可再生能源2026，Vol.44Issue(1)：33-40,8.
基于不同G函数的U型中深层地埋管传热模型对比研究
Comparative study on heat transfer models of U-bend deep borehole heat exchanger based on different G functions
摘要
Abstract
The U-bend deep borehole heat exchanger(UDBHE)has a promising application po-tential.This paper is based on the G functions of infinite cylindrical source(ICS)and infinite line source(ILS)models,four heat transfer models of UDBHE are established,and they adopt the G function of ICS or ILS model,and consider or ignore the time-varying heat flow at the borehole wall,which are abbreviated as ICS-q,ILS-q,ICS-c and ILS-c models,respectively.The accuracy of the four models is studied by comparing with a more accurate two-dimensional numerical model and experimental data under two boundary conditions.The results show that the ILS-q model is the most accurate on the whole,and that the ICS-q model is the most accurate in analyzing the long-term performance of UDBHE.The four models have large errors in the early stage,but after enough long time,the errors of them are small except that the ILS-c and ICS-c models have large errors under the inlet temperature boundary condition.The errors mainly result from two aspects:the G functions of ICS and ILS models have some errors;ignoring the time-varying heat flow will cause some errors.The results can provide reference for the heat transfer model study of UDBHE.关键词
U型中深层地埋管换热器/G函数/传热模型/无限柱热源模型/无限线热源模型Key words
U-bend deep borehole heat exchanger/G function/heat transfer model/infinite cylindrical source/infinite line source model分类
能源科技引用本文复制引用
王昌龙,孙婉玉,郭艳春,蒋天茁,孙彦红..基于不同G函数的U型中深层地埋管传热模型对比研究[J].可再生能源,2026,44(1):33-40,8.基金项目
自然资源部浅层地热能重点实验室开放课题(KLSGE202401-15). （KLSGE202401-15）
