精白米の吸湿過程における平衡含水率の測定 : 初期含水率の平衡含水率に与える影響  [in Japanese] Measurement of the Adsorption Equilibrium Moisture Content of Polished Rice : Effect of Initial Moisture Content on the Adsorption Equilibrium Moisture Content  [in Japanese]

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Author(s)

Abstract

精白米の吸湿特性を明らかにするため, 湿り空気通風による吸湿試験を行った。測定は風速32.4m/minの下, 温度10, 20, 30, 40℃, 湿度50, 60, 70, 80, 90%RHの条件で行い, 減率乾燥第一段式を吸湿に応用することで吸湿速度定数及び平衡含水率を整理した。また, 非線形最小二乗法の特殊解法により精白米における Chen-Clayton 式のパラメータを決定し, 吸着等温線を算出した。さらに,初期含水率の違いによる平衡含水率への影響についても実測を行い, その発生原因について若干の考察を行った。

The moisture adsorption properties of polished rice were investigated using a dynamic ventilatory method. Air temperatures of 10, 20, 30 and 40°C, and relative humilities of 50, 60, 70, 80 and 90%RH were used to obtain sorption coefficient and equilibrium moisture content data. Air velocity was kept constant at 32.4m/min for all the measurements. Equilibrium moisture content of polished rice was fitted with the Chen-Clayton's equation by using a special method of solution for the non-linear least squares method. The results revealed that the equilibrium moisture content depends on initial moisture content, and this can be supposed as an effect of hysteresis.

Journal

  • JOURNAL of the JAPANESE SOCIETY of AGRICULTURAL MACHINERY

    JOURNAL of the JAPANESE SOCIETY of AGRICULTURAL MACHINERY 57(6), 45-52, 1995-11-01

    The Japanese Society of Agricultural Machinery and Food Engineers

References:  9

Cited by:  3

Codes

  • NII Article ID (NAID)
    10019115729
  • NII NACSIS-CAT ID (NCID)
    AN00200470
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    02852543
  • NDL Article ID
    3643830
  • 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
    CJP  CJPref  NDL  J-STAGE 
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