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Experimental study of high altitude effect on heat release rates of pool fires using calorimeters

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Abstract

With the aid of same configured calorimeters as dimensions of 40% of that in ISO 9705 in Hefei (24 m, 100.8 kPa) and Lhasa (3650 m, 64 kPa), the influence of high altitude on heat release rate and combustion efficiency were investigated. Two groups of liquid pool fires of moderate sizes (D = 0.15, 0.25 m) with fuel level maintaining system were tested at two sites, respectively. Typical fuels with different sooting levels, i.e., N-heptane and Jet-A, were selected. The ambient air pressure effects were introduced by modifying the standard calculation method of heat release rate in ISO 9705. Experimental results indicated that the dimensionless burning intensity in the quasi-steady stage for both fuels could be accorded to pressure modeling with acceptable accuracy. And it could be correlated with radiation modeling well for Jet-A, while that of n-heptane failed and this may be explained by the flame convection feedback which could not be neglected for moderate sooty fuel of moderate sizes. The combustion efficiency at high altitude is slightly higher than that at atmospheric pressure, and it will gradually increase with the decreasing pool dimension regardless of the ambient pressure.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (No. 51376172) and the grant from the Research Grant Council of the Hong Kong Special Administrative Region, China (contract Grant Number CityU 11301015). The authors deeply appreciate that.

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Authors and Affiliations

  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, Anhui, People’s Republic of China

    Pan Li, Jiahao Liu, Mingyi Chen, Fengli Wang & Jian Wang

  2. Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, 999077, People’s Republic of China

    Pan Li & Richard Yuen

Authors
  1. Pan Li
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  2. Jiahao Liu
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  3. Mingyi Chen
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  4. Fengli Wang
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  5. Richard Yuen
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  6. Jian Wang
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Correspondence to Jian Wang.

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Li, P., Liu, J., Chen, M. et al. Experimental study of high altitude effect on heat release rates of pool fires using calorimeters. J Therm Anal Calorim 131, 1597–1603 (2018). https://doi.org/10.1007/s10973-017-6637-1

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  • DOI: https://doi.org/10.1007/s10973-017-6637-1

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