保温材料对保温箱内温度场的影响

Study on temperature field of different materials in incubator

通过构建保温箱基本模型,运用有限元法及Fluent进行热流耦合分析,得到保温箱内温度场,并通过实验进行验证。选取3种常见保温材料[挤塑聚苯乙烯(XPS)、发泡聚氨酯(EPU)与真空隔热板(VIP)],通过模拟仿真研究不同材质保温箱内温度场分布规律。结果表明:保温箱使用的保温材料不同,内部温度场有较大的差异性,其中VIP保温箱内温度最接近蓄冷剂相变温度值,且温度场分布最均匀; 3种材料都具有较好的阻热性能,其中VIP的阻热性能最好,在保温箱内相同位置的温度比EPU和XPS要低。

The temperature fields of the incubators were investigated based on the fundamental model of incubator,using finite element method by applying finite elements. Moreover,the Thermal-Fluid Couple by Fluent was analyzed,and the temperature field was validated by experiment.Three common thermal insulation material including XPS,EPU and VIP were selected,and the temperature fields distribution of different materials were studied by the computer simulation. The results showed when using the different insulation materials,the internal temperature field were different,and the internal temperature of VIP incubator were closest to the phase change temperature of cool storage agent and with the temperature distribution uniformity best. The three materials showed excellent thermal barrier properties,and among them VIP had the best thermal barrier performance with lowest temperature comparing to EPU and XPS.