论文标题

开发用于在氮冷冻剂上生产热屏蔽结构的技术,不包括通过气体传热

Development of a technology for manufacturing a heat-shielding structure on nitrogen cryocontainers, excluding heat transfer through gas

论文作者

Zhun, H. H., Starikov, V. V., Koverya, V. P.

论文摘要

创建科学和技术基础的一项重要阶段之一是通过筛查效率最低的热能热保护(SVTI)的最低热能热保护(SVTI)的发展是在SVTI层中实现最佳真空的过程的开发,因为在这种压力上,由于这种压力,由于SVTI层中的最佳真空,因此仅通过SVTI和svti的组合来构成。提议通过使用中的缓冲材料在370-380 k的单独真空室中脱气12小时,以使其在热绝缘层获得这种压力,以使其从结构中去除水分子,然后用干氮分子代替它们。这些分子的吸附热少了3-4倍。因此,它们被抽出更快。结果,可以加速(到20小时)以实现热绝缘的最佳真空,以及降低有效导热率的11%。进行的分析(根据开发的方法)表明,在辐射导热率的33%和67%的接触导电组件中确定了在冷冻机构中实现的最佳有效导热率。

One of the important stages in the creation of the scientific and technical foundations for the calculation, design and manufacturing technology of the lowest heat-conductivity thermal protection from screen-vacuum thermal insulation (SVTI) is the development of a process for achieving the optimal vacuum in the SVTI layers, since at this pressure, thermal conductivity through the SVTI is carried out only due to the radiant and contact-conductive components. It is proposed to obtain such a pressure in thermal insulation by using cushioning material in it, which was previously degassed in a separate vacuum chamber at 370-380 K for 12 hours in order to remove water molecules from its structure and then replace them with dry nitrogen molecules. These molecules have 3-4 times less heat of adsorption; therefore they are pumped out faster. As a result, it becomes possible to accelerate (by 20 hours) to achieve optimal vacuum in thermal insulation, as well as 11% lower effective thermal conductivity. The analysis carried out (according to the developed methodology) showed that the achieved optimal effective thermal conductivity of thermal insulation in a cryocontainers is determined by 33% of radiant thermal conductivity and 67% of the contact-conductive component.

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