• Title, Summary, Keyword: modification of freeze dryer

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Modification of Conventional Freeze Dryer (진공동결 건조기의 개발에 관한 연구)

  • Park, Noh-Hyun;Kim, Byeong-Sam;Kang, Tong-Sam;Shin, Dong-Hwa
    • Korean Journal of Food Science and Technology
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    • v.20 no.3
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    • pp.350-356
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    • 1988
  • A pilot plant scale freeze dryer was designed and manufactured and its performance was tested. Freezing capacity of water vapor in the developed freeze dryer was 8㎏/batch and heating and defrosting methods were conduction and hot gas types, respectively. And exhausting time of vacuum pump was 7-8 minutes and temperature of cold trap was kept below $-50^{\circ}C$. In the freeze drying of fruits and vegetables, its optimum and maximum drying capacities were 2 and 4㎏/batch, respectively. Performance of the new freeze dryer was compared quite well with a foreign made freeze dryer.

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