Liquid oxygen propellant full-supercooling filling system and method based on three-stage subsection cooling
A technology for segmented cooling and filling system, which is applied in the method of container discharge, piping system, container filling method, etc., can solve the problems of increasing the overall system cost, high price of helium, increasing system complexity, etc., and achieve system cost. The effect of increasing, excellent temperature difference uniformity, and improving structural complexity
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Embodiment 1
[0045] This embodiment provides a liquid oxygen propellant full subcooling filling system based on three-stage sub-cooling, which has high thermodynamic efficiency and low cost.
[0046] The liquid oxygen propellant full subcooling filling system includes two parts: a liquid oxygen subcooling unit and a liquid oxygen filling unit.
[0047] like figure 1 As shown, the liquid oxygen subcooling unit adopts a three-stage sub-cooling method, including: liquid nitrogen direct cooler 3, liquid nitrogen evacuation cooler 4, liquid oxygen evacuation cooler 5, subcooled liquid oxygen pump 7, liquid nitrogen evacuation pump 8. Liquid oxygen evacuation pump 9, liquid nitrogen source 10, liquid oxygen source 11, first cryogenic cut-off valve 12 and second cryogenic cut-off valve 13;
[0048] The liquid oxygen filling unit includes: a liquid oxygen tank 1 on the arrow, a ground liquid oxygen storage tank 2 , a filling liquid oxygen pump 6 , a third low temperature cut-off valve 14 and a th...
Embodiment 2
[0055] Based on the liquid oxygen propellant fully subcooled filling system in the above embodiment 1, this embodiment provides a filling method using the fully supercooled filling system:
[0056] Initially, all cryogenic shut-off valves are closed.
[0057] (1) Preparation of deep subcooled liquid oxygen and pre-cooling period of the box: the liquid nitrogen source 10 injects liquid nitrogen into the liquid nitrogen direct cooler 3 and the liquid nitrogen evacuation cooler 4; the liquid oxygen source 11 injects the liquid oxygen evacuation cooler 5 Inject liquid oxygen; the liquid nitrogen evacuation pump 8 is started, so that the temperature of the liquid nitrogen medium inside the liquid nitrogen evacuation cooler 4 approaches about 64K; the liquid oxygen evacuation pump 9 is started, so that the temperature of the liquid oxygen medium inside the liquid oxygen evacuation cooler 5 tends to About 55K;
[0058] Open the first cryogenic cut-off valve 12 and the third cryogeni...
Embodiment 3
[0062] On the basis of above-mentioned embodiment 2:
[0063] If the deep subcooled liquid oxygen preparation of the first stage and the pre-cooling period of the box are completed, the deep subcooled liquid oxygen filling period of the second stage cannot be directly carried out (for example, the rocket launch is delayed), due to the influence of heat leakage, the ground liquid Oxygen storage tank 2 will generate thermal stratification and liquid oxygen tank 1 on the arrow will heat up. It is necessary to take relevant measures for secondary subcooling and pre-cooling, so that the liquid oxygen inside the liquid oxygen storage tank 2 on the ground and the liquid oxygen tank 1 on the arrow Maintain a deep subcooled state (ie, subcooled maintenance). Specifically, the start-stop status of the liquid nitrogen direct cooler 3, the liquid nitrogen evacuation cooler 4, and the liquid oxygen evacuation cooler 5 can be determined according to the liquid oxygen temperature inside the ...
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