地温空调井群运行对地下水影响的实验与模型研究

Experimental and Modeling Study on Influence of Ground Temperature Air-conditioning Well Group Operation to Groundwater Flow

为了探析地温空调开发利用对地下水系统的影响,以安阳市第五人民医院地温空调项目为研究对象,设计了2抽4回和2抽2回两种模式进行实验,构建了地下水动力学模型和水热耦合数学模型,然后对两种抽回灌模式下地温空调项目运行对地下水流场和温度场的影响进行了模拟;分析了不同抽回灌模式对地下水水位、水温的影响,并探索其变化过程和影响机理.研究结果表明:在不同抽回灌模式下,地温空调项目对地下含水层流场和温度场的影响存在差异,且单井回灌量越大,影响范围和幅度越大;另外在不同的运行时段,地下水传热的主导方式也有所不同.

This paper used the Anyang Fifth People＇s Hospital as the case of study. The experiments were implemented with the patterns of＂2 pumping wells and 2 recharging wells＂and＂2 pumping wells and 4 recharging wells＂. The change of groundwater flow field and temperature field in the two patterns designed in ground temperature air-conditioning project operation were simulated by using a groundwater hydrodynamic model and a hydrothermal coupling mathematical model. Results indicated that the influence of ground temperature air-conditioning project on groundwater flow field and temperature field were very different in different pumping-recharging patterns. The increase of single-well recharge quantity enhanced the influence scope and range,making it easier to form heat transfixion. The way of groundwater transferring heat via groundwater also varied during different running periods.