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(11) | EP 4 477 979 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | SYSTEMS AND METHODS FOR HYDROGEN LIQUEFACTION |
| (57) A hydrogen liquefaction system that utilizes two separate compression services, one
controlled via pressure and the other via capacitance, to maintain the rotating equipment
at its design point. The system also employs an intermediate flash drum to capture
boil off gas and a catalyst bed to convert para-hydrogen into ortho-hydrogen. Changing
pressure levels within the turbo expander loop are used to transfer hydrogen from
the expander loop into the "condensate" or "feed" streams, while maintaining the "condensate"
stream at a constant pressure. The system is capable of efficiently producing high-purity
liquid hydrogen at a low cost, making it a valuable tool in industries such as fuel
cells, energy storage, and aerospace.
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