SELF-CONTAINED SYSTEM OF NITROGEN REFRIGERATION FOR THERMOSTATTING OF SPECIAL TRANSPORT FACILITIES

摘要

FIELD: cryogenic engineering and cryogenic refrigerating machines operating on the Stirling reverse cycle principle. SUBSTANCE: high-pressure nitrogen gas with cryogenic temperature is fed through a gas-intake device to an air-cooled panel positioned in a heat-insulated cooled volume and cools down the volume interior to the necessary temperature and gets heated itself. With the aim of precooling and pressure reduction nitrogen from the panel is fed to an expansion vessel through a throttling valve, from which it is sucked in the condenser of the Stirling cryogenic refrigerating machine, where it gets condensed changing in the liquid phase and overflows by gravity to the Dewer flask. From the flask liquid nitrogen is fed to a vessel with the aid of a high-pressure pump. The Stirling cryogenic machine is driven by the engine of the transport facility. Refrigerating liquid from the refrigerator heated from the machine working medium is fed to a heat exchanger for cooling by the environment and to a coil, where it is cooled down to a low temperature due to heat exchange with liquid nitrogen. EFFECT: thermostatting of inhabited rooms without disturbance of air composition at a high level of explosion- and fireproofness. 1 dwg