地层初始温度及结构对地埋管换热能力影响分析  

Influence of Stratum Initial Temperature and Structure on the Heat Transfer Capacity of the Buried Pipe

作　　者：李娟[1] 郑佳[1] 于湲[2] 郭艳春[1] LI Juan;ZHENG Jia;YU Yuan;GUO Yanchun(Beijing Geothermal Research Institute,Beijing 102218;Beijing Geology Prospecting&Developing Bureau,Beijing 100195)

机构地区：[1]北京市地热研究院,北京102218 [2]北京市地质矿产勘查开发局,北京100195

出　　处：《城市地质》2018年第1期64-68,共5页Urban Geology

基　　金：浅层地温能开发利用关键技术研究(1212011220841)

摘　　要：不同地质条件下,地埋管的换热能力有所不同,热能采集和扩散能力存在差异。为给地埋管地源热泵系统工程提供科学合理的设计依据,本文利用现场热响应测试数据分析了地层初始温度以及地层结构对地埋管换热能力的影响。结果表明:地埋管换热能力与地层初始温度呈较好的线性相关性,地埋管夏季延米换热量随地层初始温度的升高而减少,冬季延米换热量随地层初始温度的升高而增加;不同地层结构,地埋管换热能力有所不同,在富水性相对较好、岩性颗粒粗、地下水径流速度快的区域,地埋管换热效果要优于富水性相对较差、岩性颗粒细、地下水径流速度慢的区域。Under different geological conditions,the heat transfer capacity of the buried pipe is different,and the ability of thermal energy collection and diffusion is different too.In order to provide scientific and rational design basis for ground source heat pump system engineering,this paper studied the influence of initial temperature and structure of stratum on the heat transfer capacity of the buried pipe.The results show that the heat transfer capacity of the buried pipe is linearly related to the initial temperature of stratum.The heat exchange per meter decreases with the initial temperature of the stratum in summer and increases with the initial temperature of the stratum in winter.Under different structural conditions,the heat transfer capacity of the buried pipe is different.The heat transfer effect of the buried pipe is better in areas with higher water-richness,thicker lithologic grains and faster groundwater runoff than those with relatively poor water-richness,fine lithologic grains and slow groundwater runoff.

关 键 词：浅层地温能 地埋管换热能力 地层结构 初始温度 

分 类 号：TK52[动力工程及工程热物理—热能工程]