基于实测数据构建燃气热泵系统中天然气发动机的多元回归模型和开式涡旋压缩机的计算模型，采用EES软件对燃气热泵系统进行性能计算，分析出口水温（tout）、发动机转速（Neng）、环境温度（tamb）及余热回收量对系统制热性能系数COP与一次能源利用率PER的影响。模拟研究表明：在同等条件下，不开启余热回收系统时，COP与PER随tout增加线性降低，模拟值与实测值的最大误差分别为1.62%与3.06%；同时，tamb对COP的影响较大，当Neng为1 500 r/min时，随着tamb从-15 ℃变化到24 ℃时，COP上升了225.87%，PER上升了217.26%；开启余热回收系统后，同等条件下的COP与PER分别提升了2465%和24.67%，且COP，PER变化的趋势发生了明显变化。

In this paper, based on the measured data, the multiple regression model of the natural gas engine and the calculation model of the open scroll compressor were constructed in the gas enginedriven heat pump system. The influence of outlet water temperature (tout), engine speed (Neng), ambient temperature (tamb) and waste heat recovery amount on coefficient of performance (COP) and primary energy ratio (PER) was analyzed by using the engineering squation solver (EES) software. The simulation study shows that when the waste heat recovery system is not turned on under the same condition, COP and PER decrease linearly with the increase of tout, and the maximum errors between simulated and measured values are 1.62% and 3.06% respectively; meanwhile, tamb has a greater impact on COP, when Neng is 1 500 r/min, as tamb changes from -15 ℃ to 24 ℃, COP increases by 225.87% and PER increases by 217.26%; after turning on the waste heat recovery system, the COP and PER under the same condition increase by 24.65% and 24.67% respectively, and the trend of COP and PER changes significantly

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国家重点研发计划项目（2021YFE0112500）