Facility and method for supplying liquefied hydrogen

A facility for supplying liquefied hydrogen, comprising:

• a source of gaseous hydrogen;
• a liquefier configured to be fed with gaseous hydrogen by the source and to produce liquefied hydrogen;
• a first liquefied hydrogen tank configured to receive liquefied hydrogen coming from the liquefier, via a first feed pipe, and being configured to store this liquefied hydrogen at a pressure which is below a first predetermined pressure;
• at least one transfer line configured to allow liquefied hydrogen to be transferred from the first tank to a tank to be filled, the transfer line being connected to the first tank by at least one transfer pipe;
• a second liquefied hydrogen tank configured to receive liquefied hydrogen coming from the first tank, via a second feed pipe, the second tank being configured to store this liquefied hydrogen;
• a pressurization system configured to allow the second tank to be pressurized at a second predetermined pressure which is greater than the first predetermined pressure;
• at least one vaporization pipe connecting the second tank and the pressurization system to the transfer line in order to allow gaseous hydrogen under pressure to be transferred from the second tank and from the pressurization system to the transfer line, for the purpose of an operation of purging and cleaning the transfer line;
• and
• a vaporization system configured to heat the gaseous hydrogen flowing in the vaporization pipe.