Abstract:The combined cooling, heating and power ( CCHP) system driven by a small scale gas turbine is a booming new technology for efficient and clean production of energy. However, because of the fluctuations in the energy demand, the CCHP system frequently runs under off design points, especially under part load conditions, which results in performance deterioration. This paper presents a novel power regulation method of compressor inlet air heating for the part load operation of the CCHPsystem. The novel method is performed b' recirculating a fraction of the low temperature exhaust gas to the inlet of the gas turbine and thereby adjusting the inlet air temperature. Amathematical model of the CCHP system was set up, of which the small scale gas turbine OPRA16 simulation was implemented using the GateCycle software and calibrated by the real gas turbine data. The part load performance of the CCHP system by the novel power reduction method was compared with the conventional fuel flow method systematical implemented on most engines. Analysis results showthat the Fuel Energy Saving Ratio ( FESR) was enhanced by 5.1% point in summer and 21.6% point in winter. The conclusion can be drawn that the CCHP system in both summer and winter under the novel method achieves more energy saving than the conventional power reduction method.