城市地质2026，Vol.21Issue(2)：232-238,7.DOI:10.3969/j.issn.2097-3764.2026.02.012
地埋管传热仿真实验平台建设与传热性能研究
Construction of a thermal simulation platform for ground heat exchangers to study their thermal performance
摘要
Abstract
To investigate the variation patterns of heat transfer performance in ground heat exchangers(GHEs),a laboratory-scale thermal simulation platform was constructed based on the principle of heat transfer similarity.This sandbox experimental setup includes two sets of double U-tube boreholes,enabling the simulation of various geological conditions such as initial ground temperature and groundwater flow velocity,as well as operational conditions including single versus double U-tube configurations and heat rejection versus heat extraction modes.Comparative experiments were conducted on the heat transfer performance of GHEs in both dry and water-saturated strata using this platform.The results indicate that under summer heat rejection conditions,variations in the thermal conductivity of the stratum alter the ratio of heat exchange per meter between double and single U-tube GHEs.This ratio is higher in dry strata with lower thermal conductivity and decreases when the stratum becomes water-saturated due to increased thermal conductivity.The smallest ratio is observed under winter heat extraction conditions.During summer operations,a lower initial ground temperature leads to a greater enhancement in GHE heat exchange.Specifically,a 3℃ increase in the initial temperature of the bottom stratum reduces heat exchange by 6.5％.When the dry stratum becomes saturated with water,the heat exchange of the GHE increases by more than twofold.Additionally,increasing the groundwater flow velocity from 0.22 m·d-1 to 0.35 m·d-1 improves heat exchange efficiency by 13％,indicating a significant enhancement in heat transfer capacity.关键词
地埋管/相似原理/实验平台/延米换热量/传热Key words
ground heat exchanger/similarity principle/experimental platform/heat transfer rate per mete/heat transfer引用本文复制引用
刘爱华,李娟,梁桂星,许真瑞,李露露..地埋管传热仿真实验平台建设与传热性能研究[J].城市地质,2026,21(2):232-238,7.基金项目
省部级科技项目热渗耦合作用下地埋管换热器传热特性研究项目(11000023T000002056332)资助 （11000023T000002056332）
