燃气机、电驱动空气源热泵分析

Exergy Analysis of Gas Engine Driven and Electrically Driven Air Source Heat Pumps

基于平衡原理,建立燃气发动机驱动空气源热泵(以下简称燃气机热泵)、电驱动空气源热泵(以下简称电驱动热泵)的分析模型,探讨损流、效率、热力学完善度的计算方法。结合算例,对两种热泵制冷和制热工况下的损流、效率、热力学完善度进行计算。两种工况下,燃气机热泵的损流小于电驱动热泵,效率、热力学完善度大于电驱动热泵。两种热泵制热工况的效率均高于制冷工况。

Based on the principle of exergy bal- ance, the exergy analysis models of the gas engine driven air source heat pump （hereinafter referred to as the gas engine heat pump） and electrically driven air source heat pump （hereinafter referred to as the elec- tric heat pump） are established. The calculation meth- ods of the exergy loss flow, exergy efficiency and ther- modynamic perfect degree are discussed. Combined with examples, the exergy loss flow, exergy efficiency and thermodynamic perfect degree of two kinds of heat pumps under cooling and heating conditions are calcu- lated. The exergy loss flow of the gas engine heat pump is lower than that of the electric heat pump, but the ex- ergy efficiency and the thermodynamic perfect degree the gas engine heat pump are higher that of the electric heat pump under the heating and cooling conditions. The exergy efficiency of the two kinds of heat pumps under the heating conditions is higher than that under the cooling conditions.