| 摘要: |
| 为优化立式敞开式冷藏陈列柜风幕性能,本文通过在陈列柜搁架前端加装翼型结构,并对加装翼型结构前后的冷藏陈列柜进行性能测试,研究翼型结构对立式敞开式冷藏陈列柜性能的影响。测试结果表明;在测试室内环境温度为25 ℃,相对湿度为60%的条件下,加装翼型结构后,制冷系统的蒸发温度由-6.3 ℃上升至-4.5 ℃。送、回风平均温度波动范围由0.6~4.4℃,10.3~12.0℃变化至1.8~3.0 C℃,6.0~7.4℃,送风速度基本相同,回风速度降低了10.2%~l6.9%。陈列柜热卷吸系数下降了46%~48%。柜内不同层食品最大平均温差降低31%,内侧与外侧食品最大平均温差下降46.2% ;陈列柜总排热量由82.33kW·h/24 h降至66.49kW·h/24 h。总制冷耗电量由41.47 kW·/24 h降至32.24kW·h/24 h。系统总能耗由42.9I kW·h/24 h降至33.6l kW.h /24 h,说明在搁架前端加装翼型结构可使敞开式陈列柜的制冷系统性能、风幕性能、柜内温度均匀性和能量利用率均得到提升。 |
| 关键词: 冷藏陈列柜 翼型结构 风幕 食品温度 制冷系统 能耗 |
| DOI： |
| 投稿时间：2020-07-14 修订日期：2020-09-28
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| 基金项目:国家自然科学基金(51476148)资助项目。 |
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| Influence of Airfoil Structure on Performance ofVertical Open Refrigerated Display Cabinet |
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Yuan Pei1,2, Zeng Qinghui1, Lei Zhenglin1, Wu Yixiao1, Ｌü Yanli1, Zhang Enhua3, Hu Chaolong3, Zhou Kai3
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| (1.Zhengzhou University of light Industry;2.Xi'an Jiaotong University;3.Shandong Xiaoya Cold Chain Co.,Ltd.) |
| Abstract: |
| In this study, an airfoil structure was added in front of the display cabinet shelf to optimize the performance of a vertical open-type refrigerated display cabinet. The influence of the airfoil structure on the performance of a vertical open refrigerated display cabinet was studied by testing the performance of the refrigerated display cabinet after addition of the airfoil structure. The test results show that under an ambient temperature of 25 ℃and relative humidity of 60 %, the evaporation temperature of the refrigeration system increased from ?6.3 ℃ to ?4.5 ℃ after installation of the airfoil structure. The average temperature fluctuation of supply and return air varied from 0.6?4.4 ℃, 10.3?12.0 ℃ to 1.8?3.0 ℃ and 6.0?7.4 ℃. The supply air velocity was essentially the same, and the return air velocity decreased by 10.2%–16.9%. The thermal permeability coefficient in the display cases decreased by 46%–48%. The maximum average temperature difference of food in different layers of the cabinet decreased by 31%, and the maximum average temperature difference of food inside and outside decreased by 46.2%. The total heat emission of the showcase decreased from 82.33 kW?h/24 h to 66.49 kW?h/24 h. The total energy consumption of the system decreased from 42.91 kW?h/24 h to 33.61 kW?h/24 h. The results show that the refrigerating system performance, air curtain performance, temperature uniformity, and energy utilization ratio of the open display cabinet can be improved by adding an airfoil structure at the front end of the shelf. |
| Key words: refrigerated display case airfoil structure air curtain food temperature refrigeration system energy consumption |
