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Calculation Model of Exergy Cost Based on Thermoeconomics Structure Theory and Thermoeconomics Accounting Mode

Thermoeconomics combines the thermodynamic analysis and economics evaluation, and simultaneously considers the thermodynamics and economics effect of the process of energy conversion in power plant. It becomes the focus of research. This paper mainly discusses the establishment method of the exergy cost equation in thermoeconomics structure theory, at the same time this method also combines with thermoeconomics accounting theory. Through the research, this paper presents a clear, simple, utility exergy cost equation established method. Compared with the chain differential principle, this method has the advantages of a simple form of expression and faster calculation speed. The method is applied to an actual 600MW power plant, established exergy cost equation and obtained the exergy cost for each component.The exergy cost concept is used to evaluate the production performance of the major equipment, to find the reason of production cost growing and direct the thermal power systems exergy optimization.