CRYOSTAT WITH PHASE-TRANSFER ISOCHORIC THERMAL INSULATION Russian patent published in 2022 - IPC F17C3/08 

FIELD: cryogenic engineering.

SUBSTANCE: invention relates to cryogenic engineering, namely to cryostats for long-term storage of liquefied gases at normal pressure, in particular for storage of liquid hydrogen fuel on board aircraft. A cryostat with phase-transition thermal insulation contains external and internal vessels inserted with a gap one into the other so that the space between them creates a sealed heat-insulating jacket containing screen-vacuum thermal insulation. The heat-insulating jacket is filled with a working fluid placed at normal temperature and pressure and having a condensation and crystallization temperature higher than the temperature of the cryogenic liquid stored in the inner vessel. In a sealed heat-insulating jacket on the outer walls of the inner vessel, there are semi-closed condensation pockets, limited by shelves with sides, on which, when the inner vessel cools down, the working fluid placed in the jacket condenses and then crystallizes.

EFFECT: improving thermal insulation properties, increasing the safety of storage of explosive or toxic cryogenic liquids, increasing the strength of the inner vessel.

7 cl, 4 dwg