Numerical SimulationofHeatTransferPerformance ofUGround-TubeHeatExchangers
[1]WUJinxin9,LIJuncha0,PANYankail,et al.Numerical SimulationofHeatTransferPerformance ofUGround-TubeHeatExchangers[J].Journal of Zhengzhou University (Engineering Science),2013,34(06):108-111.[doi:10.3969/j.issn.1671-6833.2013.06.026]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
34卷
Number of periods:
2013 06
Page number:
108-111
Column:
Public date:
2013-12-30
- Title:
- Numerical SimulationofHeatTransferPerformance ofUGround-TubeHeatExchangers
- Keywords:
- roundsource heat pump; heatexchanger; U—tubeground tube; thermalinterference; thermal insulating layer; numerical simulation
- CLC:
- TKl2；TK52
- DOI:
- 10.3969/j.issn.1671-6833.2013.06.026
- Abstract:
- A three—dimensional geometric model of single—U，double·U ground-tube heat exchangers and sur· rounding soil wasestablished in ground source heatPumpsystem．The effects ofdifferentborehole depth，flow velocity andthermal insulating layer on the heat exchanging quantity per well·-depth were researched by FLU·· ENT software．The temperature difference between the inlet and the outlet，theheat exchanging quantity per well．-depth and the thermal interference aboutsingle-U and double-U ground-tube heat exchangers were eom—· pared under the sameconditions．The resultsshow that the heat exchanging quantity perwell-depth ofdouble— Uground—tube heat exchangers increases 30％ormore，but their thethermal interference is more serious without thermal insulating layer．The influence of thermal interference can be reduced by the thermal insulating layer，which makesthe heat exchangingquantity per well—depth increase more than 15％，andcomprehensive performance of the double—U ground—tube wassuperior to single-U．The optimum length of the thermal insula— ring layer is 120 meters．
- References:
- [1]曾和义,方肇洪．双U型埋管地热换热器的传热模型[J]．山东建筑工程学院学报,2003 ,18( 1) : 11 -17.
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Last Update:
1900-01-01