A Study on the Thermal Characteristics of the Large Low Temperature Vacuum Dryer for Biological Drying

생체 건조용 대형 저온진공건조기의 열적 특성에 관한 연구

  • 김경근 (한국해양대학교 기관공학부) ;
  • 성부용 (산업기술평가원(ITEP)) ;
  • 정한식 (경상대학교 선박기계공학과) ;
  • 최순열 (군산대학교 기관공학과) ;
  • 문수범 (한국해양오염방제조합)
  • Published : 2000.07.01

Abstract

In tradition, there have been two kinds of drying methods, which are sun drying and artificial drying. The sun drying method which has been adopted traditionally has been replaced by the hot-air drying method which is one of the most general methods of artificial drying, with its simple drying system, low initial cost of drying plant, and easy operating method. But the hot-air drying method has some defects; (1) much energy loss happens due to the discharge of hot air during the drying process, (2) control of drying rate is not easy on account of changing relative humidity of inlet air for uniform hot air temperature, (3) high temperature of foods in drying process brings about the production of low-grade drying products. Vacuum drying takes advantage of energy saving and mass production because it reduces the drying time by increasing the drying rate under low temperature condition. The aim of this paper is to develop the low temperature vacum dryer, with low initial investments and operating costs, easy operating method and trouble-free operation.

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