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地下含湿岩土热渗耦合模型及换热埋管周围土壤温度场数值模拟

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Indexed by:期刊论文

Date of Publication:2008-07-28

Journal:太阳能学报

Included Journals:EI、PKU、ISTIC、CSCD

Volume:29

Issue:7

Page Number:837-842

ISSN No.:0254-0096

Key Words:地下含湿岩土;U型换热埋管;多孔介质;热渗耦合;数值模拟

Abstract:考虑了地下水的渗流作用和U型换热埋管的实际形状,建立了U型管地下换热器管内流体以及周围土壤热渗耦合物理数学模型.模型将土壤视为均匀的、各向同性的饱和多孔介质,土壤中水的渗流视为二维.管内湍流流动采用Realizable k-ε模型,数值计算采用Fluent软件.给出了管内流体以及周围土壤的温度分布数值模拟结果,分析了土壤中水的渗流对传热过程的影响、U型管两支管的热短路作用及回填材料对土壤温度场的影响.所得结论对地下换热器的设计具有理论意义.

Pre One:The numerical simulation and experiment study on the coupled thermal conduction and groundwater advection heat transfer process under the intermittent operation of the ground-coupled heat pump system