Primary energy is energy that has not been subjected to any conversion or transformation process.
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. Primary energy includes non-renewable energy and renewable energy.
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. Secondary energy is a energy which has been transformed from one form to another. Electricity is the most common example being transfromed from coal, oil, natural gas, wind, etc.
References
- Kydes, Andy (Lead Author); Cutler J. Cleveland (Topic Editor). 2007. "Primary energy." In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth June 1, 2006; Last revised August 14, 2007; Retrieved November 15, 2007].
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