石炭の常温域からの自然発火: 等価酸化時間の導入による数値解析

Translated title of the contribution: Spontaneous combustion of coal in the low temperature range: Application of exposure equivalent-time to numerical analysis

Kyuro Sasaki, Hiroshi Miyakoshi, Kazuo Otsuka

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

This paper describes calculation concerning the temperature rise and the oxygen diffusion processes of a coal seam in the low temperature range. The temperature rise of coal occurs by the accumulation of heat produced by oxidation on the coal surface. The heat generation rate is a function of temperature, oxygen concentration and the exposure time of coal to an oxygen atmosphere. For the case where the oxygen concentration and the temperature around the coals vary with time, we have proposed a new method for estimating the heat generation rate. The authors have called this new method 'exposure equivalent-time'. This new method was applied successfully to simulate the temperature and the oxygen concentration in the coal seam model whose open-ends are exposed to the air. The finite-difference method was used to solve the equations of heat conduction and diffusion of air.

Translated title of the contributionSpontaneous combustion of coal in the low temperature range: Application of exposure equivalent-time to numerical analysis
Original languageJapanese
Pages (from-to)771-775
Number of pages5
JournalNihon Kogyokaishi
Volume103
Issue number1197
DOIs
Publication statusPublished - 1987

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Safety, Risk, Reliability and Quality
  • Earth and Planetary Sciences(all)

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