Due to its low weight, hydrogen has the best mass-related energy density of all fuels. Some weight-related (gravimetric) calorific values are listed below for comparison.
The volume-related (volumetric) energy density of hydrogen at atmospheric pressure, on the other hand, is quite low compared to the other known energy carriers. For this reason, hydrogen is stored in most applications at high pressures, in cars, for example, at around 700 bar. The energy required for compression to 700 bar is about 10 % of the hydrogen calorific value.
To make these energy densities comparable under pressure, the energy density of hydrogen under pressure can be calculated in the following calculator. All calculations are performed under real gas parameters and are based on the calorific values of the substances.
To make these energy densities comparable under pressure, the energy density of hydrogen under pressure can be calculated in the following calculator. All calculations are performed under real gas parameters and are based on the calorific values of the substances.
I have programmed all online tools to the best of my knowledge and belief, but errors can of course still not be ruled out. Any use is therefore at your own risk. Any legal or recourse claims are excluded.