews. The paper describes best-practice guidelines for the quality assurance of small-scale hydro schemes. A flow chart describes the various steps that have to be taken in the project and realisation work. Information collected from planners and from interviews made with them are presented along with further information obtained from literature. The results of interviews concerning planning work, putting to tender and the construction stages of these hydro schemes are presented and commented on. Similarly, the operational phase of such power plant is also examined, including questions on operation and guarantees. The aims of the follow-up main project - the definition of a tool and guidelines for ensuring quality - are briefly reviewed.

  5. Metaheuristic Approaches for Hydropower System Scheduling

    Directory of Open Access Journals (Sweden)

    Ieda G. Hidalgo

    2015-01-01

    Full Text Available This paper deals with the short-term scheduling problem of hydropower systems. The objective is to meet the daily energy demand in an economic and safe way. The individuality of the generating units and the nonlinearity of their efficiency curves are taken into account. The mathematical model is formulated as a dynamic, mixed integer, nonlinear, nonconvex, combinatorial, and multiobjective optimization problem. We propose two solution methods using metaheuristic approaches. They combine Genetic Algorithm with Strength Pareto Evolutionary Algorithm and Ant Colony Optimization. Both approaches are divided into two phases. In the first one, to maximize the plant’s net generation, the problem is solved for each hour of the day (static dispatch. In the second phase, to minimize the units’ switching on-off, the day is considered as a whole (dynamic dispatch. The proposed methodology is applied to two Brazilian hydroelectric plants, in cascade, that belong to the national interconnected system. The nondominated solutions from both approaches are presented. All of them meet demand respecting the physical, electrical, and hydraulic constraints.

  6. Simulation-optimization model for production planning in the blood supply chain.

    Science.gov (United States)

    Osorio, Andres F; Brailsford, Sally C; Smith, Honora K; Forero-Matiz, Sonia P; Camacho-Rodríguez, Bernardo A

    2017-12-01

    Production planning in the blood supply chain is a challenging task. Many complex factors such as uncertain supply and demand, blood group proportions, shelf life constraints and different collection and production methods have to be taken into account, and thus advanced methodologies are required for decision making. This paper presents an integrated simulation-optimization model to support both strategic and operational decisions in production planning. Discrete-event simulation is used to represent the flows through the supply chain, incorporating collection, production, storing and distribution. On the other hand, an integer linear optimization model running over a rolling planning horizon is used to support daily decisions, such as the required number of donors, collection methods and production planning. This approach is evaluated using real data from a blood center in Colombia. The results show that, using the proposed model, key indicators such as shortages, outdated units, donors required and cost are improved.

  7. A stream-scale model to optimize the water allocation for Small Hydropower Plants and the application to traditional systems

    Science.gov (United States)

    Razurel, Pierre; Niayifar, Amin; Perona, Paolo

    2017-04-01

    Hydropower plays an important role in supplying worldwide energy demand where it contributes to approximately 16% of global electricity production. Although hydropower, as an emission-free renewable energy, is a reliable source of energy to mitigate climate change, its development will increase river exploitation. The environmental impacts associated with both small hydropower plants (SHP) and traditional dammed systems have been found to the consequence of changing natural flow regime with other release policies, e.g. the minimal flow. Nowadays, in some countries, proportional allocation rules are also applied aiming to mimic the natural flow variability. For example, these dynamic rules are part of the environmental guidance in the United Kingdom and constitute an improvement in comparison to static rules. In a context in which the full hydropower potential might be reached in a close future, a solution to optimize the water allocation seems essential. In this work, we present a model that enables to simulate a wide range of water allocation rules (static and dynamic) for a specific hydropower plant and to evaluate their associated economic and ecological benefits. It is developed in the form of a graphical user interface (GUI) where, depending on the specific type of hydropower plant (i.e., SHP or traditional dammed system), the user is able to specify the different characteristics (e.g., hydrological data and turbine characteristics) of the studied system. As an alternative to commonly used policies, a new class of dynamic allocation functions (non-proportional repartition rules) is introduced (e.g., Razurel et al., 2016). The efficiency plot resulting from the simulations shows the environmental indicator and the energy produced for each allocation policies. The optimal water distribution rules can be identified on the Pareto's frontier, which is obtained by stochastic optimization in the case of storage systems (e.g., Niayifar and Perona, submitted) and by

  8. Production and Distribution Planning in District Heating Systems; Produktions- och distributionsplanering av fjaerrvaerme

    Energy Technology Data Exchange (ETDEWEB)

    Kvarnstroem, Johan; Dotzauer, Erik; Dahlquist, Erik

    2006-12-15

    To produce heat and power is costly. Therefore it is important for the district heating companies to plan and optimize the production. The aim with the present project is to find out how also the distribution of heat can be considered in the planning. The principal procedure is to first construct a prediction of the heat demand, and then, given the demand prediction, construct the production plan. Due to the complexity of the problem, the need for mathematical models is obvious. The report gives a survey introduction to production planning in district heating systems and presents a model for the purpose. The model is developed for one of the district heating systems in Stockholm owned by the energy company Fortum. Traditionally, models for production planning do not consider the distribution network. In such models, usually the methodology Mixed Integer Programming (MIP) is used. The report suggests how the distribution network can be modeled as a MIP; it shall be possible to link the network model to existing software that models the production plants as MIP. The model is developed in the programming language GAMS. Analysis and results are presented. The results show that the suggested plans vary depending on if the distribution network is considered or not. The report also suggests how a simple sensitivity analysis of the production plans can be performed. This is necessary since there are always uncertainties associated with weather- and load predictions.

  9. Coeur d'Alene Tribe Fish, Water and Wildlife Program : Coeur d'Alene Tribe Trout Production Facility Master Plan.

    Energy Technology Data Exchange (ETDEWEB)

    Peters, Ronald L.; Woodward-Lilengreen, Kelly L.; Vitale, Angelo J.

    1999-09-01

    The Northwest Power Planning Council (Council) receives and reviews proposals to mitigate for fish and wildlife losses and refers approved measures to Bonneville Power Administration (BPA) for funding. The Northwest Power Act (Act) calls on the Council to include measures in its Columbia River Basin Fish and Wildlife Program (Program) to address system-wide fish and wildlife losses. The Act further states that the Council may include in its Program measures that provide off-site mitigation--mitigation physically removed from the hydro project(s) that caused the need to mitigate. The Program includes a goal ''to recover and preserve the health of native resident fish injured by the hydropower system, where feasible, and, where appropriate, to use resident fish to mitigate for anadromous fish losses in the system.'' Among those recommended measures are off-site mitigation for losses of anadromous fisheries including the measure under analysis in this Coeur d'Alene Tribe Trout Production Facility Master Plan, proposed by the Coeur d'Alene Tribe. To meet the need for off-site mitigation for anadromous fish losses in the Columbia River Basin in a manner consistent with the objectives of the Council's Fish and Wildlife Program, the Coeur d'Alene Tribe is proposing that the BPA fund the design, construction, operations and maintenance of a trout production facility on the Coeur d'Alene Indian Reservation. Measures for establishing a Coeur d'Alene fish production facility have been a part of the Council's Program since 1987. The Coeur d'Alene Tribe Trout Production Facility is intended to rear and release westslope cutthroat trout into rivers and streams with the express purpose of increasing the numbers of fish spawning, incubating and rearing in the natural environment. It will use the modern technology that hatcheries offer to overcome the mortality resulting from habitat degradation in lakes, rivers, and

  10. Small hydropower for rural electrification in South Africa - using experiences from other African countries

    CSIR Research Space (South Africa)

    Jonker Klunne, WE

    2009-10-01

    Full Text Available Local hydropower sources can play an important role in the electrification of rural areas in South Africa remote from the national electricity grid. To ensure the sustainability of hydropower developments it is essential that lessons learned...

  11. Multi-model assessment of global hydropower and cooling water discharge potential under climate change

    NARCIS (Netherlands)

    van Vliet, M. T H; van Beek, L. P H; Eisner, S.; Flörke, M.; Wada, Y.; Bierkens, M. F P

    2016-01-01

    Worldwide, 98% of total electricity is currently produced by thermoelectric power and hydropower. Climate change is expected to directly impact electricity supply, in terms of both water availability for hydropower generation and cooling water usage for thermoelectric power. Improved understanding

  12. Mine/Mill production planning based on a Geometallurgical Model

    OpenAIRE

    Gomes, Reinaldo Brandao; Tomi,Giorgio de; Assis, Paulo S

    2016-01-01

    Abstract The Pau Branco mine supplies two blast furnaces with iron ore lumps, and currently, charcoal consumption for pig iron production accounts for 47% of the blast furnaces' operational cost. A geometallurgical model is presented to support an economic study considering reserve volumes, product quality, and operational costs based on the metallurgical performance of different iron ore typologies. Sample analysis provides values required in the model. From the model, an alternative product...

  13. Integrated production-distribution planning optimization models: A review in collaborative networks context

    OpenAIRE

    Beatriz Andres; Raquel Sanchis; Jaques Lamothe; Leila Saari; Frederic Hauser

    2017-01-01

    Researchers in the area of collaborative networks are more and more aware of proposing collaborative approaches to address planning processes, due to the advantages associated when enterprises perform integrated planning models. Collaborative production-distribution planning, among the supply network actors, is considered a proper mechanism to support enterprises on dealing with uncertainties and dynamicity associated to the current markets. Enterprises, and especially SMEs, should be able to...

  14. Plan now to make your retirement active, productive.

    Science.gov (United States)

    Schlepp, S

    1989-12-01

    In his book Planning to the Years Ahead, Lester I. Tenney, PhD, professor emeritus at Arizona State University, Tempe, links Abraham Maslow's hierarchy of needs to retirement planning. According to Maslow, economic and security needs can be achieved through a family environment (eg, food clothing, shelter), and social acceptance, self-worth, and self-satisfaction can be achieved from social interaction, work, or leisure activities. After the basic needs of food, clothing, and shelter have been achieved, people are able to move to the next level of achieving safety and security. The level of dependency that people have on satisfying these needs through work will determine how well they are at adapting to retirement. The more people depend on work alone, the harder will be the adjustment; people who are less dependent on work will find retirement easier to accept.

  15. Cooperative optimization of reconfigurable machine tool configurations and production process plan

    Science.gov (United States)

    Xie, Nan; Li, Aiping; Xue, Wei

    2012-09-01

    The production process plan design and configurations of reconfigurable machine tool (RMT) interact with each other. Reasonable process plans with suitable configurations of RMT help to improve product quality and reduce production cost. Therefore, a cooperative strategy is needed to concurrently solve the above issue. In this paper, the cooperative optimization model for RMT configurations and production process plan is presented. Its objectives take into account both impacts of process and configuration. Moreover, a novel genetic algorithm is also developed to provide optimal or near-optimal solutions: firstly, its chromosome is redesigned which is composed of three parts, operations, process plan and configurations of RMTs, respectively; secondly, its new selection, crossover and mutation operators are also developed to deal with the process constraints from operation processes (OP) graph, otherwise these operators could generate illegal solutions violating the limits; eventually the optimal configurations for RMT under optimal process plan design can be obtained. At last, a manufacturing line case is applied which is composed of three RMTs. It is shown from the case that the optimal process plan and configurations of RMT are concurrently obtained, and the production cost decreases 6.28% and nonmonetary performance increases 22%. The proposed method can figure out both RMT configurations and production process, improve production capacity, functions and equipment utilization for RMT.

  16. Global Production Planning Process considering the Supply Risk of Overseas Manufacturing Sites

    Directory of Open Access Journals (Sweden)

    Hosang Jung

    2015-01-01

    Full Text Available Although global manufacturers can produce most of their final products in local plants, they need to source components or parts from desirable overseas manufacturing partners at low cost in order to fulfill customer orders. In this global manufacturing environment, capacity information for planning is usually imprecise owing to the various risks of overseas plants (e.g., foreign governments’ policies and labor stability. It is therefore not easy for decision-makers to generate a global production plan showing the production amounts at local plants and overseas manufacturing facilities operated by manufacturing partners. In this paper, we present a new global production planning process considering the supply risk of overseas manufacturing sites. First, local experts estimate the supply capacity of an overseas plant using their judgment to determine when the risk could occur and how large the risk impact would be. Next, we run a global production planning model with the estimated supply capacities. The proposed process systematically adopts the qualitative judgments of local experts in the global production planning process and thus can provide companies with a realistic global production plan. We demonstrate the applicability of the proposed process with a real world case.

  17. Factors hindering the development of small-scale municipal hydropower: a case study of the Black River project in Springfield, Vermont

    Energy Technology Data Exchange (ETDEWEB)

    Peters, E.; Berger, G.; Amlin, J.; Meadows, D.

    1979-03-01

    There are many good reasons to use New England's small-scale hydropower resources to generate electricity. But current production capacity in the three northern states is only 1300 MW, just 35% of the 3710 MW estimated to be available to the states. Though the benefits of properly designed projects seem substantial, many factors combine to hinder their development. The Black River project in Springfield, Vermont, exemplifies the problem. Even after the two has invested over five years and $1 million in its effort to develop 30 MW of capacity, it still has not received either federal or state approval to proceed with construction. The first 4 years of the Springfield experience are described and factors that have greatly increased the cost and planning time for the project are identified. The purpose is to identify changes that could facilitate efforts to develop small-scale hydropower at other acceptable sites. On the basis of this experience it is recommended that: after issuance of a FERC permit, a preliminary determination of the project's impacts should be made by FERC officials; if environmental impacts are solely local or limited, environmental analysis/determination should be placed in the hands of the state; short-form licensing should be used for all run-of-river hydro projects that utilize and do not significantly modify existing water impoundment areas and do not significantly alter downstream flow patterns; and a hydro ombudsman with power at the state level should be established to facilitate governmental inter-agency coordination and project-related information transfer: one-stop licensing. (LCL)

  18. Integrated production-distribution planning optimization models: A review in collaborative networks context

    Directory of Open Access Journals (Sweden)

    Beatriz Andres

    2017-01-01

    Full Text Available Researchers in the area of collaborative networks are more and more aware of proposing collaborative approaches to address planning processes, due to the advantages associated when enterprises perform integrated planning models. Collaborative production-distribution planning, among the supply network actors, is considered a proper mechanism to support enterprises on dealing with uncertainties and dynamicity associated to the current markets. Enterprises, and especially SMEs, should be able to overcome the continuous changes of the market by increasing their agility. Carrying out collaborative planning allows enterprises to enhance their readiness and agility for facing the market turbulences. However, SMEs have limited access when incorporating optimization tools to deal with collaborative planning, reducing their ability to respond to the competition. The problem to solve is to provide SMEs affordable solutions to support collaborative planning. In this regard, new optimisation algorithms are required in order to improve the collaboration within the supply network partners. As part of the H2020 Cloud Collaborative Manufacturing Networks (C2NET research project, this paper presents a study on integrated production and distribution plans. The main objective of the research is to identify gaps in current optimization models, proposed to address integrated planning, taking into account the requirements and needs of the industry. Thus, the needs of the companies belonging to the industrial pilots, defined in the C2NET project, are identified; analysing how these needs are covered by the optimization models proposed in the literature, to deal with the integrated production-distribution planning.

  19. Non-timber forest products and forest stewardship plans

    Science.gov (United States)

    Becky Barlow; Tanner Filyaw; Sarah W. Workman

    2015-01-01

    To many woodland owners “harvesting” typically means the removal of timber from forests. In recent years many landowners have become aware of the role non-timber forest products (NTFPs) can play in supplemental management strategies to produce income while preserving other forest qualities. NTFPs are a diverse group of craft, culinary, and medicinal products that have...

  20. Planning the production of a fleet of domestic combined heat and power generators

    NARCIS (Netherlands)

    Bosman, M.G.C.; Bakker, Vincent; Molderink, Albert; Hurink, Johann L.; Smit, Gerardus Johannes Maria

    2012-01-01

    This paper describes a planning problem, arising in the energy supply chain, that deals with the planning of the production runs of micro combined heat and power (microCHP) appliances installed in houses, cooperating in a fleet. Two types of this problem are described. The first one is the Single

  1. Learning Outcomes in Vocational Education: A Business Plan Development by Production-Based Learning Model Approach

    Science.gov (United States)

    Kusumaningrum, Indrati; Hidayat, Hendra; Ganefri; Anori, Sartika; Dewy, Mega Silfia

    2016-01-01

    This article describes the development of a business plan by using production-based learning approach. In addition, this development also aims to maximize learning outcomes in vocational education. Preliminary analysis of curriculum and learning and the needs of the market and society become the basic for business plan development. To produce a…

  2. Sunkhaze Meadows National Wildlife Refuge and Carlton Pond Waterfowl Production Area: Comprehensive Conservation Plan

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This Comprehensive Conservation Plan (CCP) was written to guide management on Sunkhaze Meadows National Wildlife Refuge and Carlton Pond Waterfowl Production Area...

  3. Seasonal Predator Management Plan to Increase Suck Production on Horicon NWR

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Horicon National Wildlife Refuge was directed by the 1985 Annual Work Plan Advice to increase mallard and redhead production on the refuge. The limiting factor on...

  4. Quantifying the Value of Hydropower in the Electric Grid. Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Key, T. [Energy Efficiency and Renewable Energy (EERE), Washington, DC (United States)

    2013-02-01

    The report summarizes a 3-year DOE study focused on defining value of hydropower assets in a changing electric grid. The study looked at existing large hydropower operations in the U.S., models for different electricity futures, markets, costs of existing and new technologies as well as trends related to hydropower investments in other parts of the world.

  5. Small hydropower in Southern Africa – an overview of five countries in the region

    NARCIS (Netherlands)

    Jonker Klunne, Wim

    2013-01-01

    This paper looks at the status of small hydropower in Lesotho, Mozambique, South Africa, Swaziland and Zimbabwe. For each country, an overview will be given of the electricity sector and the role of hydropower, the potential for small hydropower and the expected future of this technology. Small

  6. 18 CFR 141.14 - Form No. 80, Licensed Hydropower Development Recreation Report.

    Science.gov (United States)

    2010-04-01

    ... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Form No. 80, Licensed Hydropower Development Recreation Report. 141.14 Section 141.14 Conservation of Power and Water Resources... Hydropower Development Recreation Report. The form of the report, Licensed Hydropower Development Recreation...

  7. State Models to Incentivize and Streamline Small Hydropower Development

    Energy Technology Data Exchange (ETDEWEB)

    Curtis, Taylor [National Renewable Energy Lab. (NREL), Golden, CO (United States); Levine, Aaron [National Renewable Energy Lab. (NREL), Golden, CO (United States); Johnson, Kurt [National Renewable Energy Lab. (NREL), Golden, CO (United States)

    2017-10-31

    In 2016, the hydropower fleet in the United States produced more than 6 percent (approximately 265,829 gigawatt-hours [GWh]) of the total net electricity generation. The median-size hydroelectric facility in the United States is 1.6 MW and 75 percent of total facilities have a nameplate capacity of 10 MW or less. Moreover, the U.S. Department of Energy's Hydropower Vision study identified approximately 79 GW hydroelectric potential beyond what is already developed. Much of the potential identified is at low-impact new stream-reaches, existing conduits, and non-powered dams with a median project size of 10 MW or less. To optimize the potential and value of small hydropower development, state governments are crafting policies that provide financial assistance and expedite state and federal review processes for small hydroelectric projects. This report analyzes state-led initiatives and programs that incentivize and streamline small hydroelectric development.

  8. Regulatory Approaches for Adding Capacity to Existing Hydropower Facilities

    Energy Technology Data Exchange (ETDEWEB)

    Levine, Aaron L. [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Curtis, Taylor L. [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Kazerooni, Borna [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-10-24

    In 2015, hydroelectric generation accounted for more than 6 percent of total net electricity generation in the United States and 46 percent of electricity generation from all renewables. The United States has considerable hydroelectric potential beyond what is already being developed. Nearly 7 GW of this potential is found by adding capacity to existing hydropower facilities. To optimize the value of hydroelectric generation, the U.S. Department of Energy's Hydropower Vision Study highlights the importance of adding capacity to existing facilities. This report provides strategic approaches and considerations for Federal Energy Regulatory Commission licensed and exempt hydropower facilities seeking to increase generation capacity, which may include increases from efficiency upgrades. The regulatory approaches reviewed for this report include capacity and non-capacity amendments, adding capacity during relicensing, and adding capacity when converting a license to a 10-MW exemption.

  9. Exemplary Design Envelope Specification for Standard Modular Hydropower Technology

    Energy Technology Data Exchange (ETDEWEB)

    Witt, Adam M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Smith, Brennan T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Tsakiris, Achilleas [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Papanicolaou, Thanos [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Pries, Jason L. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Burress, Timothy A. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Stewart, Kevin M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lee, Kyutae [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); DeNeale, Scott T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Bevelhimer, Mark S. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Pracheil, Brenda M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); McManamay, Ryan A. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Ekici, Kivanc [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Kutz, Benjamin [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Curd, Shelaine L. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Bishop, Norm [Knight Piesold, Denver, CO (United States); Welch, Tim [U.S. Department of Energy (DOE), Washington, DC (United States). Office of Energy Efficiency and Renewable Energy (EERE); Rabon, Daniel [U.S. Department of Energy (DOE), Washington, DC (United States). Office of Energy Efficiency and Renewable Energy (EERE); Fernandez, Alisha [McKeown and Associates, Moberly, MO (United States)

    2017-02-01

    Hydropower is an established, affordable renewable energy generation technology supplying nearly 18% of the electricity consumed globally. A hydropower facility interacts continuously with the surrounding water resource environment, causing alterations of varying magnitude in the natural flow of water, energy, fish, sediment, and recreation upstream and downstream. A universal challenge in facility design is balancing the extraction of useful energy and power system services from a stream with the need to maintain ecosystem processes and natural environmental function. On one hand, hydroelectric power is a carbon-free, renewable, and flexible asset to the power system. On the other, the disruption of longitudinal connectivity and the artificial barrier to aquatic movement created by hydraulic structures can produce negative impacts that stress fresh water environments. The growing need for carbon-free, reliable, efficient distributed energy sources suggests there is significant potential for hydropower projects that can deploy with low installed costs, enhanced ecosystem service offerings, and minimal disruptions of the stream environment.

  10. Simulation and Modeling Capability for Standard Modular Hydropower Technology

    Energy Technology Data Exchange (ETDEWEB)

    Stewart, Kevin M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Smith, Brennan T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Witt, Adam M. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); DeNeale, Scott T. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Bevelhimer, Mark S. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Pries, Jason L. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Burress, Timothy A. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Kao, Shih-Chieh [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Mobley, Miles H. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lee, Kyutae [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Curd, Shelaine L. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Tsakiris, Achilleas [Univ. of Tennessee, Knoxville, TN (United States); Mooneyham, Christian [Univ. of Tennessee, Knoxville, TN (United States); Papanicolaou, Thanos [Univ. of Tennessee, Knoxville, TN (United States); Ekici, Kivanc [Univ. of Tennessee, Knoxville, TN (United States); Whisenant, Matthew J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Welch, Tim [US Department of Energy, Washington, DC (United States); Rabon, Daniel [US Department of Energy, Washington, DC (United States)

    2017-08-01

    Grounded in the stakeholder-validated framework established in Oak Ridge National Laboratory’s SMH Exemplary Design Envelope Specification, this report on Simulation and Modeling Capability for Standard Modular Hydropower (SMH) Technology provides insight into the concepts, use cases, needs, gaps, and challenges associated with modeling and simulating SMH technologies. The SMH concept envisions a network of generation, passage, and foundation modules that achieve environmentally compatible, cost-optimized hydropower using standardization and modularity. The development of standardized modeling approaches and simulation techniques for SMH (as described in this report) will pave the way for reliable, cost-effective methods for technology evaluation, optimization, and verification.

