Economics of hydrogen production and liquefaction by geothermal energy

► Seven models for the production and liquefaction of hydrogen by geothermal energy. ► The cost of hydrogen production ranges between 0.979 $/kg H2 and 2.615 $/kg H2. ► The cost of hydrogen decreases as the geothermal water temperature increases. ► Capital costs for the models involving hydrogen liquefaction are greater.