燃气机热泵余热利用理论分析

摘要

对燃气机热泵余热利用方式进行了理论分析,从能量平衡角度分析了除霜的可行性,计算结果表明:除霜热量占余热回收总量的比值为6.5%～9.5%;在不同的除霜周内,制冷剂气化热量占回收余热总量的比值变化较大,最大不超过45%,从能量角度利用余热除霜是可行的;燃气机热泵的Cop可以提高30%,一次能源利用率在1.3～1.8,可见利用余热供热对提高燃气机热泵的性能系数具有重要的意义.%The methods of waste heat recovery from gas engine, heat pump ( GEHP ) were analyzed theoretically. From the aspect of energy balance, the feasibility of the waste heat defrosting method was discussed, the results showed that the waste heat for defrosting was small, accounting for 6. 5% ~9. 5% of the total waste heat, and the waste heat for refrigerant was less than 45% of the total waste heat, so the waste heat defrosting method was feasible. The waste heat can significantly improve the Cop and primary energy utilization rate of GEHP.