Pressure drop during flow boiling inside parallel microchannels |
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| Affiliation: | 1. Department of Mechanical Engineering, LEPTEN, Centre of Technology, Federal University of Santa Catarina, Florianópolis, SC 88040-900, Brazil;2. Sistemas Térmicos y Transferencia de Calor, Departamento de Enxeñaría Naval e Oceánica, Escola Politécnica Superior, Universidade da Coruña, Campus de Ferrol, 15471 Ferrol, Spain;3. Aix-Marseille Université, CNRS, IUSTI UMR 7343, 13013 Marseille, France;1. Neutron Science Center, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea;2. Department of Mechanical Design Engineering, Pukyong National University, Busan 48547, Republic of Korea;3. Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea;4. Division of Advanced Nuclear Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea |
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| Abstract: | Pressure drop is experimentally investigated inside parallel microchannels during subcooled flow boiling of R134a in horizontal orientation. The test conditions included the inlet pressure, the inlet subcooled degree, the heat flux, the vapor quality, and the mass velocity, ranging from 600 to 900 kPa, 1 to 20 K, 5 to 220 kW m?2, 0 to 95% and 250 to 1000 kg m?2 s?1, respectively. The effect of the mass velocity and the inlet pressure were investigated. The relative weight of the pressure drop due to two-phase flow acceleration and the friction pressure drop for single phase and two-phase flows were considered. The experimental results for the pressure drop were compared with those predicted by the homogenous model and five other semi-empirical models. |
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