夏热冬暖地区小型地源热泵制冷采暖系统实验研究

Study on Refrigeration and Heating by Small Ground source Heat Pumps System in the Hot Summer and Warm Winter Areas

介绍了作者自主设计的垂直埋管型土壤源热泵系统实验平台,针对夏热冬暖地区,浅层土壤含水量大且渗流速度快等特性,对浅埋土壤换热器的换热性能,不同的流量、埋管长度、埋管形式等对系统的影响,系统的节能效果等进行了研究。研究证明了在夏热冬暖地区,应用小型地源热泵制冷采暖系统,其采暖工况和制冷工况下系统能效比均可达到3.3左右,而机组能效比在采暖工况下可达3.9,在制冷工况下可达3.4。相比于普通空调,其采暖效果非常好,制冷能效也很高。小型地源热泵制冷采暖系统在夏热冬暖地区具有良好的适应性和节能效果。

This paper introduces the experiment platform of vertical ground source heat pump system that designed by the author, According to the characteristic of water-rich soil and seepage＇s faster velocity in the superficial earth in hot summer and warm winter areas, the heat exchanger＇ s performance, influenced by diflerenee flow, length and form of heat exchanger to the system, effect of energy saving are researched, etc. This research proves that in hot summer and warm winter areas, compared with conventional air conditioning, refrigeration and heating by small ground souree heat pumps system＇ s re frigeration and heating e fleet is very good, and the system energy efficiency can reach about 3.3 in heating conditions and cooling conditions. Under heating conditions the energy efficiency up to 3.9 units, refrigeration units working conditions up to 3.4. This system in the hot summer and warm winter areas has good adaptability and energy saving effect.