Energy carrier

Fuels are substances whose energy content is available for energy conversion processes. As a primary or Rohenergieträger is called energy sources that are available in nature. Secondary energy carriers are produced from the former by conversion. Energy sources differ in their energy density, transport and storage capacity as well as the effort and efficiency of its use.

Examples

  • Fossil fuels (oil, coal, natural gas)
  • Nuclear fuels such as uranium
  • Biomass
  • Fat, carbohydrates and proteins in the food

Colloquially Renewable energies are a lump sum referred to as renewable energy sources, even though the name on the wind and sunlight does not fit.

  • Fuels from the petroleum refining
  • Ethanol from the fermentation of biomass
  • Instance, hydrogen from wind energy
  • Compressed air
  • Glucose from the energy store glycogen
  • ATP from glucose

Electric Power ( "Power " ) is sometimes performed under fixed price energy sources (better " form of energy ").

Energy density

Based on the mass:

  • Hydrogen: 33.3 kWh / kg
  • Natural gas: 13.9 kWh / kg
  • Gasoline: 12.7 kWh / kg

In the volume -related:

  • Gasoline: 8760 kWh / m³
  • Natural gas ( 20 MPa): 2580 kWh / m³
  • Hydrogen (liquid): 2360 kWh / m³
  • Hydrogen gas ( 20 MPa): 530 kWh / m³
  • Hydrogen gas (atmospheric pressure): 3 kWh / m³
Chemical substance Wind power Energy storage Adenosine triphosphate
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