Deep supercooled liquid oxygen preparation system and preparation method

Abstract

The invention provides a deep supercooled liquid oxygen preparation system and preparation method, and solves the technical problem that deep supercooled liquid oxygen cannot be effectively prepared in the prior art. The system comprises a liquid oxygen container, a liquid nitrogen container, a liquid oxygen subcooler and an ejection evacuation pressure reduction system. The liquid oxygen container is used for storing supercooled liquid oxygen and converted deep supercooled liquid oxygen. The liquid nitrogen container is used for storing standard boiling point liquid nitrogen. The liquid oxygen subcooler is used for forming a shell pass and a tube pass of a heat exchanger and carrying out subcooling on the liquid oxygen in the tube pass by utilizing a heat exchange refrigerant medium in the shell pass. The ejection evacuation pressure reduction system is used for obtaining heat exchange refrigerant medium steam through an ejector to form a pressure reduction and temperature reduction process. A main circulation loop is formed between the liquid oxygen container and the liquid oxygen subcooler, the liquid nitrogen container and the liquid oxygen subcooler form a refrigerant medium balance pipeline, and the shell pass of the liquid oxygen subcooler is connected with an ejector leading-in connector of the ejection evacuation pressure reduction system through a communicating branch. The deep supercooled liquid oxygen is successfully prepared, and the overall requirement is met. The deep supercooled liquid oxygen preparation system and preparation method can be directly appliedto liquid oxygen filling of a low-temperature carrier rocket, and the technical risk of subsequent development tasks is reduced.

Description

technical field [0001] The invention relates to the technical field of liquefaction refrigeration, in particular to a deep subcooled liquid oxygen preparation system and a preparation method. Background technique [0002] In the prior art, liquid oxygen cryogenic propellant is one of the main fuels for cryogenic launch vehicles. At present, the injection of liquid oxygen cryogenic propellant is mainly in the saturated state at atmospheric pressure, supplemented by the supercooled state, and the liquid oxygen injection in the supercooled state is only used for the supplementary stage. The cryogenic propellant is filled with supercooled liquid oxygen throughout the process, which can effectively improve the thermodynamic properties of the liquid oxygen cryogenic propellant. According to the physical parameters of liquid oxygen, it can be known that after the cryogenic propellant is cooled, the density of the propellant can be increased and the vaporization pressure can be red...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the embodiments of the present invention provide a deep supercooled liquid oxygen preparation system and preparation method to solve the technical problem that the existing technology cannot effectively prepare deep supercooled liquid oxygen

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