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Role of Water Temperature in Case of High Mass Flux Spray Cooling of a Hot AISI 304 Steel Plate at Different Initial Surface Temperatures
Experimental Heat Transfer
  • N. H. Bhatt
  • D. Chouhan
  • A. R. Pati
  • Priya Varshney
  • L. Das
  • Aditya Kumar, Missouri University of Science and Technology
  • For full list of authors, see publisher's website., For full list of authors, see publisher's website.
Abstract

In case of spray evaporative cooling, the heat transfer rate is controlled by various factors such as droplet renewal rate, Leidenfrost effect, and the rate of heat extraction by each droplet. In the current work, in case of high mass flux spray cooling (~55 kg/m2s), the heat extraction rate is tried to enhance by increasing the water temperature. Furthermore, from different initial surface temperatures (300°C-800°C), cooling experiments were conducted at various water temperatures (10°C-50°C). The surface temperatures and heat fluxes are calculated using an inverse heat conduction software (INTEMP). The result reveals that with the increasing water temperature, the heat removal rate rises in both transition and nucleate boiling regimes due to the increment of latent heat extraction time during the residence period of the water droplet on the hot plate. The maximum percentage in the enhancement of initial heat flux, average heat flux (AHF), and critical heat flux (CHF) are achieved in the nucleate boiling regime ( < 600°C); however, the increment in the transition boiling regime is also significant.

Department(s)
Materials Science and Engineering
Keywords and Phrases
  • drop renewal,
  • latent heat,
  • nucleate boiling,
  • sensible heat,
  • Spray cooling,
  • subcooling,
  • transition boiling
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2017 Taylor & Francis Ltd., All rights reserved.
Publication Date
9-1-2017
Publication Date
01 Sep 2017
Citation Information
N. H. Bhatt, D. Chouhan, A. R. Pati, Priya Varshney, et al.. "Role of Water Temperature in Case of High Mass Flux Spray Cooling of a Hot AISI 304 Steel Plate at Different Initial Surface Temperatures" Experimental Heat Transfer Vol. 30 Iss. 5 (2017) p. 369 - 392 ISSN: 0891-6152;1521-0480
Available at: http://works.bepress.com/aditya-kumar/48/