Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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An air flow resistance model for a pressure cooling system based on container stacking methods

차압예냉에서 청과물 상자의 적재방법에 따른 송풍저항 예측모델 개발

  • Kim, Oui-Woung (Division of Convergence Technology, Korea Food Research Institute) ;
  • Kim, Hoon (Division of Convergence Technology, Korea Food Research Institute) ;
  • Han, Jae-Woong (Division of Bio-Industry Engineering, Kongju National University) ;
  • Lee, Hyo-Jai (Division of Convergence Technology, Korea Food Research Institute)
  • 김의웅 (한국식품연구원 융합기술연구본부) ;
  • 김훈 (한국식품연구원 융합기술연구본부) ;
  • 한재웅 (공주대학교 생물산업기계공학전공) ;
  • 이효재 (한국식품연구원 융합기술연구본부)
  • Received : 2012.11.12
  • Accepted : 2013.06.24
  • Published : 2013.06.30
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Abstract

The capacity of a pressure fan can be designed based on the air flow resistance of containers packed with fruits and vegetables in a pressure cooling system. This study was conducted to develop an air flow resistance model that was dependent on changes in the air flow rate and the method of stacking containers. The air flow resistance of a container packed with uniformly shaped balls was 1.5 times greater than the sum of the air flow resistance of a vacant container and that of a wire net container packed with only balls. In addition, the air flow resistance increased exponentially as the width of the stacks increased; however, the air flow resistance did not increase greatly as the length and height of the stacks increased, which indicates that the air flow resistance is primarily influenced by the width of the stack in the air flow direction. The air flow resistance in two lines of stacking was up to 17% less than that of the width of the stack. It was also possible to determine the air flow resistance using a function of the air flow resistance through a single container and develop a prediction model. A prediction model of air flow resistance that is dependent on the stacking method and the air flow resistance of a single container was developed.

차압예냉시스템을 설계하기 위해서는 송풍저항을 정확하게 예측해야 하며, 송풍저항은 청과물의 적재방법에 따라 크게 달라진다. 본 연구는 차압예냉시스템에서 송풍량에 따른 송풍저항식과 상자의 적재방법별로 송풍저항을 측정할 수 있는 모델을 개발하기 위하여 수행되었다. 공을 퇴적한 모형상자에서의 송풍저항은 빈 상자에서의 송풍저항과 공 퇴적층만의 송풍저항을 합한 값보다 1.5배 정도 높게 나타났다. 또한, 적재상자에서의 송풍저항은 통기폭 방향 적재상자수의 증가에 따라 지수적으로 증가하였으나, 적재길이와 적재높이의 영향은 거의 받지 않았다. 상자를 2열로 적재하는 차압예냉시스템에서 송풍저항은 1개 상자에서의 송풍저항을 기초로 예측이 가능하였으며, 예측모델을 제시하였다.

Keywords

References

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