کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8088731 | 1521904 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new solution for thermal interference of vertical U-tube ground heat exchanger for cold area in China
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کلمات کلیدی
GSHPASHPCOPGHEHTFGCHEGround Coupled Heat ExchangerHeat transfer fluid - انتقال حرارت انتقال مایعاتThermal interference - تداخل حرارتیOperation mode - حالت کاربریcoefficient of performance - ضریب عملکردPipe insulation - عایق لولهGround heat exchanger - مبدل حرارتی زمینیair source heat pump - پمپ حرارت منبع هواground source heat pump - پمپ حرارتی با منبع زمینی، پمپ حرارتی زمینگرمایی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper presents a new solution to reduce the thermal interference of vertical U-tube ground heat exchanger (UGHE): pipe insulation installed on the upward branch pipe of the U-tube. 3-dimensional numerical models of the UGHE with and without pipe insulation were developed to simulate the heat transfer process around the UGHE. The models were verified with previously published data. The effects of pipe insulation on outlet temperature, soil temperature, heat exchange rate per unit length of borehole depth and soil temperature recovery ratio were investigated. The effects of inlet velocity of heat transfer fluid (HTF) and the thermal conductivity of backfill material were also studied to fully assess the effects of the insulation. The results indicate that the average outlet temperature of HTF, soil temperature near the upward branch pipe and soil temperature recovery ratio all increased and the thermal interference can be effectively weakened when pipe insulation was installed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geothermics - Volume 65, January 2017, Pages 72-80
Journal: Geothermics - Volume 65, January 2017, Pages 72-80
نویسندگان
Xiao-Yan Li, Tian-Yang Li, Dong-Qi Qu, Jia-Wen Yu,