Coal

Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.

Industry: Energy

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Coal

In-use (vehicles)

Energy; Coal

Implies that a vehicle is: 1. Registered with the Government of one or more States, the District of Columbia, the Commonwealth of Puerto Rico, or the Virgin Islands; or 2. The vehicle is owned or ...

Methanogens

Energy; Coal

Bacteria that synthesise methane, requiring completely anaerobic conditions for growth.

Inadvertent power exchange

Energy; Coal

An un intended power exchange among utilities that is either not previously agreed upon or in an amount different from the amount agreed upon.

Incremental energy costs

Energy; Coal

The additional cost of producing and/or transmitting electric energy above some previously determined base cost.

Metric conversion factors (for floorspace)

Energy; Coal

Floorspace estimates may be converted to metric units by using the relationship, 1 square foot is approximately equal to .0929 squaremeters. Energy estimates may be converted to metric units by using ...

Independent power producer

Energy; Coal

A corporation, person, agency, authority, or other legal entity or instrumentality that owns or operates facilities for the generation of electricity for use primarily by the public, and that is not ...