Primary energy

Primary Energy

Primary energy (/ˈpraɪmɛri ˈɛnərdʒi/) refers to the energy forms that are found in nature and have not been subjected to any human engineered conversion process. It is energy contained in raw fuels, and other forms of energy received as input to a system.

Etymology

The term "primary" comes from the Latin word primarius meaning "first in time, original" and "energy" comes from the Greek word energeia meaning "activity, operation".

Related Terms

• Energy: The capacity of a physical system to perform work. Energy exists in several forms such as heat, kinetic or mechanical energy, light, potential energy, electrical, or other forms.
• Secondary energy: This is the energy product (electricity, refined oil, etc.) that is converted from primary energy.
• Renewable energy: Energy that is collected from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.
• Non-renewable energy: Energy that comes from resources which are naturally depleted on a human timescale, such as fossil fuels like coal, oil, and natural gas.
• Energy conversion: The process of changing one form of energy to another.
• Energy consumption: The amount of energy consumed by business processes and systems.
• Energy efficiency: The goal to reduce the amount of energy required to provide products and services.

See Also

• Energy development
• Energy storage
• Energy conservation
• Energy policy
• Energy crisis

External links

• Medical encyclopedia article on Primary energy
• Wikipedia's article - Primary energy

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