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

Minimum streamflow

Energy; Coal

The lowest rate of flow of water past a given point during a specified period.

Load factor

Energy; Coal

The ratio of the average load to peak load during a specified time interval.

Intensity per hour

Energy; Coal

Total consumption of a particular fuel(s) divided by the total floor space of buildings that use the fuel(s) divided by total annual hours of operation.

Mining

Energy; Coal

An energy-consuming subsector of the industrial sector that consists of all facilities and equipment used to extract energy and mineral resources.

Load following

Energy; Coal

Regulation of the power output of electric generators within a prescribed area in response to changes in system frequency, tie line loading, or the relation of these to each other, so as to maintain ...

Insulation around water heater

Energy; Coal

Blanket insulation wrapped around the water heater to reduce loss of heat. To qualify under this definition, this wrapping must be in addition to any insulation provided by the manufacturer.

Mine count

Energy; Coal

The number of mines, or mines collocated with preparation plants or tipples, located in a particular geographic area (state or region). If a mine is mining coal across two counties within a state, or ...