渗流对地下埋管换热器传热管间距的影响

Effect of Seepage on Tube Pitch of Underground Water Pipe Heat Exchanger

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管间距的影响,本文基于热渗耦合作用下的数学模型,采用整体求解方法模拟了冬、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,分析了地下水渗流对其传热过程的影响。结果表明在冬夏工况下管间距宜不同,地下水运动对温度场的影响明显,而且地下水流速越高影响越大。

To determine the effect of seepage on the tube pitch of vertical underground water pipe heat exchanger in the soil storage and ground - coupled heat pump system, this paper established a thermal seepage coupling mathematical model. Based on the idea of overall solution, author simulated the fluid flow in the pipes and the soil temperature field around the heat exchanger pipes on the summer and winter conditions. Furthermore, the effect of underwater seepage on the heat excharger were investigated. Results showed that the tube pitch of the heat exchanger should be different on the summer and winter conditions, the effect of underwater seepage on the temperature field is significant and the higher the seepage flowrate, the stronger the effect.