【摘要】 为提高果蔬冷藏运输物流经济性，保障果蔬品质，结合真空绝热保温技术，设计了多温区蓄冷式冷藏车箱，利用试验制备的两种相变材料，相变温度分别为2.34,-15.6℃，相变潜热分别为231.7,276.1 J/g，导热系数分别为0.324,0.914 W/（m·K），无过冷，相变平台稳定。对蓄冷板在不同条件下的释冷过程及特点以及冷藏箱内空载和载货时温度分布进行了研究。结果表明，由于中间保温板热传递，空载时温区一维持安全温度区间时间超出理论计算时间，而温区二小于设计时间；载货时货物的呼吸热对多温区一维持安全温度时间相差82 min，对温区二温度分布影响较小，为提高蓄冷式冷藏车箱模拟的精度，内热源不容忽略。研究结果可为冷链物流用蓄冷式冷藏车箱的进一步设计和优化提供支持，以及蓄冷技术在果蔬冷链物流中的应用提供参考。更多还原

【Abstract】 In order to improve the economy of logistics to ensure the quality of fruits and vegetables during transportation,a cold storage type multi-temperature zone refrigerated truck was designed in combination with the vacuum insulation technology.Two phase change materials were prepared by experiments,whose phase change temperatures were 2.34 and-15.6 ℃,latent heat was 231.7 and 276.1 J/g,and thermal conductivity was 0.324 and 0.914 W/（m·K）,respectively.They also showed no subcooling and had stable phase change platform. The melting process and characteristics of the cold plates under different conditions and temperature distribution of the refrigerated compartment under no load and load were studied. The simulation results show that due to the heat transfer of the intermediate insulation board,time of temperature zone I being maintained in safe temperature interval exceeds the theoretical time,whereas the time of temperature zone II is less than the theoretical time. When the cargo is loaded,the heat of respiration coming from fresh fruits and vegetables has a time difference of 82 minutes in maintaining the safe temperature of TI,but it has less influence on the temperature distribution of TII.Therefore,in order to improve the simulation accuracy of refrigerated compartments,the inner heat sources should not be neglected. Results of this research provide support for the better future design and optimization of cold storage type multi-temperature-zone refrigerated truck,and provide a reference for the application of cold storage technology in the cold chain logistics of fruits and vegetables.更多还原