小型土壤源热泵冬季间歇运行的地温恢复特性实验研究  

Experimental Investigation on Ground Temperature Restorative Characteristics under Intermittent Operation Condition in Winter for a Small Ground Source Heat Pump System

作　　者：罗仲[1] 张旭[1] 

机构地区：[1]同济大学机械与能源工程学院,上海201804

出　　处：《制冷技术》2015年第4期1-5,共5页Chinese Journal of Refrigeration Technology

摘　　要：本文利用土壤源热泵系统实验台,对上海某小型建筑土壤源热泵系统冬季间歇运行工况进行了实验研究,分析了不同运行时间比下地埋管周围土壤短期温度变化规律,并探讨了间歇运行后土壤温度的恢复对机组性能的影响。研究表明：间歇运行能够有效提升机组性能,单位管长取热量集中于（26~34）W/m;机组运行时间比越大,土壤平均温度恢复比越小,温度恢复速率越大。Based on the experimental rig of a ground source heat pump system （GSHP）, the experiments of a small building＇s GSHP in Shanghai under intermittent operation conditions in winter are carried out. The temperature changes of the soil around boreholes are analyzed and the influence of temperature restoration on the performance of unit is discussed. The research shows that the intermittent operation can effectively improve the performance of units, and the heat transfer per unit length of the borehole concentrats on （26-34） W/m. When the share of running time increases, the average ground temperature restorative ratio decreases but the restorative rate increases.

关 键 词：土壤源热泵系统 间歇运行 土壤温度 实验研究 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]