文档介绍：土壤源热泵地下埋管传热强化与控制的试验研究

杨卫波王松松刘光远张苏苏

(扬州大学能源与动力工程学院,江苏扬州 225127)

摘要为了寻求土壤源热泵地下埋管传热强化及其控制的有效措施,依据相似理论搭建了地下埋管换热
性能模型试验台,通过地下埋管换热器换热性能的实验测试,分析了不同回填材料、不同间歇运行控制模
式以及不同进口温度对地下埋管换热器周围土壤温度场及换热性能的影响。结果表明:导热性能好的回填
材料能有效提高地埋管的换热能力,但考虑到两支管间热短路的增加,回填材料导热系数并非越大越好。
同时,开停比为 1:1 和 2:1 间歇运行控制模式下的换热量比连续运行模式下分别高 7%和 %。此外,当
流体进水温度由 22℃增加到 35℃时,单位换热量由增加到 ,增幅为 %。研究结论对
改善地下埋管换热器传热性能具有重要的指导意义。

关键词土壤源热泵地下埋管传热强化试验研究

EXPERIMENTAL STUDY ON THE HEAT TRANSFER ENHANCEMENT AND
CONTROL OF GROUND HEAT EXCHANGER USED IN GROUND SOURCE
HEAT PUMP

Yang Weibo Wang Songsong Liu Guangyuan Zhang Susu
(School of Energy and Power Engineering, Yangzhou University,Yangzhou 225127)

Abstract In order to search for the effective measures of heat transfer enhancement of GHE and its operation
control used in ground source heat pump, a model experimental apparatus for the heat transfer performance test of
GHE was set up based on similarity theory. Through the experimental test of heat exchange performance of GHE,
the influences of different backfill materials, different intermittent operation control modes and different inlet
fluid temperatures of GHE on the heat transfer performance of GHE and its surrounding soil temperature field
were analyzed. The results indicate that a backfill with high thermal conductivity can improve the thermal
performanc