  11. DOE Hydropower Program Annual Report for FY 2004

    Energy Technology Data Exchange (ETDEWEB)

    Sommers, Garold L. [Idaho National Lab. (INL), Idaho Falls, ID (United States); Hunt, Richard T. [Idaho National Lab. (INL), Idaho Falls, ID (United States); Cada, Glenn F. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Sale, Michael J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Dauble, Dennis D. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Carlson, Thomas [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Ahlgrimm, James [U.S. Dept. of Energy, Washington, D.C. (United States); Acker, Tomas L. [National Renewable Energy Lab. (NREL), Golden, CO (United States)

    2005-02-01

    This report describes the progress of the R&D conducted in FY 2004 the under four program areas at the time: (1) Advanced Hydropower Technology (Large Turbine Field Testing, Water Use Optimization, and Improved Mitigation Practices); (2) Supporting Research and Testing (Environmental Performance Testing Methods, Computational and Physical Modeling, Instrumentation and Controls, and Environmental Analysis); (3) Systems Integration and Technology Acceptance (Hydro/Wind Integration, National Hydropower Collaborative, and Integration and Communications); and (4) Supporting Engineering and Analysis (Valuation Methods and Assessments and Characterization of Innovative Technology).

  12. DOE Hydropower Program Biennial Report for FY 2005-2006

    Energy Technology Data Exchange (ETDEWEB)

    Sale, Michael J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Cada, Glenn F. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Acker, Thomas L. [National Renewable Energy Lab. (NREL), Golden, CO (United States); Northern Arizona State Univ., Flagstaff, AZ (United States); Carlson, Thomas [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Dauble, Dennis D. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Hall, Douglas G. [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2006-07-01

    This report describes the progress of the R&D conducted in FY 2005-2006 the under four program areas at the time: (1) Advanced Hydropower Technology (Large Turbine Field Testing, Water Use Optimization, and Improved Mitigation Practices); (2) Supporting Research and Testing (Environmental Performance Testing Methods, Computational and Physical Modeling, Instrumentation and Controls, and Environmental Analysis); (3) Systems Integration and Technology Acceptance (Hydro/Wind Integration, National Hydropower Collaborative, and Integration and Communications); and (4) Supporting Engineering and Analysis (Valuation Methods and Assessments and Characterization of Innovative Technology).

  13. Loss of European silver eel passing a hydropower station

    DEFF Research Database (Denmark)

    Pedersen, Michael Ingemann; Jepsen, Niels; Aarestrup, Kim

    2012-01-01

    The aim of this study was to assess escapement success of silver eels, Anguilla anguilla (L.), in a lowland river while passing a reservoir and a hydropower station. It was hypothesized that passage success would be lowest at the hydropower station and that survival and migration speed would...... be highest in the free-flowing river section upstream the reservoir. Forty-five female silver eels 56–86 cm in length were tagged with acoustic transmitters and released in November 2006. Their migration was monitored via automatic listening stations (ALS) in various sections of the river, covering a total...

  14. Memorandum of Understanding for Hydropower Two-Year Progress Report

    Energy Technology Data Exchange (ETDEWEB)

    None

    2012-04-01

    On March 24, 2010, the Department of the Army (DOA) through the U.S. Army Corps of Engineers (USACE or Corps), the Department of Energy, and the Department of the Interior signed the Memorandum of Understanding (MOU) for Hydropower. The purpose of the MOU is to “help meet the nation’s needs for reliable, affordable, and environmentally sustainable hydropower by building a long-term working relationship, prioritizing similar goals, and aligning ongoing and future renewable energy development efforts.” This report documents efforts so far.

  15. A Multiobjective Stochastic Production-Distribution Planning Problem in an Uncertain Environment Considering Risk and Workers Productivity

    Directory of Open Access Journals (Sweden)

    S. M. J. Mirzapour Al-e-Hashem

    2011-01-01

    Full Text Available A multi-objective two stage stochastic programming model is proposed to deal with a multi-period multi-product multi-site production-distribution planning problem for a midterm planning horizon. The presented model involves majority of supply chain cost parameters such as transportation cost, inventory holding cost, shortage cost, production cost. Moreover some respects as lead time, outsourcing, employment, dismissal, workers productivity and training are considered. Due to the uncertain nature of the supply chain, it is assumed that cost parameters and demand fluctuations are random variables and follow from a pre-defined probability distribution. To develop a robust stochastic model, an additional objective functions is added to the traditional production-distribution-planning problem. So, our multi-objective model includes (i the minimization of the expected total cost of supply chain, (ii the minimization of the variance of the total cost of supply chain and (iii the maximization of the workers productivity through training courses that could be held during the planning horizon. Then, the proposed model is solved applying a hybrid algorithm that is a combination of Monte Carlo sampling method, modified -constraint method and L-shaped method. Finally, a numerical example is solved to demonstrate the validity of the model as well as the efficiency of the hybrid algorithm.

  16. An integrated multi−period planning of the production and transportation of multiple petroleum products in a single pipeline system

    Directory of Open Access Journals (Sweden)

    Alberto Herrán

    2011-01-01

    Full Text Available A multiproduct pipeline provides an economic way to transport large volumes of refined petroleum products over long distances. In such a pipeline, different products are pumped back−to−back without any separation device between them. The sequence and lengths of such pumping runs must be carefully selected in order to meet market demands while minimizing pipeline operational costs and satisfying several constraints. The production planning and scheduling of the products at the refinery must also be synchronized with the transportation in order to avoid the usage of the system at some peak−hour time intervals. In this paper, we propose a multi−period mixed integer nonlinear programming (MINLP model for an optimal planning and scheduling of the production and transportation of multiple petroleum products from a refinery plant connected to several depots through a single pipeline system. The objective of this work is to generalize the mixed integer linear programming (MILP formulation proposed by Cafaro and Cerdá (2004, Computers and Chemical Engineering where only a single planning period was considered and the production planning and scheduling was not part of the decision process. Numerical examples show how the use of a single period model for a given time period may lead to infeasible solutions when it is used for the upcoming periods. These examples also show how integrating production planning with the transportation and the use of a multi−period model may result in a cost saving compared to using a single−period model for each period, independently.

  17. SMALL HYDRO PLANTS IN LAND USE SYSTEM PLANNING IN POLAND

    Directory of Open Access Journals (Sweden)

    Anita Bernatek

    2014-10-01

    Full Text Available Small hydropower plants are present in the land use system planning in Poland. At the national level the important role of spatial planning in the development of renewable energy was highlighted, included small hydroplants. However, it seems that at the regional level this demand has not been realized. The necessity of developing small hydroplants as a renewable energy was highlighted, but negative environmental impact was not indicated. At local level legal instrument of small hydropower plants is specified.

  18. Characterizing effects of hydropower plants on sub-daily flow regimes

    Science.gov (United States)

    Bejarano, María Dolores; Sordo-Ward, Álvaro; Alonso, Carlos; Nilsson, Christer

    2017-07-01

    A characterization of short-term changes in river flow is essential for understanding the ecological effects of hydropower plants, which operate by turning the turbines on or off to generate electricity following variations in the market demand (i.e., hydropeaking). The goal of our study was to develop an approach for characterizing the effects of hydropower plant operations on within-day flow regimes across multiple dams and rivers. For this aim we first defined ecologically meaningful metrics that provide a full representation of the flow regime at short time scales from free-flowing rivers and rivers exposed to hydropeaking. We then defined metrics that enable quantification of the deviation of the altered short-term flow regime variables from those of the unaltered state. The approach was successfully tested in two rivers in northern Sweden, one free-flowing and another regulated by cascades of hydropower plants, which were additionally classified based on their impact on short-term flows in sites of similar management. The largest differences between study sites corresponded to metrics describing sub-daily flow magnitudes such as amplitude (i.e., difference between the highest and the lowest hourly flows) and rates (i.e., rise and fall rates of hourly flows). They were closely followed by frequency-related metrics accounting for the numbers of within-day hourly flow patterns (i.e., rises, falls and periods of stability of hourly flows). In comparison, between-site differences for the duration-related metrics were smallest. In general, hydropeaking resulted in higher within-day flow amplitudes and rates and more but shorter periods of a similar hourly flow patterns per day. The impacted flow feature and the characteristics of the impact (i.e., intensity and whether the impact increases or decreases whatever is being described by the metric) varied with season. Our approach is useful for catchment management planning, defining environmental flow targets

  19. 76 FR 21947 - Credit for Renewable Electricity Production, Refined Coal Production, and Indian Coal Production...

    Science.gov (United States)

    2011-04-19

    ..., small irrigation power facilities, landfill gas facilities, trash combustion facilities, and qualified..., landfill gas facilities, trash combustion facilities, qualified hydropower facilities, marine and... Internal Revenue Service Credit for Renewable Electricity Production, Refined Coal Production, and Indian...

  20. 77 FR 21835 - Credit for Renewable Electricity Production, Refined Coal Production, and Indian Coal Production...

    Science.gov (United States)

    2012-04-11

    ...-loop biomass facilities, small irrigation power facilities, landfill gas facilities, trash combustion... irrigation power facilities, landfill gas facilities, trash combustion facilities, qualified hydropower... Internal Revenue Service Credit for Renewable Electricity Production, Refined Coal Production, and Indian...

  1. 75 FR 16576 - Credit for Renewable Electricity Production, Refined Coal Production, and Indian Coal Production...

    Science.gov (United States)

    2010-04-01

    ..., small irrigation power facilities, landfill gas facilities, trash combustion facilities, and qualified..., landfill gas facilities, trash combustion facilities, qualified hydropower facilities, marine and... Internal Revenue Service Credit for Renewable Electricity Production, Refined Coal Production, and Indian...

  2. International marketing for forest products industries workshop planned for October

    OpenAIRE

    Davis, Lynn

    2009-01-01

    Virginia Tech's College of Natural Resources and Virginia Cooperative Extension will hold a workshop on International Marketing for Forest Products Industries on Oct. 20, at the U.S. Department of Agriculture (USDA) Forest Service Wood Education and Resource Center in Princeton, W.Va.

  3. System Development of Estimated Figures of Volume Production Plan

    Science.gov (United States)

    Brazhnikov, Maksim A.; Khorina, Irina V.; Minina, Yulia I.; Kolyasnikova, Lyudmila V.; Streltsov, Aleksey V.

    2016-01-01

    The relevance of this problem is primarily determined by a necessity of improving production efficiency in conditions of innovative development of the economy and implementation of Import Substitution Program. The purpose of the article is development of set of criteria and procedures for the comparative assessment of alternative volume production…

  4. 49 CFR 236.907 - Product Safety Plan (PSP).

    Science.gov (United States)

    2010-10-01

    ... description of the safety assessment and verification and validation processes applied to the product and the... require verification and validation to the extent the changes involve safety-critical functions. (2... using an alternative method, and a complete explanation of the manner in which those requirements are...

  5. Tactical Production and Lot Size Planning with Lifetime Constraints

    DEFF Research Database (Denmark)

    Raiconi, Andrea; Pahl, Julia; Gentili, Monica

    2017-01-01

    In this work, we face a variant of the capacitated lot sizing problem. This is a classical problem addressing the issue of aggregating lot sizes for a finite number of discrete periodic demands that need to be satisfied, thus setting up production resources and eventually creating inventories...

  6. Performance assessment of deterministic and probabilistic weather predictions for the short-term optimization of a tropical hydropower reservoir

    Science.gov (United States)

    Mainardi Fan, Fernando; Schwanenberg, Dirk; Alvarado, Rodolfo; Assis dos Reis, Alberto; Naumann, Steffi; Collischonn, Walter

    2016-04-01

    Hydropower is the most important electricity source in Brazil. During recent years, it accounted for 60% to 70% of the total electric power supply. Marginal costs of hydropower are lower than for thermal power plants, therefore, there is a strong economic motivation to maximize its share. On the other hand, hydropower depends on the availability of water, which has a natural variability. Its extremes lead to the risks of power production deficits during droughts and safety issues in the reservoir and downstream river reaches during flood events. One building block of the proper management of hydropower assets is the short-term forecast of reservoir inflows as input for an online, event-based optimization of its release strategy. While deterministic forecasts and optimization schemes are the established techniques for the short-term reservoir management, the use of probabilistic ensemble forecasts and stochastic optimization techniques receives growing attention and a number of researches have shown its benefit. The present work shows one of the first hindcasting and closed-loop control experiments for a multi-purpose hydropower reservoir in a tropical region in Brazil. The case study is the hydropower project (HPP) Três Marias, located in southeast Brazil. The HPP reservoir is operated with two main objectives: (i) hydroelectricity generation and (ii) flood control at Pirapora City located 120 km downstream of the dam. In the experiments, precipitation forecasts based on observed data, deterministic and probabilistic forecasts with 50 ensemble members of the ECMWF are used as forcing of the MGB-IPH hydrological model to generate streamflow forecasts over a period of 2 years. The online optimization depends on a deterministic and multi-stage stochastic version of a model predictive control scheme. Results for the perfect forecasts show the potential benefit of the online optimization and indicate a desired forecast lead time of 30 days. In comparison, the use of

  7. ESTIMATING HYDROPOWER POTENTIAL OF SMALL RIVERS OF REPUBLIC OF MOLDOVA USING GIS

    Directory of Open Access Journals (Sweden)

    T. CASTRAVEŢ

    2018-06-01

    Full Text Available Estimating hydropower potential of small rivers of Republic of Moldova using GIS, The increasing demand for energy, especially from renewable and sustainable sources, spurs the development of small hydropower plants and encourages investment in new survey studies (Larentis et al., 2010. Preliminary hydropower survey studies usually carry huge uncertainties about the technical, economic and environmental feasibility of the undeveloped potential. This paper presents a methodology for hydropower potential sites assessment. The sequence of procedures to identify hydropower sites is based on remote sensing data and streamflow and rainfall data and was automated within GIS environment.

  8. Construction Claim Types and Causes for a Large-Scale Hydropower Project in Bhutan

    Directory of Open Access Journals (Sweden)

    Bonaventura H.W. Hadikusumo

    2015-01-01

    Full Text Available Hydropower construction projects are complex and uncertain, have long gestational periods and involve several parties. Furthermore, they require the integration of different components (Civil, Mechanical and Electrical to work together as a single unit. These projects require highly specialised designs, detailed plans and specifications, high-risk construction methods, effective management, skilful supervision and close coordination. Thus, claims are common in such projects. These claims are undesirable because they require significant time and resources to resolve and cause adversarial relationships among the parties involved. Therefore, it is in the common interest of all involved parties to prevent, minimise, or resolve claims as amicably as possible. Identifying common claim types and their causes is essential in devising techniques to minimise and avoid them in future projects. This report details a case study performed on a large-scale hydropower project in Bhutan. The findings of this case study indicate that differing site conditions are the major contributor of impact and change claims and 95% of total claims can be settled by negotiation, whereas 5% of claims can be settled by arbitration.

  9. The influence of mechanical gear on the efficiency of small hydropower

    Science.gov (United States)

    Ferenc, Zbigniew; Sambor, Aleksandra

    2017-11-01

    Pursuant to the "Strategy of development of renewable energy", an increase in the share of renewable energy sources in the national fuel-energy balance up to 14% by 2020 is planned in the structure of usage of primary energy carriers. The change in the participation of the clean energy in the energy balance may be done not only by the erection of new and renovation of the already existing plants, but also through an improvement of their energetic efficiency. The study presents the influence of the mechanical gear used on the quantity of energy produced by a small hydropower on the basis of SHP Rzepcze in Opole province in 2005-2010. The primary kinematic system was composed of a Francis turbine of a vertical axis, a toothed intersecting axis gear of 1:1 ratio, a belt gear of a double ratio. After a modernization the system was simplified by means of reducing the intersecting axis gear and the double ratio of the belt gear. The new kinematic system utilized a single-ratio belt gear of a vertical axis. After the kinematic system was rearranged, a significant improvement of efficiency of the small hydropower was concluded, which translates into an increase of the amount of energy produced.

  10. Some Effects of integrated Production Planning in Large-scale Kitchens

    DEFF Research Database (Denmark)

    Engelund, Eva Høy; Friis, Alan; Jacobsen, Peter

    consist of as few steps as possible. When using the philosophies in Lean Manufacturing a concept obeying the above constraints can be created. The focus is turned to time and work planning in production, core competences in production and how to meet consumer demands. This means that the system is able...

  11. Some effects of integrated production planning in large-scale kitchens

    DEFF Research Database (Denmark)

    Engelund, Eva Høy; Friis, Alan; Jacobsen, Peter

    2005-01-01

    Integrated production planning in large-scale kitchens proves advantageous for increasing the overall quality of the food produced and the flexibility in terms of a diverse food supply. The aim is to increase the flexibility and the variability in the production as well as the focus on freshness ...

  12. 77 FR 35110 - Agency Information Collection Activity Under OMB Review: Production Plan Reports

    Science.gov (United States)

    2012-06-12

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION National Highway Traffic Safety Administration Agency Information Collection Activity Under OMB Review... updated future product plans, as well as production data through the recent past, including data about...

  13. Land processes distributed active archive center product lifecycle plan

    Science.gov (United States)

    Daucsavage, John C.; Bennett, Stacie D.

    2014-01-01

    The U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center and the National Aeronautics and Space Administration (NASA) Earth Science Data System Program worked together to establish, develop, and operate the Land Processes (LP) Distributed Active Archive Center (DAAC) to provide stewardship for NASA’s land processes science data. These data are critical science assets that serve the land processes science community with potential value beyond any immediate research use, and therefore need to be accounted for and properly managed throughout their lifecycle. A fundamental LP DAAC objective is to enable permanent preservation of these data and information products. The LP DAAC accomplishes this by bridging data producers and permanent archival resources while providing intermediate archive services for data and information products.

  14. Worldwide Sourcing Planning at Solutia's Glass Interlayer Products Division

    OpenAIRE

    2009-01-01

    Abstract The article describes the realization of an optimization project by a global chemical manufacturer with the objective to develop and implement a supply chain coordination tool. After a presentation of the current supply chain and the challenges faced by Solutia prior to the optimization project, we provide an overview on the mathematical model depicting the company's worldwide production network. We then provide insight into the lessons learned by both optimization team an...

  15. The Water - Energy Nexus Of Hydropower. Are The Trade-Offs Between Electricity Generation And Water Supply Negligible?

    Science.gov (United States)

    Scherer, L.; Pfister, S.

    2015-12-01

    Hydropower ranks first among renewable sources of power production and provides globally about 16% of electricity. While it is praised for its low greenhouse gas emissions, it is accused of its large water consumption which surpasses that of all conventional and most renewable energy sources (except for bioenergy) by far. Previous studies mostly applied a gross evaporation approach where all the current evaporation from the plant's reservoir is allocated to hydropower. In contrast, we only considered net evaporation as the difference between current evaporation and actual evapotranspiration before the construction of the reservoir. In addition, we take into account local water stress, its monthly fluctuations and storage effects of the reservoir in order to assess the impacts on water availability for other users. We apply the method to a large dataset of almost 1500 globally distributed hydropower plants (HPPs), covering ~43% of global annual electricity generation, by combining reservoir information from the Global Reservoir and Dam (GRanD) database with information on electricity generation from the CARMA database. While we can confirm that the gross water consumption of hydropower is generally large (production-weighted average of 97 m3/GJ), other users are not necessarily deprived of water. In contrast, they also benefit in many cases from the reservoir because water is rather stored in the wet season and released in the dry season, thereby alleviating water stress. The production-weighted water scarcity footprint of the analyzed HPPs amounts to -41 m3 H2Oe/GJ. It has to be noted that the impacts among individual plants vary a lot. Larger HPPs generally consume less water per unit of electricity generated, but also the benefits related to alleviating water scarcity are lower. Overall, reservoirs promote both, energy and water security. Other environmental impacts such as flow alterations and social impacts should, however, also be considered, as they can be

  16. Integrate System Modeling for Design and Production Planning of High Quality Products Considering Failure Data

    Science.gov (United States)

    Aoyama, Kazuhiro; Koga, Tsuyoshi

    2009-07-01

    Since the product recall problem is recently observed, realizing design and production activities that can prevent occurrences of a product failure has been becoming a serious issue. This paper proposes "the Synthetic design approach of a product and a production process which enables to reduce occurrences of a product failure from the initial stage of a product development." In order to realize this proposed concept as a specific system, the integrated model of the failure information in the design and production is introduced. This paper shows some examples of design and production for a circuit breaker and an automobile with considering a design error and a production failure using developed prototype system.

  17. Models and Algorithms for Production Planning and Scheduling in Foundries – Current State and Development Perspectives

    Directory of Open Access Journals (Sweden)

    A. Stawowy

    2012-04-01

    Full Text Available Mathematical programming, constraint programming and computational intelligence techniques, presented in the literature in the field of operations research and production management, are generally inadequate for planning real-life production process. These methods are in fact dedicated to solving the standard problems such as shop floor scheduling or lot-sizing, or their simple combinations such as scheduling with batching. Whereas many real-world production planning problems require the simultaneous solution of several problems (in addition to task scheduling and lot-sizing, the problems such as cutting, workforce scheduling, packing and transport issues, including the problems that are difficult to structure. The article presents examples and classification of production planning and scheduling systems in the foundry industry described in the literature, and also outlines the possible development directions of models and algorithms used in such systems.

  18. Optimized production planning model for a multi-plant cultivation system under uncertainty

    Science.gov (United States)

    Ke, Shunkui; Guo, Doudou; Niu, Qingliang; Huang, Danfeng

    2015-02-01

    An inexact multi-constraint programming model under uncertainty was developed by incorporating a production plan algorithm into the crop production optimization framework under the multi-plant collaborative cultivation system. In the production plan, orders from the customers are assigned to a suitable plant under the constraints of plant capabilities and uncertainty parameters to maximize profit and achieve customer satisfaction. The developed model and solution method were applied to a case study of a multi-plant collaborative cultivation system to verify its applicability. As determined in the case analysis involving different orders from customers, the period of plant production planning and the interval between orders can significantly affect system benefits. Through the analysis of uncertain parameters, reliable and practical decisions can be generated using the suggested model of a multi-plant collaborative cultivation system.

  19. A Label Correcting Algorithm for Partial Disassembly Sequences in the Production Planning for End-of-Life Products

    Directory of Open Access Journals (Sweden)

    Pei-Fang (Jennifer Tsai

    2012-01-01

    Full Text Available Remanufacturing of used products has become a strategic issue for cost-sensitive businesses. Due to the nature of uncertain supply of end-of-life (EoL products, the reverse logistic can only be sustainable with a dynamic production planning for disassembly process. This research investigates the sequencing of disassembly operations as a single-period partial disassembly optimization (SPPDO problem to minimize total disassembly cost. AND/OR graph representation is used to include all disassembly sequences of a returned product. A label correcting algorithm is proposed to find an optimal partial disassembly plan if a specific reusable subpart is retrieved from the original return. Then, a heuristic procedure that utilizes this polynomial-time algorithm is presented to solve the SPPDO problem. Numerical examples are used to demonstrate the effectiveness of this solution procedure.

