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Experimental Investigation of Flow Boiling in a Vertical Narrow Channel

[+] Author Affiliations
Ewelina Sobierska, Klaudia Chmiel, Rudi Kulenovic, Rainer Mertz

University of Stuttgart, Stuttgart, Germany

Paper No. ICMM2005-75124, pp. 41-47; 7 pages
doi:10.1115/ICMM2005-75124
From:
  • ASME 3rd International Conference on Microchannels and Minichannels
  • ASME 3rd International Conference on Microchannels and Minichannels, Part B cont’d
  • Toronto, Ontario, Canada, June 13–15, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4185-5 | eISBN: 0-7918-3758-0
  • Copyright © 2005 by ASME

abstract

Experimental investigations on thermofluid-dynamic phenomena in a vertical narrow rectangular microchannel with the hydraulic diameter dh = 0.27 mm were carried out. The experiments are performed under fluid-inlet subcooling conditions with de-ionised and degassed water for different mass fluxes (50–2000 kg/m2 s) and heat fluxes (2–150 kW/m2 ). Moreover, flow visualisation of the two-phase flow patterns along the channel is performed using a digital high-speed video camera. Investigations on pressure drop during single- and two-phase flow have been carried out. The present work is concentrated on two-phase heat transfer. The mean heat transfer coefficient and the local heat transfer coefficient at saturated conditions were calculated and the latter ones was compared with available correlations.

Copyright © 2005 by ASME

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