基于FLOW HEAT的地下水源热泵一抽多灌井群优化布置数值研究

Numerical Simulation of Ground-water Heat Pump System of Pumping with Multi-Irrigation Based on FLOW HEAT

为研究一抽多灌井群的最佳布置方式,基于FLOW HEAT软件,将抽水井附近的灌水井群采用集中环绕型、直线型等8种不同布置方式建立数学模型,分析抽水井水温变化规律、温度和渗流场及最佳井距。结果表明,采用以抽水井为中心回灌井环绕布置方式时井群影响范围较小,渗流效果也较好,但抽水井水温较高易发生热贯通现象;采用直线型布置方式时抽水井水温变化较慢、井群渗流效果一般;井群水温随井距的增加逐渐降低。综合考虑,抽水井在回灌井中间的直线型布置且井距为51.63m为最佳布置方式。

In order to study the optimal arrangement of an pumping with multi-irrigational well,based on FLOW HEAT software,the mathematical model of eight different arrangements,such as centralized arrangement and linear arrangement,was established for the irrigation well group near the pumping well,respectively.Analysis was conducted from the temperature,seepage field and optimal distance of heat well.The results show that the water temperature of pumping well was higher,the influence range was smaller and the seepage effect was better with the arrangement of multi-irrigation around the pumping well.However,the water temperature was lower and the seepage effect was general with the linear layout of the multi-irrigation near the pumping well.The water temperature of pumping well decreased for the increasing distances of well.After comprehensive consideration,the linear arrangement of irrigational wells near the pumping well,with the distance of well of 51.63 mis the optimal arrangement.