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分层土壤地下埋管换热器的一种优化方法

Journal of Tianjin Institute of Urban Construction(2012)

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Abstract
针对天津滨海新区100,m深土体分层的特点,根据分层土体内温度分布的数值模拟结果,分析了回填材料热阻与管间热阻相对大小的不同组合对换热器综合性能的影响.结果表明:由于埋管换热器中地下传热过程存在比较明显的"热短路"现象,换热管间垂直方向的热隔离能产生较明显的强化传热效果,从而提出了增加U型管管间热阻,以便提高埋地换热器换热性能的方法.
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Key words
U-shaped underground heat exchanger,GSHP,enhancement of heat transfer,numerical simulation
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