地下水源热泵砂淤层阻塞试验系统研究

RESEARCH OF CLOGGING EXPERIMENT SYSTEM IN SANDLAYER FOR UNDERGROUND WATER SOURCE HEAT PUMP

提出针对地下水源热泵系统阻塞机理研究开发的砂层阻塞模拟试验系统。该观测系统采取透射式观测方案,可以实时、直接地观测砂层渗流的变化和阻塞物的空间时间变化;系统采用双向水流驱动,可以模拟地下水源热泵系统回灌和回扬的渗流条件;本试验系统可以同时模拟地下水砂层中颗粒、气泡和微生物运移并阻塞孔隙水流的过程以及其耦合作用,可为进一步解决具体技术问题,如采用水回灌、环境安全评估等提供必须的实验基础。最后通过对砂砾和玻璃珠颗粒作对比性试验,从试验结果得出试验系统在研究砂层淤堵机理上是成功的。

The sand clogging simulation test system was proposed for research and development of the obstruction mechanism of ground water source heat pump system. The observation system used transmission observation scheme which could real-time, directly observe the change of sand layer seepage and temporal and spatial change of obstruction. The system used two-way water flow drive, could simulate the seepage condition of reclamation and recover of underground water source heat pump system ; The test system could simulate the process of migrating and blocking pore water flow by particles, bubbles and microbe in the ground water sand layer and the coupling effect, could provide the integrant experimental basis for further solving specific technical problems, such as using water injection, environmental safety assessment, etc. Finally, the comparative test was performed using the sand and glass bead particles, the test results show that the mechanism research of sand siltation and clogging of the experimental system is successful.