Liquid to liquid refueling systems
LH2 pumps for liquid refueling stations
In order to refuel a cryogenic tank with Liquid Hydrogen, one solution consists in pressurising the upstream tank in order to provide a sufficient pressure difference to flow liquid hydrogen to the application tank. This simple solution could lead to high vaporisation and a non-optimized thermo-hydraulic condition in the application tank. Furthermore, the upstream tank will have to support a pressure of 5 to 10 bar.
On the other side, a liquid pump can be used in order to provide pressure difference and to flow liquid hydrogen. Absolut System is developing small and mid-range liquid hydrogen pump to perform cryogenic tank filling without any upstream tank pressurisation. Thus, the upstream tank is maintained at a low pressure and the thermohydraulic state of liquid hydrogen in the application tank is preserved.