Period for Spontaneous Ignition of a Refuse Derived Fuel Pile
This paper presents the results of attempt to predict the period available for prevention of spontaneous ignition in a RDF (refuse derived fuel) pile. The heat transfer in a RDF pile was discussed for a case when the effect of convection is negligible. By analyzing the energy equation, it was inferred that the temperature in a large pile of RDF hardly becomes uniform. Assuming that the term representing the effect of the temperature rise on the thermal balance becomes appreciable compared to that representing the effect of the conductive heat transfer just before ignition, the period for the temperature rise to ignition was inferred. By comparing the period predicted by analysis to that observed at a fire, the size of the higher temperature region in the pile was inferred to be smaller than 3 m. Then, the available period from the detection of the temperature rise to the ignition of RDF piles of various sizes were predicted on the basis of the Frank-Kamenetskii theory. It is indicated that the available period drastically decreases with the increase of detection temperature. Also, the available period increases with the increase of the RDF size.
KeywordsSpontaneous ignition ignition process refuse derived fuel large pile fire
Unable to display preview. Download preview PDF.
- 1.RDF power station accident investigation technical committee, Mie Prefecture, RDF power station accident investigation interim report (2003), 1–20.Google Scholar
- 2.Audit committee, Mie Prefecture, Regular audit debrief report (Mie Prefecture RDF power station audit debrief report) in 2003 fiscal year (2003), 1–50.Google Scholar
- 3.RDF propriety management study committee, The Ministry of the Environment, Proper management strategy of RDF (2003), 1–15.Google Scholar
- 4.Electric power safety subcommittee RDF power station accident investigation working group, The Ministry of Economy, Trade and Industry, Electric power safety subcommittee RDF power station accident investigation working group report (2003), 1–42.Google Scholar
- 5.RDF power station accident investigation technical committee, Mie Prefecture, RDF power station accident investigation final report (2003), 1–46.Google Scholar
- 6.The Ministry of Public Management, Home Affairs, Posts and Telecommunications Fire and Disaster Management Agency, Examination report of safety measures investigation of facilities related to RDF (2003), 1–234.Google Scholar
- 7.L. Gao, T. Tsuruda, T. Suzuki, Y. Ogawa, C. Liao, Y. Saso, Possibility of Refuse Derived Fuel Fire Inception by Spontaneous Ignition, Proceedings of 6th Asia-Oceania Symposium on Fire Science & Technology, 102–107, Daegu, Korea, March 17–20, 2004.Google Scholar
- 8.L. Gao, T. Tsuruda, Influence of RDF Properties on Spontaneous Ignition, Proceeding of Annual Meeting of Japan Association for Fire Science and Engineering (2004), 90–93.Google Scholar
- 9.T. Suzuki, T. Tsuruda, C. Liao, Y. Ogawa, Y. Saso, L. Gao, A Study on Self-heating of RDF-5, Report of National Research Institute of Fire and Disaster, No. 98 (2004), 91–96.Google Scholar
- 10.T. Tsuruda, The Numerical Simulation of Concerning Heat Ignition of RDF, Report of National Research Institute of Fire and Disaster, No. 99 (2004).Google Scholar