Dryout characteristics during flow boiling of R134a in vertical circular minichannels |
| |
| Authors: | Rashid Ali Björn Palm |
| |
| Affiliation: | 1. King Mongkut’s Institute of Technology Ladkrabang, Chumphon Campus, Chumphon 86160, Thailand;2. Department of Physics, Faculty of Science, Thaksin University, Phattalung 93110, Thailand;3. Fluid Mechanics, Thermal Engineering and Multiphase Flow Research Lab. (FUTURE), Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangmod, Bangkok 10140, Thailand;4. The Academy of Science, The Royal Institute of Thailand, Sanam Suea Pa, Dusit, Bangkok 10300, Thailand;1. IAV GmbH, DE-10587 Berlin, Germany;2. Heat and Mass Transfer Laboratory (LTCM), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;1. Boiling and Two-Phase Flow Laboratory (BTPFL), School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA;2. NASA Glenn Research Center, 21000 Brookpark Road, Cleveland, OH 44135, USA;1. Mechatronics Engineering Program, Sabanci University, Tuzla 34956, Istanbul, Turkey;2. School of Engineering and Design, Brunel University, Uxbridge, Middlesex UB8 3PH, London, UK;3. Sabanci University, Tuzla 34956, Istanbul, Turkey;1. Renewable Energy Research Group (RERG), Department of Building Services Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China;2. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China |
| |
| Abstract: | In this paper, the experimental results of dryout during flow boiling in minichannels are reported and analysed. Experiments were carried out in vertical circular minichannels with internal diameters of 1.22 mm and 1.70 mm and a fixed heated length of 220 mm. R134a was used as working fluid. Mass flux was varied from 50 kg/m2 s to 600 kg/m2 s and experiments were performed at two different system pressures corresponding to saturation temperatures of 27 °C and 32 °C. Experimental results show that the dryout heat flux increases with mass flux and decreases with tube diameter while system pressure has no clear effect for the range of experimental conditions covered. Finally, the prediction capabilities of the well known critical heat flux (CHF) correlations are also tested. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
