严寒地区土壤源热泵地埋管井况的模拟

针对严寒地区使用土壤源热泵系统的情况,利用DeST及瞬时系统模拟软件进行模拟,研究了严寒地区某住宅楼的土壤源热泵系统中不同的井况(井深及井间距),对地埋管周围的土壤平均温度及系统运行时长的影响。研究结果显示:相同井深条件下,井间距越大,系统运行时长越长,土壤平均温度越高;随着连续运行时间的增加,土壤平均温度及系统的平均COP值整体呈下降趋势,并确定了最佳井况。同时为严寒地区建立土壤源热泵系统的设计提供参考依据。

Simulation of Well Condition of Buried Tubes in Severe Cold Area

According to the condition of using soil source heat pump system in cold area,the simulation software of DeST and instantaneous system was used and the effect of different well conditions(well depth and well spacing)in the ground-source heat pump system of a residential building in a severe cold area on the average soil temperature and the system operating time around the buried pipe was studied.The results show that under the same well depth,the longer the interval between wells,the longer the system runs and the higher the average soil temperature.With the increase of continuous operation time,the average soil temperature and the system average COP decrease as a whole and the best well conditions is determined.At the same time,this paper provides a reference for the design of ground-source heat pump system in severe cold area.