  20. Future efficiency of run of the river hydropower schemes based on climate change scenarios: case study in UK catchments

    Science.gov (United States)

    Pasten Zapata, Ernesto; Moggridge, Helen; Jones, Julie; Widmann, Martin

    2017-04-01

    Run-of-the-River (ROR) hydropower schemes are expected to be importantly affected by climate change as they rely in the availability of river flow to generate energy. As temperature and precipitation are expected to vary in the future, the hydrological cycle will also undergo changes. Therefore, climate models based on complex physical atmospheric interactions have been developed to simulate future climate scenarios considering the atmosphere's greenhouse gas concentrations. These scenarios are classified according to the Representative Concentration Pathways (RCP) that are generated according to the concentration of greenhouse gases. This study evaluates possible scenarios for selected ROR hydropower schemes within the UK, considering three different RCPs: 2.6, 4.5 and 8.5 W/m2 for 2100 relative to pre-industrial values. The study sites cover different climate, land cover, topographic and hydropower scheme characteristics representative of the UK's heterogeneity. Precipitation and temperature outputs from state-of-the-art Regional Climate Models (RCMs) from the Euro-CORDEX project are used as input for a HEC-HMS hydrological model to simulate the future river flow available. Both uncorrected and bias-corrected RCM simulations are analyzed. The results of this project provide an insight of the possible effects of climate change towards the generation of power from the ROR hydropower schemes according to the different RCP scenarios and contrasts the results obtained from uncorrected and bias-corrected RCMs. This analysis can aid on the adaptation to climate change as well as the planning of future ROR schemes in the region.

  1. Requirements and benefits of flow forecasting for improving hydropower generation

    NARCIS (Netherlands)

    Dong, Xiaohua; Vrijling, J.K.; Dohmen-Janssen, Catarine M.; Ruigh, E.; Booij, Martijn J.; Stalenberg, B.; Hulscher, Suzanne J.M.H.; van Gelder, P.H.A.J.M.; Verlaan, M.; Zijderveld, A.; Waarts, P.

    2005-01-01

    This paper presents a methodology to identify the required lead time and accuracy of flow forecasting for improving hydropower generation of a reservoir, by simulating the benefits (in terms of electricity generated) obtained from the forecasting with varying lead times and accuracies. The

  2. modelling of hydropower reservoir variables for energy generation

    African Journals Online (AJOL)

    Osondu

    hydropower is found to be of highest grade of energy (Sambo, 2006). Hydroelectricity comes from the conversion of potential energy of water through turbines and electric generator system. Aliyu and Elegba (1990) indicated that Nigeria is endowed with several potential renewable sources of energy and identified a total of ...

  3. Modeling of Reservoir Inflow for Hydropower Dams Using Artificial ...

    African Journals Online (AJOL)

    The stream flow at the three hydropower reservoirs in Nigeria were modeled using hydro-meteorological parameters and Artificial Neural Network (ANN). The model revealed positive relationship between the observed and the modeled reservoir inflow with values of correlation coefficient of 0.57, 0.84 and 0.92 for Kainji, ...

  4. A feasibility and implementation model of small-scale hydropower ...

    African Journals Online (AJOL)

    Large numbers of households and communities will not be connected to the national electricity grid for the foreseeable future due to high cost of transmission and distribution systems to remote communities and the relatively low electricity demand within rural communities. Small-scale hydropower used to play a very ...

  5. The potential impacts of climate change on hydropower: An ...

    African Journals Online (AJOL)

    Osborne

    Key words: Climate change, discharge rate, hydropower, Malawi, precipitation, temperature. INTRODUCTION. Environmental change, manifested by climate change and variability, is no longer a mythical discourse; the scientific consensus is not only that, human activities have contributed to it significantly, but the change is ...

  6. Systematic high-resolution assessment of global hydropower potential

    NARCIS (Netherlands)

    Hoes, Olivier A C; Meijer, Lourens J J; Van Der Ent, Ruud J.; Van De Giesen, Nick C.

    2017-01-01

    Population growth, increasing energy demand and the depletion of fossil fuel reserves necessitate a search for sustainable alternatives for electricity generation. Hydropower could replace a large part of the contribution of gas and oil to the present energy mix. However, previous high-resolution

  7. The blue water footprint of electricity from hydropower

    NARCIS (Netherlands)

    Mekonnen, Mesfin; Hoekstra, Arjen Ysbert

    2012-01-01

    Hydropower accounts for about 16% of the world's electricity supply. It has been debated whether hydroelectric generation is merely an in-stream water user or whether it also consumes water. In this paper we provide scientific support for the argument that hydroelectric generation is in most cases a

  8. assessment of the hydropower potential of kangimi reservoir

    African Journals Online (AJOL)

    2012-11-03

    Nov 3, 2012 ... Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria. ... Kangimi reservoir to conjunctively meet the water demands for the newly proposed hydropower and designed water supply and ..... basins and leading to environmental degradation and farmland ...

  9. Reconnaissance Report for Hydropower Redevelopment at Sault Ste. Marie, Michigan.

    Science.gov (United States)

    1981-01-01

    Chairman Sugarman regarding the feasibility study on hydropower redevelopment at Sault Ste. Marie, Michigan The Commission would appreciate being...United States Government in a timely fashion. Sincerely, David A. LaRoche Secretary United States Section cc: Wingate Lloyd, Department of State F-II-8

  10. Development of Sustainability Assessment Framework in Hydropower sector

    Science.gov (United States)

    Soliha Sahimi, Nur; Turan, Faiz Mohd; Johan, Kartina

    2017-08-01

    Nowadays, Malaysian demand in energy sector was drastically increase due to technological developments. Since, hydropower is one of potential renewable energy source in Malaysia. The largest electricity utility company, Tenaga Nasional Berhad was provide an electricity to more than seven million people via independent suppliers in peninsular Malaysia and Sabah by intended a potential sustainable hydropower system. In order to increasingly the power capacity from current use, 1882 MW to more than 3000 MW by years 2020. In this study, the environmental issues and also the penalty to the responsible company especially on Tenaga Nasional Berhad (TNB) towards their project or business are one of the problems. Other than that, every project or business has to prepare a sustainability statement or sustainability report as vital to Bursa Malaysia Securities Berhad under their listing requirements. Next, the sustainability performance on their project cannot be determined to achieve the key performance indicators (KPI) satisfaction from Government, stakeholder or any responsible agencies. This study presents an exhaustive review of these studies and suggests a direction for future developments. Sustainability Assessment framework or self-assessment is decidedly as a significant framework to assist towards sustainability reporting and to produce a Sustainability index for Hydropower sector using a mathematical model study. The results reveal that, the quantitative measurement from Sustainability Assessment framework to Systematic Sustainability Asssesment tool can be produce. In doing so, it is possible to improve the performance of the project especially in hydropower planner.

  11. Stochastic multi-period multi-product multi-objective Aggregate Production Planning model in multi-echelon supply chain

    OpenAIRE

    Khalili-Damghani, Kaveh; Shahrokh, Ayda; Pakgohar, Alireza

    2017-01-01

    [EN] In this paper a multi-period multi-product multi-objective aggregate production planning (APP) model is proposed for an uncertain multi-echelon supply chain considering financial risk, customer satisfaction, and human resource training. Three conflictive objective functions and several sets of real constraints are considered concurrently in the proposed APP model. Some parameters of the proposed model are assumed to be uncertain and handled through a two-stage stochastic programming (TSS...

  12. INTEGRATED METHODOLOGY FOR PRODUCT PLANNING USING MULTI CRITERIA ANALYSIS

    Directory of Open Access Journals (Sweden)

    Tarun Soota

    2016-09-01

    Full Text Available Integrated approach to multi-criteria decision problems is proposed using quality function deployment and analytical network process. The objective of the work is to rationalize and improve the method of analyzing and interpreting customer needs and technical requirements. The methodology is used to determine, prioritize engineering requirements based on customer needs for development of best product. Framework allows decision maker to decompose a complex problem in a hierarchical structure to show relationship between objective and criteria. Multi-criteria decision modeling is used for extending the hierarchy process to both dependence and feedback. A case study on bikes is presented for the proposed model.

  13. Two new micro hydropower plants at Osco; Creazione di due microcentrali elettriche nel territorio di Osco. Rapporto finale dicembre 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    A feasibility study for two small hydropower plants in Osco, southern Switzerland is reported. This alpine community wants to take advantage of an elevation difference of 1500 m between a possible water catchment on a mountain stream and the location of a future hydropower plant. The report confirms the technical and economical feasibility of the project. Two series-connected plants are foreseen, with a total power of about 500 kW and a yearly expected production of 3,375,000 kWh. The project would have a positive side-effects on the public relations of the community and on education in its schools. It would prevent land slides that may happen on the steep hillsides after heavy rain fall and improve the availability of useful water resources downhill in the main valley. Federal and regional subsidies are expected. Construction work is thought to begin 2008.

  14. Renewal of the Stanipac hydropower plant in Burgdorf; Febacom AG - Burgdorf. Gesamterneuerung Kraftwerk Stanipac - Burgdorf. Vorprojektstudie - Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Hintermann, M.

    2007-07-01

    This report for the Swiss Federal Office of Energy (SFOE), takes a look at the results of a preliminary study on the renewal of the Stanipac hydropower installation in Burgdorf, Switzerland. This small hydropower plant is the first of a series of nine installations situated along a canal. Proposals for the renewal of the installation are discussed. Topographical and hydrological factors are presented and discussed. Also, data on water quantities is presented. The existing installation dating from 1946 is described. Three variants for the renewal are noted and the appropriate installations, their costs and their production estimates are discussed. A best solution is proposed and the necessary installations are described in more detail, as is the economic viability of the scheme. Photos of the existing installation, figures on the proposed installation and project sketches are presented.

  15. Using hydropower to complement wind energy: a hybrid system to provide firm power

    Energy Technology Data Exchange (ETDEWEB)

    Jaramillo, O.A.; Borja, M.A.; Huacuz, J.M. [Instituto de Investigaciones Electricas, Morelos (Mexico). Energias No Convencionales

    2004-09-01

    This paper presents a theoretical study of how wind power can be complemented by hydropower. A conceptual framework is provided for a hybrid power station that produces constant power output without the intermittent fluctuations inherent when using wind power. Two hypothetical facilities are considered as case studies. One of them is a hydropower plant located on the ''Presidente Benito Juarez'' dam in Jalapa del Marques, Oaxaca, Mexico. The other hypothetical facility is a wind farm located near ''La Venta's', an area in Juchitan, Oaxaca, Mexico. The wind-hydro-power system is a combined wind and hydro power plant in a region that is rich in both resources. The model shows that the hybrid plant could provide close to 20 MW of firm power to the electrical distribution system. On a techno-economic basis, we obtain the levelized production cost of the hybrid system. Taking into account two different discount rates of 7% and 10%, figures for levelized production cost are developed. (author)

  16. Aggregation Methods for Modelling Hydropower and Its Implications for a Highly Decarbonised Energy System in Europe

    Directory of Open Access Journals (Sweden)

    Philipp Härtel

    2017-11-01

    Full Text Available Given the pursuit of long-term decarbonisation targets, future power systems face the task of integrating the renewable power and providing flexible backup production capacity. Due to its general ability to be dispatched, hydropower offers unique features and a backup production option not to be neglected, especially when taking the flexibility potential of multireservoir systems into account. Adequate hydropower representations are a necessity when analysing future power markets and aggregation methods are crucial for overcoming computational challenges. However, a major issue is that the aggregation must not be a too flexible representation. In a first step, a novel equivalent hydro system model implementation including a possibility to integrate pumping capacity and appropriate handling of multiple water paths (hydraulic coupling by making use of an ex-ante optimisation is proposed. In a second step, a clustered equivalent hydro system model implementation employing k-means clustering is presented. A comparison of both aggregation approaches against the detailed reference system shows that both aggregated model variants yield significant reductions in computation time while keeping an adequate level of accuracy for a highly decarbonised power system scenario in Europe. The aggregation methods can easily be applied in different model types and may also be helpful in the stochastic case.

  17. PLAN OF ACTIONS TO PREVENT, CONTROL AND DESINFECT CONTAMINATED PRODUCTS OF FUNGI AND AFLATOXINS

    OpenAIRE

    Armijo C., J.; Departamento Académico de Operaciones Unitarias, Facultad de Química e Ing. Química Universidad Nacional Mayor de San Marcos Lima, Perú; Calderón, J.; Departamento Académico de Operaciones Unitarias, FQIQ, Universidad Nacional Mayor de San Marcos, Lima, Perú

    2014-01-01

    Aflatoxins, a group of highly toxic substances produced by certain species of Aspergillus, especially A. flavus, have been found to occur in agricultural products such as corn, peanuts, cotton seed, animal feed, and many varieties of nuts. Experimental studies show that aflatoxins are carcinogenic. This paper proposes a plan of actions to prevent, control and desinfecting products contaminated with aflatoxins. Post harvest treatment of the product involves drying and storage temperature of 5 ...

  18. 78 FR 14635 - HACCP Plan Reassessment for Not-Ready-To-Eat Comminuted Poultry Products and Related Agency...

    Science.gov (United States)

    2013-03-07

    ... Inspection Service 9 CFR Part 417 HACCP Plan Reassessment for Not-Ready-To-Eat Comminuted Poultry Products... extending the comment period for the December 6, 2012, Federal Register document ``HACCP Plan Reassessment... Control Points (HACCP) plans for those products. FSIS will postpone by 45 days the date inspection...

  19. Regulatory approaches for addressing dissolved oxygen concerns at hydropower facilities

    Energy Technology Data Exchange (ETDEWEB)

    Peterson, Mark J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Cada, Glenn F. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Sale, Michael J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Eddlemon, Gerald K. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2003-03-01

    Low dissolved oxygen (DO) concentrations are a common water quality problem downstream of hydropower facilities. At some facilities, structural improvements (e.g. installation of weir dams or aerating turbines) or operational changes (e.g., spilling water over the dam) can be made to improve DO levels. In other cases, structural and operational approaches are too costly for the project to implement or are likely to be of limited effectiveness. Despite improvements in overall water quality below dams in recent years, many hydropower projects are unable to meet state water quality standards for DO. Regulatory agencies in the U.S. are considering or implementing dramatic changes in their approach to protecting the quality of the Nation’s waters. New policies and initiatives have emphasized flexibility, increased collaboration and shared responsibility among all parties, and market-based, economic incentives. The use of new regulatory approaches may now be a viable option for addressing the DO problem at some hydropower facilities. This report summarizes some of the regulatory-related options available to hydropower projects, including negotiation of site-specific water quality criteria, use of biological monitoring, watershed-based strategies for the management of water quality, and watershed-based trading. Key decision points center on the health of the local biological communities and whether there are contributing impacts (i.e., other sources of low DO effluents) in the watershed. If the biological communities downstream of the hydropower project are healthy, negotiation for site-specific water quality standards or biocriteria (discharge performance criteria based on characteristics of the aquatic biota) might be pursued. If there are other effluent dischargers in the watershed that contribute to low DO problems, watershed-scale strategies and effluent trading may be effective. This report examines the value of regulatory approaches by reviewing their use in

  20. Dynamic Optimization and Production Planning of Thermal Cracking Operation

    Directory of Open Access Journals (Sweden)

    Emil H. Edwin

    2003-04-01

    Full Text Available This work addresses the dynamic optimization of the production period of thermal crackers with respect to coke formation in the cracking coil and transfer line exchanger. Optimal time dependent trajectories of feed rate, steam to hydrocarbon ratio, and reaction severity are calculated. The net earnings based on the price of hydrocarbons, kid, steam, decoking, and maintenance cost are maximized. All important operational constraints are included and the optimization problem is solved using parameterized free variable trajectories (piece wise constant and a standard SQP package. Rigorous distributed physical models are used and calculation show that dynamic optimization gives up to 2( earnings - expenses than conventional steady state optimization performed on the same models. This is in the same range as earnings reported from steady state optimization implementations alone.

  1. PLAN 2003. Costs for management of the radioactive waste products from nuclear power production

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-06-01

    The companies that own nuclear power plants in Sweden are responsible for adopting measures needed to manage and dispose of spent nuclear fuel and radioactive waste from the Swedish nuclear power reactors in a safe manner. The so-called Financing Act (1992:1537) is linked to this responsibility and prescribes that a reactor owner, in consultation with other reactor owners, shall calculate the cost for management and disposal of the spent fuel and radioactive waste and for decommissioning and dismantling of the reactor plant. The reactor owner shall annually submit to the regulatory authority the cost data that are required for calculation of the fees to be imposed on electricity production during the ensuing year and of the guarantees that must be given as security for costs not covered by paid-in fees. The reactor owners have jointly commissioned SKB to calculate and compile these costs. This report presents a calculation of the costs for implementing all of these measures. The cost calculations are based on the plan for management and disposal of the radioactive waste that has been prepared by SKB and is described in this report. The following facilities and systems are in operation: Transportation system for radioactive waste products; Central interim storage facility for spent nuclear fuel, CLAB; Final repository for radioactive operational waste, SFR 1. Plans also exist for: Canister factory and encapsulation plant for spent nuclear fuel; Deep repository for spent nuclear fuel; Final repository for long-lived low- and intermediate-level waste; Final repository for decommissioning waste. The cost calculations also include costs for research, development and demonstration, as well as for decommissioning and dismantling the reactor plants. This report is based on the proposed strategy for the activities which is presented in SKB's RD and D-Programme 2001 and in the supplementary account to RD and D-Programme 98 which SKB submitted to the regulatory authority

  2. Multi-Objective Sustainable Operation of the Three Gorges Cascaded Hydropower System Using Multi-Swarm Comprehensive Learning Particle Swarm Optimization

    Directory of Open Access Journals (Sweden)

    Xiang Yu

    2016-06-01

    Full Text Available Optimal operation of hydropower reservoir systems often needs to optimize multiple conflicting objectives simultaneously. The conflicting objectives result in a Pareto front, which is a set of non-dominated solutions. Non-dominated solutions cannot outperform each other on all the objectives. An optimization framework based on the multi-swarm comprehensive learning particle swarm optimization algorithm is proposed to solve the multi-objective operation of hydropower reservoir systems. Through adopting search techniques such as decomposition, mutation and differential evolution, the algorithm tries to derive multiple non-dominated solutions reasonably distributed over the true Pareto front in one single run, thereby facilitating determining the final tradeoff. The long-term sustainable planning of the Three Gorges cascaded hydropower system consisting of the Three Gorges Dam and Gezhouba Dam located on the Yangtze River in China is studied. Two conflicting objectives, i.e., maximizing hydropower generation and minimizing deviation from the outflow lower target to realize the system’s economic, environmental and social benefits during the drought season, are optimized simultaneously. Experimental results demonstrate that the optimization framework helps to robustly derive multiple feasible non-dominated solutions with satisfactory convergence, diversity and extremity in one single run for the case studied.

  3. Stochastic multi-period multi-product multi-objective Aggregate Production Planning model in multi-echelon supply chain

    Directory of Open Access Journals (Sweden)

    Kaveh Khalili-Damghani

    2017-07-01

    Full Text Available In this paper a multi-period multi-product multi-objective aggregate production planning (APP model is proposed for an uncertain multi-echelon supply chain considering financial risk, customer satisfaction, and human resource training. Three conflictive objective functions and several sets of real constraints are considered concurrently in the proposed APP model. Some parameters of the proposed model are assumed to be uncertain and handled through a two-stage stochastic programming (TSSP approach. The proposed TSSP is solved using three multi-objective solution procedures, i.e., the goal attainment technique, the modified ε-constraint method, and STEM method. The whole procedure is applied in an automotive resin and oil supply chain as a real case study wherein the efficacy and applicability of the proposed approaches are illustrated in comparison with existing experimental production planning method.

  4. The key to successful management of STS operations: An integrated production planning system

    Science.gov (United States)

    Johnson, W. A.; Thomasen, C. T.

    1985-01-01

    Space Transportation System operations managers are being confronted with a unique set of challenges as a result of increasing flight rates, the demand for flight manifest/production schedule flexibility and an emphasis on continued cost reduction. These challenges have created the need for an integrated production planning system that provides managers with the capability to plan, schedule, status and account for an orderly flow of products and services across a large, multi-discipline organization. With increased visibility into the end-to-end production flow for individual and parallel missions in process, managers can assess the integrated impact of changes, identify and measure the interrelationships of resource, schedule, and technical performance requirements and prioritize productivity enhancements.

  5. Improving food safety in the supply chain: Integrating traceability in production and distribution planning

    DEFF Research Database (Denmark)

    Grunow, Martin; Rong, Aiying; Akkerman, Renzo

    2008-01-01

    After a number of food safety crises, the design and implementation of traceability systems became an important focus of the food industry. As a result, food product traceability ranks high on senior management agendas for supply chain activities. In the literature, numerous studies deal...... with traceability from the viewpoint of information system development and technology development such as radio frequency identification (RFID) and DNA-based techniques. However, traceability and its implications for food safety are thus far not incorporated in the standard operations management literature...... on production and distribution planning. Here, we develop a methodology for production and distribution planning in food supply chains which minimizes production and logistics costs and at the same time reduces food safety concerns, limits the size of potential recalls, and satisfies product quality...

  6. Polar View Snow Service- Operational Snow Cover Mapping for Downstream Runoff Modeling and Hydropower Predictions

    Science.gov (United States)

    Bach, Heike; Appel, Florian; Rust, Felix; Mauser, Wolfram

    2010-12-01

    Information on snow cover and snow properties are important for hydrology and runoff modelling. Frequent updates of snow cover observation, especially for areas characterized by short-term snow dynamics, can help to improve water balance and discharge calculations. Within the GMES service element Polar View, VISTA offers a snow mapping service for Central Europe since several years [1, 2]. We outline the use of this near-real- time product for hydrological applications in Alpine environment. In particular we discuss the integration of the Polar View product into a physically based hydrological model (PROMET). This allows not only the provision of snow equivalent values, but also enhances river runoff modelling and its use in hydropower energy yield prediction. The GMES snow products of Polar View are thus used in a downstream service for water resources management, providing information services for renewable energy suppliers and energy traders.

  7. Retrospective value analysis of decision support benefits from a production planning system for a brewery

    Directory of Open Access Journals (Sweden)

    H.W. Ittmann

    2003-12-01

    Full Text Available A decision support system for production planning in a brewing company was developed to assist with the planning of brewing, packaging and distribution of beer and to minimise production costs. Having been in operation for some time, the system has changed and adapted in a very dynamic environment. The system's present form and current use are discussed. Initial management approval for system development was based on faith rather than proper cost-benefit and value analyses. This paper aims at retrospectively highlighting these values and benefits with regard to supporting decision-making in the company.

  8. Water chemical evolution in Underground Pumped Storage Hydropower plants and induced consequences

    Science.gov (United States)

    Pujades, Estanislao; Orban, Philippe; Jurado, Anna; Ayora, Carlos; Brouyère, Serge; Dassargues, Alain

    2017-04-01

    Underground Pumped Storage Hydropower (UPSH) using abandoned mines is an alternative to manage the electricity production in flat regions. UPSH plants consist of two reservoirs; the upper reservoir is located at the surface or at shallow depth, while the lower reservoir is underground. These plants have potentially less constraints that the classical Pumped Storage Hydropower plants because more sites are available and impacts on landscape, land use, environment and society seem lower. Still, it is needed to consider the consequences of the groundwater exchanges occurring between the underground reservoir and surrounding porous media. Previous studies have been focused on the influence of these groundwater exchanges on the efficiency and on groundwater flow impacts. However, hydrochemical variations induced by the surface exposure of pumped water and their consequences have not been yet addressed. The objective of this work is to evaluate the hydrochemical evolution of the water in UPSH plants and its effects on the environment and on the UPSH efficiency. The problem is studied numerically by means of reactive transport modelling. Different scenarios are considered varying the chemical properties of the surrounding porous medium and groundwater. Results show that the dissolution and/or precipitation of some compounds may affect (1) the groundwater quality, and (2) the efficiency and the useful life of the used pumps and turbines of the UPSH system.

