著者

村田 敏

出版者

九州大学

雑誌

九州大學農學部學藝雜誌 (ISSN:03686264)

巻号頁・発行日

vol.27, no.3, pp.247-257, 1973

被引用文献数

1

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1) The transient heat transfer in precooling system with ice bunker and packed bed of fruits and vegetables is expressed Schumann's equations of heat transfer in packed bed with a particular boundary condition. The boundary condition is given as a constant ratio of the inlet gas temperature to the outlet gas temperature. The condition differs from Schumann's and Furnas', and is derived from the cooling characteristics of the column of crushed ice. The solution of this problem is expressed by a series in terms of coefficient of the exponent of the ratio with the integral which has the same form of Schumann's solution of integral. The series is rapidly convergent, so that the solution is easily computed using Schumann-Furnas chart. 2) The equation of steady state heat transfer of packed bed of rough rice is derived from Schumann's equation by adding heat generation term of respiration and removing time dependent term. The analytical solution is given and the numerical chart of the solution is made by measuring the heat transfer coefficient of the rough rice. 3) For calculating the cooling characteristics of rough rice in vertical duct, the equation of transient heat transfer is derived by the Schumann's assumption. The solution is given and transformed to the Furnas' solution by introducing two new variables.粒子堆積層の非定常伝熱に関する基礎方程式であるSchumannの方程式を,まず氷餅(アイスバンカ)と農産物堆積層をつなぐ循環冷却系の境界値問題として解き,氷槽による堆積農産物の冷却計算法を示した.次に基礎方程式を呼吸熱の発生する場合に拡張し,定常問題として穀物堆積層の呼吸熱除去のための送風温度,送風量決定計算法を導いた.最後に基礎方程式を極座標系で表示し,穀物の乾燥・冷却・貯蔵庫として一般に用いられているVertical ductにおける冷却計算法を示した.なおこれらの具体的計算に必要なデータを実験や文献により整理し計算図表を作製した.