土壤源热泵供冷供热运行特性的实验研究  

Experimental study on operation characteristics of ground coupled heat pump operated in cooling and heating mode

作　　者：杨卫波[1] 施明恒[2] 陈振乾[2] 

机构地区：[1]扬州大学能源与动力工程学院,扬州225009 [2]东南大学能源与环境学院,南京210096

出　　处：《东南大学学报（自然科学版）》2009年第2期276-281,共6页Journal of Southeast University：Natural Science Edition

基　　金：建设部研究开发资助项目(2008-K1-26);国家自然科学基金资助项目(50276013);扬州大学优秀青年骨干教师计划资助项目(2008年)

摘　　要：在已建成的太阳能-地热能综合利用多功能热泵实验台上,进行了土壤源热泵夏冬季节供冷供热工况的启动与间断运行特性实验.实测结果表明：实验土壤源热泵夏冬季运行的启动时间分别为8-9h与10h,其对应的单位长度埋管放热量与吸热量分别为46与24.6W/m,钻孔平均导热系数分别为3.4与4.95W/（m.℃）.同时,根据建筑负荷特性,采用可控间断运行方式,通过合理调节开停机时间比例,可以在满足建筑负荷要求的前提下,减缓埋管周围土壤温度随时间的变化率,提高单位埋管的换热能力,从而更有利于提高浅层地热能的利用效率.An experimental study on the startup and intermittent operation characteristics of a groundcoupled heat pump operated in cooling and heating mode, respectively was performed in a solar-geothermal multifunctional heat pump experiment system. The measurements indicate that the startup period of the experimental ground-coupled heat pump are about 8 to 9 h and 10 h for cooling and heating mode, respectively, the corresponding average heat flux per unit buried coil length are about 46 and 24.6 W/m and the average thermal conductivity of borehole are 3.4 and 4. 95 W/（ m ·℃ ）, respectively. It also shows that the intermittent operation mode, which is based on the load characteristic of building and can be achieved by adjusting the ratio of operation time to stop time rationally, can slow down the variation rate of ground temperature and increase the heat transfer capacity per unit buried coil length, and thus can enhance utilization efficiency of shallow layer geothermal energy.

关 键 词：土壤源热泵 供冷供热 启动特性 间断运行 实验研究 

分 类 号：TU831.1[建筑科学—供热、供燃气、通风及空调工程]