地下水地源热泵回灌分析

推导了地下水地源热泵地下水渗流理论降深解,分析了无堵塞和考虑堵塞时地下水地源热泵异井回灌和同井回灌状况。无堵塞各向异性均质含水层中地下水地源热泵的灌压随着水平渗透系数的减小而急剧增加,渗透系数大小是回灌难易程度的决定因素。抽灌同井抗堵塞能力优于完整井和非完整井。水井堵塞显著增加地下水地源热泵的灌压,回扬对于减小系统灌压大有益处,尤其是对于回灌困难的系统。无论有无堵塞,对于同一含水层如果采用传统的异井回灌地下水地源热泵,从回灌效果来说均应优先考虑采用完整井的地下水地源热泵。

Analysis of injection for groundwater source heat pump systems

Deduces drawdown equations of groundwater seepage for the system. Analyses the respective injection condition of the system operating with pumping and recharging in different wells and in the same well. The injection pressure increases remarkably with decrease of the horizontal permeability coefficient in homogeneous anisotropy aquifer without clogging. Permeability coefficient is the key point to injection. The contra-clogging ability of the pumping and recharging well is greater than that of fully and partially penetrating wells. Clogging remarkably increases the injection pressure. Periodic backwashing is useful in reducing the injection pressure, especially to the system with difficult injection. Whether clogging or not, from point of view of injection, the system with fully penetrating wells should be adopted firstly if the conventional system with pumping and recharging in different wells is applied in the same aquifer.