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《Energy Conservation Technology》 2009-03
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Thermodynamic Analysis on Surface Water Source Freezing Latent Heat Collection System

QIAN Jian-feng1,2,ZHANG Ji-li1,SUN De-xing3 (1.School of Civil & Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China;2.School of Construction & Refrigeration Engineering,Harbin University of Commerce,Harbin 150028,China;3.School of Municipal & Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China)  
Winter surface water temperature in cold regions is low,thus surface water heat pump system with freezing latent heat collection device plays a significant role in energy-saving and environmental protection.Freezing latent heat exchanger is one of key devices in the heat pump system,and its operating parameters are directly related to the performance of the heat pump system.Based on entropy generation theorem,freezing latent heat exchanger is analyzed.Entropy production rate on the convective heat transfer,the ice heat conduction and the deicing cycle is deduced.With a calculation example,results illuminate that the flow friction entropy production rate of convective heat transfer process is 90% and dominative,and surface water flow rate determination and tube wall temperature choice in the heat pump system design should be weighted reasonably in order to ensure the system performance.
【Fund】: 北京市“供热供燃”气通风及空调工程”重点实验室开放课题(KF200710)
【CateGory Index】: TU831.6
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