基于加热电缆的地源热泵岩土导热系数测试与验证研究  

TEST AND VERIFICATION OF THERMAL CONDUCTIVITY OF GROUND SOURCE HEAT PUMP ROCK AND SOIL BASED ON HEATING CABLE

作　　者：关鹏[1,2] 沈振强 段新胜 焦玉勇[1] Guan Peng;Shen Zhenqiang;Duan Xinsheng;Jiao Yuyong(Faculty of Engineering,China University of Geoscience,Wuhan 430074,China;Engineering Research Center of Rock-Soil Drilling&Excavation and Protection,Ministry of Education,Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074 [2]岩土钻掘与防护教育部工程研究中心,武汉430074

出　　处：《太阳能学报》2025年第1期328-334,共7页Acta Energiae Solaris Sinica

基　　金：国家重大科研仪器研制项目(42227805);国家自然科学基金重点项目(41731284);岩土钻掘与防护教育部工程研究中心开放研究基金(202311)。

摘　　要：岩土导热系数对地源热泵系统的设计和运行有重要影响。获取岩土导热系数的常规热响应试验设备水路电路复杂,存在易受外界干扰、稳定性差、成本高等问题。为解决上述问题,设计一种基于加热电缆的岩土热响应试验仪,以位于武汉市汉阳区的一口地埋管换热孔为研究对象,分别进行常规及加热电缆型热响应和热恢复试验,结合无限长线热源理论和热流叠加原理对各测试阶段的数据进行分析。结果显示加热电缆型热恢复试验精度较高,与常规热响应试验所测岩土导热系数相差仅为0.14 W/(m·K)。研究表明加热电缆型热响应和热恢复试验具有成本低、简单易操作且能获得不同深度地层的岩土导热系数等优势。Ground thermal conductivity has an important influence on the design and operation of Ground Source Heat Pump system.Conventional thermal response test rigs,used to assess the ground thermal conductivity,has complex water and electricity lines which lead to some problems,such as vulnerable to external interference,poor stability and high cost.A kind of ground thermal response tester using heating cable was designed to solve the above problems.Taking a borehole heat exchanger in Hanyang District of Wuhan City as research object,the conventional thermal response test,thermal response and thermal recovery tests using heating cable were carried out respectively,and the measurements of each test were analyzed by the infinite line source model and thermal superposition principle.The results reveal that the thermal recovery test using heating cable has higher accuracy,and the difference of the measured ground thermal conductivity is only 0.14 W/(m·K)comparing with conventional thermal response test.It is concluded that the thermal response and thermal recovery tests using heating cable have the advantages of low cost,simple and easy operation,and can obtain the ground thermal conductivities at different depth.

关 键 词：地源热泵 导热系数 电加热 热响应试验 热恢复试验 线热源理论 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]