US 12,422,101 B2
System and method for controlling boil-off gas from liquefied hydrogen
Jong Yeol Yi, Daegu (KR); Yong Seong Jeon, Daegu (KR); Jae Hyun Ma, Daegu (KR); Ji Hoon Joung, Daegu (KR); Hae Chul Han, Daegu (KR); Eun Young Yun, Daegu (KR); and Jin Yeong Park, Daegu (KR)
Assigned to KOREA GAS CORPORATION, Daegu (KR)
Appl. No. 18/003,568
Filed by KOREA GAS CORPORATION, Daegu (KR)
PCT Filed Jul. 7, 2022, PCT No. PCT/KR2022/009822
§ 371(c)(1), (2) Date Dec. 28, 2022,
PCT Pub. No. WO2024/010114, PCT Pub. Date Jan. 11, 2024.
Claims priority of application No. 10-2022-0082529 (KR), filed on Jul. 5, 2022.
Prior Publication US 2024/0247759 A1, Jul. 25, 2024
Int. Cl. F17C 9/04 (2006.01)
CPC F17C 9/04 (2013.01) [F17C 2201/0114 (2013.01); F17C 2221/012 (2013.01); F17C 2223/0161 (2013.01); F17C 2227/0157 (2013.01); F17C 2227/0323 (2013.01); F17C 2227/0365 (2013.01); F17C 2265/033 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for controlling boil-off gas from liquefied hydrogen, comprising:
operating a boil-off gas controlling system that comprises:
at least two storage tanks storing liquefied hydrogen, and
an internal temperature maintenance device disposed inside each of the at least two storage tanks and configured to cause each storage tank to be operated in a high-temperature mode or in a low-temperature mode to induce or suppress vaporization reaction of the stored liquefied hydrogen,
wherein the at least two storage tanks comprise a first storage tank,
wherein operating the boil-off gas controlling system comprises operating the first storage tank in the high-temperature mode or the low-temperature mode,
wherein operating the first storage tank in the low-temperature mode comprises maintaining at least a portion of the liquefied hydrogen stored in the first storage tank at a first temperature being a densification temperature to suppress an ortho-para conversion reaction of hydrogen, and
wherein operating the first storage tank in the high-temperature mode comprises maintaining at least a portion of the liquefied hydrogen stored in the first storage tank at a second temperature being a temperature exceeding a triple point of the liquefied hydrogen through recovery of cold heat from the liquefied hydrogen stored in the first storage tank.