  9. Probabilistic-Multiobjective Comparison of User-Defined Operating Rules. Case Study: Hydropower Dam in Spain

    Directory of Open Access Journals (Sweden)

    Paola Bianucci

    2015-03-01

    Full Text Available A useful tool is proposed in this paper to assist dam managers in comparing and selecting suitable operating rules. This procedure is based on well-known multiobjective and probabilistic methodologies, which were jointly applied here to assess and compare flood control strategies in hydropower reservoirs. The procedure consisted of evaluating the operating rules’ performance using a simulation fed by a representative and sufficiently large flood event series. These flood events were obtained from a synthetic rainfall series stochastically generated by using the RainSimV3 model coupled with a deterministic hydrological model. The performance of the assessed strategies was characterized using probabilistic variables. Finally, evaluation and comparison were conducted by analyzing objective functions which synthesize different aspects of the rules’ performance. These objectives were probabilistically defined in terms of risk and expected values. To assess the applicability and flexibility of the tool, it was implemented in a hydropower dam located in Galicia (Northern Spain. This procedure allowed alternative operating rule to be derived which provided a reasonable trade-off between dam safety, flood control, operability and energy production.

  10. Practical application of game theory based production flow planning method in virtual manufacturing networks

    Science.gov (United States)

    Olender, M.; Krenczyk, D.

    2016-08-01

    Modern enterprises have to react quickly to dynamic changes in the market, due to changing customer requirements and expectations. One of the key area of production management, that must continuously evolve by searching for new methods and tools for increasing the efficiency of manufacturing systems is the area of production flow planning and control. These aspects are closely connected with the ability to implement the concept of Virtual Enterprises (VE) and Virtual Manufacturing Network (VMN) in which integrated infrastructure of flexible resources are created. In the proposed approach, the players role perform the objects associated with the objective functions, allowing to solve the multiobjective production flow planning problems based on the game theory, which is based on the theory of the strategic situation. For defined production system and production order models ways of solving the problem of production route planning in VMN on computational examples for different variants of production flow is presented. Possible decision strategy to use together with an analysis of calculation results is shown.

  11. Robust Production Planning in Fashion Apparel Industry under Demand Uncertainty via Conditional Value at Risk

    Directory of Open Access Journals (Sweden)

    Abderrahim Ait-Alla

    2014-01-01

    Full Text Available This paper presents a mathematical model for robust production planning. The model helps fashion apparel suppliers in making decisions concerning allocation of production orders to different production plants characterized by different lead times and production costs, and in proper time scheduling and sequencing of these production orders. The model aims at optimizing these decisions concerning objectives of minimal production costs and minimal tardiness. It considers several factors such as the stochastic nature of customer demand, differences in production and transport costs and transport times between production plants in different regions. Finally, the model is applied to a case study. The results of numerical computations are presented. The implications of the model results on different fashion related product types and delivery strategies, as well as the model’s limitations and potentials for expansion, are discussed. Results indicate that the production planning model using conditional value at risk (CVaR as the risk measure performs robustly and provides flexibility in decision analysis between different scenarios.

  12. Advance Planning, Programming and Production Control as key Activities Now the Environmental Education

    Directory of Open Access Journals (Sweden)

    Geraldo Cardoso de Oliveira Neto

    2015-06-01

    Full Text Available This work addresses the evolution of Planning, Programming and Control of Production (PPCP as essential activities of the company towards the insertion of environmental education. The approach is based on an exploratory research and a critical bibliographic revision. Two main objectives were established: i a new way of production organization, by considering cleaner production from company utilities to production capacity, technology and outsourcing and ii infrastructure changes related to market attendance and environmental education dissemination. Needs that arise can be grouped as follows: utilities adequacy, cleaner technologies and ecochains implementation; instruction and dissemination of environmental education; and necessity of the adoption of new paradigms.

  13. Hydropower Optimization Using Artificial Neural Network Surrogate Models of a High-Fidelity Hydrodynamics and Water Quality Model

    Science.gov (United States)

    Shaw, Amelia R.; Smith Sawyer, Heather; LeBoeuf, Eugene J.; McDonald, Mark P.; Hadjerioua, Boualem

    2017-11-01

    Hydropower operations optimization subject to environmental constraints is limited by challenges associated with dimensionality and spatial and temporal resolution. The need for high-fidelity hydrodynamic and water quality models within optimization schemes is driven by improved computational capabilities, increased requirements to meet specific points of compliance with greater resolution, and the need to optimize operations of not just single reservoirs but systems of reservoirs. This study describes an important advancement for computing hourly power generation schemes for a hydropower reservoir using high-fidelity models, surrogate modeling techniques, and optimization methods. The predictive power of the high-fidelity hydrodynamic and water quality model CE-QUAL-W2 is successfully emulated by an artificial neural network, then integrated into a genetic algorithm optimization approach to maximize hydropower generation subject to constraints on dam operations and water quality. This methodology is applied to a multipurpose reservoir near Nashville, Tennessee, USA. The model successfully reproduced high-fidelity reservoir information while enabling 6.8% and 6.6% increases in hydropower production value relative to actual operations for dissolved oxygen (DO) limits of 5 and 6 mg/L, respectively, while witnessing an expected decrease in power generation at more restrictive DO constraints. Exploration of simultaneous temperature and DO constraints revealed capability to address multiple water quality constraints at specified locations. The reduced computational requirements of the new modeling approach demonstrated an ability to provide decision support for reservoir operations scheduling while maintaining high-fidelity hydrodynamic and water quality information as part of the optimization decision support routines.

  14. Is the economic value of hydrological forecasts related to their quality? Case study of the hydropower sector.

    Science.gov (United States)

    Cassagnole, Manon; Ramos, Maria-Helena; Thirel, Guillaume; Gailhard, Joël; Garçon, Rémy

    2017-04-01

    The improvement of a forecasting system and the evaluation of the quality of its forecasts are recurrent steps in operational practice. However, the evaluation of forecast value or forecast usefulness for better decision-making is, to our knowledge, less frequent, even if it might be essential in many sectors such as hydropower and flood warning. In the hydropower sector, forecast value can be quantified by the economic gain obtained with the optimization of operations or reservoir management rules. Several hydropower operational systems use medium-range forecasts (up to 7-10 days ahead) and energy price predictions to optimize hydropower production. Hence, the operation of hydropower systems, including the management of water in reservoirs, is impacted by weather, climate and hydrologic variability as well as extreme events. In order to assess how the quality of hydrometeorological forecasts impact operations, it is essential to first understand if and how operations and management rules are sensitive to input predictions of different quality. This study investigates how 7-day ahead deterministic and ensemble streamflow forecasts of different quality might impact the economic gains of energy production. It is based on a research model developed by Irstea and EDF to investigate issues relevant to the links between quality and value of forecasts in the optimisation of energy production at the short range. Based on streamflow forecasts and pre-defined management constraints, the model defines the best hours (i.e., the hours with high energy prices) to produce electricity. To highlight the link between forecasts quality and their economic value, we built several synthetic ensemble forecasts based on observed streamflow time series. These inputs are generated in a controlled environment in order to obtain forecasts of different quality in terms of accuracy and reliability. These forecasts are used to assess the sensitivity of the decision model to forecast quality

  15. Product Plan of New Generation System Camera "OLYMPUS PEN E-P1"

    Science.gov (United States)

    Ogawa, Haruo

    "OLYMPUS PEN E-P1", which is new generation system camera, is the first product of Olympus which is new standard "Micro Four-thirds System" for high-resolution mirror-less cameras. It continues good sales by the concept of "small and stylish design, easy operation and SLR image quality" since release on July 3, 2009. On the other hand, the half-size film camera "OLYMPUS PEN" was popular by the concept "small and stylish design and original mechanism" since the first product in 1959 and recorded sale number more than 17 million with 17 models. By the 50th anniversary topic and emotional value of the Olympus pen, Olympus pen E-P1 became big sales. I would like to explain the way of thinking of the product plan that included not only the simple functional value but also emotional value on planning the first product of "Micro Four-thirds System".

  16. Planning the marketing activities in the animal production sector in Republic of Macedonia

    Directory of Open Access Journals (Sweden)

    Sekovska Blagica

    2007-11-01

    Full Text Available Although the marketing and marketing planning are considered as the main conditions for achieving successful management of the animal production farms, a great number of the farmers in Republic of Macedonia do not have their own plan for marketing solutions. Planning of the marketing activities is necessary for contemporary farm management because they have a great impact on the farmer’s final profit. To achieve an effective management of the farm, the marketing planning should be viewed in scope of the production planning and financing of the production unit. The planning is fundamental for the effectiveness of every animal production unit. Of course, there are cases where not everything can be achieved as planned, as it is when unpredicted situations occur, and in these cases the farmer should react promptly in order to adapt to the new conditions. Nevertheless, the marketing plan is the foundation for taking further effective marketing solutions, which on the other side will provide maximal profit for the owner. It should be noted that the organization of the marketing activities in the animal production sector in Republic of Macedonia is very poor. The few bigger agricultural organizations, such are some privatized units of the former state-owned agricultural organizations, do have certain elements of marketing activities, but that is far from serious marketing approach. Everywhere is obvious the lack of development plan. The few pale traces of marketing elements that can be found in some farms, are mainly lacking solid background i.e. they do not take into consideration the availability of the resources, the demand of the market, as well as a target group of consumers, but instead they are simply copied from some others, more successful organizations, which give us the right to call it “imitation marketing”. Being not adapted to the capabilities of the organization, nor to the market or the consumers that is meant for, this type of

  17. The Planning and Digital Design for Welding Production Line of the Car Rear Floor

    OpenAIRE

    Zhang Chun-Yan; Qiao Yin-Hu; Li Feng; Chen Jie-Ping

    2013-01-01

    The last two sub-assembly welding production line of the car rear floor is designed in this paper. Firstly, the welding production line of the car rear floor is complete planned and designed from global aspect by analysis the structure of body-in-white and the car rear floor; Secondly, each working position fixture are designed and the location of all fixture are arranged according to location and spot welding requirements with the CATIA software. Finally, the conveying appliance of wel...

  18. OPTIMAL MANAGEMENT STRATEGIES FOR ALFALFA PRODUCTION WITHIN A TOTAL FARM PLAN

    OpenAIRE

    Debertin, David L.; Pagoulatos, Angelos

    1985-01-01

    This paper examines the impacts of alternative management strategies for the production of alfalfa within the context of a total farm plan. A linear programming model is used to represent a 600-acre farm which can grow either grain crops or alfalfa. Alfalfa production competes with the grain crops for available land, labor, machinery, and field time over a calendar of tillage, plating, cutting, spraying, and harvesting activities. The profitability of an acre of alfalfa and the contribution o...

  19. Cavitation-Resistant Coatings for Hydropower Turbines

    Science.gov (United States)

    2011-06-01

    powders , plasma transferred arc powders , and metallizing wire Scott Ostholthoff Does not currently have any products tested to ASTM G32; though they...anti-cavitation and surface hardening coatings. Vendor Product(s) Contact Notes Powder Alloy Inc. Thermal coatings, HVOF powders , plasma spray...provide the weld rod and powder materials. Interested in our research and willing to provide support on tools. They noted new HVOF system, JP5000

  20. A Production Planning Model for Make-to-Order Foundry Flow Shop with Capacity Constraint

    Directory of Open Access Journals (Sweden)

    Xixing Li

    2017-01-01

    Full Text Available The mode of production in the modern manufacturing enterprise mainly prefers to MTO (Make-to-Order; how to reasonably arrange the production plan has become a very common and urgent problem for enterprises’ managers to improve inner production reformation in the competitive market environment. In this paper, a mathematical model of production planning is proposed to maximize the profit with capacity constraint. Four kinds of cost factors (material cost, process cost, delay cost, and facility occupy cost are considered in the proposed model. Different factors not only result in different profit but also result in different satisfaction degrees of customers. Particularly, the delay cost and facility occupy cost cannot reach the minimum at the same time; the two objectives are interactional. This paper presents a mathematical model based on the actual production process of a foundry flow shop. An improved genetic algorithm (IGA is proposed to solve the biobjective problem of the model. Also, the gene encoding and decoding, the definition of fitness function, and genetic operators have been illustrated. In addition, the proposed algorithm is used to solve the production planning problem of a foundry flow shop in a casting enterprise. And comparisons with other recently published algorithms show the efficiency and effectiveness of the proposed algorithm.

  1. Harvest operations for density management: planning requirements, production, costs, stand damage, and recommendations

    Science.gov (United States)

    Loren D. Kellogg; Stephen J. Pilkerton

    2013-01-01

    Since the early 1990s, several studies have been undertaken to determine the planning requirements, productivity, costs, and residual stand damage of harvest operations in thinning treatments designed to promote development of complex forest structure in order to enhance ecological functioning and biological diversity. Th ese studies include the Oregon State...

  2. Asynchrony of wind and hydropower resources in Australia.

    Science.gov (United States)

    Gunturu, Udaya Bhaskar; Hallgren, Willow

    2017-08-18

    Wind and hydropower together constitute nearly 80% of the renewable capacity in Australia and their resources are collocated. We show that wind and hydro generation capacity factors covary negatively at the interannual time scales. Thus, the technology diversity mitigates the variability of renewable power generation at the interannual scales. The asynchrony of wind and hydropower resources is explained by the differential impact of the two modes of the El Ni˜no Southern Oscillation - canonical and Modoki - on the wind and hydro resources. Also, the Modoki El Ni˜no and the Modoki La Ni˜na phases have greater impact. The seasonal impact patterns corroborate these results. As the proportion of wind power increases in Australia's energy mix, this negative covariation has implications for storage capacity of excess wind generation at short time scales and for generation system adequacy at the longer time scales.

  3. Asynchrony of wind and hydropower resources in Australia

    KAUST Repository

    Gunturu, Udaya

    2017-08-14

    Wind and hydropower together constitute nearly 80% of the renewable capacity in Australia and their resources are collocated. We show that wind and hydro generation capacity factors covary negatively at the interannual time scales. Thus, the technology diversity mitigates the variability of renewable power generation at the interannual scales. The asynchrony of wind and hydropower resources is explained by the differential impact of the two modes of the El Ni˜no Southern Oscillation – canonical and Modoki – on the wind and hydro resources. Also, the Modoki El Ni˜no and the Modoki La Ni˜na phases have greater impact. The seasonal impact patterns corroborate these results. As the proportion of wind power increases in Australia’s energy mix, this negative covariation has implications for storage capacity of excess wind generation at short time scales and for generation system adequacy at the longer time scales.

  4. Advanced Pumped Storage Hydropower and Ancillary Services Provision

    Energy Technology Data Exchange (ETDEWEB)

    Muljadi, Eduard; Gevorgian, Vahan; Mohanpurkar, Manish; Luo, Yusheng; Hovsapian, Rob; Koritarov, Vladimir

    2017-07-12

    This paper presents a high-level overview of the capability of advanced pumped storage hydropower to provide ancillary services including frequency regulation and oscillation damping. Type 3 and Type 4 generators are discussed. The examples given are for a small power system that uses a diesel generator as the main generator and a very large system that uses a gas turbine as the main generator.

  5. World Small Hydropower Development Report 2013 - Eastern Africa

    CSIR Research Space (South Africa)

    Jonker Klunne, W

    2013-01-01

    Full Text Available cent) in electricity generation in Burundi, Ethiopia, Zambia, Mozambique and Malawi and it produces a significant amount of electricity in Uganda, Zimbabwe, Tanzania, Madagascar and Kenya. The island topography of Seychelles is not suitable... Energy Information Portal – Reegle3 d. Burundi information: International Renewable Energy Agency. Renewable Energy Profiles4 e. The International Journal on Hydropower & Dams5 f. Kenya, Ministry of Energy6 g. Madagascar, Agence de Développement de l...

  6. My university. What I learned from the Productive Cooperative Movement to Promotion of Humanistic Family Planning.

    Science.gov (United States)

    Kunii, C

    1990-07-01

    Based on experiences with the Productive Cooperative Movement and the Parasite Control Movement in Japan, the Japanese Family Planning Movement began in April 1954. The resultant private and nonprofit Japan Family Planning Association (JFPA) followed and it served to help Japan achieve its goal of reducing fertility by promoting family planning. It did so by publishing a monthly newsletter on family planning, hosting meetings and national conventions, spreading information via the mass media, and selling contraceptives and educational materials. JFPA earned funding from these sales with no support from the government thereby establishing self dependence and freedom to speak candidly to the government. The JFPA learned that families wanted to improve their standard of living and were willing to limit family size to 2 children. After the birth rate peaked in 1955, the birth rate and the number of illegal abortions decreased. In the 1950s, JFPA joined the International Planned Parenthood Federation and subsequently learned of the problems faced by developing countries. Based on the successful reduction of fertility in Japan and a strong economic base, JFPA and the government were in a position to organize an international cooperation program for family planning. Therefore, the leader of JFPA resigned to found the Japanese Organization for International Cooperation in Family Planning which promotes family planning in developing countries via its integrated family planning, nutrition, and parasite control program. A steering committee composed of leaders from government, universities, and private organizations sets the policies for the program in each country. It is to the Japanese government's advantage to work with private organizations instead of providing all social services because they are flexible and provide administrative stability and national expenses are minimized.

  7. Improving clinical productivity in the academic setting: a novel incentive plan based on utility theory.

    Science.gov (United States)

    Wilson, Madeline S; Joiner, Keith A; Inzucchi, Silvio E; Mulligan, Gary J; Mechem, Mary F; Gross, Cary P; Coleman, David L

    2006-04-01

    Academic internal medicine practices face growing challenges to financial viability due to high overhead, competing institutional missions, and suboptimal physician productivity. The authors describe the development of a clinical incentive plan for a group of academic subspecialty physicians at the Dana Clinic, an outpatient setting at Yale School of Medicine, and report on results of the first year's experience under the plan. Utility theory was used to assess the risk profile of clinic faculty and identify incentive payments that would optimize faculty benefit or "utility" while minimizing departmental costs. Under the plan, physicians who reached a productivity target based on work Relative Value Units (wRVUs) between October 2003 and November 2004 had overhead costs covered and received a fixed payment to support salary; additional incentive payments were available for those exceeding the target. Physicians failing to reach the target were responsible for their own overhead costs and received no fixed payment. Physician productivity as measured by wRVU per full-time equivalent (FTE) was compared for the year prior to, and the year following, incentive plan introduction. Forty-seven members of eight academic sections were included in the analysis. Median productivity improved by 34%, with 42 of 47 physicians showing improvement. Significant improvements were also noted in collections (62%) and visit volume (23%), and shifts were observed in coding patterns. The unique threshold-based structure of the incentive plan, as determined through utility theory modeling, as well as permitting physicians to choose how to achieve the wRVU target were key features of its success, resulting in improved productivity without increasing practice resources or faculty salaries.

  8. Modelling ramp-up curves to reflect learning: improving capacity planning in secondary pharmaceutical production

    DEFF Research Database (Denmark)

    Hansen, Klaus Reinholdt Nyhuus; Grunow, Martin

    2015-01-01

    The experience gained during production ramp-up leads to an increase of the effective production capacity over time. However, full utilisation of production capacity is not always possible during ramp-up. In such cases, the experience gained and hence the available effective capacity...... production. Due to its regulatory framework, this industry cannot fully exploit available capacities during ramp-up. We develop a capacity planning model for a new pharmaceutical drug, which determines the number and location of new production lines and the build-up of inventory such that product...... availability at market launch is ensured. Our MILP model is applied to a real industry case study using three empirically observed ramp-up curves to demonstrate its value as decision support tool. We demonstrate the superiority of our volume-dependent method over the traditional time-dependent ramp...

  9. Harnessing the hydropower potential in Africa: What should be the place and role of Grand Inga hydropower project?

    Energy Technology Data Exchange (ETDEWEB)

    Fall, Latsoucabe

    2010-09-15

    Harnessing Africa's huge hydropower potential should be made a priority for the sustainable development of the Continent. Particularly, Grand Inga hydropower project in DRC, due to its gigantic size (40,000 MW) and favourable natural characteristics, could be 'Africa's flagship Project of the 21st Century' offering enormous comparative advantages and opportunities for the benefits of the entire African Continent. Nevertheless, to make it a feasible and palpable 'Model Project', capable of producing clean and affordable energy, the paper tries to respond to key questions on the several daunting challenges to address for its sustainable, cost-effective and timely development and operation.

  10. Lexical Planning in Sentence Production Is Highly Incremental: Evidence from ERPs.

    Directory of Open Access Journals (Sweden)

    Li-Ming Zhao

    Full Text Available The scope of lexical planning, which means how far ahead speakers plan lexically before they start producing an utterance, is an important issue for research into speech production, but remains highly controversial. The present research investigated this issue using the semantic blocking effect, which refers to the widely observed effects that participants take longer to say aloud the names of items in pictures when the pictures in a block of trials in an experiment depict items that belong to the same semantic category than different categories. As this effect is often interpreted as a reflection of difficulty in lexical selection, the current study took the semantic blocking effect and its associated pattern of event-related brain potentials (ERPs as a proxy to test whether lexical planning during sentence production extends beyond the first noun when a subject noun-phrase includes two nouns, such as "The chair and the boat are both red" and "The chair above the boat is red". The results showed a semantic blocking effect both in onset latencies and in ERPs during the utterance of the first noun of these complex noun-phrases but not for the second noun. The indication, therefore, is that the lexical planning scope does not encompass this second noun-phrase. Indeed, the present findings are in line with accounts that propose radically incremental lexical planning, in which speakers plan ahead only one word at a time. This study also provides a highly novel example of using ERPs to examine the production of long utterances, and it is hoped the present demonstration of the effectiveness of this approach inspires further application of ERP techniques in this area of research.

  11. Lexical Planning in Sentence Production Is Highly Incremental: Evidence from ERPs.

    Science.gov (United States)

    Zhao, Li-Ming; Yang, Yu-Fang

    2016-01-01

    The scope of lexical planning, which means how far ahead speakers plan lexically before they start producing an utterance, is an important issue for research into speech production, but remains highly controversial. The present research investigated this issue using the semantic blocking effect, which refers to the widely observed effects that participants take longer to say aloud the names of items in pictures when the pictures in a block of trials in an experiment depict items that belong to the same semantic category than different categories. As this effect is often interpreted as a reflection of difficulty in lexical selection, the current study took the semantic blocking effect and its associated pattern of event-related brain potentials (ERPs) as a proxy to test whether lexical planning during sentence production extends beyond the first noun when a subject noun-phrase includes two nouns, such as "The chair and the boat are both red" and "The chair above the boat is red". The results showed a semantic blocking effect both in onset latencies and in ERPs during the utterance of the first noun of these complex noun-phrases but not for the second noun. The indication, therefore, is that the lexical planning scope does not encompass this second noun-phrase. Indeed, the present findings are in line with accounts that propose radically incremental lexical planning, in which speakers plan ahead only one word at a time. This study also provides a highly novel example of using ERPs to examine the production of long utterances, and it is hoped the present demonstration of the effectiveness of this approach inspires further application of ERP techniques in this area of research.

  12. Applied Railway Optimization in Production Planning at DSB-S-tog - Tasks, Tools and Challenges

    DEFF Research Database (Denmark)

    Clausen, Jens

    2007-01-01

    Efficient public transportation is becoming increasingly vital for modern capitals. DSB S-tog a/s is the major supplier of rail traffic on the infrastructure of the city-rail network in Copenhagen. S-tog has experienced a demand for increasing volume and quality of the transportation offered....... In addition we describe on-going efforts in using mathematical models in activities such as timetable design and work-force planning. We also identify some organizatorial key factors, which have paved the way for extended use of optimization methods in railway production planning....

