蓄热与释热过程中地层温度分布规律的研究

Study on temper ature distribution of under ground soil in the course of heat storage and heat release

通过对跨季节地源热泵系统的分析,在能量平衡和传热方程的基础上,建立了地层蓄热与释热的非稳态计算模型。分析了地层在蓄热与释热过程中,地下温度场的变化规律;比较了距离埋管不同位置处,沿深度方向的温度分布。研究表明,实际运行中,地层蓄热比地层释热的影响区域大;蓄热时,深部地层的温度低于靠近地表处地层的温度;地层释热时,深部地层的温度高于接近地表处地层的温度。

The ground-source heatpump was analyzed cross-season. Based on the energy balance and heat transfer equations, an unsteady state model of stratum heat storage and release was constructed. The variation laws of underground temperature field was analyzed in the course of heat storage and release. The temperatures along the depth were compared at different distance from pipe laying. The results showed that the effect field of heat storage is greater than the heat release; the temperature of deeper stra- tum is lower than the shallower＇s when heat was in storage ;the temperature of deeper stratum is higher than the shallower＇s when heat was released.