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Experimental study of temperature field distribution in ventilation ducts when the sediment is burning.

Author(s) : LIU Q., LI N., GUAN J., et al.

Summary

The ventilation and air-conditioning systems of buildings supply a comfortable environment for work and life; however, because of the existence of sediment in ventilation ducts, air-conditioning systems can play a role in the spreading of fire spread and diffusion in buildings. Therefore, this paper analysed factors influencing occurrence and spread of fire which were caused by sediment in air-conditioning systems. Experiments selected sawdust as a kind of sediment. In simulated fire scenarios, the resistance coil was used to ignite the sediment disposed in the ventilation tube. The scopes of the testing included temperature distribution and influential length of hot smoke in ventilation tube under fire circumstances. Numerous thermocouples were installed at various cross-sections and different measure dots within ventilation ducts to measure the temperature field. The results indicated that the factors such as air velocity and thickness of sediment had an influence on the speed of temperature distribution and length of hot smoke.

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Pages: ICR07-B1-506

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Details

  • Original title: Experimental study of temperature field distribution in ventilation ducts when the sediment is burning.
  • Record ID : 2008-0335
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/07/21

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