Air-side performance evaluation of three types of heat exchangers in dry,wet and periodic frosting conditions |
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| Authors: | Ping Zhang P.S. Hrnjak |
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| Affiliation: | 1. Zhejiang Vocational College of Commerce, Hangzhou, Binwen Road 470, China;2. Department of Mechanical Science and Engineering University of Illinois at Urbana-Champaign 1206 West Green Street, Urbana, IL 61801, USA;1. Department of Human and Engineered Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, Japan;2. Department of Building Services Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong;3. College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, Shandong, China;4. School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, China;1. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China;2. State Key Laboratory for Manufacturing Systems Engineering, Xi’an 710049, China;3. Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an 710049, China;1. School of Energy and Environment, Southeast University, 2 SiPaiLou Road, Nanjing 210096, PR China;2. Jiangsu Huasheng Architecture Design Co., Ltd, Xuzhou 221006, PR China;1. Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Guangrong Rd 409, Beichen District, Tianjin 300134, China;2. International Centre in Fundamental and Engineering Thermophysics, Tianjin University of Commerce, Guangrong Rd 409, Beichen District, Tianjin 300134, China |
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| Abstract: | ![]()
The performances of three types of heat exchangers that use the louver fin geometry: (1) parallel flow parallel fin with extruded flat tubes heat exchanger (PF2), (2) parallel flow serpentine fin with extruded flat tubes heat exchanger (PFSF) and (3) round tube wave plate fin heat exchanger (RTPF) have been experimentally studied under dry, wet and frost conditions and results are presented. The parameters quantified include air-side pressure drop, water retention on the surface of the heat exchanger, capacity and overall heat transfer coefficient for air face velocity 0.9, 2 and 3 m/s, air humidity 70% and 80% and different orientations. The performances of three types of heat exchanger are compared and the results obtained are presented. The condensate drainage behavior of the air-side surface of these three heat exchanger types was studied using both the dip testing method and wind tunnel experiment. |
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