流体机械

2012, v.40;No.477(03) 56-59+63

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地源热泵U型管换热器夏季工况试验分析
Test and Analysis for U-tube Heat Exchangers of Ground-source Heat Pump in Summer

蔡颖玲;张华;朱朔祎;林志坚;顾佳伟;徐凯;喇楠祺;
CAI Ying-ling1,2,ZHANG Hua1,ZHU Shuo-yi 2,LIN Zhi-jian2,GU Jia-wei2,XU Kai2,LA Lan-qi2 (1.University of Shanghai for Science and Technology,Shanghai 200093,China;2.Shanghai University of Engineering Science,Shanghai 201620,China)

摘要(Abstract):

U型管换热器设计是土壤源热泵系统应用的关键,埋管深度、管内流速、土壤初始温度、运行模式等都是影响其性能的主要因素,利用上海地区所建设的不同埋深U型换热器(60m,90m)土壤源热泵试验装置,进行了夏季工况试验,测得热泵运行前土壤初始温度分布;测试了热泵机组间歇和连续运行时换热器的换热情况;还针对不同埋管内冷却水流速,测得到了单位孔深换热量,结果表明增加冷却水流速并不能一味地提高其每延米换热量,埋管内冷却水流速存在一个最佳值。
The design of the ground heat exchanges is the key of the GSHP system.Borehole depth,flow velocity,soil initial temperature,operating mode,etc.are the main factors that affect the performance of ground heat exchanges.It was tested the summer operating mode of the ground source heat pump system with different deep buried U-tube ground heat exchangers(60m,90m) built up in Shanghai district.It was presented the soil initial temperature distribution and the mean heat transfer capacity per unit borehole depth under the different operation modes and different flow velocity.The coefficient of performance of heat pump unit under different flow velocity is also presented.Results show that the increase in flow velocity is not simply raise the heat transfer capacity per unit borehole depth,there is a reasonable range for flow velocity within the U-tube.

关键词(KeyWords): 地源热泵;换热量;流速;性能系数
ground source heat pump;heat transfer capacity;flow velocity;coefficient of performance

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基金项目(Foundation): 上海市教委科研创新项目(09YZ372)

作者(Author): 蔡颖玲;张华;朱朔祎;林志坚;顾佳伟;徐凯;喇楠祺;
CAI Ying-ling1,2,ZHANG Hua1,ZHU Shuo-yi 2,LIN Zhi-jian2,GU Jia-wei2,XU Kai2,LA Lan-qi2 (1.University of Shanghai for Science and Technology,Shanghai 200093,China;2.Shanghai University of Engineering Science,Shanghai 201620,China)

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