区域流场条件下抽灌模式对采能区地温场的影响

Impact of pumping and injection modes on groundwater temperature in energy extraction area with regional flow

以河南郑州某地下水源热泵空调系统为例,建立了三维地下水热耦合数值模型,通过实际水位水温观测资料校正了模型,并利用校正后的模型模拟和分析了有区域流场存在条件下不同抽灌模式对采能区地温场的影响.研究结果表明:有区域流场存在的条件下该实际工程不适合采用交替抽灌模式,在制冷期末该工程采用交替抽灌模式的抽水井温度比不采用交替抽灌模式上升了1.8℃,系统所能提供的能量负荷降低了22.76%.

This paper set up a three-dimensional groundwater flow and heat transport coupled model for a groundwater source heat pump system in Zhengzhou, Hehan, and calibrated the model with observed water level and temperature data, and then used the calibrated model to simulate changes of groundwater temperature under different pumping and injection modes with existence of regional groundwater flow. The simulation results showed that the alternate pumping and injection mode was not applicable to this groundwater source heat pump system when the regional groundwater flow existed. Under the alternate pumping and injection mode groundwater temperature rose by 1.8 ~C at the end of the cooling period with comparison to the temperature under the non-alternate pumping and injection mode, and the cold energy that the system could generate decreased by 22.76% in the meantime with existence of the real regional groundwater flow. 3figs., ltab., 10refs.