The Natural Gas CCHP System with Heat Pump and It's Experiment

摘要

Distributed energy system (DES) and its companion natural gas combined cooling,heating and power technology (CCHP) have attracted increased interest because of the high efficiency and environmental benefit.The natural gas is used to produce power through gas turbine or gas engine,at the same time,the surplus heat is recovered to heat or to drive absorption chillers for cooling.In the conventional CCHP system,the flue gas contains a lot of latent heat which accounts for 10% of the natural gas input energy,and this part of latent heat always has been discharged.In order to recover the latent heat of the flue gas,an absorption heat pump(AHP) is used.In this paper,the CCHP system with absorption heat pump is proposed,which uses the absorption chiller as heat pump,and recover the waste heat out of the engine including the flue gas condensation heat.The conventional CCHP system always includes the absorption chiller,which could be used as heat pump in winter,so the system's energy efficiency is improved and the operation cost is reduced,the superfluity initial cost can't be increased except a condensation heat exchanger.