Effects of the Convector Plate Shape and the Atmospheric Gas on Characteristics of Heat Transfer in a Batch Annealing Furnace

BAF에서 분위기 가스와 대류판 형태가 열전달 특성에 미치는 영향

  • Yoon, Soon Hyun ;
  • Kim, Moon Kyung ;
  • Kim, Dae Seong
  • 윤순현 (부산대학교 기계설계공학과, 기계기술연구소) ;
  • 김문경 (부산대학교 대학원 기계설계공학과) ;
  • 김대성 (부산대학교 기계기술연구소)
  • Published : 1996.08.01

Abstract

In a BAF(Batch Annealing Furnace), various studies have been pursued in order to reduce energy consumption rate to improve productivity and to stabilize the properties of products. The purpose of this study was to investigate the effects of both the atmospheric gas and convector plate shapes on the augmentation of heat transfer. The use of hydrogen instead of nitrogen as an atmospheric gas, combined with high convection in the BAF, has shown that considerable increases in furnace out put and significantly improved material quality are attainable. Because convector plate shapes make the atmosheric gas easily flow density, high diffusivity and reducing character of hydrogen, a better heat transfer rates resulting in uniform material temperature distribution and improved coil surface quality can be achieved. Also, it was found that the closed convector plate took more time for the annealing cycle time than the other plate type(open-type)by about ten hours.

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