含水层参数对同井回灌地下水源热泵的影响

模拟分析了含水层厚度、渗透系数比和不同含水层对同井回灌地下水源热泵地下水渗流和换热的影响．对于合理的水井设计，含水层厚度增大可以减小抽水、回灌压力，显著地提高抽水平均温度．抽、回水口的平均降深与渗透系数比的对数基本成线性关系．从热贯通的角度来说，渗透系数比是同井回灌地下水源热泵系统工程成败的关键．过小的渗透系数比显著加快系统的热贯通．渗透系数大小是抽水和回灌难易程度的决定因素．对于渗透性能不好的含水层，更应该关注抽水和回灌不能时含水层渗透系数产生影响。

Effect of Aquifer Parameters on Groundwater Heat Pump with Pumping and Recharging in the Same Well

Effect of aquifer thickness, ratio of permeability coefficient and different aquifers on groundwater seepage and heat transfer caused by groundwater heat pump with pumping and recharging in the same well (GWHPPRSW)is analyzed through numerical simulation. For a rationally designed well, the increase of aquifer thickness can reduce the pressure of pumping and injection, and remarkably enhance the temperature of pumping. The value of mean pumping and recharging drawdown is linear to the logarithm of permeability coefficient ratio (horizontal/vertical) . In respect of thermal transfixion, the permeability coefficient ratio determines the success or failure of GWHPPRSW. The heat transfixion will be increased remarkably if the permeability coefficient ratio is too small. The permeability coefficient is the key factor to pumping and injection. With poor permeability , it should be paid more attention that pumping and injection should have no effect on the permeability coefficient.