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Sample records for cerite

  1. The new solar energy air conditioning system of CERIT (Pordenone, Italy). First experimental results

    Energy Technology Data Exchange (ETDEWEB)

    Lazzarin, R.; Casasola, L. (Bari Univ. (Italy). Ist. di Fisica Tecnica ed Impianti Termotecnici; CERIT SpA, Pordenone (Italy))

    For air conditioning in the CERIT (Regional Center for Technological Research) building of Pordenone (Italy), a solar plant was installed, with a surface area of 430 square meters of evacuated-tube collectors, a reflecting surface of the same area, and an absorption refrigerating system. Furthermore, this plant was equipped with a 43 cubic meter heat storage unit at the temperature of 80-90 degrees C and also a 150 cubic meter cold storage unit. The choice of the collectors was made after a series of tests on various models existing on the market. A careful calculation was carried out on the advantages of flat reflectors. An estimate, reflecting results after one year of operation, of the plant's performance was developed.

  2. CERIT air-conditioning system powered by solar energy: Two years of operation

    Energy Technology Data Exchange (ETDEWEB)

    Lazzarin, R.; Romagnoni, P.; Casasola, L. (Bari Univ. (Italy). Ist. di Fisica Tecnica ed Impianti Termotecnici CERIT S.p.A., Pordenone (Italy) Padova Univ. (Italy). Ist. di Fisica Tecnica)

    The largest European solar air conditioner (equipped with 440 square meters of aluminized Myler reflection panels; 440 square meters of Cortec evacuated tube solar collectors; 150 and 43 cubic meter, respectively, cold and hot water storage tanks; 50 kW absorption machine; 4 cylinder compression chiller; and natural gas fired boiler for winter space heating) was built at the CERIT (Regional Technological Research Center) of Pordenone, Italy. This article, with the aid of flowsheets, outlines the plant's key design and operational features, and tables performance and energy consumption data to back up a discussion of the major results achieved during two years of operation. Particular attention is given to the plant's seasonal performance.

  3. Two years of operation of a large solar cooling plant

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    Lazzarin, R.M.; Romagnoni, P. (Padua Univ. (Italy)); Casasola, L. (CERIT, Pordenone (Italy))

    1993-05-01

    A solar plant was installed with a surface area of 440 m[sup 2] of evacuated-tube collectors, a reflecting surface of the same area and an absorption refrigeration system for air-conditioning the CERIT building of Pordenone. A 43 m[sup 3] heat-storage unit, at temperatures of 80-90[sup o]C, and a 150 m[sup 3] cold-storage unit were also installed. These components form the largest solar cooling plant in Europe. After two years of operation, it is possible to evaluate the project as a whole, and to appreciate the contribution of the flat solar reflector and the working of the absorption unit. (Author)

  4. The petrogenesis of metamorphosed carbonatites in the Grenville Province, Ontario

    Energy Technology Data Exchange (ETDEWEB)

    Moecher, D.P.; Anderson, E.D.; Cook, C.A. [Univ. of Kentucky, Dept. of Geological Sciences, Lexington, Kentucky (United States)]. E-mail: moker@pop.uky.edu; Mezger, K. [Max-Planck-Institut fuer Chemie, Mainz (Germany)

    1997-09-15

    Veins and dikes of calcite-rich rocks within the Central Metasedimentary Belt boundary zone (CMBbz) in the Grenville Province of Ontario have been interpreted to be true carbonatites or to be pseudocarbonatites derived from interaction of pegmatite melts and regional Grenville marble. The putative carbonatites have been metamorphosed and consist mainly of calcite, biotite, and apatite with lesser amounts of clinopyroxene, magnetite, allanite, zircon, titanite, cerite, celestite, and barite. The rocks have high P and rare earth element (REE) contents, and calcite in carbonatite has elevated Sr, Fe, and Mn contents relative to Grenville Supergroup marble and marble melange. Values of {delta}{sup 18}O{sub SMOW} (9.9 - 13.3o/oo) and {delta}{sup 13}C{sub PDB} (-4.8 to -1.9o/oo) for calcite are also distinct from those for marble and most marble melange. Titanites extracted from clinopyroxene -calcite-scapolite skarns formed by metasomatic interaction of carbonatites and silicate lithologies yield U-Pb ages of 1085 to 1035 Ma. Zircon from one carbonatite body yields a U-Pb age of 1089 {+-} 5 Ma; zircon ages from two other bodies are 1170 {+-} 3 and 1143 {+-} 8 Ma, suggesting several carbonatite formation events or remobilization of carbonatite during deformation and metamorphism around 1080 Ma. Values of {epsilon}{sub Nd}(T) are 1.7 - 3.2 for carbonatites, -1.5 -1.0 for REE-rich granite dikes intruding the CMBbz, and 1.6 - 1.7 for marble. The mineralogy and geochemical data are consistent with derivation of the carbonatites from a depleted mantle source. Mixing calculations indicate that interaction of REE-rich pegmatites with regional marbles cannot reproduce selected major and minor element abundance, REE contents, and O and Nd isotope compositions of the carbonatites. (author)

