双功能地下管群换热器的管间距分析

Analysis of Pipe Space Influence on Double Functions Geothermal Heat Exchanger

为分析有地下水渗流情况下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管间距问题,本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,从而分析了管间距对冬夏工况下不同联管方式管群换热器传热过程的影响,结果表明在冬夏工况下管间距影响不同,应根据具体的建筑负荷情况选择联管方式。

In order to analyze the pipe space influence on heat transfer of geothermal heat exchanger used in an Integrated Soil Cool Thermal Storage and Ground-Source Heat Pump System （ISCTS＆GSHP） under condition of groundwater advection, an overall solution is utilized to compute the whole temperature contour including fluid in pipe, pipe wall and the surrounding soil. The simulation results indicate that the space between pipes has different influence on winter and summer condition and the connection mode in winter should be decided according to actual building heating load.