Exergy analysis of energy conservation for combined cooling heating and power systems

Applying the exergy analysis method, defines the equivalent generating exergy efficiency. Analyses the energy conservation for common combined cooling heating and power (CCHP) systems. Considers that compared with national average coal consumption for power supply, energy conservation of a CCHP system is conditioned, suitable mode and optimal design and operation scheme should be made; compared with some heat and power plants which are in shortage of heat load in summer, CCHP saves energy. Ratio of energy conservation is 7.8%~39% depending on different conditions. Suggests that a CCHP system should be developed by using existing conditions in order to improve the equipment capacity factor and operation economical efficiency.