真空绝热板覆盖率对冷藏厢体内部温度场特性的影响  

Effect of coverage percentage of vacuum insulation panels on inner temperature distribution of refrigerated container

作　　者：李君[1,2] 栗栋[1,2] 王海林[1,2] 刘杰坤 陆华忠[1,2] 

机构地区：[1]华南农业大学南方农业机械与装备关键技术教育部重点实验室,广东广州510642 [2]华南农业大学工程学院,广东广州510642

出　　处：《食品与机械》2016年第7期99-102,165,共5页Food and Machinery

基　　金：国家科技支撑计划课题(编号:2013BAD19B01-1-2);现代农业产业技术体系建设专项资金(编号:CARS-33-13)

摘　　要：采用嵌套真空绝热板结构制作隔热壁板的冷藏厢体具有绝热性能优越、热导率低和节能效果明显的特点。考虑到嵌入不同覆盖率嵌套的真空绝热板,对冷藏厢体内部温度场特性的影响,利用计算流体力学方法,对试验冷藏厢体内部的温度场进行数值模拟,分析了VIPs不同覆盖率厢体保温效果和内部温度场均匀性的变化规律,并进行了试验验证。结果表明:冷藏厢体壁板嵌入真空隔热材料可以提高厢体绝热保温效果,改善内部温度场的均匀性。在相同制冷量的情况下,随VIPs覆盖率的增加,厢内平均温差最高下降40%,厢内平均温降可增加43%。当覆盖率增加到大于66%时,厢体内温度场的均匀性趋于稳定。The thermal insulation panels of refrigerated container using embedded vacuum insulation panels are high performance thermal insulations with low heat conductivity and promising energy savings. Considering the effect of coverage percentage of vacuum insulation panels（ VIPs） on inner temperature distribution of refrigerated container,a model based on computational fluid dynamics（ CFD） was used to numerically simulate the inner temperature distribution of a test refrigerated container. The effect of coverage percentage of VIPs on the insulation performance and temperature distribution uniformity was analyzed numerically and experimentally.The results illustrated that the insulation panels using VIPs can improve the insulation performance of refrigerated container and modify the inner uniformity of temperature distribution temperature. With the same refrigerating output,the maximum difference of inner temperature was reduced40% as the coverage percentage of VIPs increased from 0 to 87%,and the average inner temperature drop of refrigerated container can be reduced 43%. When the coverage rate is greater than 66%,the internal temperature field tends to be stable.

关 键 词：冷藏厢体 计算流体力学 真空绝热板 温度场 

分 类 号：TS203[轻工技术与工程—食品科学]