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在现有的U形地埋管地源热泵热水系统的基础上搭建了实验平台,研究了该地区不同运行工况下地埋管地源热泵的启动运行特性、制热性能系数COP、地埋管内循环水温度恢复规律、单位井深换热量及地埋管换热器的热影响半径。结果显示,该地区地埋管地源热泵供热工况下从启动到进入稳定换热的时间为6～9h,连续和间歇运行工况下COP的平均值分别为3.47和3.56,间歇运行工况下两个实验井的单位井深换热量比连续运行工况分别提高了6.6%和9.4%,两种U形地埋管换热器在48h内的热影响半径均在0.5～1.0m之间。
Based on the existing U-shaped ground-source heat pump hot water system, an experimental platform was set up to study the characteristics of start-up and operation of ground-source heat pump under different operating conditions in this area. The coefficient of heating performance COP, Tube circulating water temperature recovery law, the unit well depth heat exchange and heat exchanger tube radius. The results show that the ground-source heat pump in the area from start to enter the stable heat transfer time is 6 ~ 9h, continuous and intermittent operating conditions, the average COP were 3.47 and 3.56, intermittent operation In the two experimental wells, the heat transfer per unit well depth increased by 6.6% and 9.4%, respectively, over the continuous operation condition. The heat-affected radii of the two U-shaped underground tube heat exchangers were all within 0.5-1.0 m between.