地下水流动对地下管群换热器传热的影响分析

HEAT TRANSFER ANALYSIS OF GEOTHERMAL HEAR EXCHANGER UNDER COUPLED CONDUCTION AND GROUNDWATER ADVECTION

为确定地下水渗流对土壤蓄冷与土壤耦合热泵集成系统中竖直地下管群换热器的影响,该文基于热渗耦合作用下的数学模型,采用整体求解方法求得冬、夏季工况下管内流体、地下埋管换热器及周围土壤的温度场数值解,从而分析了地下水渗流对其传热过程的影响,结果表明地下水运动对原温度场的影响明显,而且越高的地下水流速影响越大。

A comprehensive mathematical model for vertical GHE considering heat conduction and groundwater adveetion was developed using principle of energy conservation. And then a overall solution is utilized to compute the whole temperature contour including fluid in pipe, pipe wall and the surrounding soil. The simulation results indicated that groundwater flow has big influence on original temperature contour clearly, and the big groundwater velocity, the big effect.