基于Mutipole方法对竖直单U型地埋管换热器钻孔内外的耦合传热过程进行求解,在钻孔内三热阻和四热阻简化传热模型基础上,详细地分析钻孔内的复杂稳态传热过程,参数化研究埋管布置结构、回填料与岩土热物性等因素对钻孔内埋管间直接传热热阻的影响规律,揭示导致钻孔内埋管间负热阻现象的本质原因,对钻孔内热阻传热模型的工程实践应用给出参考意见。
Abstract
This paper solves the coupled heat transfer process inside and outside the borehole wall of a vertical single U-tube ground heat exchanger by using the Mutipole method, analyses the steady-state heat transfer process within the borehole based on the simplified three and four thermal resistance models, parametrically investigates the influence of the pipe layout, thermal properties of grout/soil and other factors on the direct thermal resistance between pipes in the borehole, reveals the mechanism of the negative thermal resistance phenomenon between pipes in the borehole, and some constructive suggestions have been proposed for the industrial application of the simplified thermal resistance model within borehole.
关键词
地源热泵 /
换热器 /
热阻 /
负热阻现象 /
Multipole法
Key words
ground source heat pumps /
heat exchanger /
thermal resistance /
negative thermal resistance phenomenon /
Multipole method
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参考文献
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基金
重庆市科技计划（YDZX20195000004938）
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