Comparative Analysis of CCHP Systems Based on Different Gas Turbine Cycles Applied in North of China

CCHP (Combined Cooling, Heating & Power) system is a highly efficient and flexible way to utilize natural gas, which attracts more and more attention. Two systems are presented for a vacation village in north of china, both of which generate electricity with gas turbine and utilize natural gas as fuel. One of systems adopts Brayton cycle, and the other adopts recuperative cycle. The analysis focuses on the influence of the outlet temperature of heat-recovery boiler, the efficiency of gas fired boiler and the ratio of thermal load and power load on the primary energy ratio and the exergy efficiency, when the systems are running in northern china of winter. The results can provide reference for the design and lectotype of CCHP system.