土壤源热泵夏季运行特性的实验研究  

EXPERIMENTAL STUDY ON THE OPERATIVE CHARACTERISTICS OF A GROUND-COUPLED HEAT PUMP IN COOLING MODE

作　　者：杨卫波[1] 施明恒[1] 陈振乾[1] 

机构地区：[1]东南大学能源与环境学院,南京210096

出　　处：《太阳能学报》2007年第9期1012-1016,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(NO.50276013)

摘　　要：根据对土壤源热泵夏季运行性能的实测,对夏季制冷工况的启动运行特性与间断运行特性进行了实验研究。实测结果表明,南京地区土壤源热泵夏季运行的启动时间为8～9h,其单位埋管放热量为44～49 W/m,平均传热系数为3.4W/(m·℃)。同时,采用可控间断运行方式可以在有效降低地下土壤温升率及机组进口温度以改善机组运行性能的同时,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 operative characteristics of a ground-coupled heat pump in cooling mode was performed. The measurements indicated that the startup period for the ground-coupled heat pump is about 8 - 10hours, the release heat flux per unit buried coil length and the mean heat transfer coefficient between buried coil and soil is about 44-49W/m and 3.4 W/（m·℃ ） respectively. The results may provide a preference for practical design of GCHP for Nanjing district area. It showed that the intermittent operation mode can minify the increasing rate of ground temperature and entering fluid temperature of heat pump, and thus it may improve the operation performance of heat pump. Moreover, the intermittent operation mode can also increase the heat transfer capacity per unit buried coil length and enhance utilization efficiency of shallow layer geothermal energy.

关 键 词：土壤源热泵 启动特性 间断运行工况 实验研究 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]