有渗流情况下地埋管管群传热特性分析  

Analysis of heat transfer characteristics of large multi-borehole ground with seepage

作　　者：胥清华 Xu Qinghua(Shandong Jianzhu University department of thermal engineering)

机构地区：[1]山东建筑大学热能工程学院

出　　处：《区域供热》2021年第2期94-100,共7页District Heating

摘　　要：地源热泵技术作为可再生能源之一,以浅层地热能为冷热源,实现低品质能量向高品质能量的转化。本文研究了在地埋管换热器埋深50m平面处的传热问题。针对有渗流情况下寒冷地区地埋管管群传热分析,通过matlab仿真软件进行模拟分析。研究表明随着系统规模扩大,负荷不平衡所带来的影响越来越显著,地埋管之间的热干扰越强烈。在渗流工况下土壤的温度分布存在一个过渡区域,该区域土壤温度由低到高再降低。此外,土壤的热扩散率越大,越能减缓地下水渗流作用下温度场的冷热量累积效应,使得地埋管的运行更加可靠。As one of the renewable energy sources, ground source heat pump technology uses shallow geothermal energy as a cold and heat source to achieve the conversion of low-quality energy to high-quality energy. In this paper, the heat transfer at the depth of 50 m in the buried tube heat exchange is studied. For the heat transfer analysis of buried pipe groups in cold areas with seepage, the simulation analysis was carried out by using matlab simulation software. Studies have shown that as the system scale expands, the impact of load imbalances becomes more and more significant, and the thermal interference between buried pipes becomes stronger. Under the seepage condition, there is a transition area in the temperature distribution of the soil, where the soil temperature decreases from low to high. In addition, the greater the thermal diffusivity of the soil, the slower the accumulation of cold and heat in the temperature field under the action of groundwater seepage, making the operation of buried pipes more reliable.

关 键 词：地源热泵 渗流 扩散率 冷热量 累积 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]