立式冷藏陈列柜内食品传热模型研究及温度预测
Temperature prediction and heat transfer model study of food product in vertical open refrigerated display cabinet
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摘要: 考虑立式冷藏陈列柜热量传递的导热、对流和辐射3种方式,将柜内食品分为4个区域,对简化为二维形式的立式冷藏陈列柜传热模型进行了分析与修正,并应用此模型对柜内食品温度进行预测.结果显示:不同位置食品温度与试验值基本吻合,柜内下前和上后食品温度值和试验值偏差比较大;与后侧食品相比,前侧食品温度随着环境温度升高幅度更大,与实际情况相符.Abstract: Heat transfer by conduction,convection and radiation was taken into account in an open vertical display cabinet.The load positions were divided into four regions for a heat transfer model.The heat transfer model simplified as a two-dimensional problem was analyzed and modified.Then it was used to predict the load temperature in an open vertical display cabinet.The result showed that predicted values basically fitted with the experiment results.The deviation of bottom/front and top/rear load temperature between model and experiment was larger.The front load temperature changed more than the rear with the ambient temperature increase.And the result was coincided with the fact.
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