  13. Production planning and control for semiconductor wafer fabrication facilities modeling, analysis, and systems

    CERN Document Server

    Mönch, Lars; Mason, Scott J

    2012-01-01

    Over the last fifty-plus years, the increased complexity and speed of integrated circuits have radically changed our world. Today, semiconductor manufacturing is perhaps the most important segment of the global manufacturing sector. As the semiconductor industry has become more competitive, improving planning and control has become a key factor for business success. This book is devoted to production planning and control problems in semiconductor wafer fabrication facilities. It is the first book that takes a comprehensive look at the role of modeling, analysis, and related information systems

  14. AN APPROACH TO FINANCIAL RISK IN A PORTFOLIO FOR PLANNING THE INDUSTRIAL PRODUCTION OF PRODUCTS DERIVED FROM SUGARCANE

    Directory of Open Access Journals (Sweden)

    Thárcylla R.N. Clemente

    2015-12-01

    Full Text Available ABSTRACT Brazil's location and tropical weather conditions are favourable cultivating sugarcane, which has led to Brazil being one of the world's largest producers of sugarcane. The influence of the sugarcane industry on its economy stands out among the indicators of Brazilian economic growth and because the diversified investment when planning the production of products derived from this sector is encouraged. The decision on which derivative (for example, crystal sugar, anhydrous ethanol, or hydrous ethanol to produce from raw sugarcane can be modelled as an investment decision in a portfolio decision problem whenever a combination of these products is considered. As to the future price of these commodities, raw sugarcane is considered to be capital that should be invested. Thus, this paper puts forward a decision model which uses concepts from Decision Analysis and Bayesian Risk Analysis that may well assist the process of managing assets in the Brazilian sugarcane industry by considering the financial aspect when compiling a portfolio for planning production.

  15. Knowledge co-production and boundary work to promote implementation of conservation plans.

    Science.gov (United States)

    Nel, Jeanne L; Roux, Dirk J; Driver, Amanda; Hill, Liesl; Maherry, Ashton C; Snaddon, Kate; Petersen, Chantel R; Smith-Adao, Lindie B; Van Deventer, Heidi; Reyers, Belinda

    2016-02-01

    Knowledge co-production and boundary work offer planners a new frame for critically designing a social process that fosters collaborative implementation of resulting plans. Knowledge co-production involves stakeholders from diverse knowledge systems working iteratively toward common vision and action. Boundary work is a means of creating permeable knowledge boundaries that satisfy the needs of multiple social groups while guarding the functional integrity of contributing knowledge systems. Resulting products are boundary objects of mutual interest that maintain coherence across all knowledge boundaries. We examined how knowledge co-production and boundary work can bridge the gap between planning and implementation and promote cross-sectoral cooperation. We applied these concepts to well-established stages in regional conservation planning within a national scale conservation planning project aimed at identifying areas for conserving rivers and wetlands of South Africa and developing an institutional environment for promoting their conservation. Knowledge co-production occurred iteratively over 4 years in interactive stake-holder workshops that included co-development of national freshwater conservation goals and spatial data on freshwater biodiversity and local conservation feasibility; translation of goals into quantitative inputs that were used in Marxan to select draft priority conservation areas; review of draft priority areas; and packaging of resulting map products into an atlas and implementation manual to promote application of the priority area maps in 37 different decision-making contexts. Knowledge co-production stimulated dialogue and negotiation and built capacity for multi-scale implementation beyond the project. The resulting maps and information integrated diverse knowledge types of over 450 stakeholders and represented >1000 years of collective experience. The maps provided a consistent national source of information on priority conservation areas

  16. Optimization-based guidelines to retirement planning and pension product design

    DEFF Research Database (Denmark)

    Konicz Bell, Agnieszka Karolina

    Pension systems differ across countries and are subject to country specific regulations. In addition, various countries offer different types of pension plans to their citizens. In some pension plans individuals have a lot of flexibility regarding managing their savings; in others, pension funds...... or life insurers manage the members' savings without taking into account the individuals' preferences. Nevertheless, in most of the pension plans individuals face some challenges. They have to decide on the investment and consumption of their retirement savings either by choosing a pension provider...... and a specific pension product, or by choosing a particular annuity, and, possibly, a life insurance policy. In some countries they have to make decisions as soon as they are employed; in other countries, not until they approach the time of retirement. To help individuals make the right decisions regarding...

  17. Brazilian monitoring system of hydropower dams; Monitoramento hidrologico de reservatorios hidreletricos brasileiros

    Energy Technology Data Exchange (ETDEWEB)

    Silveira, Carlos Alexandre Cernach; Silva, Jose Jorge da; Rodrigues, Mauro Silvio; Moreira, Rodrigo de Matos; Coimbra, Roberto Moreira; Freitas, Marcos Aurelio Vasconcelos de [Agencia Nacional de Energia Eletrica (ANEEL), Brasilia, DF (Brazil). Superintendencia de Estudos e Informacoes Hidrologicas]. E-mail: cernach@aneel.gov.br; jorgej@aneel.gov.br; maurol@aneel.gov.br; rodrigom@aneel.gov.br; rcoimbra@aneel.gov.br; mfreitas@aneel.gov.br

    1999-07-01

    The Brazilian energetic sector goes by a deep restructuring process, reaching all the involved agents. Thus, the Federal Government, in December 26, 1996, instituted the National Agency of Electric Energy - ANEEL, through the Law nr. 9.427, to establish the regulation of the production, transmission, distribution and commercialization of electric energy service, and to guarantee electric services. To obtain consistent data in operation of the reservoirs that subsidize the decision related to the inspection activities, regulation and mediation and to guarantee the hydrologic information associated to hydroelectric enterprises, ANEEL published in December 4, 1998, the Resolution ANEEL nr. 396 in order to establish the conditions for implementation, maintenance and operation of hydrological stations. This paper shows the beginning of the implementation of the Brazilian Monitoring System of Hydropower Dams. (author)

  18. Compensation and Resettlement Policies after Compulsory Land Acquisition for Hydropower Development in Vietnam: Policy and Practice

    Directory of Open Access Journals (Sweden)

    Pham Huu Ty

    2013-11-01

    Full Text Available Under Vietnam’s State land ownership regime, the Government holds supreme authority over compulsory land acquisition. The results show that many improvements in land acquisition policies have been made, but poor implementation measures largely cannot prevent or even mitigate the adverse impacts on displaced persons. In particular, ineffective compensation measures and a lack of production land and livelihood alternatives accelerate the resistance of communities displaced as a result of hydropower development. The close alliance between the local government and the investor, which is considered as an “interest group”, is the main factor that leads to the ignorance of benefits of displaced people within the compulsory land acquisition process.

  19. The 'Lehn' small hydro-power station; KWKW Lehn Vorprojekt - Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Ruff, H.; Widmer, P.

    2009-02-15

    This illustrated final report for the Swiss Federal Office of Energy (SFOE) takes a look at the refurbishment of a small hydro-power station in the UNESCO biosphere region in the Entlebuch, Switzerland. The five grounds for the refurbishment are examined - repair of the water intake, flood protection, regulation of residual water, reduction of floating debris and sand and optimisation of the system by using automatic control. Figures on the cost of the refurbishment and electricity production are presented and discussed, as is the economic viability of the project. The existing installations are described and the hydrology of the stream is discussed, as are legal requirements and technical basics. Variants for the refurbishment are examined and operational aspects are looked at. A comprehensive appendix provides details on the proposal in graphical and tabular form.

  20. Effects of cognitive impairment on prosodic parameters of speech production planning in multiple sclerosis.

    Science.gov (United States)

    De Looze, Céline; Moreau, Noémie; Renié, Laurent; Kelly, Finnian; Ghio, Alain; Rico, Audrey; Audoin, Bertrand; Viallet, François; Pelletier, Jean; Petrone, Caterina

    2017-05-24

    Cognitive impairment (CI) affects 40-65% of patients with multiple sclerosis (MS). CI can have a negative impact on a patient's everyday activities, such as engaging in conversations. Speech production planning ability is crucial for successful verbal interactions and thus for preserving social and occupational skills. This study investigates the effect of cognitive-linguistic demand and CI on speech production planning in MS, as reflected in speech prosody. A secondary aim is to explore the clinical potential of prosodic features for the prediction of an individual's cognitive status in MS. A total of 45 subjects, that is 22 healthy controls (HC) and 23 patients in early stages of relapsing-remitting MS, underwent neuropsychological tests probing specific cognitive processes involved in speech production planning. All subjects also performed a read speech task, in which they had to read isolated sentences manipulated as for phonological length. Results show that the speech of MS patients with CI is mainly affected at the temporal level (articulation and speech rate, pause duration). Regression analyses further indicate that rate measures are correlated with working memory scores. In addition, linear discriminant analysis shows the ROC AUC of identifying MS patients with CI is 0.70 (95% confidence interval: 0.68-0.73). Our findings indicate that prosodic planning is deficient in patients with MS-CI and that the scope of planning depends on patients' cognitive abilities. We discuss how speech-based approaches could be used as an ecological method for the assessment and monitoring of CI in MS. © 2017 The British Psychological Society.

  1. Evaluating and optimizing the operation of the hydropower system in the Upper Yellow River: A general LINGO-based integrated framework

    Science.gov (United States)

    Si, Yuan; Liu, Ronghua; Wei, Jiahua; Huang, Yuefei; Li, Tiejian; Liu, Jiahong; Gu, Shenglong; Wang, Guangqian

    2018-01-01

    The hydropower system in the Upper Yellow River (UYR), one of the largest hydropower bases in China, plays a vital role in the energy structure of the Qinghai Power Grid. Due to management difficulties, there is still considerable room for improvement in the joint operation of this system. This paper presents a general LINGO-based integrated framework to study the operation of the UYR hydropower system. The framework is easy to use for operators with little experience in mathematical modeling, takes full advantage of LINGO’s capabilities (such as its solving capacity and multi-threading ability), and packs its three layers (the user layer, the coordination layer, and the base layer) together into an integrated solution that is robust and efficient and represents an effective tool for data/scenario management and analysis. The framework is general and can be easily transferred to other hydropower systems with minimal effort, and it can be extended as the base layer is enriched. The multi-objective model that represents the trade-off between power quantity (i.e., maximum energy production) and power reliability (i.e., firm output) of hydropower operation has been formulated. With equivalent transformations, the optimization problem can be solved by the nonlinear programming (NLP) solvers embedded in the LINGO software, such as the General Solver, the Multi-start Solver, and the Global Solver. Both simulation and optimization are performed to verify the model’s accuracy and to evaluate the operation of the UYR hydropower system. A total of 13 hydropower plants currently in operation are involved, including two pivotal storage reservoirs on the Yellow River, which are the Longyangxia Reservoir and the Liujiaxia Reservoir. Historical hydrological data from multiple years (2000–2010) are provided as input to the model for analysis. The results are as follows. 1) Assuming that the reservoirs are all in operation (in fact, some reservoirs were not operational or did

  2. Evaluating and optimizing the operation of the hydropower system in the Upper Yellow River: A general LINGO-based integrated framework.

    Directory of Open Access Journals (Sweden)

    Yuan Si

    Full Text Available The hydropower system in the Upper Yellow River (UYR, one of the largest hydropower bases in China, plays a vital role in the energy structure of the Qinghai Power Grid. Due to management difficulties, there is still considerable room for improvement in the joint operation of this system. This paper presents a general LINGO-based integrated framework to study the operation of the UYR hydropower system. The framework is easy to use for operators with little experience in mathematical modeling, takes full advantage of LINGO's capabilities (such as its solving capacity and multi-threading ability, and packs its three layers (the user layer, the coordination layer, and the base layer together into an integrated solution that is robust and efficient and represents an effective tool for data/scenario management and analysis. The framework is general and can be easily transferred to other hydropower systems with minimal effort, and it can be extended as the base layer is enriched. The multi-objective model that represents the trade-off between power quantity (i.e., maximum energy production and power reliability (i.e., firm output of hydropower operation has been formulated. With equivalent transformations, the optimization problem can be solved by the nonlinear programming (NLP solvers embedded in the LINGO software, such as the General Solver, the Multi-start Solver, and the Global Solver. Both simulation and optimization are performed to verify the model's accuracy and to evaluate the operation of the UYR hydropower system. A total of 13 hydropower plants currently in operation are involved, including two pivotal storage reservoirs on the Yellow River, which are the Longyangxia Reservoir and the Liujiaxia Reservoir. Historical hydrological data from multiple years (2000-2010 are provided as input to the model for analysis. The results are as follows. 1 Assuming that the reservoirs are all in operation (in fact, some reservoirs were not operational

  3. Hood River Production Program : Hood River Fish Habitat Protection, Restoration, and Monitoring Plan.

    Energy Technology Data Exchange (ETDEWEB)

    Coccoli, Holly; Lambert, Michael

    2000-02-01

    Effective habitat protection and rehabilitation are essential to the long-term recovery of anadromous fish populations in the Hood River subbasin. This Habitat Protection, Restoration, and Monitoring Plan was prepared to advance the goals of the Hood River Production Program (HRRP) which include restoring self-sustaining runs of spring chinook salmon and winter and summer steelhead. The HRPP is a fish supplementation and monitoring and evaluation program initiated in 1991 and funded by the Bonneville Power Administration (BPA) as part of the Northwest Power Planning Council Fish and Wildlife Program. The HRPP is a joint effort of the Confederated Tribes of the Warm Springs Reservation of Oregon (CTWSRO) and Oregon Department of Fish and Wildlife (ODFW). Using recent watershed assessment and federal watershed analysis reports, this Plan reviews the historic and current condition of riparian, instream and upland habitats; natural watershed processes; anadromous and resident fish populations; identifies limiting factors, and indicates those subbasin areas that need protection or are likely to respond to restoration. Primary habitat restoration needs were identified as (1) improved fish screening and upstream adult passage at water diversions; (2) improved spawning gravel availability, instream habitat structure and diversity; and (3) improved water quality and riparian conditions. While several early action projects have been initiated in the Hood River subbasin since the mid 1990s, this Plan outlines additional projects and strategies needed to protect existing high quality habitat, correct known fish survival problems, and improve the habitat capacity for natural production to meet HRPP goals.

  4. Inspection logistics planning for multi-stage production systems with applications to semiconductor fabrication lines

    Science.gov (United States)

    Chen, Kyle Dakai

    Since the market for semiconductor products has become more lucrative and competitive, research into improving yields for semiconductor fabrication lines has lately received a tremendous amount of attention. One of the most critical tasks in achieving such yield improvements is to plan the in-line inspection sampling efficiently so that any potential yield problems can be detected early and eliminated quickly. We formulate a multi-stage inspection planning model based on configurations in actual semiconductor fabrication lines, specifically taking into account both the capacity constraint and the congestion effects at the inspection station. We propose a new mixed First-Come-First-Serve (FCFS) and Last-Come-First-Serve (LCFS) discipline for serving the inspection samples to expedite the detection of potential yield problems. Employing this mixed FCFS and LCFS discipline, we derive approximate expressions for the queueing delays in yield problem detection time and develop near-optimal algorithms to obtain the inspection logistics planning policies. We also investigate the queueing performance with this mixed type of service discipline under different assumptions and configurations. In addition, we conduct numerical tests and generate managerial insights based on input data from actual semiconductor fabrication lines. To the best of our knowledge, this research is novel in developing, for the first time in the literature, near-optimal results for inspection logistics planning in multi-stage production systems with congestion effects explicitly considered.

  5. Optimization of production planning in Czech agricultural co-operative via linear programming

    Directory of Open Access Journals (Sweden)

    Jitka Janová

    2009-01-01

    Full Text Available The production planning is one of the key managerial decisions in agricultural business, which must be done periodically every year. Correct decision must cover the agriculture demands of planting the crops such as crop rotation restrictions or water resource scarcity, while the decision maker aims to plan the crop design in most profitable way in sense of maximizing the total profit from the crop yield. This decision problem represents the optimization of crop design and can be treated by the me­thods of linear programming which begun to be extensively used in agriculture production planning in USA during 50’s. There is ongoing research of mathematical programming applications in agriculture worldwide, but the results are not easily transferable to other localities due to the specific local restrictions in each country. In Czech Republic the farmers use for production planning mainly their expert knowledge and past experience. However, the mathematical programming approach enables find the true optimal solution of the problem, which especially in the problems with a great number of constraints is not easy to find intuitively. One of the possible barriers for using the general decision support systems (which are based on mathematical programming methods for agriculture production planning in Czech Republic is its expensiveness. The small farmer can not afford to buy the expensive software or to employ a mathematical programming specialist. The aim of this paper is to present a user friendly linear programming model of the typical agricultural production planning problem in Czech Republic which can be solved via software tools commonly available in any farm (e.g. EXCEL. The linear programming model covering the restrictions on total costs, crop rotation, thresholds for the total area sowed by particular crops, total amount of manure and the need of feed crops is developed. The model is applied in real-world problem of Czech agriculture

  6. Model experiments for the extension of the pumped storage hydropower plant of Vianden in Luxembourg; Wasserbauliche Modelluntersuchungen zur Erweiterung des Pumpspeicherkraftwerks Vianden in Luxemburg

    Energy Technology Data Exchange (ETDEWEB)

    Mohringer, Thomas; Seidel, Frank; Lehmann, Boris; Nestmann, Franz [Karlsruhe Univ. (DE). Inst. fuer Wasser und Gewaesserentwicklung (IWG)

    2009-07-01

    The pumped storage hydropower plant of Vianden in Luxembourg is considered to be one of Europe's most powerful hydropower plants. Due to the extension of the plant by an additional pump-turbine the Institute of Water and River Basin Management at the Universitaet Karlsruhe (TH) was charged to run hydraulic model investigations. Fields of interest have been: the optimisation of the hydraulic shape of the new intake-outlet structure, the sediment settlement behaviour and the hydraulic conditions near the intake-outlet structure. Further a smooth operation of the plant's existing parts during construction could be guaranteed. The model experiments have brought planning reliability regarding the hydraulic function of the new structures. (orig.)

  7. The social organization of agricultural biogas production and use

    NARCIS (Netherlands)

    Bluemling, B.; Mol, A.P.J.; Tu, Q.

    2013-01-01

    While for wind, solar energy or hydropower, energy supply happens directly from the source to the wind wheels, hydropower turbines or solar panels, in the case of biogas, energy production cannot directly take from the energy source, organic matter, but depends on the institutional structures and

  8. Yakima/Klickitat Production Project Preliminary Design Report, Appendix A: Refined Project Goals and Harvest Managment Plan : Experimental Design Plan : Genetic Risk Assessment.

    Energy Technology Data Exchange (ETDEWEB)

    Yakima Indian Nation; Pacific Northwest Laboratory; Washington Department of Fisheries

    1990-03-01

    The purpose of the project as stated by the Northwest Power Planning Council is 'to test the assumption that new artificial production in the Yakima and Klickitat subbasins can be used to increase harvest and enhance natural production while maintaining genetic resources.'

  9. Production Planning Under Yield and Demand Uncertainty with Yield-Dependent Cost and Price

    OpenAIRE

    Burak Kazaz

    2004-01-01

    This paper studies production planning with random yield and demand. It is a departure from previous studies of random yield in that it defines the sale price and the purchasing cost as exogenous and increasing with decreasing yield. While this behavior can be observed in various industries (e.g., citrus), the paper focuses on the olive oil industry as its application. Production of olive oil is a challenging business as olives grow every other year; thus, a risky investment is involved. A ne...

  10. Strategic planning as a competitive differential: A case study of the Sealed Sources Production Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Vieira, Imário; Nascimento, Fernando C.; Calvo, Wilson A. Parejo, E-mail: imariovieira@yahoo.com, E-mail: wapcalvo@ipen.br, E-mail: fcodelo@gmail.com [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Faculdade SENAI de Tecnologia Ambiental, Sao Bernardo do Campo, SP (Brazil)

    2017-11-01

    Strategic planning has always been and continues to be one of the most important management tools for decision making. Amidst the uncertainties of the 21{sup st} century, public, private and third sector organizations are steadily struggling to improve their strategic plans by using more effective results management tools such as BSC-Balanced Scorecard. Nuclear research institutes and research centers around the world have been using more and more these types of tools in their strategic planning and management. The objective of this article was to recommend the use the BSC as a strategic tool for decision making for the Sealed Sources Production Laboratory located in the Radiation Technology Center, at Nuclear and Energy Research Institute (IPEN/CNEN-SP), in Sao Paulo, Brazil. The methodology used in this academic article was a case study, which considered the object of the study, the Sealed Sources Production Laboratory, from January 2014 to August 2016. Among the main results obtained with this study can be cited: the improvement of the information flow, the visualization and proposition to change the periodicity of analysis of the results, among others. In view of the expected results, it was possible to conclude that this study may be of value to the Sealed Sources Production Laboratory for Industrial Radiography and Industrial Process Control and also to other research centers, as it will allow and contribute with an additional management support tool. (author)

  11. IAG JWG 4.3.8: GNSS tropospheric products for Climate: Objectives and Future Plans

    Science.gov (United States)

    Pacione, Rosa; Pottiaux, Eric

    2017-04-01

    The Joint Working Group 'GNSS tropospheric products for Climate' is part of the IAG Sub-Commission 4.3 'Atmosphere Remote Sensing', which is embedded in the IAG Commission 4 'Positioning and Applications'. The main objective of the working group is to assess existing reprocessed GNSS tropospheric products, foster the development of forthcoming reprocessing activities, review and update GNSS-based product requirements and exchange format for climate and promote their use for climate research, including a possible data assimilation of GNSS troposphere products in climate models. We will describe the Term of Reference and Objectives of the Working Group. For each objective, a report of the state of the art along with its future plans will be given.

  12. JOINT OPTIMIZATION OF PRODUCTION PLANNING AND VEHICLE ROUTING PROBLEMS: A REVIEW OF EXISTING STRATEGIES

    Directory of Open Access Journals (Sweden)

    Marc Reimann

    2014-05-01

    Full Text Available Keen competition and increasingly demanding customers have forced companies to use their resources more efficiently and to integrate production and transportation planning. In the last few years more and more researchers have also focused on this challenging problem by trying to determine the complexity of the individual problems and then developing fast and robust algorithms to solve them. This paper reviews existing literature on integrated production and distribution decisions at the tactical and operational level, where the distribution part is modelled as some variation of the well-known Vehicle Routing Problem (VRP. The focus is thereby on problems that explicitly consider deliveries to multiple clients in a less-than-truckload fashion. In terms of the production decisions we distinguish in our review between tactical and operational production problems by considering lot-sizing/capacity allocation and scheduling models, respectively.

  13. Integrating hydropower and intermittent climate-related renewable energies: a call for hydrology

    Science.gov (United States)

    Francois, Baptiste; Anquetin, Sandrine; Creutin, Jean-Dominique; Engeland, Kolbjorn; Favre, Anne-Catherine; Hingray, Benoit; Ramos, Maria-Helena; Raynaud, Damien; Renard, Benjamin; Sauquet, Eric; Sauterleute, Julian-Friedrich; Vidal, Jean-Philippe; Warland, Geir

    2014-05-01

    Currently, the debate about the role of hydropower as energy storage and balancing energy source in context of high intermittency and variability of solar and wind energy exposes hydrologists to new challenges. There is a common consensus that a high penetration of wind and solar energies can only be achieved if the issues to their intermittent power outputs are solved - issues which can be at least partially approached by means of hydropower systems. Indeed, unlike wind and solar energies which are only produced when wind and sun are available, hydro resources can be stored in reservoirs for later use. Finally, the energy production should balance the energy demand which is to a large degree, controlled by weather variables, especially temperature. However, despite substantial work on the space-time variability of each individual hydro-meteorological variable, advances on the joint analysis of the processes that are underlying this integration are more limited. In this commentary, we analyze three specific challenges dedicated to the hydrological community. They aim to improve the integration of hydropower with solar and wind energy sources to make more effective the use of renewable energy and water resources. These challenges are: i) the need to provide a new hydro-meteorological framework for the analysis of the space-time co-fluctuations between runoff regimes and solar, wind and temperature variables; ii) understanding how processes like land-use and climate change affect the nature of these co-fluctuations; and iii) the need to develop means for a quantitative analysis of interactions between the use of water for power generation and other water uses including the preservation of aquatic ecosystems. In some way, the success of climate change mitigation policies based on high intermittent energy integration will depend on how these different challenges have been achieved by hydrologist community. The work presented is part of the FP7 project COMPLEX

  14. 77 FR 51551 - Proposed Renewal of Information Collection: Alternatives Process in Hydropower Licensing

    Science.gov (United States)

    2012-08-24

    ... Office of the Secretary Proposed Renewal of Information Collection: Alternatives Process in Hydropower..., Department of the Interior is announcing its intention to request renewal approval for the collection of information for Alternatives Process in Hydropower Licensing. This collection request has been forwarded to...

