| 摘要: |
| 食品冷链设备中的风幕式陈列柜能耗大,尤其是双温型风幕陈列柜可满足冷、热双温储存的需求,其独立的制冷、制热设备具有更高的能耗。采用冷凝热回收技术可以有效降低双温型风幕陈列柜用于制热的能耗,进而降低总耗电量。本文对可回收冷凝热的冷热双温型风幕陈列柜进行了仿真分析，以COP和有效制热功率为指标，确定了制冷系统中各部件的优化方向，给出了具体的模型，将并将其与传统电加热型陈列柜进行了对比，然后结合具体的实验数据验证了模型的有效性，对其节能潜力进行了研究，结果发现:冷凝热回收的双温陈列柜具有显著的节能优势，其系统配置的核心是冷凝侧的风量，推荐配置变频风机，可在15、20、25、32 ℃的环境温度下分别采用0.018、0.03、0.045、0.095 m3/s 的最优风量；当冷凝器风量保持0.06 m3/s 时，冷凝热回收型双温陈列柜在高温工况有较好的节能效果，而在标准工况25 ℃环温时节能的效果最好，可以使耗电量下降约52％。 |
| 关键词: 风幕陈列柜 冷凝热回收 稳态仿真 风量 |
| DOI： |
| 投稿时间：2020-03-26 修订日期：2020-06-20
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| 基金项目: |
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| Simulation Study of a Dual-temperature Display Cabinet with Condensing Heat Recovery |
| Wang Qianlong,Wang Yao,Qian Suxin,Xu Jiabo,Li Lingyun,Dou Xiaoning,Yan Gang,Yu Jianlin |
| (Department of Refrigeration and Cryogenic Engineering, Xi' an Jiaotong University;Shandong New Beiyang Information Technology Co.,Ltd.) |
| Abstract: |
| Among all cold chain equipment, the energy consumption of an open refrigerated display case is usually high, especially the dual-temperature display cabinet, which provides simultaneous heating and cooling and consumes even more electricity. The condensing heat can be used for heating and therefore will lead to significant energy savings for the dual-temperature display cabinet. This paper simulates a dual-temperature display cabinet with condensing heat recovery. Employing COP and effective heating power as the indices, the optimization direction of each component in the refrigeration system is determined, and its performance is compared with the baseline cabinet with an electric heater. The simulation results of the baseline cabinet are validated by experimental results, and the energy-saving potential of the new system is studied. Simulation results suggest that the dual-temperature display cabinet with condensation heat recovery has significant energy-saving advantages. The key is the air volumetric flowrate of the condenser. It is recommended to install a variable-speed fan, which can produce optimal air volumes of 0.018 m3/s, 0.03 m3/s, 0.045 m3/s, and 0.095 m3/s at ambient temperatures of 15 ℃, 20 ℃, 25 ℃, and 32 °C, respectively. When the condenser air flow rate is kept at 0.06 m3/s, the cabinet has a decent energy-saving potential when the ambient temperature is high. The best energy savings is achieved when the ambient temperature is 25 ℃, with a reduction in power consumption of 52%. |
| Key words: open display cabinet condensing heat recovery steady state simulation air flowrate |
