大庆地区地埋管地源热泵对土壤温度场的累年影响
Influence of ground-source heat pumps on soil temperature field in Daqing
摘要：
为研究适宜大庆地区地埋管地源热泵系统的运行方案，利用TRNSYS软件模拟了大庆地区某建筑的全年动态负荷和地埋管地源热泵不同运行模式、不同地埋管间距情况下土壤温度场及系统COP。模拟结果表明，大庆地区土壤温度恢复速率为0.45 ℃/月，在考虑土壤温度自身恢复和经济性的情况下，该地区冷热负荷相差25倍的建筑的地埋管间距应设置为6 m。若在类似大庆的严寒地区使用地埋管地源热泵系统对建筑供暖供冷，应适当增加地埋管间距并增加辅助装置来消除土壤热失衡。
Abstract：
In order to study the operation scheme of ground-source heat pump systems, simulates the annual dynamic load of a building, and the soil temperature field and system COP under different operation modes and different spacing of buried pipes of the ground-source heat pump in Daqing. The simulation results show that the soil temperature recovery rate is 0.45 ℃ per month. Considering the soil temperature recovery and economics, the spacing of buried pipes of buildings with 25 times of difference between cooling and heating loads should be set to 6 m. If a ground-source heat pump system is used for building heating and cooling in a severe cold zone like Daqing, the spacing of buried pipes should be increased and auxiliary devices should be added to eliminate the soil thermal imbalance.
Keywords:ground-source heat pump, severe cold zone, temperature field, buried pipe spacing, simulation, TRNSYS