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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。
Proposed for the groundwater source heat pump system blockage mechanism research and development of sand blocking simulation test system. The observing system adopts the transmissive observing scheme to observe the change of sand seepage and the spatial and temporal changes of obstruction in real time and directly. The system uses bidirectional flow drive to simulate the seepage condition of recharge and return of groundwater source heat pump system. The experimental system can simultaneously simulate the migration of particles, air bubbles and microorganisms and block the pore water flow in the groundwater sand layer and its coupling action, which may provide necessary experimental basis for further solving specific technical problems, such as using water recharge and environmental safety assessment . Finally, by comparing the gravel with the glass bead particles, the experimental results show that the experimental system is successful in studying the mechanism of silting.