地下换热管热形变测试与比较  

Measurement and contrast on thermal deformation of the ground heat exchange pipe

作　　者：王有镗 单丹 王延平[3] 朱晓林[4] WANG You-tang;SHAN Dan;WANG Yan-ping;ZHU Xiao-lin(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China;The Urban and Rural Planning and Designing Institute of Jilin Province,Changchun 130000,China;School of Architectural Engineering,Shandong University of Technology,Zibo 255049,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049 [2]吉林省城乡规划设计研究院,吉林长春130000 [3]山东理工大学建筑工程学院,山东淄博255049 [4]中国科学院电工研究所,北京100190

出　　处：《山东理工大学学报（自然科学版）》2018年第4期12-18,共7页Journal of Shandong University of Technology:Natural Science Edition

基　　金：山东省自然科学基金项目(ZR2016DL08;ZR2017LEE031)

摘　　要：影响地下换热器运行可靠性的重要因素是其温度应变对换热结构的影响,为此针对地下换热管结构热形变问题进行了研究.利用应变测量法开展地下换热管形变与位移测试的实验研究,通过实验模拟地下置管环境,验证算法及其有效性,并进一步实验研究换热管回填态下的热形变过程.结果表明:将应变测量法应用于换热管热形变测试研究中具有较高的适用性;不同的回填形态对换热管热形变和位移产生明显影响,抑制或利于其形变发生;同时,其结构形变趋势由初始置管形态决定.因此,回填形态和初始置管形态对于其热形变和位移蠕动具有重要影响.Thermal transformation of the underground heat exchange structure,caused by temperature changes,is a key factor affecting the operation reliability of the ground heat exchanger.The thermal structural deformation of the heat exchange pipe was carried out to explore its thermal behavior.The strain measuring method was applied in the experimental study of heat exchange pipe′s structural de-formation and displacement.The effectiveness and accuracy of strain measuring method was verified in preliminary simulated environment.Furthermore,the pipe′s thermal deformation was analyzed in the backfill status.The results showed that strain measuring method was applicable and could be conducive to the deformation monitoring of heat exchange pipe and different backfill conditions would result in ei-ther inhibitory or facilitative effect on pipe′s thermal deformation and displacement.Besides,the tendency of structural deformation depended on the initial shape of the borehole pipe.Therefore backfill conditions and the initial shape of borehole pipe significantly affect the pipe′s thermal deformation and displacement.

关 键 词：地下换热器 换热管 热形变 应变 

分 类 号：TK523[动力工程及工程热物理—热能工程]