CFD Modeling of Spontaneous Heating in a Large-Scale Coal Chamber

Details

• Personal Author:
  Smith, Alex C. ; Yuan L
• Description:
  Three-dimensional computational fluid dynamics (CFD) modeling is conducted to simulate spontaneous heating in a large-scale coal chamber with a forced ventilation system. Spontaneous heating is modeled as the low-temperature oxidation of coal using kinetic data obtained from previous laboratory-scale spontaneous heating studies. Heat generated from coal oxidation is dissipated by convection and conduction, while oxygen and oxidation products are transported by convection and diffusion. The water vapor transfer and the effect of heat of wetting are not modeled. The CFD model is validated by comparing simulation results with test results from U.S. Bureau of Mines experiments conducted in the coal chamber. The model predicts lower temperatures in the early stage but agrees well on the induction time for spontaneous heating. The effects of airflow rate and order of reaction on the spontaneous heating process are also examined. The calibrated CFD model is found to be useful for predicting the induction time for spontaneous heating in underground coal mines. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Environmental Monitoring Hot Temperature Laboratories Mining Occupational Exposure Occupational Health Safety Software Temperature Ventilation

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• Keywords:
  Author Keywords: Coal CFD Modeling Coal-miners Coal-mining Coal-processing Coal-workers Computer-models Exposure-assessment Exposure-levels Exposure-methods Heat Heat-conduction Heat-exposure Laboratory-techniques Laboratory-testing Mine-workers Occupational-exposure Occupational-hazards Oxidative-processes Spontaneous Heating Ventilation-equipment Ventilation-systems

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• Series:
  Mining Publications
• ISSN:
  0950-4230
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRL - Pittsburgh Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  426-433
• Volume:
  22
• Issue:
  4
• NIOSHTIC Number:
  nn:20035458
• Citation:
  J Loss Prev Process Ind 2009 Jul; 22(4):426-433
• Contact Point Address:
  Liming Yuan, Pittsburgh Research Laboratory, National Institute for Occupational Safety and Health, P.O. Box 18070, Cochrans Mill Road, Pittsburgh, PA 15236
• Email:
  lcy6@cdc.gov
• Federal Fiscal Year:
  2009
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Loss Prevention in the Process Industries
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:8f1813184cd199759346441ba085d93c9a1d75ef696162e854d5da4c3cfd59708fd20571b602887a59ce270e365a274d94ae26b7ba585f96394ebdd34a43de12
• Download URL:
  https://stacks.cdc.gov/view/cdc/227095/cdc_227095_DS1.pdf
• File Type:
  [PDF - 632.69 KB ]