籾の薄層乾燥特性 I  [in Japanese] Thin layer drying characteristics of rough rice. (1).  [in Japanese]

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Abstract

試作した実験用乾燥装置を用いて, 絶対湿度一定条件の下で空気温度条件を30℃から50℃まで5段階および層厚みを7mm, 17m, 27mmと変えて, 籾の薄層乾燥実験を行った。この結果, 実用的に薄層と考えて良い層厚さは乾燥条件により異なる事が示された。また, 籾の薄層乾燥特性曲線は, 籾がら乾燥支配期間と玄米乾燥支配期間の2つの期間に大別される事が判明した。この傾向は籾の1粒子の乾燥特性曲線と良く一致したため, 薄層乾燥特性曲線をその薄層中に存在する籾粒子の平均乾燥特性曲線とみなしても良い事が示された。

Using a laboratory dryer, a series of thin layer drying experiments were performed on rough rice at five constant temperatures with absolute humidity of 0.01kg/kg' of air, changing the bed depth in three levels (7mm 17mm and 27mm). As the result, it was shown that the depth of a bed considered to be a thin layer in practical use was not fixed among differnt drying conditions.<br>It was also found that the whole drying period was divided into two drying stages, namely drying, first, takes place mainly in the hull and then drying rate becomes governed by the internal diffusion rate of grain kernel. Since this thin layer drying characteristics are similar to the single kernel drying characteristics, they are thought to be represented as the average drying characteristics of all single kernels in the bed.

Journal

  • JOURNAL of the JAPANESE SOCIETY of AGRICULTURAL MACHINERY

    JOURNAL of the JAPANESE SOCIETY of AGRICULTURAL MACHINERY 50(3), 69-76, 1988

    The Japanese Society of Agricultural Machinery and Food Engineers

Cited by:  1

Codes

  • NII Article ID (NAID)
    130004122466
  • NII NACSIS-CAT ID (NCID)
    AN00200470
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0285-2543
  • NDL Article ID
    3186462
  • NDL Source Classification
    RB57(農産--農業工学--農業機械・器具)
  • NDL Source Classification
    ZR7(科学技術--農林水産--農産)
  • NDL Call No.
    Z18-387
  • Data Source
    CJPref  NDL  J-STAGE 
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