US 11,686,434 B1
Submerged multi-mode cryopump for refueling hydrogen, system having the same, and method of using the same
Xianming Li, Orefield, PA (US); Anthony Ku, Fremont, CA (US); Edward Youn, Pacific Grove, CA (US); and Ashwin Ramteke, San Jose, CA (US)
Assigned to China Energy Investment Corporation Limited, Beijing (CN); and National Institute of Clean-and-Low-Carbon Energy, Beijing (CN)
Filed by China Energy Investment Corporation Limited, Beijing (CN); and National Institute of Clean-and-Low-Carbon Energy, Beijing (CN)
Filed on Feb. 22, 2022, as Appl. No. 17/677,394.
Int. Cl. F17C 5/00 (2006.01); F17C 13/02 (2006.01); F17C 13/04 (2006.01); F17C 5/02 (2006.01); G05D 16/20 (2006.01)
CPC F17C 5/007 (2013.01) [F17C 5/02 (2013.01); F17C 13/025 (2013.01); F17C 13/04 (2013.01); G05D 16/2013 (2013.01); F17C 2201/0109 (2013.01); F17C 2201/035 (2013.01); F17C 2205/0326 (2013.01); F17C 2205/0352 (2013.01); F17C 2221/012 (2013.01); F17C 2223/0161 (2013.01); F17C 2227/0135 (2013.01); F17C 2227/0178 (2013.01); F17C 2250/043 (2013.01); F17C 2265/065 (2013.01); F17C 2270/0184 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A system, comprising:
a cryotank configured to store a liquefied fuel therein;
a pump configured to be disposed inside the cryotank and provide a stream of the liquefied fuel from the cryotank, the pump having a piston, an intake port, and an isolation valve configured to supply the liquefied fuel to the intake port;
a first pipe fluidly connected to a vapor pump chamber configured to hold vapor of the liquefied fuel in the pump;
a second pipe fluidly connected to a first liquid pump chamber configured to hold the liquefied fuel contacting a backside of the piston; and
a switching valve fluidly connected to the first pipe and the second pipe, and configured to flow the vapor of the liquefied fuel in the pump and the liquefied fuel contacting the backside of the piston to the intake port of the pump through a third pipe.