The exergy, energy, enviroment and economic performance analysis of medium scale combined heat and power system

In this study, internal combustion based medium sized co-generation plant (157 kWh heat and 103 kWe) is analyzed according to 1st and 2nd laws of thermodynamic and energy equations and exergy destruction formulations has been established. Energy and exergy efficiency trends are examined for a variable range of operating loads. The system is examined for primary energy savings, power to heat ratio, electrical efficiency, heat efficiency, rational exergy management efficiency, primary energy and exergy savings and rational exergy based emissions performance. The results of energy, exergy and primary energy saving performance of the system is found to be increasing at rated performance (high engine speed).Co-generation system has been simulated with RETScreen Clean Energy Analysis Program. During the simulation studies, thermal load following, electrical load following and full load performances are examined for harmful emissions, energy production capacities and economical aspects. Heat load following performance of the system has found to be more economical, environmentally friendly and has a higher energy production capacity, compared with other operation methods.