地源热泵间歇运行对地埋管换热器性能的影响

运用二维非稳态导热模型对地源热泵夏季间歇运行模式地埋管换热器的换热特征进行了数值模拟，分析了间歇运行模式对地埋管换热器性能的影响。热泵停机后各处平均温度及平均线热流密度在穿透时间内将延续换热器正常运行时的变化规律；在总运行时间相同的条件下，开停机次数适当增加，可以有效改善地埋管换热器的性能。

Influence of Intermittent Operation of Ground-source Heat Pump on Performance of Buried Tube Heat Exchanger

The numerical simulation of heat transfer characteristics of buried tube heat exchanger with intermittent operation mode of ground-source heat pump is performed using two-dimensional unsteady heat conduction model. The influence of intermittent operation mode on the performance of buried tube heat exchanger is analyzed. When ground-source heat pump is stopped, during the time of penetration, the average temperature and linear heat flux will change in the same way as the heat exchanger operates. Under the condition of same total operation time, the appropriate increase of start and shutdown frequency of the heat pump can effectively improve the performance of buried tube heat exchanger.