Abstract This study presents the experimental investigations on heat transfer and airflow in a closed refrigerated display cabinet. Air and product temperatures and air velocity were measured with thermocouples and a hot-wire anemometer, respectively. Temperature variation in the cabinet depends on the positions. The front areas contributed to higher temperature, whereas the rear areas were at a lower temperature. Benefits of doors were also examined by comparing the results of air and product temperatures with the case without doors. The cabinet with doors provided less temperature heterogeneity ( Δ T max = 2.1 °C) compared to the case without door ( Δ T max = 4.9 °C). The maximum air velocity in the air curtain of 0.6 m s−1 was observed at the discharge grille. The horizontal air velocity from the perforated plate was low (

中文翻译：

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封闭式冷藏展示柜内传热与气流的实验分析

摘要 本研究介绍了封闭式冷藏展示柜中传热和气流的实验研究。空气和产品温度以及空气速度分别用热电偶和热线风速计测量。机柜内的温度变化取决于位置。前部区域的温度较高，而后部区域的温度较低。还通过比较空气和产品温度与无门情况下的结果来检验门的优势。与没有门的情况 (Δ T max = 4.9 °C) 相比，有门的机柜提供的温度不均匀性更小 (Δ T max = 2.1 °C)。在排气格栅处观察到风幕中的最大风速为 0.6 m s-1。来自穿孔板的水平气流速度低（