Daan is 22 years old and finished his bachelor’s degree in Mechanical Engineering at the TU Delft last year. ‘I am thinking of pursuing a master’s in Mechanical Engineering: Energy Flow and Process Technology next year. This brings safety concerns, because you are not able to vent hydrogen gas everywhere. Because the tank is not cooled, hydrogen gas boils off as the liquid hydrogen heats up. Only then do we start with hydrogen gas, with liquid hydrogen being the last step.’