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A Mathematical Model for Cooling Effect of Sprinkler on Smoke Layer

[+] Author Affiliations
S. C. Li

The Chinese People’s Armed Police Force Academy, Langfang; University of Science and Technology of China, Hebei, China

Y. Chen, D. Wei

The Chinese People’s Armed Police Force Academy, Langfang, China

D. Yang, X. Q. Sun, R. Huo, L. H. Hu

University of Science and Technology of China, Hebei, China

Paper No. HT2009-88018, pp. 7-13; 7 pages
doi:10.1115/HT2009-88018
From:
  • ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
  • Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer
  • San Francisco, California, USA, July 19–23, 2009
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4358-1 | eISBN: 978-0-7918-3851-8
  • Copyright © 2009 by ASME

abstract

A mathematical model for predicting sprinkler cooling effect on smoke layer was developed. Results of calculation showed that the temperature difference between droplets and smoke layer and the thickness of smoke layer are major factors of the cooling effect. The cooling effect might lose its efficiency when the sprinkler pressure became relatively high. Experiments were carried out to validate the model and compared with Morgan model. The experimental results show that temperatures predicted by the current model agree well with the experimental results when temperature difference is high. However Morgan model is more suitable for low temperature difference.

Copyright © 2009 by ASME

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