  15. 77 FR 30308 - Proposed Renewal of Information Collection: Alternatives Process in Hydropower Licensing

    Science.gov (United States)

    2012-05-22

    ... Office of the Secretary Proposed Renewal of Information Collection: Alternatives Process in Hydropower... Process in Hydropower Licensing, OMB Control Number 1094-0001. FOR FURTHER INFORMATION CONTACT: To request... mail to [email protected] . SUPPLEMENTARY INFORMATION: I. Abstract This notice is for renewal of...

  16. 75 FR 7469 - Panel Member List for Hydropower Licensing Study Dispute Resolution; Notice Extending Filing Date...

    Science.gov (United States)

    2010-02-19

    ... Energy Regulatory Commission Panel Member List for Hydropower Licensing Study Dispute Resolution; Notice Extending Filing Date for Applications for Panel Member List for Hydropower Licensing Study Dispute...) requested applications to be included on a list of resource experts willing to serve as a third panel member...

  17. "Fish Friendly" Hydropower Turbine Development and Deployment. Alden Turbine Preliminary Engineering and Model Testing

    Energy Technology Data Exchange (ETDEWEB)

    Dixon, D. [Electric Power Research Institute, Palo Alto, CA (United States)

    2011-10-01

    This report presents the results of a collaborative research project funded by the Electric Power Research Institute (EPRI), the U.S. Department of Energy (DOE), and hydropower industry partners with the objective of completing the remaining developmental engineering required for a “fish-friendly” hydropower turbine called the Alden turbine.

  18. Multi-model assessment of global hydropower and cooling water discharge potential under climate change

    NARCIS (Netherlands)

    Vliet, van M.T.H.; Beek, van L.P.H.; Eisner, S.; Flörke, M.; Wada, Y.; Bierkens, M.F.P.

    2016-01-01

    Worldwide, 98% of total electricity is currently produced by thermoelectric power and hydropower. Climate change is expected to directly impact electricity supply, in terms of both water availability for hydropower generation and cooling water usage for thermoelectric power. Improved

  19. High-resolution assessment of global technical and economic hydropower potential

    NARCIS (Netherlands)

    Gernaat, David E.H.J.; Bogaart, Patrick W.; Vuuren, van Detlef P.; Biemans, Hester; Niessink, Robin

    2017-01-01

    Hydropower is the most important renewable energy source to date, providing over 72% of all renewable electricity globally. Yet, only limited information is available on the global potential supply of hydropower and the associated costs. Here we provide a high-resolution assessment of the technical

  20. High-Resolution Free-GIS operations to assist hydropower potential assessment

    Science.gov (United States)

    Ganora, Daniele; Gallo, Enrico; Masoero, Alessandro; Laio, Francesco; Claps, Pierluigi

    2013-04-01

    Even in regions with mature hydropower development, needs for renewable energy suggest to revise plans of exploitation of water resources, according to EU and national environmental regulations. High resolution hydrological analysis is then needed to comply with the effects of existing hydropower plants and of other water withdrawals. Flow duration curves (FDC) are the tool usually adopted to represent water availability and variability for hydropower purposes. For this study, developed within the RENERFOR-ALCOTRA Project, a regional "spatially smooth" model has been developed for FDC estimation: the procedure adopted relates the L-moments of the FDC to several geomorphoclimatic parameters (more than 100), with the purpose to directly reconstruct a "naturalized" FDC. The proposed procedure is systematically extended to all the gauged basins located in Northwestern Italy, which is an area characterized by the presence of a large number of dams. For each basin, the annual average FDC is computed, its L-moments are calculated and corrected using a simplified model that takes into account the effect of upstream reservoirs and power plants. Then, each corrected L-moment is regionalized using multiple regressions techniques, allowing one to reconstruct the L-moments at any ungauged basin. Finally, the "naturalized" FDC is reconstructed at the ungauged site on the basis of the predicted L-moments. Due to necessity of obtaining high-resolution estimates, the method has been designed to keep the estimates of mean annual runoff congruent in the confluences. This feature is obtained considering only raster-summable explanatory variables, which are only a subset of the available descriptors. The residual hydropower potential is evaluated by mapping the mean naturalized flow estimated for each pixel of a DEM-derived river network raster model in two mountain basins used as case studies. Applying extensively the proposed methodology, the mean annual flow is reconstructed not

  1. Production Optimization for Plan of Gas Field Development Using Marginal Cost Analysis

    Directory of Open Access Journals (Sweden)

    Suprapto Soemardan

    2013-09-01

    Full Text Available Gas production rate is one of the most important variables affecting the feasibility plan of gas field development. It take into account reservoir characteristics, gas reserves, number of wells, production facilities, government take and market conditions. In this research, a mathematical  model of gas production optimization  has been developed using  marginal cost  analysis  in  determining  the  optimum  gas  production  rate  for  economic  profit,  by employing  the  case  study  of Matindok  Field.  The  results  show  that  the  optimum  gas  production  rate  is  mainly  affected  by  gas  price  duration  and time of gas delivery. When the price of gas  increases, the optimum  gas production rate  will increase, and then it  will become closer to the maximum production rate of the reservoir. Increasing the duration time of gas delivery will reduce the optimum gas production rate and increase maximum profit non-linearly.

  2. Production of rotational parts in small-series and computer-aided planning of its production engineering

    Science.gov (United States)

    Dudas, Illes; Berta, Miklos; Cser, Istvan

    1998-12-01

    Up-to-date manufacturing equipments of production of rotational parts in small series are lathe-centers and CNC grinding machines with high concentration of manufacturing operations. By the use of these machine tools it can be produced parts with requirements of increased accuracy and surface quality. In the lathe centers, which contain the manufacturing procedures of lathes using stationary tools and of drilling-milling machine tools using rotational tools, non-rotational surfaces of rotational parts can also be produced. The high concentration of manufacturing operations makes necessary the planning and programing of the measuring, monitoring and quality control into the technological process during manufacturing operation. In this way, taking into consideration the technological possibilities of lathe canters, the scope of computer aided technological planning duties significantly increases. It is trivial requirement to give only once the descriptions of the prefabricated parts and ready made parts. Starting taking into account these careful considerations we have been developing the planning system of technology of body of revolution on the base of GTIPROG/EC system which useful for programming of lathe centers. Out paper deals with the results of development and the occurring problems.

  3. Interactions between land use, climate and hydropower in Scotland

    Science.gov (United States)

    Sample, James

    2015-04-01

    To promote the transition towards a low carbon economy, the Scottish Government has adopted ambitious energy targets, including generating all electricity from renewable sources by 2020. To achieve this, continued investment will be required across a range of sustainable technologies. Hydropower has a long history in Scotland and the present-day operational capacity of ~1.5 GW makes a substantial contribution to the national energy budget. In addition, there remains potential for ~500 MW of further development, mostly in the form of small to medium size run-of-river schemes. Climate change is expected to lead to an intensification of the global hydrological cycle, leading to changes in both the magnitude and seasonality of river flows. There may also be indirect effects, such as changing land use, enhanced evapotranspiration rates and an increased demand for irrigation, all of which could affect the water available for energy generation. Preliminary assessments of hydropower commonly use flow duration curves (FDCs) to estimate the power generation potential at proposed new sites. In this study, we use spatially distributed modelling to generate daily and monthly FDCs on a 1 km by 1 km grid across Scotland, using a variety of future land use and climate change scenarios. Parameter-related uncertainty in the model has been constrained using Bayesian Markov Chain Monte Carlo (MCMC) techniques to derive posterior probability distributions for key model parameters. Our results give an indication of the sensitivity and vulnerability of Scotland's run-of-river hydropower resources to possible changes in climate and land use. The effects are spatially variable and the range of uncertainty is sometimes large, but consistent patterns do emerge. For example, many locations are predicted to experience enhanced seasonality, with significantly lower power generation potential in the summer months and greater potential during the autumn and winter. Some sites may require

  4. Assessment of the Effects of Climate Change on Federal Hydropower

    Energy Technology Data Exchange (ETDEWEB)

    Sale, Michael J. [M.J. Sale and Associates, Hanson, MA (United States); Shih-Chieh, Kao [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Ashfaq, Moetasim [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Kaiser, Dale P. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Martinez, Rocio [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Webb, Cindy [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Wei, Yaxing [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2012-10-01

    As directed by Congress in Section 9505 of the SECURE Water Act of 2009 (Public Law 111-11), the US Department of Energy (DOE), in consultation with the federal Power Marketing Administrations (PMAs) and other federal agencies, including federal dam owners, has prepared a comprehensive assessment examining the effects of climate change on water available for hydropower at federal facilities and on the marketing of power from these federal facilities. This Oak Ridge National Laboratory report, referred to as the “9505 Assessment,” describes the technical basis for the report to Congress that was called for in the SECURE Water Act.

  5. DOE Hydropower Program Annual Report for FY 2003

    Energy Technology Data Exchange (ETDEWEB)

    Cada, Glenn F. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Carlson, Thomas J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Dauble, Dennis D. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Hunt, Richard T. [Idaho National Lab. (INL), Idaho Falls, ID (United States). Idaho National Engineering and Environmental Lab. (INEEL); Sale, Michael J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Sommers, Garold L. [Idaho National Lab. (INL), Idaho Falls, ID (United States). Idaho National Engineering and Environmental Lab. (INEEL)

    2004-02-01

    This report describes the progress of the R&D conducted in FY 2003 the under four program areas at the time: (1) Advanced Hydropower Technology (Large Turbine Field Testing, Testing of the Alden/NREC pilot scale runner, and Improved Mitigation Practices); (2) Supporting Research and Testing (Biological Design Criteria, Computer and Physical Modeling, Instrumentation and Controls, and Environmental Analysis); (3) Systems Integration and Technology Acceptance (Wind/Hydro Integration Studies and Technical Support and Outreach); and (4) Engineering and Analysis (Innovative Technology Characterization).

  6. Decision making algorithms for hydro-power plant location

    CERN Document Server

    Majumder, Mrinmoy

    2013-01-01

    The present study has attempted to apply the advantage of neuro-genetic algorithms for optimal decision making in maximum utilization of natural resources. Hydro-power is one of the inexpensive, but a reliable source of alternative energy which is foreseen as the possible answer to the present crisis in the energy sector. However, the major problem related to hydro-energy is its dependency on location. An ideal location can produce maximum energy with minimum loss. Besides, such power-plant also requires substantial amount of land which is a precious resource nowadays due to the rapid and unco

  7. Effects of Climate Change on Federal Hydropower. Report to Congress

    Energy Technology Data Exchange (ETDEWEB)

    None

    2013-08-01

    This is a formal Department of Energy report to Congress. It outlines the findings of an assessment directed by Congress in Section 9505 of the SECURE Water Act of 2009 (Public Law 111-11), the US Department of Energy (DOE), in consultation with the federal Power Marketing Administrations (PMAs) and other federal agencies, including federal dam owners, has prepared a comprehensive assessment examining the effects of climate change on water available for hydropower at federal facilities and on the marketing of power from these federal facilities.

  8. DOE Hydropower Program biennial report 1996-1997 (with an updated annotated bibliography)

    Energy Technology Data Exchange (ETDEWEB)

    Rinehart, B.N.; Francfort, J.E.; Sommers, G.L. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States); Cada, G.F.; Sale, M.J. [Oak Ridge National Lab., TN (United States)

    1997-06-01

    This report, the latest in a series of biennial Hydropower Program reports sponsored by the US Department of Energy, summarizes the research and development and technology transfer activities of fiscal years 1996 and 1997. The report discusses the activities in the six areas of the hydropower program: advanced hydropower turbine systems; environmental research; hydropower research and development; renewable Indian energy resources; resource assessment; and technology transfer. The report also includes an annotated bibliography of reports pertinent to hydropower, written by the staff of the Idaho National Engineering and Environmental Laboratory, Oak Ridge National Laboratory, Federal and state agencies, cities, metropolitan water districts, irrigation companies, and public and independent utilities. Most reports are available from the National Technical Information Service.

  9. Frequency Stability of Hierarchically Controlled Hybrid Photovoltaic-Battery-Hydropower Microgrids

    DEFF Research Database (Denmark)

    Guan, Yajuan; Quintero, Juan Carlos Vasquez; Guerrero, Josep M.

    2015-01-01

    is derived to analyze the system stability of the hybrid microgrid. The simulation results show system frequency and voltage stability for a hybrid microgrid demonstration which includes 2 MWp PV installations, a 15.2 MWh battery system, and a 12.8 MVA hydropower plant. Experimental results on a small......Hybrid photovoltaic (PV) -battery-hydropower microgrids can be considered to enhance electricity accessibility and availability in remote areas. However, the coexistence of different renewable energy sources with different inertias and control strategies may affect system stability. In this paper......, a hierarchical controller for hybrid PV-battery-hydropower microgrid is proposed in order to achieve the parallel operation of hydropower and PV-battery system with different rates, and to guarantee power sharing performance among PV voltage controlled inverters, while the required power to hydropower...

  10. Automated Planning of Science Products Based on Nadir Overflights and Alerts for Onboard and Ground Processing

    Science.gov (United States)

    Chien, Steve A.; McLaren, David A.; Rabideau, Gregg R.; Mandl, Daniel; Hengemihle, Jerry

    2013-01-01

    A set of automated planning algorithms is the current operations baseline approach for the Intelligent Payload Module (IPM) of the proposed Hyper spectral Infrared Imager (HyspIRI) mission. For this operations concept, there are only local (e.g. non-depletable) operations constraints, such as real-time downlink and onboard memory, and the forward sweeping algorithm is optimal for determining which science products should be generated onboard and on ground based on geographical overflights, science priorities, alerts, requests, and onboard and ground processing constraints. This automated planning approach was developed for the HyspIRI IPM concept. The HyspIRI IPM is proposed to use an X-band Direct Broadcast (DB) capability that would enable data to be delivered to ground stations virtually as it is acquired. However, the HyspIRI VSWIR and TIR instruments will produce approximately 1 Gbps data, while the DB capability is 15 Mbps for a approx. =60X oversubscription. In order to address this mismatch, this innovation determines which data to downlink based on both the type of surface the spacecraft is overflying, and the onboard processing of data to detect events. For example, when the spacecraft is overflying Polar Regions, it might downlink a snow/ice product. Additionally, the onboard software will search for thermal signatures indicative of a volcanic event or wild fire and downlink summary information (extent, spectra) when detected, thereby reducing data volume. The planning system described above automatically generated the IPM mission plan based on requested products, the overflight regions, and available resources.

  11. The Products of Research on Spatial Planning and Urban Development. An inquiry into the recent Italian planning literature.

    Directory of Open Access Journals (Sweden)

    Bruno Zanon

    2014-02-01

    Full Text Available In Italy, recent University reforms, a research quality assessment exercise, and the selection of academics by means of innovative procedures are all accelerating the discussion on the specificity ofresearch on spatial planning and urban design. One first step was a discussion on the quality of the journals in which planners and urban designers customarily publish, but there is an urgent need for a more general debate on what kind of research is expected to be developed, and what ‘research products’ must be delivered. This also relates to the structure itself of the discipline (such as its focus, and the specific methods used, the way academics are trained (Ph.D. programmes, inparticular, how they participate in the national and international debate, as well as how they are selected, the way research is supported financially, and finally, the connections between scholarship and practical (including professional activities. Following a review of the international debate on which an analytical framework has been developed, this paper analyses what is considered by Italian academia to be ‘research product’, on the basis of articles published in key Italian journals. The goal is not to pass judgment on each contribution, but to develop a classification of content, methods and results of what is put forward as – or should be – the product of research.

  12. Hybrid production planning system in make-to-order company - case study

    Directory of Open Access Journals (Sweden)

    2010-12-01

    Full Text Available This paper presents hybrid production planning and shop floor control system in make-to-order manufacturing of complex products. It presents the general idea of multi-hybrid system and selected practical aspects of its creation and its implementation. The construction of this system is based on the planning and executive levels and main aspects of its integration and its support tools. The research was carried out in HCP S.A. Poznan (Diesel Engines and Generating Sets Factory. HCP S.A. Poznan is the producer of high-power marine engines. The lead-time of the final product manufacturing is between 9 months and 1 year, and takes about 40.000 hours per one engine. The main problems of this production system are high share of the work in progress and long lead-time, which, as a result, causes many expenses. The flow of material streams is extremely complex and represents "A-plant" class, according to V-A-T classification, including significant internal constraints ("bottlenecks".

  13. Proposal for a strategic planning for the replacement of products in stores based on sales forecast

    Directory of Open Access Journals (Sweden)

    Cassius Tadeu Scarpin

    2011-08-01

    Full Text Available This paper presents a proposal for strategic planning for the replacement of products in stores of a supermarket network. A quantitative method for forecasting time series is used for this, the Artificial Radial Basis Neural Networks (RBFs, and also a qualitative method to interpret the forecasting results and establish limits for each product stock for each store in the network. The purpose with this strategic planning is to reduce the levels of out-of-stock products (lack of products on the shelves, as well as not to produce overstocking, in addition to increase the level of logistics service to customers. The results were highly satisfactory reducing the Distribution Center (DC to shop out-of-stock levels, in average, from 12% to about 0.7% in hypermarkets and from 15% to about 1.7% in supermarkets, thereby generating numerous competitive advantages for the company. The use of RBFs for forecasting proved to be efficient when used in conjunction with the replacement strategy proposed in this work, making effective the operational processes.

  14. Planned Distribution Center for Cerdo Real Meat Products in District IV-Batangas Province, Philippines

    Directory of Open Access Journals (Sweden)

    Aile T. Amorado

    2015-11-01

    Full Text Available This study aimed to determine the optimal location for BUKLOD-UNLAD Multi-purpose Cooperative (BUKLOD’s CERDO Real Meat products distribution centers and to identify the market condition once the optimal location was identified. The said cooperative from Dagatan, a barangay of Taysan, Batangas, Philippines identified the need to create distribution center specifically in District IV of Batangas Province due to the growing demand for their real meat products in the area. Hence to address this need, a study to identify for its optimal location was requested by BUKLOD from the researchers. First, interviews with the management and members of the cooperative were done by the researchers to identify the requirements in establishing a distribution center. In the same way, consultations with the 7 municipalities of District IV were piloted to inform them accordingly about the said project. Moreover the researchers also referred to the Comprehensive Land Used Plan 2012-2022 of each municipality provided by the Provincial Planning and Development Office along with geographical maps gathered from the Provincial Engineers Office to acquire specific data on locations of the involved municipalities. Through various facility planning tools such as Factor Rating Method, Analytical Hierarchy Process and Center of Gravity, the researchers identified Rosario, Batangas as the best location for establishing the distribution center. After a market study was conducted, the researchers further proved the viability of establishing BUKLOD’s CERDO’s products’ distribution center in the area.

  15. Multiobjective Joint Optimization of Production Scheduling and Maintenance Planning in the Flexible Job-Shop Problem

    Directory of Open Access Journals (Sweden)

    Jianfei Ye

    2015-01-01

    Full Text Available In order to solve the joint optimization of production scheduling and maintenance planning problem in the flexible job-shop, a multiobjective joint optimization model considering the maximum completion time and maintenance costs per unit time is established based on the concept of flexible job-shop and preventive maintenance. A weighted sum method is adopted to eliminate the index dimension. In addition, a double-coded genetic algorithm is designed according to the problem characteristics. The best result under the circumstances of joint decision-making is obtained through multiple simulation experiments, which proves the validity of the algorithm. We can prove the superiority of joint optimization model by comparing the result of joint decision-making project with the result of independent decision-making project under fixed preventive maintenance period. This study will enrich and expand the theoretical framework and analytical methods of this problem; it provides a scientific decision analysis method for enterprise to make production plan and maintenance plan.

  16. Draft safety review plan for accelerator production of tritium (APT) project

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-07-01

    The purpose of this ``living`` Safety Review Plan (SRP) is to describe the products and processes that will be followed to conduct a systematic review of the Accelerator Production of Tritium (APT) Facility Preliminary Safety Analysis Report (PSAR), and subsequently to prepare a draft Safety Evaluation Report (SER) on the PSAR. This plan is prepared for and will be implemented by the APT Independent Safety Review Committee (ISRC) over the period July 1, 1997 through September 30, 1998, in accordance with provisions established in DOE-STD-1104-96. A core team of DOE, INEEL, and AMPARO Corporation engineers and scientists will prepare the initial draft SER with assistance from other ISRC team members on an as needed basis. Guidelines for preparing the draft SER are presented in Section 7 of this SRP. The PSAR reviews will focus exclusively on safety. The ever-present two-part question will be: Does the subject matter have safety significance? If so, does the APT structural, system, component, and/or process engineering design ensure an acceptable margin of safety? The APT mission, efficiency, and cost are not considerations of this plan. A more detailed discussion of the review philosophy is presented in Section 5 of this SRP.

  17. Fuzzy Multi-fractional Programming for Land Use Planning in Agricultural Production System

    Directory of Open Access Journals (Sweden)

    Babita Mishra

    2014-06-01

    Full Text Available In this paper, we present a multi-objective linear fractional programming (MOLFP approach for multi-objective linear fuzzy goal programming (MOLFGP problem. Here, we consider a problem in which a set of pair of goals are optimized in ratio rather than optimizing them individually. In particular, we consider the optimization of profit to cash expenditure and crop production in various seasons to land utilization as a fractional objectives and used remaining goals in its original form. Further, the goals set in agricultural production planning are conflicting in nature; thus we use the concept of conflict and nonconflict between goals for computation of appropriate aspiration level. The method is illustrated on a problem of agricultural production system for comparison with Biswas and Pal [1] method to show its suitability.

  18. A comprehensive approach for managing feasible solutions in production planning by an interacting network of Zero-Suppressed Binary Decision Diagrams

    Directory of Open Access Journals (Sweden)

    Keita Takahashi

    2015-04-01

    Full Text Available Product Lifecycle Management (PLM ranges from design concepts of products to disposal. In this paper, we focus on the production planning phase in PLM, which is related to process planning and production scheduling and so on. In this study, key decisions for the creation of production plans are defined as production-planning attributes. Production-planning attributes correlate complexly in production-planning problems. Traditionally, the production-planning problem splits sub-problems based on experiences, because of the complexity. In addition, the orders in which to solve each sub-problem are determined by priorities between sub-problems. However, such approaches make solution space over-restricted and make it difficult to find a better solution. We have proposed a representation of combinations of alternatives in production-planning attributes by using Zero-Suppressed Binary Decision Diagrams. The ZDD represents only feasible combinations of alternatives that satisfy constraints in the production planning. Moreover, we have developed a solution search method that solves production-planning problems with ZDDs. In this paper, we propose an approach for managing solution candidates by ZDDs׳ network for addressing larger production-planning problems. The network can be created by linkages of ZDDs that express constraints in individual sub-problems and between sub-problems. The benefit of this approach is that it represents solution space, satisfying whole constraints in the production planning. This case study shows that the validity of the proposed approach.