  5. EXAMINATION OF TEACHERS’ ORGANIZATIONAL IMAGE PERCEPTIONS ABOUT THEIR SCHOOLS IN TERMS OF SOME VARIABLES

    Directory of Open Access Journals (Sweden)

    Celal Teyyar UĞURLU

    2013-06-01

    Full Text Available In our rapidly changing and developing world, organizations maintain struggle to survive in competition environment. This struggle forced the organizations to notice social factors as well as economic factors. One of the basic issues encountered by contemporary organizations is about how society perceives the organization. Organizations become more accountable to society nowadays and thus it becomes inevitable that they portray a positive image to be characterized as successful organizations. Image is a perception manner that emerges in thoughts of external participants which based on organization members for development and consist of vision, mission and values of the organization (Sabuncuoğlu, 2004. According to Hatch and Schultz (2002, image was described as overall thought about how organization creates an impression on members and others. Like other branches, education was effected by developments emerge in the current competition environment. Especially, new developments emerged right after progress of computer technologies did not enable staying in national borders and required to be operated in an international environment (Cerit, 2006. From the point of education institutions, experiences during application period, advertising and public relations and applicant providing activities are very important for the emergence of first perception and this perception plays a crucial role in decision to apply for a school (Collins and Stevens, 2001. This situation increase competition among high schools. To be a preferred high school by students, creating a positive organizational image is considered as a significant factor. Therefore, it was tried to determine teachers’ perceptions about images of high schools. At the same time, people create their perceptions about an organization as a result of interaction with this organization. For that reason, in determining level of organizational level, information related to this organization should be

  6. From the complex system leadership perspective: DNA leadership

    Directory of Open Access Journals (Sweden)

    Hasan Basri Gündüz

    2011-01-01

    management can be handled at various levels from ecosystem level to cell level (Odum, 1983. For example, human body is controlled by the brain that functions through billions of nerve cells and each of these cells is controlled by their DNAs that are placed in the nucleus. In fact DNA is the administrative unit of the cell or organism (Alberts, Bray, Lewis, Raff, Roberts & Watson, 1994; De Robertis & De Robertis, 1981. Therefore, the administration in one of the cell of the organism can be taken as a metaphor to explain the administration of an organisation in social system. Metaphors have a coherence and internal consistency, which provide insights into ideas that are not explicit or consciously held (Arnett, 1999; Tsoukas, 1991; Oxford et al., 1998; Cerit, 2008; Lakoff & Johnson, 2005; Şişman, 2002a; Morgan, 1998. Organizations within a social system can be considered as cells of the social system. Every organization has similar core structure as the cells of an organism that have the same DNA. Vision, mission, organizational culture and administrative approach of an organization constitute its core DNA. The degree of integration of an individual to an organization depends on how well he/she internalizes the philosophy, vision, mission and culture of an organization (Ball, 1997. Leader as an individual who shapes vision, mission and culture of the organization, should enable members to learn and accept organization’s vision, mission and culture. LeadershipLeadership is a subject that has long excited interest among scholars and layman alike. The term leadership means different things to different people. As is often the case when a word from the common vocabulary is incorporated into the technical vocabulary of a scientific discipline, leadership has not been precisely redefined, and it still carries extraneous connotations that create ambiguity of meaning. Further confusion is caused by the use of other imprecise terms such as power, authority, management