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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/23935

Title: 長方體物品冷凍速率之提升研究
A Study of Enhancement of Frozen Rate
Authors: 陳正中;廖世平;葉榮華
Contributors: NTOU:Department of Mechanical and Mechatronic Engineering
國立臺灣海洋大學:機械與機電工程學系
Keywords: 冷凍物;鋁條
I-DEAS
Date: 2005
Issue Date: 2011-10-20T08:08:49Z
Publisher: 2005年能源與冷凍空調學術研討會/台北科技大學
Abstract: 本文主要研究長方形容器內置鯖魚置放於冷凍室之凍結速率。主要參數包括冷凍物品與地面之間距實驗量測,以及在容器內部鯖魚間埋入熱傳導性良好之鋁條,來提升冷凍物品之結凍效率。在數值求解方面,使用套裝軟體「I-DEAS」來模擬冷凍室之三維速度與溫度場的分佈情形。
由結果顯示與實驗量測值相符,驗證其正確性。其次在冷凍物品中央部份埋入鋁條,不管縱向或橫向,垂直或水平面均明顯提升,使得冷凍物品中央局部高溫區域熱量得以藉鋁條散出,達到均勻降溫之效果;在埋入兩支鋁條之案例中,不論是縱向或橫向,均以垂直擺置較佳,其兩者又以縱向較好;其次埋入四支鋁條之案例中,分別以水平、垂直各兩支擺置,發現以縱向的擺置較佳。
In this paper, the frozen rate of a rectangle container full of mackerel fish in a freezer is studied. The gap between the container and ground of freezer was varied to measure the flow and thermal fields. In addition, aluminum bars are placed into the middle portion of the container to increase the frozen rate. Both experimental and theoretical works have been conducted. A software I-DEAS is applied to simulate the air circulation in the freezer.
It is found that the calculations agree well with the data from experiments in the cases by varying thickness of the gap, which results in increasing the frozen rate. As for embedded aluminum bars inside the contained which is favorable in frozen effect in all the directions of allocation. The local hot region is effectively reduced through the highly conductive metal added. It is concluded that the performance of enhancement is more pronounced, when the axial direction of bars is in the longitudinal direction.
Relation: pp.2-2-1~2-2-7
URI: http://ntour.ntou.edu.tw/handle/987654321/23935
Appears in Collections:[機械與機電工程學系] 演講及研討會

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