| 地源热泵U型埋管换热器动态传热特性的数值分析 |
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| 引用本文： | 王泽生,颜爱斌.地源热泵U型埋管换热器动态传热特性的数值分析[J].河北工业大学学报,2009,38(1). |
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| 作者姓名： | 王泽生 颜爱斌 |
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| 作者单位： | 天津城市建设学院,能源与机械工程系,天津,300384 |
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| 基金项目： | 天津市教委高等学校科技发展基金 |
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| 摘 要： | 针对垂直U型换热器埋管及其周围回填材料和土壤传热过程,建立了将U型管壁的边界换热取为第三类对流换热条件的二维非稳态传热模型,并对处于土壤恒温区某一深度的动态传热特性,尤其是热流规律进行了数值模拟研究.分析结果表明,各处瞬时热流随时间推移存在不规则情况阶段、正常情况阶段以及准稳态阶段.各处进入准稳态阶段的时间主要取决于回填材料和土壤的热扩散系数,而准稳态阶段热流变化规律仅与导热系数有关,这对土壤导热系数现场测试具有重要的理论指导意义.
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| 关 键 词： | 地源热泵 U型管换热器 数值模拟 二维非稳态传热 |
Numerical Analysis on Unsteady Heat Transfer of U-tube Under-ground Heat Exchangers of Ground Source Heat Pump |
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| WANG Ze-sheng,YAN Ai-bin.Numerical Analysis on Unsteady Heat Transfer of U-tube Under-ground Heat Exchangers of Ground Source Heat Pump[J].Journal of Hebei University of Technology,2009,38(1). |
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| Authors: | WANG Ze-sheng YAN Ai-bin |
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| Affiliation: | Department of Energy Technique and Mechanical Engineering;Tianjin Institute of Urban Construction;Tianjin 300384;China |
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| Abstract: | A two dimensional transient heat conduction model is established using the convective boundary conditions ac- cording to the heat transfer process in U-tube heat exchanger, soil layer and different backfill materials. Numerical simu- lation is set up to analysis characteristics of the transient heat conduction, especially the heat flux in initial isothermal soil layer at some certain depth. The result shows that the transient heat flux in different places will experience the irregular process, regular proce... |
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| Keywords: | GSHP U-tube heat exchanger numerical simulation two dimensional transient heat conduction |
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