新型土壤源热泵热水复合系统运行特性仿真

Simulation on Operating Performance of New Ground-source Heat Pump and Hot Water Coupling System

为了解决传统土壤源热泵系统在建筑冷负荷较大地区长期运行后地下土壤热堆积、系统能效低等问题,设计了一种土壤源热泵热水复合系统,为建筑物供冷、供热和供生活热水。运用TRNSYS软件建立了土壤源热泵热水复合系统的动态仿真模型,运行仿真结果表明:设计的土壤源热泵热水复合系统能在建筑冷负荷较大的地区利用地下土壤堆积的热量为建筑物供冷、供热和供生活热水,运行稳定,系统平均制冷、制热系数峰值分别为6和4.29。

To solve the problem that the system performance of the conventional ground-source heat pump would decay after long-term operation,which is caused by the accumulation of thermal heat around soil-pipe exchanger underground where the building cold load is greater than the building heat load,a new ground-source heat pump and hot water coupling system is designed to supply cooling,heating and annual domestic hot water for the buildings. Then,the dynamic simulation model of the new coupling system is established using the TRNSYS software,and also,the operating performances during10 years are simulated and analyzed. The simulation results demonstrate that the new ground-source heat pump and hot water coupling system can effectively reduce the heat accumulation underground,and it can be efficient and stable to supply building with cooling,heating and annual domestic hot water in areas with greater building load. And the average peak of the system＇s cooling and thermal coefficient is up to 6 and 4. 29,respectively.