  19. The invisibility of fisheries in the process of hydropower development across the Amazon.

    Science.gov (United States)

    Doria, Carolina Rodrigues da Costa; Athayde, Simone; Marques, Elineide E; Lima, Maria Alice Leite; Dutka-Gianelli, Jynessa; Ruffino, Mauro Luis; Kaplan, David; Freitas, Carlos E C; Isaac, Victoria N

    2017-12-05

    We analyze the invisibility of fisheries and inadequacy of fishers' participation in the process of hydropower development in the Amazon, focusing on gaps between legally mandated and actual outcomes. Using Ostrom's institutional design principles for assessing common-pool resource management, we selected five case studies from Brazilian Amazonian watersheds to conduct an exploratory comparative case-study analysis. We identify similar problems across basins, including deficiencies in the dam licensing process; critical data gaps; inadequate stakeholder participation; violation of human rights; neglect of fishers' knowledge; lack of organization and representation by fishers' groups; and lack of governmental structure and capacity to manage dam construction activities or support fishers after dam construction. Fishers have generally been marginalized or excluded from decision-making regarding planning, construction, mitigation, compensation, and monitoring of the social-ecological impacts of hydroelectric dams. Addressing these deficiencies will require concerted investments and efforts by dam developers, government agencies and civil society, and the promotion of inter-sectorial dialogue and cross-scale participatory planning and decision-making that includes fishers and their associations.

  20. Hydropower licensing and evolving climate: climate knowledge to support risk assessment for long-term infrastructure decisions

    Science.gov (United States)

    Ray, A. J.; Walker, S. H.; Trainor, S. F.; Cherry, J. E.

    2014-12-01

    This presentation focuses on linking climate knowledge to the complicated decision process for hydropower dam licensing, and the affected parties involved in that process. The U.S. Federal Energy Regulatory Commission issues of licenses for nonfederal hydroelectric operations, typically 30-50 year licenses, and longer infrastructure lifespan, a similar time frame as the anticipated risks of changing climate and hydrology. Resources managed by other federal and state agencies such as the NOAA National Marine Fisheries Service may be affected by new or re-licensed projects. The federal Integrated Licensing Process gives the opportunity for affected parties to recommend issues for consultative investigation and possible mitigation, such as impacts to downstream fisheries. New or re-licensed projects have the potential to "pre-adapt" by considering and incorporating risks of climate change into their planned operations as license terms and conditions. Hundreds of hydropower facilities will be up for relicensing in the coming years (over 100 in the western Sierra Nevada alone, and large-scale water projects such as the proposed Lake Powell Pipeline), as well as proposed new dams such as the Susitna project in Alaska. Therefore, there is a need for comprehensive guidance on delivering climate analysis to support understanding of risks of hydropower projects to other affected resources, and decisions on licensing. While each project will have a specific context, many of the questions will be similar. We also will discuss best practices for the use of climate science in water project planning and management, and how creating the best and most appropriate science is also still a developing art. We will discuss the potential reliability of that science for consideration in long term planning, licensing, and mitigation planning for those projects. For science to be "actionable," that science must be understood and accepted by the potential users. This process is a negotiation

  1. The virtual maintenance system: a computer-based support tool for robust design, product monitoring, fault diagnosis and maintenance planning

    NARCIS (Netherlands)

    van Houten, Frederikus J.A.M.; Kimura, F.

    2000-01-01

    Digital (geometric) product models can be used for maintainability analysis and maintenance planning. It is not feasible to build digital product models for maintenance purposes only, but if a digital product model is available, it may be used to support many maintenance-related engineering tasks.

  2. DOE Hydropower Program Annual Report for FY 2001

    Energy Technology Data Exchange (ETDEWEB)

    Sale, M. J. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Cada, G. F. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Carlson, T. J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Dauble, D. D. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Hunt, R. T. [Idaho National Lab. (INL), Idaho Falls, ID (United States). Idaho National Engineering and Environmental Lab. (INEEL); Sommers, G. L. [Idaho National Lab. (INL), Idaho Falls, ID (United States). Idaho National Engineering and Environmental Lab. (INEEL); Rinehart, B. N. [Consultant; Flynn, J. V. [U.S. Dept. of Energy, Washington, D.C. (United States); Brookshier, P. A. [U.S. Dept. of Energy, Washington, D.C. (United States)

    2002-04-01

    This annual report describes the various projects supported by the hydropower program in FY 2001. The program’s focus for FY 2002 was on improving the environmental performance of hydropower projects by addressing problems such as fish mortality during passage through turbines, alteration of instream habitat, and water quality in tailwaters. A primary goal of this research was to develop new, environmentally friendly technology. DOE-funded projects have produced new conceptual designs for turbine systems, and these were tested in pilot-scale laboratory tests and in the field. New design approaches range from totally new turbine runners (e.g., work by Alden Research Laboratory and Concepts NREC) to modifications to existing designs (e.g., Voith Siemens work on Minimum Gap Runners). Biological criteria have also been developed in controlled laboratory tests of fish response to physical stresses, such as hydraulic shear and pressure changes. These biocriteria were combined with computational design tools to locate and eliminate damaging areas inside turbine systems.

  3. Small hydropower plants standardization, between myth and reality

    Science.gov (United States)

    Paraschivescu, A. V.; Ahmad-Rashid, K.; Popa, F.; Popa, B.

    2017-01-01

    Many providers for small hydropower plants equipment have tried to standardize the components and even the entire equipment. So called “compact turbines” were launched on the market, ensuring the pre-designed solution of the modular components, but usually with lower efficiency then turbines specially designed for a certain site. For civil works it is possible to standardize some components, such as the powerhouse, the surge tank or the headrace, but not the intake and the weir. Part of the hydropower plants can be standardized, but not the entire project, because there are a lot of variables that influence the design. Among these, the dimension, materials and design of the canal and the penstock are given by the hydrology, topography and the geology of the project’s area. This paper presents an attempt at standardization by using different heads and different installed flows. The case study is made on the Lukosi River from Tanzania, because there is a good hydrological database on power and energy calculation. For the powerhouse, pressure tower and intake dimensioning, the assumptions and materials considered cover all challenges that could appear in the geological and topographical structure of the project’s area (worst case, most expensive). The study has highlighted African climatologic and hydrological conditions and the adapting of current technology to these conditions.

  4. DOE/PSU Graduate Student Fellowship Program for Hydropower

    Energy Technology Data Exchange (ETDEWEB)

    Cimbala, John M. [Pennsylvania State Univ., State College, PA (United States)

    2014-03-30

    The primary objective of this project is to stimulate academic interest in the conventional hydropower field by supplying research support for at least eight individual Master of Science (MS) or Doctoral (PhD) level research projects, each consisting of a graduate student supervised by a faculty member. We have completed many of the individual student research projects: 2 PhD students have finished, and 4 are still working towards their PhD degree. 4 MS students have finished, and 2 are still working towards their MS degree, one of which is due to finish this April. In addition, 4 undergraduate student projects have been completed, and one is to be completed this April. These projects were supervised by 7 faculty members and an Advisory/Review Panel. Our students and faculty have presented their work at national or international conferences and have submitted several journal publications. Three of our graduate students (Keith Martin, Dan Leonard and Hosein Foroutan) have received HRF Fellowships during the course of this project. All of the remaining students are anticipated to be graduated by the end of Fall Semester 2014. All of the tasks for this project will have been completed once all the students have been graduated, although it will be another year or two until all the journal publications have been finalized based on the work performed as part of this DOE Hydropower project.

  5. Inter-subject variability modulates phonological advance planning in the production of adjective-noun phrases.

    Science.gov (United States)

    Michel Lange, Violaine; Laganaro, Marina

    2014-01-01

    The literature on advance phonological planning in adjective-noun phrases (NPs) presents diverging results: while many experimental studies suggest that the entire NP is encoded before articulation, other results favor a span of encoding limited to the first word. Although cross-linguistic differences in the structure of adjective-NPs may account for some of these contrasting results, divergences have been reported even among similar languages and syntactic structures. Here we examined whether inter-individual differences account for variability in the span of phonological planning in the production of French NPs, where previous results indicated encoding limited to the first word. The span of phonological encoding is tested with the picture-word interference (PWI) paradigm using phonological distractors related to the noun or to the adjective of the NPs. In Experiment 1, phonological priming effects were limited to the first word in adjective NPs whichever the position of the adjective (pre-nominal or post-nominal). Crucially, phonological priming effects on the second word interacted with speakers' production speed suggesting different encoding strategies for participants. In Experiment 2, we tested this hypothesis further with a larger group of participants. Results clearly showed that slow and fast initializing participants presented different phonological priming patterns on the last element of adjective-NPs: while the first word was primed by a distractor for all speakers, only the slow speaker group presented a priming effect on the second element of the NP. These results show that the span of phonological encoding is modulated by inter-individual strategies: in experimental paradigms some speakers plan word by word whereas others encode beyond the initial word. We suggest that the diverging results reported in the literature on advance phonological planning may partly be reconciled in light of the present results.

  6. Inter-subject variability modulates phonological advance planning in the production of adjective-noun phrases

    Directory of Open Access Journals (Sweden)

    Violaine eMichel Lange

    2014-01-01

    Full Text Available The literature on advance phonological planning in adjective-noun phrases (NPs presents diverging results: while many experimental studies suggest that the entire NP is encoded before articulation, other results favour a span of encoding limited to the first word. Although cross-linguistic differences in the structure of adjective-noun phrases may account for some of these contrasting results, divergences have been reported even among similar languages and syntactic structures. Here we examined whether inter-individual differences account for variability in the span of phonological planning in the production of French NPs, where previous results indicated encoding limited to the first word. The span of phonological encoding is tested with the picture-word interference (PWI paradigm using phonological distractors related to the noun or to the adjective of the NPs. In Experiment 1, phonological priming effects were limited to the first word in adjective NPs whichever the position of the adjective (pre-nominal or post-nominal. Crucially, phonological priming effects on the second word interacted with speakers´ production speed suggesting different encoding strategies for participants. In Experiment 2, we tested this hypothesis further with a larger group of participants. Results clearly showed that slow and fast initialising participants presented different phonological priming patterns on the last element of adjective-noun phrases: while the first word was primed by a distractor for all speakers, only the slow speaker group presented a priming effect on the second element of the NP. These results show that the span of phonological encoding is modulated by inter-individual strategies: in experimental paradigms some speakers plan word by word whereas others encode beyond the initial word. We suggest that the diverging results reported in the literature on advance phonological planning may partly be reconciled in light of the present results.

  7. ProSens: integrated production control by automated inspection planning and efficient multisensor metrology

    Science.gov (United States)

    Glaser, Ulf; Li, Zhichao; Bichmann, Stephan, II; Pfeifer, Tilo

    2003-05-01

    By China's entry into the WTO, Chinese as well as German companies are facing the question, how to minimize the risk of unfamiliar cooperation partners when developing products. The rise of customer demands concerning quality, product diversity and the reduction of expenses require flexibility and efficiency with reliable component suppliers. In order to build and strengthen sino-german cooperations, a manufacturing control using homogenized and efficient measures to assure high quality is of vital importance. Lack of unifications may cause identical measurements conducted at subcontractors or customers to be carried out with different measurement processes which leads to incomparable results. Rapidly growing company cooperations and simultaneously decreasing of manufacturing scope cause substantial difficulties when coordinating joint quality control activities. "ProSens," a sino-german project consortium consisting of industrial users, technology producers and research institutes, aims at improving selected production processes by: Creation of a homogeneous quality awareness in sino-german cooperations. Sensitization for process accompanying metrology at an early stage of product development. Increase of the process performance by the use of integrated metrology. Reduction of production time and cost. Unification of quality control of complex products by means of efficient measurement strategies and CAD-based inspection planning.

  8. Wind-Driven Ecological Flow Regimes Downstream from Hydropower Dams

    Science.gov (United States)

    Kern, J.; Characklis, G. W.

    2012-12-01

    Conventional hydropower can be turned on and off quicker and less expensively than thermal generation (coal, nuclear, or natural gas). These advantages enable hydropower utilities to respond to rapid fluctuations in energy supply and demand. More recently, a growing renewable energy sector has underlined the need for flexible generation capacity that can complement intermittent renewable resources such as wind power. While wind power entails lower variable costs than other types of generation, incorporating it into electric power systems can be problematic. Due to variable and unpredictable wind speeds, wind power is difficult to schedule and must be used when available. As a result, integrating large amounts of wind power into the grid may result in atypical, swiftly changing demand patterns for other forms of generation, placing a premium on sources that can be rapidly ramped up and down. Moreover, uncertainty in wind power forecasts will stipulate increased levels of 'reserve' generation capacity that can respond quickly if real-time wind supply is less than expected. These changes could create new hourly price dynamics for energy and reserves, altering the short-term financial signals that hydroelectric dam operators use to schedule water releases. Traditionally, hourly stream flow patterns below hydropower dams have corresponded in a very predictable manner to electricity demand, whose primary factors are weather (hourly temperature) and economic activity (workday hours). Wind power integration has the potential to yield more variable, less predictable flows at hydro dams, flows that at times could resemble reciprocal wind patterns. An existing body of research explores the impacts of standard, demand-following hydroelectric dams on downstream ecological flows; but weighing the benefits of increased reliance on wind power against further impacts to ecological flows may be a novel challenge for the environmental community. As a preliminary step in meeting this

  9. Revised Master Plan for the Hood River Production Program, Technical Report 2008.

    Energy Technology Data Exchange (ETDEWEB)

    Oregon Department of Fish and Wildlife; Confederated Tribes of the Warm Springs Reservation

    2008-04-28

    The Hood River Production Program (HRPP) is a Bonneville Power Administration (BPA) funded program initiated as a mitigation measure for Columbia River hydrosystem effects on anadromous fish. The HRPP began in the early 1990s with the release of spring Chinook and winter steelhead smolts into the basin. Prior to implementation, co-managers, including the Confederated Tribes of the Warm Springs Reservation and the Oregon Department of Fish and Wildlife drafted the Hood River Production Master Plan (O'Toole and ODFW 1991a; O'Toole and ODFW 1991b) and the Pelton Ladder Master Plan (Smith and CTWSR 1991). Both documents were completed in 1991 and subsequently approved by the Council in 1992 and authorized through a BPA-led Environmental Impact Statement in 1996. In 2003, a 10-year programmatic review was conducted for BPA-funded programs in the Hood River (Underwood et al. 2003). The primary objective of the HRPP Review (Review) was to determine if program goals were being met, and if modifications to program activities would be necessary in order to meet or revise program goals. In 2003, an agreement was signed between PacifiCorp and resource managers to remove the Powerdale Dam (RM 10) and associated adult trapping facility by 2010. The HRPP program has been dependant on the adult trap to collect broodstock for the hatchery programs; therefore, upon the dam's removal, some sort of replacement for the trap would be needed to continue the HRPP. At the same time the Hood River Subbasin Plan (Coccoli 2004) was being written and prompted the co-managers to considered future direction of the program. This included revising the numerical adult fish objectives based on the assimilated data and output from several models run on the Hood River system. In response to the Review as well as the Subbasin Plan, and intensive monitoring and evaluation of the current program, the HRPP co-managers determined the spring Chinook program was not achieving the HRPP

  10. 77 FR 72686 - HACCP Plan Reassessment for Not-Ready-To-Eat Comminuted Poultry Products and Related Agency...

    Science.gov (United States)

    2012-12-06

    ... Food Safety and Inspection Service 9 CFR Parts 417 HACCP Plan Reassessment for Not-Ready-To-Eat... Service, USDA. ACTION: Compliance with the HACCP system regulations and request for comments SUMMARY: The... reassess their Hazard Analysis and Critical Control Points (HACCP) plans for these products to take into...

  11. Hydropower Licensing as a Bridge between Climate Science and Applications: Creating Actionable Science for Regulatory Decisionmaking

    Science.gov (United States)

    Ray, A. J.; Barsugli, J. J.; Walker, S. H.

    2016-12-01

    The Integrated Licensing Process (ILP) of the US Federal Energy Regulatory Commission (FERC) is an example of an existing regulatory process that has the capacity to bridge the gap between science and decision making by clearly delineating existing science, the climate-regulatory nexus, and additional scientific work needed to inform licensing or relicensing of non-federal hydropower projects. In a parallel, but interacting set of legal and regulatory processes, NOAA's National Marine Fisheries Service (NMFS) must conduct analyses based on the best available science in order to implement the requirements of the Endangered Species Act (ESA), the Magnuson-Stevens Act, and NEPA, and to develop terms and conditions to protect fisheries for the 30-50 year term of the license and the longer life of the project itself. Therefore, NMFS must understand the combined effects of hydropower projects and climate change to fulfill its own mandates to protect anadromous fish, protected species and habitat. Federal Executive Order (EO) #13693 on climate change sustainability require use of climate risks in planning, also recommended in NOAA's own guidance on implementing ESA, and the Council on Environmental Quality (CEQ) guidance on implementing NEPA; however, as an independent agency FERC is not subject to that EO. In the past, FERC has consistently rejected NMFS' climate study requests, stating, among other reasons, that climate science is `too uncertain,' and therefore not actionable. Thus, in order for NMFS to get the information needed for its own decision process, NOAA must first persuade FERC that the science is actionable. This presentation will describe our experiences in a multi-year effort by an interdisciplinary team of climate and fishery scientists to develop acceptable climate study requests that address FERC's concerns about uncertainty, for the Susitna-Watana project on Alaska's Susitna River, the LaGrange Project on the Tuolumne R. in California, and the Hiram

  12. Utah ITS/CVO business plan : using technology to maximize highway safety and improve government and industry productivity

    Science.gov (United States)

    1997-12-31

    This plan was produced to maximize highway safety and increase government and industry productivity through the application of Intelligent Transportation System/Commercial Vehicle Operations (ITS/CVO) technologies to support regulatory and enforcemen...

  13. Accelerating Sustainability by Hydropower Development in China: The Story of HydroLancang

    Directory of Open Access Journals (Sweden)

    Yan Zhang

    2017-07-01

    Full Text Available Sustainable development is a shared responsibility. Accelerating sustainability of water–energy–people nexus and building a common awareness of issues pertaining to sustainable development are essential for any sort of success in this direction. Hydropower has been a useful sustainable energy for development, yet highly controversial. This paper reviews the overall situation of hydropower development and China’s energy reforms and policies, accompanied with a case study of hydropower development the Lancang River by the HydroLancang, aiming to illustrate the two opposite sides of hydropower development—economy and environment. The paper concludes with a neutral view of hydropower as the necessary facilitator for development. Water is a shared responsibility. Hydropower might not be the optimum solution to eliminate the tension between human demand of energy and finite natural resource and the rising pressure of climate change worldwide, but it serves well as an “Electricity Bridge” before better alternatives become available. This is a more balanced view of hydropower rather than two extreme viewpoints that present themselves: on the one hand, exaggerated claims of the human power to tame the wild river, and, on the other hand, the idealistic fantasy of preserving nature by abandoning all human activity.

  14. A GIS based assessment of hydropower potential in Hornád basin

    Directory of Open Access Journals (Sweden)

    �ofia Kuzevičová

    2013-12-01

    Full Text Available The issue of efficient use of hydropower, ones of the available renewable resources is currently in the process of sustainable development of each country, often addressing the issue. Incite multiple aspects. It is now seen just growing interest in exploiting the potential of hydropower. On the basis of active efforts are developed to map the total quantity of usability hydropower at basin level in Slovakia. GIS as a powerful and sophisticated tool for processing spatially localized information and offers support for renewable energy sources (not excluding the field of hydropower. Through the integration of spatial data allows assessing the real problems and thus contributing effectively to make rational decisions. Especially in the field of hydropower projects have GIS well founded importance. Of course is important to mention that the potential for hydroelectric power is useless without the operation of hydropower that converts water into electrical energy. For the needs of administrators of watercourses and operators of water systems, the proposed model can be an important tool for decision-making in relation to its implementation activities. Contribution to the design solutions for potential hydropower will address river basin Hornád.

  15. Rebuilding of the Altermatt hydropower installation in Frauenfeld, Switzerland - Building permission and implementation project; Werkbetriebe Frauenfeld: Neubau Wasserkraftwerk Altermatt-Frauenfeld - Konzessions- und Bauprojekt. Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Hintermann, M.

    2008-04-15

    This illustrated final report elaborated for the Swiss Federal Office of Energy (SFOE) takes a look at a project concerning the rebuilding of the existing Altermatt hydropower station in Frauenfeld, Switzerland. The history of the installation, built in 1860 and put out of service in the 1980s, is briefly discussed. The project for the reactivation of the location with a new hydropower station is discussed and various studies made concerning the location are examined. Figures on the water flow to be expected are presented and the concept behind the project is discussed, as are details such as water levels and installations that will help fish and beavers get past the power station's dam. The electromechanical installations of the 120 kW power station are briefly described. Environmental aspects are also discussed and figures are quoted on the energy production to be expected and the costs involved.

  16. Hydro-power installation at Fein-Elast Grabher AG in Lichtensteig - Preliminary study; Fein-Elast Grabher AG - Lichtensteig. Stauwehr / Schleusenbruecke / Wasserkraftanlage. Vorprojektstudie - Technischer Bericht

    Energy Technology Data Exchange (ETDEWEB)

    Hintermann, M.

    2008-07-01

    This technical report for the Swiss Federal Office of Energy (SFOE) describes project variants for the replacement of a hydro-power plant on the River Thur in Lichtensteig, Switzerland. The new installation is to produce more power by using a greater volume of water than the old installation, parts of which date from 1820. The report reviews possibilities for and restrictions on the renewal of the installation and recommends one of four possible variants proposed.. Water-flow statistics and flood-protection issues are discussed. Environmental issues connected with the project are also examined. Energy production figures, cost estimates and economic viability issues are discussed. The proposed course of events involved in replacing the hydropower installation and an associated road bridge is described.

  17. Production and Maintenance Planning for a Deteriorating System with Operation-Dependent Defectives

    Directory of Open Access Journals (Sweden)

    Héctor Rivera-Gómez

    2018-01-01

    Full Text Available This paper provides new insights to the area of sustainable manufacturing systems at analyzing the novel paradigm of integrated production logistics, quality, and maintenance design. For this purpose, we investigate the optimal production and repair/major maintenance switching strategy of an unreliable deteriorating manufacturing system. The effects of the deterioration process are mainly observed on the failure intensity and on the quality of the parts produced, where the rate of defectives depends on the production rate. When unplanned failures occur, either a minimal repair or a major maintenance could be conducted. The integration of availability and quality deterioration led us to propose a new stochastic dynamic programming model where optimality conditions are derived through the Hamilton-Jacobi-Bellman equations. The model defined the joint production and repair/major maintenance switching strategies minimizing the total cost over an infinite planning horizon. In the results, the influence of the deterioration process were evident in both the production and maintenances control parameters. A numerical example and an extensive sensitivity analysis were conducted to illustrate the usefulness of the results. Finally, the proposed control policy was compared with alternative strategies based on common assumptions of the literature in order to illustrate its efficiency.

