Temperature failure at the end of cold-chain transportation is common.Based on phase-change technology,a cold energy storage box suited for the end of cold-chain transport below-18 ℃ was developed.The temperature field characteristics and cold-storage performance of the cold-storage box under the influence of the environmental temperature,the thickness of the vacuum insulated panel(VIP),relative positions of the phase-change material(PCM)and VIP,type of PCM,and other parameters were examined.The study revealed that the cold-storage box had strong immunity to variations in the ambient temperature,and the maximum effective cold preservation time can be extended to 29.26 h when assembling the vacuum insulated panels.When the VIPs were placed on the outer layer of the corresponding PCM panels,the effective cold preservation period increased by 54.3％.Four types of organic PCMs with different phase-change temperatures were examined for use in cold-storage boxes.It was determined that 2-octanone with a phase transition temperature of-21.55 ℃ had the optimal performance in terms of cold preservation time,uniformity coefficient,and power consumption.The bottom plate had the greatest impact on the overall cold-storage capacity as evidenced by its 0.454 individual plate factor.
关键词
冷藏单元/蓄冷/相变材料/性能系数
Key words
cold storage unit/cold thermal energy storage/phase-change material/coefficient of performance
维普
万方数据