基于土壤分层的双U型地埋管出口温度及土壤温度场研究  

Study on Water Temperature and Soil Temperature Field for Outlet of Double-U Buried Pipe Based on Soil Stratification

作　　者：王宏伟[1] 于川淇 安瑞 张芸栗[2] 于磊鑫 WANG Hongwei;YU Chuanqi;AN Rui;ZHANG Yunli;YU Leixin(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang,China,110168;School of Municipal and Environmental Engineering,Shenyang Urban Construction University,Shenyang,China,110167)

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]沈阳城市建设学院市政与环境工程学院,辽宁沈阳110167

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第2期338-344,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家重点研发计划项目(2017YFB0604001);辽宁省教育厅基本科研项目(JYTMS20231575)。

摘　　要：目的 探究在土壤分层和地下水渗流条件下地埋管的出口温度以及传热规律。方法 基于多孔介质理论建立分层岩土体瞬态三维模型,分析土壤的初始温度、地下水渗流、回填材料种类对地埋管出口温度及土壤温度场的影响。结果 土壤初始温度为290.15 K时,热泵运行30 d后地埋管的出口温度最高,达到280.43 K;三种常用的回填材料中沙土的换热效果最好,黏土作为回填材料时,地埋管附近出现明显的冷量堆积;地下水渗流速度达到200 m/a时,地埋管出口温度为280.85 K,相较于不存在地下水渗流时的出口温度增加了0.51 K。结论 土壤初始温度、地下水渗流速度均与地埋管出口温度呈正相关;土壤温度场的变化在一定程度上取决于回填材料的种类及热物性;地下水渗流的存在能够消除土壤冷量的堆积,在地埋管敷设时应适当增加沿着渗流方向管间距离。The outlet water temperature and the heat transfer of underground pipes under the conditions of soil stratification and groundwater seepage were studied.Based on the theory of porous media,a transient three-dimensional model of layered rock and soil mass was established.The effects of the initial temperature of the soil,the seepage of groundwater,and the type of backfill material on the water temperature and temperature field of soil at the outlet of the buried pipe were analyzed.The initial soil temperature and the groundwater seepage velocity are positively correlated with the outlet temperature of the buried pipe.The temperature field variation of the soil depends to some extent on the type of backfill material and the thermal physical properties.When the initial temperature of soil was 290.15 K,the outlet water temperature of the buried pipe reached 280.43 K after 30 days of heat pump operation.Among the three commonly backfill materials,sand’s heat exchange effect is the best,and when clay is used as backfill material there is a obvious cold accumulation near the buried pipe.When the groundwater seepage velocity reaches 200 m/a,the outlet water temperature of the underground pipe is 280.85 K,which is 0.51 K higher than that when there is no groundwater seepage.So the existence of groundwater seepage can eliminate the cold energy of soil accumulation,and the distance between the buried pipes along the seepage direction should be appropriately increased when laying underground pipes.

关 键 词：竖直双U型地埋管 出口温度 回填材料 地下水渗流 土壤温度 

分 类 号：TU833.3[建筑科学—供热、供燃气、通风及空调工程]