Experimental study on thermal characteristics of ammonia flow boiling in a plate evaporator at low mass flux |
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| Affiliation: | 1. Institute of Ocean Energy, Saga University, 1-48 Hirao, Kubara-aza, Yamashiro-cho, Imari, Saga 849-4256, Japan;2. Department of Mechanical Engineering, Saga University, 1 Honjo-machi, Saga 840-8502, Japan;1. College of Engineering, Ocean University of China, 238 Songling Road, Laoshan District, Qingdao 266100, China;2. Department of Naval Architecture and Marine Engineering, University of Strathclyde, Glasgow G4 0LZ, United Kingdom;1. Department of Refrigeration and Air-Conditioning Engineering, College of Engineering, Pukyong National University, San 100, Yongdang-dong, Nam-gu, Pusan 608-739, South Korea;2. Deep Ocean Water Application Research Center, Korea Ocean Research & Development Institute, 245-7 Oho-ri, Jukwang-myeon, Goseong-gun, Gangwon-do 219-822, South Korea;1. College of Power Engineering, Naval University of Engineering, Wuhan, 430033, PR China;2. Institute of Thermal Science and Power Engineering, Wuhan Institute of Technology, Wuhan, 430205, PR China;3. School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan, 430205, PR China;1. LNE, 29 avenue Roger Hennequin, 78197 Trappes, France;2. TOTAL, 2 place Jean Millier – La Défense 6, 92078 Paris La Défense, France;3. TENESOL, 12 allée du Levant, 69890 La Tour-de-Salvagny, France;1. College of Mechanical and Electrical Engineering, Hainan University, Haikou, Hainan, 570228, China;2. Institute of Environment and Plant Protection, Chinese Academy of Tropical Agriculture Sciences, Haikou, Hainan, 571101, China;3. School of Chemical Engineering and Technology, Xi''an Jiaotong University, Xi''an, Shanxi, 710049, China;4. Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK;5. The Institute of Seawater Desalination & Multipurpose Utilization, MNR, No.55, Hanghai Road, Nankai District, Tianjin, 300192, China;6. Laboratory on Convective Heat and Mass Transfer, Tomsk State University, 634045, Tomsk, Russia |
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| Abstract: | Thermal characteristics of a plate evaporator using ammonia are experimentally investigated. The effects of mass flux, heat flux, channel height, and saturation pressure on heat transfer coefficient of the evaporator are discussed. The experiments are conducted for mass flux (5 and 7.5 kg m?2 s?1), heat flux (10, 15, and 20 kW m?2), channel height (1, 2, and 5 mm), and saturation pressure (0.7 and 0.9 MPa). Heat transfer coefficient is obtained as a function of quality for all experimental conditions. The characteristics of heat transfer coefficient are discussed and compared with those of earlier works. All experimental results are compiled by using Lockhart–Martinelli parameter. The developed empirical correlation predicts 85% of the experimental data within ±30% range. |
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| Keywords: | Flow boiling Heat transfer coefficient Heat exchanger OTEC Lockhart–Martinelli parameter Écoulement en ébullition Coefficient de transfert de chaleur Echangeur de chaleur Thermique des océans (OTEC) Paramètre de Lockhart-Martinelli |
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