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Published on Ormat Technologies Inc. (http://www.ormat.com) Home > Printer-friendly PDF Advanced Organic Rankine Cycles in Binary Geothermal Power Plants By admin Created 2010-01-18 10:54 CYCLES DE RANKINE 'a VAPEUR ORGANIQUE DANS LES CENTRALS GEOTHERMIQUES BINAIRES Uri Kaplan ORMAT Technologies, Inc. (November 2007) Keywords: Binary Power Plant, Organic Rankine Cycle, Matching and Optimization, Two-phase Geothermal Resources, High Enthalpy, Recuperator, Geothermal Combined Cycle, Geothermal Power Plants Abstract In the last two decades the binary geothermal power plant, utilizing the Organic Rankine Cycle (ORC), has become a preferred means of exploiting low to moderate enthalpy geothermal resources. It has been widely used to utilize the brine in existing single flash plants and in many other applications as an efficient and reliable way of employing a geothermal resource, in the form of brine only or brine and low pressure steam coming from a separator. Over the years the basic ORC has been improved and modified to better adapt the cycle to various conditions of the heat source. More then 800 MW of such plants are in operation, about 90% of them manufactured by Ormat. In this paper we describe some advanced versions of the Organic Rankine Cycle and their application for an efficient utilization of geothermal fluids having specific thermal and chemical properties Re'sume' Au cours des deux derni'eres de'cennies les centrales ge'othermiques binaires utilisant le cycle de Rankine a vapeur organique (ORC) out e'te' le proce'de' pre'fe're' pour l'utilisation de sources ge'othermiques 'a basse ou de moyenne enthalpie. Le Cycle de Rankine a e'te' utilise' pour la re'cupe'ration de la chaleur de l'eau chaude se'pare'e non utilise'e dans les centrales 'a vapeur et d'autres applications utilisant des sources ge'othermiques produisant de l'eau chaude seulement ou de l'eau chaude et de la vapeur 'a basse pression. Au cours des anne'es le cycle de Rankine 'a vapeur organique a e'te' modifie' et perfectionne' pour une meilleure adaptation aux conditions varie'es des ressources. Plus de 800 MW de telles centrales sont en fonctionnement, dont environ 90% construites par Ormat. Cet article pre'sente diffe'rentes versions de ce cycle qui permettent d'atteindre des rendements plus e'leve's ainsi qu'une adaptation aux proprie'te's thermiques et chimiques des fluides ge'othermiques. .PDF Image | Advanced Organic Rankine Cycles in Binary Geothermal
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