填充相变材料的复合搁架的传热与蓄冷特性  

The Heat Transfer and Cool Storage Characteristic of Composite Shelf Filled with Phase Change Materials

作　　者：吴学红[1] 李伟平[1] 王立勋[1] 赵鑫利[1] 吕彦力[1] 龚毅[1] 

机构地区：[1]郑州轻工业学院能源与动力工程学院,郑州450002

出　　处：《制冷学报》2015年第4期23-28,共6页Journal of Refrigeration

基　　金：国家自然科学基金(51476148)资助项目;郑州领军人才项目(131PLJRC640)资助~~

摘　　要：为改善冷藏陈列柜性能,降低柜内食品温度,抑制融霜期间食品温度的回升,利用热管的高导热性和相变材料的蓄冷特性,将冷藏陈列柜的搁架设计成由热管和相变材料构成的复合式搁架。通过实验研究填充三种相变材料（RT3、RT4、RT5）的搁架的传热和蓄冷特性以及对冷藏陈列柜中食品包温度的影响。实验结果显示：相比未改进的搁架,填充RT3的复合搁架上食品包温度降低13.7%~80.0%,温升减小53.3%~70.0%;填充RT4的复合搁架上食品包温度降低20.0%~83.3%,温升减小83.3%~87.5%;填充RT5的复合搁架上食品包温度回升减小66.7%~75.0%。三种复合搁架相比较,填充RT4的复合搁架上各层、各排食品包平均温度最低,均在5℃以内,因此RT4相变材料蓄冷效果最好。In order to improve the performance of refrigerated display cabinet, decrease the food temperature and restrain the temperature fluctuation during defrosting, a kind of composite shelf is proposed in the food refrigerated display cabinet （RDC） based on the high-ther- mal conductivity of heat pipe and cool storage of phase change materials. The influence of three phase change materials of RT3, RT4, RT5 on the temperature of food packages, the characteristic of heat transfer and cool storage of composite shelf were investigated. Com- pared with the ordinary shelf, the food temperature on composite shelf of RT3 reduces by 13.7% - 80.0%, temperature fluctuation de- creases 53.3% - 70.0% ; the food temperature on composite shelf of RT4 reduces by 20.0% - 83.3%, temperature fluctuation decreases 83.3% -87.5% ; the food temperature fluctuation on composite shelf of RT5 decreases 66.7% -75.0%. Compared with the other two composite shelves, the average food temperature of each floor and each row on composite shelf of RT4 is the lowest and within 5 ~C, thus the cool storage performance of phase change material of RT4 is the best.

关 键 词：蓄冷 相变材料 食品温度 热管 冷藏陈列柜 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TB383[动力工程及工程热物理—热能工程]