A review on exergy analysis in different energy sectors

.Limitation of energy resources in all over the world has forced countries to evaluate policies which is related to energy as well as taking some steps to prevent waste of energy. In developing countries using economized device and new techniques in order to improving utilization (efficiency) has been noticed. First law of thermodynamics states conversion of energy during a process, but the second law deals with energy quality, entropy generation, lost opportunities for doing work. Moreover it satisfies improving of qualities. Second law of thermodynamic is a valuable tool for optimizing complex thermodynamic systems. Exergy is a defined parameter to investigate potential of work. Maximum or minimum exergy is available entropy of effective (efficient) work from a system which reaches from one condition (status) to another one, in a specific process. In this study attempts have been made to review formers researches in optimization of different sectors of energy thoroughly.