US 11,719,387 B2
Liquid conditioning for cryogen vessel fill station
Simon J. Shamoun, Acworth, GA (US); and Isaiah Edmonds, West Windsor, NJ (US)
Assigned to Messer Industries USA, Inc., New Castle, DE (US)
Filed by Messer Industries USA, Inc., Bridgewater, NJ (US)
Filed on Dec. 5, 2018, as Appl. No. 16/210,239.
Prior Publication US 2020/0182407 A1, Jun. 11, 2020
Int. Cl. F17C 7/02 (2006.01); F17C 7/00 (2006.01); F25D 29/00 (2006.01); F17C 13/04 (2006.01)
CPC F17C 7/00 (2013.01) [F17C 13/04 (2013.01); F25D 29/001 (2013.01); F17C 2201/0104 (2013.01); F17C 2205/0323 (2013.01); F17C 2221/011 (2013.01); F17C 2221/014 (2013.01); F17C 2221/016 (2013.01); F17C 2223/0161 (2013.01); F17C 2223/033 (2013.01); F17C 2250/043 (2013.01); F17C 2250/0443 (2013.01); F17C 2250/0626 (2013.01); F17C 2250/0689 (2013.01); F17C 2250/07 (2013.01); F17C 2260/02 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for conditioning a liquid cryogen in a tank, comprising:
reducing a pressure of the liquid cryogen in the tank by venting vapor in the tank to atmosphere external to the tank to cool the liquid cryogen in the tank, wherein the pressure of the tank is reduced from 50 psig to 10 psig,
withdrawing the liquid cryogen from the tank to a vaporizer,
vaporizing the liquid cryogen with the vaporizer for providing vapor boil-off, and
introducing the vapor boil-off from the vaporizer into the tank for re-pressurizing the tank with the vapor boil-off,
wherein the reducing, the withdrawing, and the introducing steps condition the liquid cryogen in the tank to a new level lower than a liquid level of the liquid cryogen that existed in the tank before the reducing the pressure of the liquid cryogen in the tank.