考虑特殊地层的分层热响应测试及模拟分析  

Layered thermal test and simulation analysis considering the special stratum

作　　者：董盛时 李晓昭[1] 赵鹏[1] 李明洪 Dong Shengshi;Li Xiaozhao;Zhao Peng;Li Minghong(School of Earth Science and Engineering,Nanjing University,Nanjing 210046,China)

机构地区：[1]南京大学地球科学与工程学院,南京210046

出　　处：《工程勘察》2018年第9期33-38,共6页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金资助项目(No.41272314);苏州科技计划项目(No.SYG201451)

摘　　要：目前地源热泵系统开发利用过程中的钻孔深度设计多依靠经验而缺乏定量的科学分析,且大都没有考虑某些影响换热的关键地层。鉴于此,该文以徐州覆盖型岩溶区为例,采用分层热响应测试的方法找出影响该地区钻孔换热的关键地层,并根据分层热物性参数开展数值模拟工作,研究不同钻孔深度对地埋管换热性能的影响。结果发现,并不是钻孔越深地埋管系统换热性能越好,有必要对存在关键地层的地区进行钻孔深度的优化设计,以降低成本。The borehole depth design of ground source heat pump system mostly depends on experience but lack of quantitative analyses at present,and mostly they did not consider the special stratums which influence heat transfer. A case study of layered thermal response test to find the key stratum that effects the heat transfer in a covered karst area in Xuzhou region is carried out in this paper. At the same time,numerical simulation was developed to study the influence of different borehole depth on the performance of buried pipe heat exchange. The results indicate it is not ture that the deeper the borehole depth,the better the heat transfer performance of buried pipe system will be. Optimal design of borehole depth is necessary to reduce the cost when the key stratum exist.

关 键 词：关键地层 分层热响应测试 分层导热系数计算 数值模拟 优化设计 

分 类 号：TU42[建筑科学—岩土工程]