基于Fluent/Matlab地下水逆流流速对热泵的影响

通过建立Fluent/Matlab协同仿真模型,可以动态模拟地下水源热泵运行特性,为拟建工程提供理论参考。通过模拟计算得知,地下水横流为逆流有助于抑制地下含水层的热贯通,随着逆流流速的不断增大,抽灌井群发生热贯通的时间不断延长。逆流流速越大,抽水温度波动幅度越小,机组的COP(EER)值及系统能效越趋于稳定。当地下水逆流流速处于较大流速时,回灌水对抽水井不产生任何影响,抽水温度维持地下水初始温度不变,机组的COP(EER)值及系统能效比均不发生变化。

The Influence of the Groundwater Flow Rate in Upstream Flow on the Groundwater Heat Pump Based on Fluent/Matlab

In this paper the performance of groundwater heat pump is dynamically simulated by establishing Fluent/Matlab co-simulation model ,which can be served as theoretical references for proposed project .Simulation indicates that the countercurrent helps suppress the heat transfixion of ground aquifer and with the increase of the countercurrent flow rate , time of heat transfixion will be extended .The greater the velocity of countercurrent ,the less the pump temperature fluctuates and the more stable the COP (EER) and the energy efficiency is .The pumping will not be affected by back irrigation with large velocity of counter current ,the pumping temperature will stay at the initial temperature of groundwater and so the COP (EER) and energy efficiency rate will all not be changed .