Prediction of skin temperature of externally water cooled pipes under intense fires

R. B. Mansour*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A multiphase, multimode heat transfer numerical model was used to estimate the maximum skin temperature of a stagnant water-filled pipe structure subject to an intense flame. This transient two-dimensional mathematical model takes into account conduction, convection and radiation as well as evaporation of cooling water. Results have been obtained based on practical data and experimental field findings. The cooling water film that surrounds the pipe structure attacked by the flames, can originate from fire-fighting water hoses or from a sprinkler water system. Two different values of water film thickness of 3 and 5 mm are analysed. The simulation results indicate that the main parameter which controls the pipe skin temperature, is the water film thickness covering the pipe. Indeed the maximum steel pipe skin temperature drops from 175.5 to 108.8°C when the water film thickness is increased from 3 to 5 mm for the 20 inch-water-filled pipes. However the water presence inside the pipe has negligible effect on the pipe skin temperature.

Original languageEnglish
Pages (from-to)817-832
Number of pages16
JournalInternational Journal of Energy Research
Volume28
Issue number9
DOIs
StatePublished - Jul 2004

Keywords

  • Film cooling
  • Fire exposure
  • Multimode heat transfer
  • Multiphase
  • Skin temperature

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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