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A Low Cost, Self Acting, Liquid Hydrogen Boil-Off Recovery System (en Inglés)
Nasa Technical Reports Server (Ntrs)
(Autor)
·
Joy W. Pelfrey
(Autor)
·
Bibliogov
· Tapa Blanda
A Low Cost, Self Acting, Liquid Hydrogen Boil-Off Recovery System (en Inglés) - Pelfrey, Joy W. ; Nasa Technical Reports Server (Ntrs)
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Reseña del libro "A Low Cost, Self Acting, Liquid Hydrogen Boil-Off Recovery System (en Inglés)"
The purpose of this research was to develop a prototype liquid hydrogen boll-off recovery system. Perform analyses to finalize recovery system cycle, design detail components, fabricate hardware, and conduct sub-component, component, and system level tests leading to the delivery of a prototype system. The design point and off-design analyses identified cycle improvements to increase the robustness of the system by adding a by-pass heat exchanger. Based on the design, analysis, and testing conducted, the recovery system will liquefy 31% of the gaseous boil off from a liquid hydrogen storage tank. All components, including a high speed, miniature turbocompressor, were designed and manufacturing drawings were created. All hardware was fabricated and tests were conducted in air, helium, and hydrogen. Testing validated the design, except for the turbocompressor. A rotor-to-stator clearance issue was discovered as a result of a concentricity tolerance stack-up.
