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通过对一典型多层隔热材料在真空环境下的系列隔热性能实验和分析,分析了多层隔热材料层间温度差(Δt)的分布趋势,揭示了多层隔热材料在不同层间隔热性能的优劣特性及其变化规律。实验结果证明:多层隔热材料的层间温度差(Δt)变化呈U型分布趋势;外层隔热性能优于中间层的隔热性能,4层以内18层以外层间气流状态接近分子流,隔热性能较好,温度差(Δt)大;中间各层气流处于非稳态,隔热性能稍差,温度差(Δt)小;靠近加热板一侧层间温度差小于低温一侧。
Through the experiment and analysis of a series of thermal insulation performance of a typical multi-layer insulation material in vacuum environment, the distribution trend of temperature difference (Δt) between multi-layer insulation materials is analyzed. It is revealed that the thermal insulation materials in different layers Advantages and Disadvantages of Interval Thermal Performance and Their Variation. The experimental results show that the temperature difference between layers (Δt) of multi-layer insulation material shows a U-shaped distribution trend; the thermal insulation performance of the outer layer is better than the thermal insulation performance of the middle layer; Flow, good thermal insulation performance, the temperature difference (Δt) is large; the middle layer of the airflow in a non-steady state, slightly worse insulation properties, the temperature difference (Δt) is small; near the heating plate side layer temperature difference is less than the low temperature side .