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世界地质 2017, 36(4) 1291-1296 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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| 基础地质 |
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地下水渗流对地埋管换热影响研究 |
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岳丽燕，黄贤龙，孟令军，孙晓林 |
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1. 天津地热勘查开发设计院，天津 300250; 2. 中水北方勘测设计研究有限责任公司，天津 300222 |
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摘要：
为研究地下水渗流对地埋管换热的影响，搭建地埋管换热研究试验台，模拟不同地下水流速 (0 m/a、100 m/a、200 m/a) 条件下的地埋管换热器，通过试验数据分析得出: 随着地下水流速的加大，将更多的热量带到下游，地埋管换热器的换热量和综合导热系数逐渐增加，对上、下游温度变化作用更明显，水流方向的热影响半径依次变大。地埋管换热器工程建设中应注重前期水文地质条件的勘察，对整个地源热泵系统工程能长期稳定运行起到关键作用。 |
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关键词：
地下水渗流
地埋管换热器
换热量
导热系数
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Effects of groundwater seepage on buried tube heat exchange |
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YUE Li-yan，HUANG Xian-long，MENG Ling-jun，SUN Xiao-lin |
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1. Tianjin Geothermal Exploration and Development-Designing Institute，Tianjin 300250，China; 2. China Water Ｒesources Beifang Investigation Design and Ｒesearch Co. Ltd，Tianjin 300222，China |
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Abstract:
To investigate the effects of groundwater seepage on the heat exchange of buried tube，the testing platform is set up to simulate buried tube heat exchanger under different groundwater flow (0m/a，100 m/a and 200m/a)． The test data shows that with the increasing flowing speed of groundwater，more heat is brought down- stream，and the amount of heat exchange and comprehensive thermal conductivity coefficient of buried pipe heat ex- changer increase gradually，resulting in obvious temperature changes in upstream and downstream，and bigger radi- us of heat influence along the flow direction． In the engineering construction of ground heat exchanger，it is empha- sized that the investigation of hydrogeological conditions in the early stage is important，which is critical for the long-term stable operation of the whole geothermal pump system． |
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Keywords:
groundwater seepage
buried pipe heat exchanger
amount of heat exchange
thermal conduc- tivity coefficient
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