Heat transfer during condensation of moving steam in a narrow channel |
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| Authors: | MA Chernysheva SV Vershinin YuF Maydanik |
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| Affiliation: | 1. School of Energy and Power Engineering, HuaZhong University of Science and Technology, Wu Han 430074, China;2. School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China;1. CEMITEC Aditech, Tajonar 20, 31006 Pamplona, Spain;2. Dept. Ing. Nuclear y Mecánica de fluidos, Escuela Técnica Superior de Ingeniería de Bilbao, Universidad del País Vasco/E.H.U., Alameda de Urquijo s/n, 48013 Bilbao, Spain;3. Dept. Ing. Minero metalúrgica y de materiales, Escuela Técnica Superior de Ingeniería de Bilbao, Universidad del País Vasco/E.H.U., Alameda de Urquijo s/n, 48013 Bilbao, Spain |
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| Abstract: | The paper presents the results of experimental investigation of heat transfer and hydrodynamics during condensation of moving steam in a narrow channel of square cross-section 2 mm × 2 mm. The channel had a serpentine shape, the channel length was 660 mm. An experimental cell simulated conditions of heat transfer in the condenser of loop heat pipes. The steam velocity at the channel inlet ranged from 13 to 52 m/s, the pressure was 1 atm. The temperature of the cooling water varied from 70 to 95 °C. The annular flow pattern was noted in the whole range of the regime parameters. There was a clear boundary between the condensation zone and the zone occupied by the condensed phase downstream. Temperature has measured along the channel, and the heat-transfer coefficients have been determined. The coefficient values varied from 10,000 to 55,000 W/K m2 depending on the steam velocity at the channel inlet and the cooling temperature. The efficiency of the condenser – heat exchanger has been investigated. |
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