Efficient pressure-control cryogenic propellant storage tank with ejector

Abstract

The invention discloses an efficient pressure-control low-temperature storage tank with an ejector. The efficient pressure-control low-temperature storage tank comprises a low-temperature storage tankbody, a low-temperature circulating pump, a liquid throttling valve, the ejector, a gas throttling valve, a sleeve-type heat exchanger, an exhaust cooling coiled tube, an exhaust valve pipelines andthe like. In order to strengthen heat exchange, the counter-flow-type sleeve heat changer is adopted in the efficient pressure-control low-temperature storage tank. After heat exchange, small parts offluids in a throttling loop absorb heat to become saturated or overheat gas, and the saturated or overheat gas is divided into two paths after being discharged out of the tank body; and one path of the saturated or overheat gas is throttled by the gas throttling valve to be depressurized and cooled, the other path of the saturated or overheat gas directly enters the ejector, the low-temperature and low-pressure gas is ejected by the high-pressure gas entering the ejector, and the high-pressure gas and the low-temperature and low-pressure gas enter the cooling coiled tube after being mixed. Byadopting the ejector, power devices such as a sucking pump and an exhaust pump are omitted, and the ejector is not provided with a motion part, and thus the service life can be prolonged greatly. Theejected and mixed gas forms a layer of cold shield in the cooling coiled tube, so that external heat leakage is reduced. According to the efficient-pressure-control low-temperature storage tank, leaked heat of the tank body is transferred while the exhaust cooling capacity is fully utilized, and the pressure of the tank body is controlled.

Description

technical field [0001] The invention relates to a low-temperature propellant storage device, in particular to a high-efficiency pressure-controlled low-temperature propellant storage tank with an ejection device, belonging to the field of low-temperature propellant storage and fluid management. Background technique [0002] Cryogenic propellants have excellent properties such as high specific impulse, environmental friendliness, and easy availability, and have been increasingly used in the aerospace field. However, due to the low storage temperature of the cryogenic propellant, external heat leakage can easily cause the temperature of the fluid to rise and evaporate, which will lead to an increase in the pressure of the storage tank. In order to ensure safe operation in orbit, the pressure of the cryogenic propellant storage tank must be controlled within a certain range. If the pressure of the tank is too high, it will cause the overpressure explosion of the storage tank a...

AI Technical Summary

Problems solved by technology

[0005] The existing thermodynamic exhaust system consists of cryogenic storage tanks, circulation pumps, concentric casing heat exchangers, throttle valves, exhaust valves and other pipeline facilities. caused a lot of cold energy loss

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