跨越饱和/非饱和土壤条件下竖直地埋管换热器传热特性研究  

Study on heat transfer characteristics of vertical underground tube heat exchanger crossing saturated/unsaturated soil conditions

作　　者：蔡学龙 王松庆[1] Cai Xuelong;Wang Songqing(College of Civil Engineering,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040

出　　处：《可再生能源》2020年第4期464-470,共7页Renewable Energy Resources

基　　金：国家自然科学基金(41702242)。

摘　　要：文章基于跨越饱和/非饱和土壤条件下竖直地埋管换热器所在土壤层的传热情况,采用数值仿真方法,研究了在有无渗流的条件下,各层土壤的径向传热情况。研究结果表明,渗流对土壤的径向传热影响较大,当土壤层中无渗流时,热量在U型管四周均匀地向外传递;当土壤层中有渗流时,平行渗流方向上土壤层的传热能力比无渗流时增加了7%,垂直渗流方向上土壤层的传热能力比无渗流时减少了3.8%。Based on the heat transfer of the soil layer where the vertical tube heat exchanger is located under saturated/unsaturated soil conditions,the paper uses numerical simulation methods to study the radial heat transfer of each layer of soil under the condition of seepage.The research results show that the seepage has a greater impact on the radial heat transfer of the soil.When there is no seepage in the soil layer,heat is evenly transmitted around the U-shaped tube;when there is a seepage in the soil layer,the soil layer is parallel to the seepage direction.The heat transfer capacity of the soil layer is increased by 7%compared with that without seepage,and the heat transfer capacity of the soil layer in the vertical seepage direction is reduced by 3.8%compared with that without seepage.

关 键 词：地埋管换热器 土壤层 渗流 

分 类 号：TK523[动力工程及工程热物理—热能工程] TU83[建筑科学—供热、供燃气、通风及空调工程]