미분탄 입자의 크기 차이와 배열이 연소특성에 미치는 영향

The Effect of Coal Particle Arrangement and Size Difference on Combustion Characteristics

  • 김기덕 (고려대학교 대학원 기계공학과) ;
  • 김호영 (고려대학교 기계공학과) ;
  • 조종표 (한국에너지기술연구원 수송에너지연구센터) ;
  • 윤석구 (고려대학교 기계공학과)
  • 발행 : 2007.05.04

초록

The laminar combustion characteristics of interacting coal particles in a convective flow are numerically investigated at particle arrangement and size difference. The numerical simulations, which use the two-step global reaction model to account for the surrounding gas effect, show the detailed interaction among the inter-space particles, undergoing devolatilization and subsequent char burning. Several parametric studies, which include the effect of the gas temperature (1700 K), high pressure(10 atm) and variation in geometrical arrangement of the particle diameter on the volatile release rate and the char combustion rate, have been carried out. The comparison indicates that the shift to the multiple particle arrangement resulted in the substantial change of the combustion characteristics and that the volatile release rate of the interacting coal particles exhibits a strong dependency on the particle spacing and size difference.

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