夏热冬暖地区三种地埋管换热器冬季换热能力的实验研究
Experimental investigation into heat exchange performance of three ground heat exchangers in winter in hot summer and warm winter zone
摘要：
搭建了实验台，研究了单U形管、双U形管和套管换热器分别在热泵连续运行与间歇运行方式下换热量随时间的变化趋势。结果显示，双U形管换热器的单位井深换热量最大，单U形管换热器次之，套管换热器最小；间歇运行方式比连续运行方式下的换热量大。
关键词：地埋管换热器,双U形管,单U形管,套管,换热量
Abstract：
Establishes an experiment system for single U tube, double U tube and tube-in-tube heat exchangers, studies the variation of the heat exchange with time during heat pump continuous and intermittent operating separately. The results show that the heat exchange per unit well depth of the double U tube heat exchanger is the largest, that of the single U tube heat exchanger takes the second place and that of tube-in-tube heat exchanger last, and that the heat exchange performance during intermittent operating is better than that in continuous operating.
Keywords:ground heat exchanger, double U tube, single U tube, tube-in-tube, heat exchange