水文地质参数对单井回灌地下水源热泵抽水井温度场影响

Hydro-Geologic Status on the Temperature of Water in Aquifer Surrounded by the Well of Standing Column Well Heat Pumps

采灌区温度差的变化将直接影响到热泵机组的工作效率和工程的持续利用寿命,而采能条件下水文地质参数是温度场演化的重要影响因素.应用FlowHeat有限差分模拟软件,对水文地质参数对承压含水层温度场的影响进行了数值模拟,结果表明:渗透率和孔隙度的综合作用、不同的孔隙度对抽水段温度的影响甚微,但是随着渗透比的升高,即竖直渗透率的降低,抽水温度的变幅不断减小.在其它条件不变时随着含水层的厚度越小,抽水段的温度变幅越大.

The temperature of water in aquifer surrounded by the well of the standing column well heat pump（SCW）,by direct effects of the hydrogeology conditions,will directly impact on the energy efficiency of the heat pump and the life of SCW system.The temperature of water in aquifer surrounded by the well of SCW was simulated in this paper by using finite-difference simulation software,FlowHeat.The results show that both the combined action between permeability coefficient and the porosity and the porosity of the soil around the well have little effect on temperature of the water in aquifer near the production segment of SCW,but the increase with the ratio of permeability—the decrease of the vertical ratio of permeability,the temperature change of water in aquifer of the pumping section will be decreased.When the other conditions have no change,the smaller the thickness of the aquifer,the larger the temperature change of water in aquifer of the pumping section.