US 12,313,225 B2
Hydrogen leakage detection from a hydrogen refueling station
Claus Due Sinding, Silkeborg (DK)
Assigned to CAVENDISH HYDROGEN A/S, Herning (DK)
Appl. No. 17/771,586
Filed by Nel Hydrogen A/S, Herning (DK)
PCT Filed Sep. 14, 2020, PCT No. PCT/DK2020/050252
§ 371(c)(1), (2) Date Apr. 25, 2022,
PCT Pub. No. WO2021/078340, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. PA 2019 70665 (DK), filed on Oct. 25, 2019.
Prior Publication US 2022/0373134 A1, Nov. 24, 2022
Int. Cl. F17C 5/06 (2006.01)
CPC F17C 5/06 (2013.01) [F17C 2221/012 (2013.01); F17C 2221/033 (2013.01); F17C 2250/043 (2013.01); F17C 2250/0439 (2013.01); F17C 2250/0473 (2013.01); F17C 2250/0491 (2013.01); F17C 2260/038 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of detecting a leakage in a hydrogen refuelling station comprising a plurality of hydrogen storage tanks, said method comprising the steps of:
establishing at a first time a first representation of at least one fluid parameter associated with hydrogen for at least one of said plurality of hydrogen storage tanks;
establishing at a second time a second representation of said at least one fluid parameter for said at least one of said plurality of hydrogen storage tanks;
determining a relative difference between said first and second representation of said at least one fluid parameter;
for said at least one hydrogen storage tank comparing said relative difference with a threshold difference to detect a leakage in said at least one hydrogen storage tank,
wherein said at least one fluid parameter comprises density, and wherein said density is established on the basis of measurements of pressure and temperature.