PRIMARY ENERGY

'Primary energy' is energy contained in raw fuels and any other forms of energy received by a system as input to the system. The concept is used especially in energy statistics in the course of compilation of energy balances.

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Conversion to secondary energy

See also

Conversion to secondary energy

Primary energies are transformed in energy conversion processes to more convenient forms of energy, such as electrical energy and cleaner fuels. In energy statistics these forms are called secondary energy.

See also

★ Energy development

★ Future energy development