A Parametric Study on Exergy and Exergoeconomic Analysis of a Diesel Engine based Combined Heat and Power System

This paper presents exergy and exergoeconomic analysis and parametric study of a Diesel engine based Combined Heat and Power (CHP) system that produces 277 and 282 kW of electricity and heat, respectively. For this purpose, the CHP system is first thermodynamically analyzed through energy andexergy. Then, cost balances and auxiliary equations are applied to subsystems. The exergoeconomic analysis is based on specific exergy costing (SPECO) method. Finally, a parametric study is used toshow the effect of ambient temperature on important energy, exergy and exergoeconomic parametersof the CHP system. Also, effects of change in compressor pressure ratio and turbine inlet temperature on these parameters are investigated in different environment temperatures. The results show that increasing ambient temperature increases the work output, heating power and exergoeconomic factorand decreases the exergetic efficiency and cost of exergy destruction. Increasing compressor pressureratio leads to increase in the work output, heating power, exergetic efficiency, and exergy destruction cost and exergoeconomic factor of the CHP system in all environment temperatures. Also increasing turbine inlet temperature decreases the work output, exergetic efficiency and exergoeconomic factor, while increases the heating power as well as exergy destruction cost in all environment temperatures

کلیدواژه ها:

Energy ، Exergy ، Exergoeconomics ، SPECO ، Diesel Engine ، CHP