Hydrogen storage, part 2
Cryogenic liquid hydrogen (LH2)
- LH2 has a density of 70.8 kg/m3 at normal boiling point (–253 °C)
- Uncompressed G2L à volume reduction 99.9%
- Advantage of LH2 à high storage density at relatively low pressures (LH2 at atmospheric pressure has 75 % more energy and 1/5 Volume than H2 at 700 bar, ambient temperature)
- LH2 (mass to volume performance) àimportant for transport sector. Demonstrated in commercial vehicles (BMW) in the future could be co-utilized as aircraft fuel
- R&D : more efficient liquefaction processes (power requirements: ca. 1/3 of the stored energy), reduce costs and improve the insulated containers.
Liquefied storage
Vacuum-insulated storage tank
- Indoor and outdoor tank thermos flask principle
- Space between two containers (30 mm)
- Insulation layer up to 70 layers of aluminum foil, alternating with glass fiber mats
- This super insulation corresponds to the insulation effect of a 17 m thick layer of Styrofoam