期刊
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
卷 26, 期 2, 页码 296-306出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ijheatfluidflow.2004.08.003
关键词
mini-channel; compact heat exchanger; heat transfer coefficient; dry-out; flow boiling
This article presents an experimental study of ascendant forced flow boiling in mini-channels with refrigerant R134a. A flat aluminium multi-port extruded tube composed of 11 parallel rectangular channels (3.28 mm x 1.47 mm) with hydraulic diameter of 2.01 mm was used. Mass flux ranged from 90 to 295 kg/m(2)s and heat flux from 6.0 to 31.6 kW/m(2). Two working pressures, 405 and 608 kPa, were tested. Inlet subcooling varied from 1 to 17 K. Heat transfer was found to be greater than that previously reported in the literature for conventional tubes, while dry-out occurred at low qualities. (C) 2004 Elsevier Inc. All rights reserved.
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