  18. The Role of Hydropower in Climate Change Mitigation and Adaptation: A Review

    Directory of Open Access Journals (Sweden)

    Luis Berga

    2016-09-01

    Full Text Available Hydropower is a clean, renewable, and environmentally friendly source of energy. It produces 3930 (TW.h.a−1, and yields 16% of the world’s generated electricity and about 78% of renewable electricity generation (in 2015. Hydropower and climate change show a double relationship. On the one hand, as an important renewable energy resource, hydropower contributes significantly to the avoidance of greenhouse gas (GHG emissions and to the mitigation of global warming. On the other hand, climate change is likely to alter river discharge, impacting water availability and hydropower generation. Hydropower contributes significantly to the reduction of GHG emissions and to energy supply security. Compared with conventional coal power plants, hydropower prevents the emission of about 3 GT CO2 per year, which represents about 9% of global annual CO2 emissions. Hydropower projects may also have an enabling role beyond the electricity sector, as a financing instrument for multipurpose reservoirs and as an adaptive measure regarding the impacts of climate change on water resources, because regulated basins with large reservoir capacities are more resilient to water resource changes, less vulnerable to climate change, and act as a storage buffer against climate change. At the global level, the overall impact of climate change on existing hydropower generation may be expected to be small, or even slightly positive. However, there is the possibility of substantial variations across regions and even within countries. In conclusion, the general verdict on hydropower is that it is a cheap and mature technology that contributes significantly to climate change mitigation, and could play an important role in the climate change adaptation of water resource availability. However, careful attention is necessary to mitigate the substantial environmental and social costs. Roughly more than a terawatt of capacity could be added in upcoming decades.

  19. Hierarchy and scope of planning in subject-verb agreement production.

    Science.gov (United States)

    Gillespie, Maureen; Pearlmutter, Neal J

    2011-03-01

    Two subject-verb agreement error elicitation studies tested the hierarchical feature-passing account of agreement computation in production and three timing-based alternatives: linear distance to the head noun, semantic integration, and a combined effect of both (a scope of planning account). In Experiment 1, participants completed subject noun phrase (NP) stimuli consisting of a head NP followed by two prepositional phrase (PP) modifiers, where the first PP modified the first NP, and the second PP modified one of the two preceding NPs. Semantic integration between the head noun and the local noun within each PP was held constant across structures. The mismatch error pattern showed an effect of linear distance to the head noun and no influence of hierarchical distance. In Experiment 2, participants completed NP PP PP stimuli in which both PPs modified the head noun, and both the order of the two PPs and the local nouns' degree of semantic integration with the head noun were varied. The pattern of mismatch errors reflected a combination of semantic integration and linear distance to the head noun. These studies indicate that agreement processes are strongly constrained by grammatical-level scope of planning, with local nouns planned closer to the head having a greater chance of interfering with agreement computation. Copyright © 2010 Elsevier B.V. All rights reserved.

  20. An integrated approach for supply-production planning in a supply chain

    Directory of Open Access Journals (Sweden)

    Mohammad Sabet Motlagh

    2013-06-01

    Full Text Available Many firms try to optimize their supply and production levels separately, but this method could limit influence profitability, negatively. Thus, it is becoming more important to analyze these two levels, simultaneously. In this paper, an integrated supply-production planning is considered, simultaneously. We develop a mathematical model, which calculates the optimal inventory lot sizing for each supplier and minimizes the total cost associated with the process of procuring raw material, transferring and holding raw materials and manufacturing. The problem is formulated as a nonlinear programming and heuristic genetic algorithm (GA method is developed to solve the resulted problem. We examine the performance of the proposed model for a case study conducted in Iran. Experimental results show that such a model can reduce the costs of the case study, substantially.

  1. Improving productivity and profitability of a bioanalytical business through sales and operation planning.

    Science.gov (United States)

    Islam, Rafiqul

    2013-07-01

    Today's bioanalytical CROs face increasing global competition, highly variable demand, high fixed costs, pricing pressure, and increasing demand for quality and speed. Most bioanalytical laboratories have responded to these challenges by implementing automation and by implementing process improvement methodologies (e.g., Six Sigma). These solutions have not resulted in a significant improvement in productivity and profitability since none of them are able to predict the upturn or downturn in demand. High volatility of demand causes long lead times and high costs during peak demand and poor productivity during trough demand. Most bioanalytical laboratories lack the tools to align supply efficiently to meet changing demand. In this paper, sales and operation planning (S&OP) has been investigated as a tool to balance supply and demand. The S&OP process, when executed effectively, can be the single greatest determinant of profitability for a bioanalytical business.

  2. Dynamic Modeling of Adjustable-Speed Pumped Storage Hydropower Plant: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Muljadi, E.; Singh, M.; Gevorgian, V.; Mohanpurkar, M.; Havsapian, R.; Koritarov, V.

    2015-04-06

    Hydropower is the largest producer of renewable energy in the U.S. More than 60% of the total renewable generation comes from hydropower. There is also approximately 22 GW of pumped storage hydropower (PSH). Conventional PSH uses a synchronous generator, and thus the rotational speed is constant at synchronous speed. This work details a hydrodynamic model and generator/power converter dynamic model. The optimization of the hydrodynamic model is executed by the hydro-turbine controller, and the electrical output real/reactive power is controlled by the power converter. All essential controllers to perform grid-interface functions and provide ancillary services are included in the model.

  3. Safety requirements to the operation of hydropower plants; Sicherheit beim Betrieb von Wasserkraftwerken

    Energy Technology Data Exchange (ETDEWEB)

    Lux, Reinhard [Berufsgenossenschaft Energie Textil Elektro Medienerzeugnisse (BG ETEM), Koeln (Germany)

    2011-07-01

    Employers have to take into account various safety and health requirements relating to the design, construction, operation and maintenance of hydropower plants. Especially the diversity of the hydropower plant components requires the consideration of different safety and health aspects. In 2011 the ''Fachausschuss Elektrotechnik'' (expert committee electro-technics) of the institution for statutory accident insurance and prevention presented a new ''BG-Information'' dealing with ''Safe methods operating hydropower plants''. The following article gives an introduction into the conception and the essential requirements of this new BG-Information. (orig.)

  4. DOE Hydropower Program biennial report 1990--1991 (with updated annotated bibliography)

    Energy Technology Data Exchange (ETDEWEB)

    Chappell, J.R.; Rinehart, B.N.; Sommers, G.L. (Idaho National Engineering Lab., Idaho Falls, ID (United States)); Sale, M.J. (Oak Ridge National Lab., TN (United States))

    1991-07-01

    This report summarizes the activities of the US Department of Energy's (DOE) Hydropower Program for fiscal years 1990 and 1991, and provides an annotated bibliography of research, engineering, operations, regulations, and costs of projects pertinent to hydropower development. The Hydropower Program is organized as follows: background (including Technology Development and Engineering Research and Development); Resource Assessment; National Energy Strategy; Technology Transfer; Environmental Research; and, the bibliography discusses reports written by both private and non-Federal Government sectors. Most reports are available from the National Technical Information Service. 5 figs., 2 tabs.

  5. DOE Hydropower Program biennial report 1992--1993 (with an updated annotated bibliography)

    Energy Technology Data Exchange (ETDEWEB)

    Cada, G.F.; Sale, M.J. [Oak Ridge National Lab., TN (United States); Francfort, J.E.; Rinehart, B.N.; Sommers, G.L. [EG and G Idaho, Inc., Idaho Falls, ID (United States)

    1993-07-01

    This report, the latest in a series of annual/biennial Hydropower Program reports sponsored by the US Department of Energy, summarizes the research and development and technology transfer activities of fiscal years 1992 and 1993. The report discusses the activities in the four areas of the hydropower program: Environmental research; resource assessment; research coat shared with industry; and technology transfer. The report also offers an annotated bibliography of reports pertinent to hydropower, written by persons in Federal and state agencies, cities, metropolitan water districts, irrigation companies, and public and independent utilities. Most reports are available from the National Technical Information Service.

  6. DOE Hydropower Program biennial report 1994--1995 with an updated annotated bibliography

    Energy Technology Data Exchange (ETDEWEB)

    Rinehart, B.N.; Francfort, J.E.; Sommers, G.L. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States); Cada, G.F.; Sale, M.J. [Oak Ridge National Lab., TN (United States)

    1995-05-01

    This report, the latest in a series of annual/biennial Hydropower Program reports sponsored by the US Department of Energy, summarizes the research and development and technology transfer activities of fiscal years 1994 and 1995. The report discusses the activities in the four areas of the hydropower program: Environmental Research; Resource Assessment; Research Cost-Shared with Industry; and Technology Transfer. The report also includes an annotated bibliography of reports pertinent to hydropower, written by the staff of the Idaho National Engineering Laboratory, Oak Ridge National Laboratory, Federal and state agencies, cities, metropolitan water districts, irrigation companies, and public and independent utilities. Most reports are available from the National Technical Information Service.

  7. Human factors studies for injectable combination products: from planning to reporting.

    Science.gov (United States)

    Towns, John K

    2014-01-01

    Interest in human factors usability testing has seen a sharp increase from manufacturers bringing new injectable pharmaceutical combination products to market and from regulators reviewing and approving submissions. This paper highlights the special regulatory considerations in the planning, execution, and reporting of human factor usability studies for injectable combination products. The paper describes recent human factors examples that capture and convey important sponsor learning for drug/device combination products. Special emphasis is placed on the recent focus across U.S. Food and Drug Administration centers, offices, and divisions in issuing new draft guidance outlining expectations in the execution and reporting of usability testing. Insight is provided into how the new guidance has been put into practice in the development and review of injectable combination products, and some of the unwritten recommendations/expectations that have been gleaned from these regulatory interactions are identified. The paper also describes future areas of opportunity for regulatory guidance based on reflections from over two dozen recent combination product human factor studies covering from early design development and testing through to the reporting of human factors results in the final submission. Human factors is the study of the interaction of people and technology to ensure the safety and effectiveness of that interaction and to improve human/device compatibility, including the user interface, instructions, and training programs to avoid use error. The enhanced focus on human factors usability assessments for injectable combination products is an acknowledgement by regulators and industry that the device mechanics are typically quite reliable and that device risk hazards are likely due to device usability. Use errors can occur when the device is not being used as intended or the design features are less than optimal. Human factors testing, analysis, and validation

  8. Word Order and Voice Influence the Timing of Verb Planning in German Sentence Production

    Science.gov (United States)

    Sauppe, Sebastian

    2017-01-01

    Theories of incremental sentence production make different assumptions about when speakers encode information about described events and when verbs are selected, accordingly. An eye tracking experiment on German testing the predictions from linear and hierarchical incrementality about the timing of event encoding and verb planning is reported. In the experiment, participants described depictions of two-participant events with sentences that differed in voice and word order. Verb-medial active sentences and actives and passives with sentence-final verbs were compared. Linear incrementality predicts that sentences with verbs placed early differ from verb-final sentences because verbs are assumed to only be planned shortly before they are articulated. By contrast, hierarchical incrementality assumes that speakers start planning with relational encoding of the event. A weak version of hierarchical incrementality assumes that only the action is encoded at the outset of formulation and selection of lexical verbs only occurs shortly before they are articulated, leading to the prediction of different fixation patterns for verb-medial and verb-final sentences. A strong version of hierarchical incrementality predicts no differences between verb-medial and verb-final sentences because it assumes that verbs are always lexically selected early in the formulation process. Based on growth curve analyses of fixations to agent and patient characters in the described pictures, and the influence of character humanness and the lack of an influence of the visual salience of characters on speakers' choice of active or passive voice, the current results suggest that while verb planning does not necessarily occur early during formulation, speakers of German always create an event representation early. PMID:29018379

  9. Word Order and Voice Influence the Timing of Verb Planning in German Sentence Production

    Directory of Open Access Journals (Sweden)

    Sebastian Sauppe

    2017-09-01

    Full Text Available Theories of incremental sentence production make different assumptions about when speakers encode information about described events and when verbs are selected, accordingly. An eye tracking experiment on German testing the predictions from linear and hierarchical incrementality about the timing of event encoding and verb planning is reported. In the experiment, participants described depictions of two-participant events with sentences that differed in voice and word order. Verb-medial active sentences and actives and passives with sentence-final verbs were compared. Linear incrementality predicts that sentences with verbs placed early differ from verb-final sentences because verbs are assumed to only be planned shortly before they are articulated. By contrast, hierarchical incrementality assumes that speakers start planning with relational encoding of the event. A weak version of hierarchical incrementality assumes that only the action is encoded at the outset of formulation and selection of lexical verbs only occurs shortly before they are articulated, leading to the prediction of different fixation patterns for verb-medial and verb-final sentences. A strong version of hierarchical incrementality predicts no differences between verb-medial and verb-final sentences because it assumes that verbs are always lexically selected early in the formulation process. Based on growth curve analyses of fixations to agent and patient characters in the described pictures, and the influence of character humanness and the lack of an influence of the visual salience of characters on speakers' choice of active or passive voice, the current results suggest that while verb planning does not necessarily occur early during formulation, speakers of German always create an event representation early.

  10. Computer-aided process planning in prismatic shape die components based on Standard for the Exchange of Product model data

    Directory of Open Access Journals (Sweden)

    Awais Ahmad Khan

    2015-11-01

    Full Text Available Insufficient technologies made good integration between the die components in design, process planning, and manufacturing impossible in the past few years. Nowadays, the advanced technologies based on Standard for the Exchange of Product model data are making it possible. This article discusses the three main steps for achieving the complete process planning for prismatic parts of the die components. These three steps are data extraction, feature recognition, and process planning. The proposed computer-aided process planning system works as part of an integrated system to cover the process planning of any prismatic part die component. The system is built using Visual Basic with EWDraw system for visualizing the Standard for the Exchange of Product model data file. The system works successfully and can cover any type of sheet metal die components. The case study discussed in this article is taken from a large design of progressive die.

  11. Simulation model for improved production planning and control through quality, cycle time and batch size management

    Directory of Open Access Journals (Sweden)

    Kotevski Živko

    2015-01-01

    Full Text Available Production planning and control (PPC systems are the base of all production facilities. In today's surroundings, having a good PPC system generates lots of benefits for the companies. But, having an excellent PPC system provides great competitive advantage and serious reduction of cost in many fields. In order to get to a point of having excellent PPC, the companies turn more and more to the newest software tools, for simulations as an example. Considering today's advanced computer technology, by using the simulations in this area, companies will have strong asset when dealing with different kinds of wastes, delays, overstock, bottlenecks and generally loss of time. This model is applicable in almost all production facilities. Taking into account the different scrap percentages for the pieces that form the end product, a detailed model and analysis were made in order to determine the optimal starting parameters. At first all the conditions of the company were determined, conceptual model was created along with all assumptions. Then the model was verified and validated and at the end a cost benefit analysis was conducted in order to have clear results.

  12. Analysis of information systems for hydropower operations: Executive summary

    Science.gov (United States)

    Sohn, R. L.; Becker, L.; Estes, J.; Simonett, D.; Yeh, W.

    1976-01-01

    An analysis was performed of the operations of hydropower systems, with emphasis on water resource management, to determine how aerospace derived information system technologies can effectively increase energy output. Better utilization of water resources was sought through improved reservoir inflow forecasting based on use of hydrometeorologic information systems with new or improved sensors, satellite data relay systems, and use of advanced scheduling techniques for water release. Specific mechanisms for increased energy output were determined, principally the use of more timely and accurate short term (0-7 days) inflow information to reduce spillage caused by unanticipated dynamic high inflow events. The hydrometeorologic models used in predicting inflows were examined in detail to determine the sensitivity of inflow prediction accuracy to the many variables employed in the models, and the results were used to establish information system requirements. Sensor and data handling system capabilities were reviewed and compared to the requirements, and an improved information system concept was outlined.

  13. Outlook for hydropower in Latin America and the Caribbean

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez-Sierra, G. (OLADE, Quito (Ecuador))

    1993-02-01

    In the last two decades, the Latin America/Carribean region has become increasingly dependent on electricity to meet growing demands for energy. Hydropower is the prevailing source for meeting this need. Hydroelectric generation increased at an annual average rate of nearly 9% between 1971 and 1989. HYdro now provides more than two-thirds of total electric power generated in Latin America and the Caribbean. The only other predominant source used for electric generation is fossil fuels. In this region there are several trends developing. They include: developing more small hydro facilities, opportunities for sharing water resources, an interest in changing the approach to water use regulation, and possibilities for more participation by the private sector. Overall, hydro appears to have a favorable competitive position in the power industry in the Latin America/Caribbean region.

  14. Development of environmentally advanced hydropower turbine system design concepts

    Energy Technology Data Exchange (ETDEWEB)

    Franke, G.F.; Webb, D.R.; Fisher, R.K. Jr. [Voith Hydro, Inc. (United States)] [and others

    1997-08-01

    A team worked together on the development of environmentally advanced hydro turbine design concepts to reduce hydropower`s impact on the environment, and to improve the understanding of the technical and environmental issues involved, in particular, with fish survival as a result of their passage through hydro power sites. This approach brought together a turbine design and manufacturing company, biologists, a utility, a consulting engineering firm and a university research facility, in order to benefit from the synergy of diverse disciplines. Through a combination of advanced technology and engineering analyses, innovative design concepts adaptable to both new and existing hydro facilities were developed and are presented. The project was divided into 4 tasks. Task 1 investigated a broad range of environmental issues and how the issues differed throughout the country. Task 2 addressed fish physiology and turbine physics. Task 3 investigated individual design elements needed for the refinement of the three concept families defined in Task 1. Advanced numerical tools for flow simulation in turbines are used to quantify characteristics of flow and pressure fields within turbine water passageways. The issues associated with dissolved oxygen enhancement using turbine aeration are presented. The state of the art and recent advancements of this technology are reviewed. Key elements for applying turbine aeration to improve aquatic habitat are discussed and a review of the procedures for testing of aerating turbines is presented. In Task 4, the results of the Tasks were assembled into three families of design concepts to address the most significant issues defined in Task 1. The results of the work conclude that significant improvements in fish passage survival are achievable.

  15. Robustness-based evaluation of hydropower infrastructure design under climate change

    Directory of Open Access Journals (Sweden)

    Mehmet Ümit Taner

    2017-01-01

    Full Text Available The conventional tools of decision-making in water resources infrastructure planning have been developed for problems with well-characterized uncertainties and are ill-suited for problems involving climate nonstationarity. In the past 20 years, a predict-then-act-based approach to the incorporation of climate nonstationarity has been widely adopted in which the outputs of bias-corrected climate model projections are used to evaluate planning options. However, the ambiguous nature of results has often proved unsatisfying to decision makers. This paper presents the use of a bottom-up, decision scaling framework for the evaluation of water resources infrastructure design alternatives regarding their robustness to climate change and expected value of performance. The analysis begins with an assessment of the vulnerability of the alternative designs under a wide domain of systematically-generated plausible future climates and utilizes downscaled climate projections ex post to inform likelihoods within a risk-based evaluation. The outcomes under different project designs are compared by way of a set of decision criteria, including the performance under the most likely future, expected value of performance across all evaluated futures and robustness. The method is demonstrated for the design of a hydropower system in sub-Saharan Africa and is compared to the results that would be found using a GCM-based, scenario-led analysis. The results indicate that recommendations from the decision scaling analysis can be substantially different from the scenario-led approach, alleviate common shortcomings related to the use of climate projections in water resources planning, and produce recommendations that are more robust to future climate uncertainty.

  16. Desire to Bargain and Negotiation Success: Lessons About the Need to Negotiate from Six Hydropower Disputes.

    Science.gov (United States)

    BURKARDT; LAMB; TAYLOR

    1998-11-01

    / We investigated the notion that successful negotiations require that all parties to the dispute must have a desire to bargain. This desire is most likely to be present when the dispute exhibits ripeness and each party believes a bargained solution is the most cost-effective way to resolve differences. Structured interviews of participants in six Federal Energy Regulatory Commission hydropower licensing consultations were conducted to determine the level of need to negotiate for each party. The findings indicate that a need to negotiate is a necessary, but not sufficient, condition for success. Several factors were associated with a need to negotiate: a weak BATNA (best alternative to a negotiated agreement); a salient issue; participants' sense of efficacy; a sense of inevitability; professional roles encouraging negotiation; and disputes about facts as opposed to disputes about values. Participants' need to negotiate fluctuated throughout the process and intensified when questions were ripe: i.e., critical issues were debated or the regulatory process required action.KEY WORDS: Alternative dispute resolution; Federal licenses; Federal Energy Regulatory Commission; Instream flow; Environmental planning

  17. MULTIPLE CRITERIA DECISION MAKING IN STRATEGIC PLANNING OF TABLE EGG PRODUCTION

    Directory of Open Access Journals (Sweden)

    Ana Crnčan

    2016-06-01

    Full Text Available The main research objective was to analyze and evaluate different systems of table egg production by using the multiple criteria analysis, the method of Analytic Hierarchy Process (AHP in decision making within strategic planning of production. The survey involved 79 producers of table eggs registered in the Records on laying hens’ farms in the Republic of Croatia. In the first stage, the research defined the criteria and sub-criteria for system evaluation which were compared in pairs in order to determine the weight or importance for each of them. Alternatives were evaluation based on definition of priorities of examinees and the extent to which they meet each of the defined criteria and sub-criteria. Intensity of examinees’ preferences were entered into the Expert Choice software in order to evaluate ranking results of egg production systems. Defined model consisted of a quantitative criterion of economic indicators, and the other two referred to qualitative criteria, market indicators and technical-technological factors. Each criterion had its corresponding sub-criteria that were evenly distributed in numerical order. Based on individual assessments of the examinees, overall cumulative evaluation was obtained for the table egg production systems. Accordingly, the most acceptable alternative to egg production is the indoor keeping system (priority 0.301. It is followed by the free-range system of keeping laying hens (priority 0.253. The third-ranked alternative is egg production by hens kept in conventional cages (priority 0.226, while the fourth-ranked least acceptable alternative, as of the total evaluation, is the ecological system of egg production (priority 0.220. Taking into account the obtained results of multiple criteria evaluation as well as EU and world trends in changing consumers’ habits including food safety and quality as well as customers’ preferences towards local market and local products, it is recommended that eggs

  18. Hydropower in the Amazon: renewability and non-renewability of energy policy. Since is desired the search for renewable energy conversion why not renew the energy policy as well?

    Directory of Open Access Journals (Sweden)

    Francisco Del Moral Hernandez

    2012-12-01

    Full Text Available The essay intends to discuss, with the background of the recent hydroelectric plants under way in the Brazilian Amazon, aspects relating to processes of environmental licensing, conceptual problems that concern the characterization of hydropower conversion as clean and renewable energy. This work starts from the analysis of government plans and discussions on hydropower projects, identifying the need to implement institutional changes and strengthen environmental laws and the protection of the rights of traditional and indigenous populations. We propose a new way of formulating energy problems and energy supply planning, which takes into consideration sustainable aspects and the public discussion, beyond understanding and incorporating the effects on the major biogeochemical cycles that support energy conversions.

  19. Hierarchical production planning model in flexible job shop including a preemption and sequence-dependent setup times

    Directory of Open Access Journals (Sweden)

    Juan Carlos Osorio Gómez

    2008-05-01

    Full Text Available Production planning and control are complex problems for manufacturing organisations. Hierarchical production planning and control is one way to address the problem as it can reduce its complexity and reach good solutions in reasonable computational time. This paper presents a hierarchical approach to resolving production programming in a flexible job shop configuration; this problem includes pre-emption and sequence-dependent setup times. Al-though non-optimal (as expected, good solutions were obtained as shown in the validation of the method.

  20. CFD modeling and simulation of a hydropower system in generating clean electricity from water flow

    National Research Council Canada - National Science Library

    Akinyemi, Oladapo S; Liu, Yucheng

    2015-01-01

    ...) modeling and simulation. Performance of paddle wheels in producing hydropower out of running water under different speeds was evaluated, and effects of side and bottom fins and paddle wheel shape on power generation were...