“…However, when storing hydrogen in a liquid state, cryogenic tanks that maintain a low temperature are necessary. Limiting heat exchange with the environment with very good results is provided by multilayer tanks with a vacuum space between the layers [1,2,8,14,16,18,22]. Due to the low boiling point of hydrogen, heat exchangers also appear to be necessary in the tank itself to prevent vaporization of the hydrogen and, consequently, an uncontrolled increase in tank pressure.…”