摘要
本文研制了一种适用于冷冻产品储存、运输的高效低温无机盐相变蓄冷材料,相变温度为-18℃。相变材料由氯化铵、氯化钾和水混合而成,质量分数分别为16%、9%和75%。通过冰点公式理论估算该质量分数配比相变材料的相变温度为-20℃,与步冷曲线的平台温度无显著性差异。同时将相变材料进行冻融实验,升降温过程的相变温度均符合测试温度,且升温平台更加平稳,满足实际储存要求。当环境温度为30℃,保温箱内部温度在-25~-15℃时,持续时间可达3.66 d,完全满足国内冷链物流的运输时间。
A high-efficiency low-temperature inorganic salt phase change cold storage material suitable for the storage and transportation of frozen products is developed in this paper,and the phase change temperature is-18°C.Phase change materials are made by blending NH4Cl,KCl and water,with mass fraction of 16%,9%and 75%,respectively.The phase change material with this mass fraction ratio is theoretically estimated by the freezing point formula,and phase change temperature is calculated to be-20°C,which has no significant difference from the platform temperature of the step cooling curve.At the same time,the phase change material is subjected to freeze-thaw test,and the phase change temperature in the heating and lowering process is in line with the test temperature,and the heating platform is more stable to meet the actual storage requirements.When the ambient temperature is 30°C,the insulated container maintains an internal temperature between-25°C and-15°C for up to 3.66 days,which fully meets the transportation time of domestic cold chain logistics.
作者
刘丽丽
LIU Lili(Shandong Special Inspection Standard Technology Co.,Ltd.,Tai'an 271021,Shandong,China)
出处
《制冷技术》
2025年第3期82-85,共4页
Chinese Journal of Refrigeration Technology
关键词
冷冻储存运输
相变温度
冻融实验
保冷时效
Frozen storage and transportation
Phase change temperature
Freeze-thaw test
Cold preservation time
