换热面积对高温热泵性能影响的模拟研究OA

A hybrid modeling approach coupling white-box models and black-box models is adopted to establish a hybrid model of the high-temperature heat pump.Combined with calculation examples,the influ-ences of evaporator area and condenser area on the operating performance of the heat pump are analyzed,and the critical evaporator area and critical condenser area that balance heat pump performance and eco-nomic efficiency are selected.When the condenser area is fixed,the evaporation temperature increases rapidly at first and then levels off with the increase of evaporator area.When the evaporator area is fixed,the condenser area exerts little influence on the evapora-tion temperature.When the condenser area is fixed,the heating capacity of the heat pump increases rapidly at first and then levels off with the increase of evapora-tor area.When the evaporator area is fixed,the con-denser area imposes little effect on the heating capac-ity.When the condenser area is fixed,the heating coef-ficient of performance(COP)of the heat pump increases rapidly at first and then levels off with the increase of evaporator area.When the evaporator area is fixed,the heating COP of the heat pump increases with the increase in condenser area,but the growth rate slows down gradually.Increasing the evaporator area can raise the evaporation temperature,and increasing the condenser area can reduce the condensation tem-perature,thereby improving heat pump performance.However,there exists a critical value.Beyond this criti-cal value,further increasing the evaporator or con-denser areas will not only lead to higher investment but also fail to effectively further raise the evaporation tem-perature or lower the condensation temperature.