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

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