Hydrogen is energy carrier not a primary energy source
The energy density per unit volume of both liquid hydrogen and compressed hydrogen gas at any practicable pressure is significantly less than that of traditional fuel sources, although the energy density per unit fuel mass is higher.
Energy density per unit mass: Energy density per unit volume:
- Hydrogen: 33,3 kWh/kg
- natural gas: 13,9 kWh/kg
- benzine: 12,7 kWh/kg
- Hydrogen (liquid): 2360 kWh/m³
- benzine: 8760 kWh/m³
- natural gas at 20 MPa: 2580 kWh/m³
- Hydrogen gas at 20 MPa: 530 kWh/m³
- Hydrogen gas at atmospheric pressure: 3 kWh/m³
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