Heat flux is an important parameter for characterization of the thermal impact of a fire on its surroundings. However, heat flux cannot be measured directly because it represents the rate of heat transfer to a unit area of surface. Therefore, most heat flux measurements are based on the measurement of temperature changes at or near the surface of interest [1,2]. Some instruments, such as the Gardon gauge [3] and the thermopile [2], measure the temperature difference between a surface and a heat sink. In radiation-dominated environments, this difference in temperature is often assumed to be linearly related to the incident heat flux. Other sensors measure a surface and/or interior temperature and inverse heat conduction methods frequently must be employed to calculate the corresponding heat flux [1,4]. Typical assumptions include one-dimensional conduction heat transfer and negligible heat loss from the surface. The thermal properties of the gauge materials must be known and, since these properties are functions of temperature, the problem often becomes non-linear.
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ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
July 11–15, 2004
Charlotte, North Carolina, USA
Conference Sponsors:
- Heat Transfer Division and Fluids Engineering Division
ISBN:
0-7918-4693-8
PROCEEDINGS PAPER
Measurement of Heat Flux From Fires
Cecilia S. Lam,
Cecilia S. Lam
University of Waterloo, Waterloo, ON, Canada
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Alexander L. Brown,
Alexander L. Brown
Sandia National Laboratories, Albuquerque, NM
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Elizabeth J. Weckman,
Elizabeth J. Weckman
University of Waterloo, Waterloo, ON, Canada
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Walter Gill
Walter Gill
Sandia National Laboratories, Albuquerque, NM
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Cecilia S. Lam
University of Waterloo, Waterloo, ON, Canada
Alexander L. Brown
Sandia National Laboratories, Albuquerque, NM
Elizabeth J. Weckman
University of Waterloo, Waterloo, ON, Canada
Walter Gill
Sandia National Laboratories, Albuquerque, NM
Paper No:
HT-FED2004-56896, pp. 235-240; 6 pages
Published Online:
February 24, 2009
Citation
Lam, CS, Brown, AL, Weckman, EJ, & Gill, W. "Measurement of Heat Flux From Fires." Proceedings of the ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. Volume 4. Charlotte, North Carolina, USA. July 11–15, 2004. pp. 235-240. ASME. https://doi.org/10.1115/HT-FED2004-56896
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