地埋管地源热泵系统分层与均质模型对比分析  

Comparative Analysis of Layered and Homogeneous Models for Ground Source Heat Pump System

作　　者：张钰昕 王悦 周庭正 彭清元 刘贤燕 李勇 王勇 ZHANG Yuxin;WANG Yue;ZHOU Tingzheng;PENG Qingyuan;LIU Xianyan;LI Yong;WANG Yong(School of Civil Engineering,Chongqing University,Chongqing 400030,China;China Three Gorges Construction Engineering(Group)Corporation Limited Chongqing Nan'an District Guangyang Island Company,Chongqing 401133,China;Nanjiang Hydrogeological Engineering Team of Chongqing Bureau of Geological Exploration,Chongqing 402160,China;Chongqing Changxia Anji Architectural Design Corporation Limited,Chongqing 400042,China)

机构地区：[1]重庆大学土木工程学院,重庆400030 [2]中国三峡建工(集团)有限公司重庆市南岸区广阳岛公司,重庆401133 [3]重庆市地勘局南江水文地质工程队,重庆402160 [4]重庆长厦安基建筑设计有限公司,重庆400042

出　　处：《建筑科学》2023年第6期136-142,169,共8页Building Science

基　　金：重庆浅层地温能野外科学观测研究站开放基金课题(GCZ-202112)。

摘　　要：地质特征是影响地埋管地源热泵系统运行性能的主要因素之一。针对地埋管地源热泵系统,基于地质分层和均质的2种边界条件,分别建立了三维管群模型,并通过重庆某地源热泵项目多年的运行实测数据进行验证。结果表明,系统短期(3个月)运行时,2种边界条件下的地埋管出水温度计算结果基本一致,最大差异为0.1℃;分层模型和均质模型计算得到的岩土温度与实测结果差异分别为3.34%和8.19%,考虑实际的地质分层建立的模型结果更接近岩土真实温度分布。而系统长期(3 a)运行时,2种边界条件下的地埋管出水温度计算结果差异随运行时间的增加而增大,第3年两者差异达到1.4℃。上述2种地质条件以及长短期出水温度预测方法的研究结果,可为相关地埋管系统参数评价提供参考。Geological characteristics are one of the main factors affecting the performance of ground source heat pump systems.For the ground source heat pump system with buried pipes,three-dimensional pipe group models were established respectively based on the two boundary conditions of geological stratification and homogenization,and the models were verified using the operation measured data of a ground source heat pump project in Chongqing for many years.The results show that the calculation results of the outlet water temperature of the buried pipe under the two boundary conditions are basically the same when the system runs for a short period(three months),and the maximum difference between the two is O.1 C.The difference between the calculated and measured temperature of the layered model and the homogeneous model is 3.34%and 8.19%,respectively.The model results considering the actual geological stratification are closer to the real temperature distribution of rock and soil.In the long-term(three years)operation of the system,the difference between the calculation results of the outlet water temperature of the buried pipe under the two boundary conditions increases with the increase of the operation time,and the difference between the two reaches 1.4 in the third year.The research results of the above two geological conditions and the long-term and short-term outlet temperature prediction methods can provide a reference for the parameter evaluation of the relevant buried pipe system.

关 键 词：地埋管地源热泵系统 地质分层 均质模型 出水温度 岩土温度分布 

分 类 号：TK521[动力工程及工程热物理—热能工程]