Controlled-porosity trapping plugs for space cryogen system phas

Details Controlled-porosity trapping plugs for space cryogen system phas Controlled-porosity trapping plugs for space cryogen system phas

1990-05-29

1996-10-08

Nelson, Peter A.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428613, 75247, 75248, H01F 302

Patent

active

055640672

ABSTRACT:
A trapping plug with unique characteristics provides phase separators for cryogenic storage systems for space applications. The plug has a body of high-thermal conductivity metal such as OFHC copper and a multiplicity of holes of uniform, extremely small diameter and uniformly spaced extending through the body. The hole diameters and their uniformity in size and spacing enable precise design of an operating system using disclosed criteria. Hole diameters at the range of interest for systems for long-term storage of cryogenics such as liquid hydrogen, that is, 0.1 to 5.0 microns, may be provided in the plugs. Multiple plugs or clusters of plugs disposed in a plate may be used as required. A storage system making use of the trapping plugs also includes external vent lines and a flow regulator that controls flow of vapor through the vent lines.

REFERENCES:
patent: 3751271 (1973-08-01), Kimura et al.
patent: 3938554 (1976-02-01), Samuels
patent: 3980445 (1976-09-01), Aleshin et al.
patent: 4070207 (1978-01-01), Holdeman
patent: 4223723 (1980-09-01), Hilal
patent: 4228662 (1980-10-01), Klipping
patent: 4277950 (1981-07-01), Eigenbrod et al.
patent: 4869944 (1989-09-01), Harada et al.

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