| 李铮,吕科锋,王海涛,成祖德,盛雪雷.分层渗流条件下地埋管群换热特性研究[J].安徽建筑大学学报,2022,30(): |
| 分层渗流条件下地埋管群换热特性研究 |
| Study on Heat Transfer Characteristics of Buried Pipe Group under Stratified Seepage |
| 投稿时间：2021-09-30 修订日期：2021-11-08 |
| DOI： |
| 中文关键词: 土壤源热泵 管群 地下水渗流 分层土壤 数值模拟 |
| 英文关键词: ground-coupled heat pump multiple pipes groundwater seepage multiple-layered soil numerical simulation |
| 基金项目:安徽省重点研发专项（202004a07020049）；安徽省重点研发专项（202004a07020019） |
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| 中文摘要: |
| 摘要：使用三维CFD方法对有地质分层和地下水渗流的竖直U型地埋管群模型进行数值求解。最终得到不同渗流速度、不同土壤孔隙率、不同管内流速和不同渗流方向下地埋管群的总换热量和土壤温度分布云图，并且分析了它们对地埋管群换热性能的影响。结果表明，地下水渗流对地埋管群换热器的换热性能影响显著，渗流速度越大地埋管群换热性能越好。但是随着渗流速度增加，管群的换热增幅会降低；土壤孔隙率越大，地埋管群换热性能越弱；管群换热量随着管内流速的增加而增加；相对于垂直方向渗流，对角线方向渗流会加大地埋管群的换热性能，因此管群布置优化有利于提高地埋管群的换热性能。 |
| 英文摘要: |
| Abstract:The three-dimensional Computational Fluid Dynamics method was used to numerically solve the vertical U-shaped buried pipe group model with geological stratification and groundwater seepage. Finally, the total heat transfer and soil temperature distribution maps of buried pipes with different seepage velocity, soil porosity, pipe flow velocity and seepage direction were obtained, and their effects on the heat transfer performance of buried pipes were analyzed.The results show that groundwater seepage has a significant effect on the heat transfer performance of buried pipe group heat exchanger, and the higher the seepage velocity is, the better the heat transfer performance of buried pipe group is.However, with the increase of seepage velocity, the increase of heat transfer decreases.The larger the soil porosity, the weaker the heat transfer performance of buried pipes.The heat transfer of tube group increases with the increase of flow rate.Compared with vertical flow, diagonal flow will increase the heat transfer performance of buried pipe group, so the optimization of pipe group layout is beneficial to improve the heat transfer performance of buried pipe group. |
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