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Выявление и устранение дефектов в криососудах

Выявление и устранение дефектов в криососудах

Abstract

В работе приведены результаты исследований двух- и трехмерных процессов тепломассопереноса в теплозащите криососудов из полос экранно-вакуумной теплоизоляции (ЭВТИ). Установлено, что причинами увеличения ее теплопроводности на криососудах в сравнении с их калориметрическими образцами является образование в них различных дефектов. Определены значения для установленного комплекса из 11 параметров, улучшающих конструкции и технологии для проектирования и изготовления криососудов с теплозащитой из пакетов ЭВТИ без дефектов, теплопроводность которых лишь на 24-27 % превышает калориметрические значения. Изготовленные криососуды с данной теплозащитой имеют ресурс работы при разовом заполнении, превышающий лучшие зарубежные аналоги. The paper reports results of studies of 2D- and 3D-processes of heat and mass transfer in cryovessels heat shielding consisting of bands of thermal superinsulation. It was established that the increase of its thermal conductance in cryovessels compared to their calorimetric samples is caused by various damages. The values for established set of 11 parameters were determined which optimized construction and technology of designing and manufacturing cryovessels with enhanced, damage-free, superinsulation heat shielding whose thermal conductivity was only by 24-27 per cent over the calorimetric values. The cryovessels made using such heat shielding have operation time per one filling with liquid nitrogen that exceeds best worldwide known prototypes.

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Keywords

теплопроводность, теплозащита, калориметр, calorimeter, криососуд, экранно-вакуумная теплоизоляция, heat conductance, thermal superinsulation, cryovessel, тепломассоперенос, heat shielding, heat and mass transfer

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green