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

barrels per stream day

Energy; Coal

The maximum number of barrels of input that a distillation facility can process within a 24-hour period when running at full capacity under optimal crude and product slate conditions with no ...

base (cushion) gas

Energy; Coal

The volume of gas needed as a permanent inventory to maintain adequate reservoir pressures and deliverability rates throughout the withdrawal season. All native gas is included in the base gas ...

base bill

Energy; Coal

A charge calculated by taking the rate from the appropriate electric rate schedule and applying it to the level of consumption.

base load

Energy; Coal

The minimum amount of electric power delivered or required over a given period of time at a steady rate.

base load capacity

Energy; Coal

The generating equipment normally operated to serve loads on an around-the-clock basis.

base load plant

Energy; Coal

A plant, usually housing high-efficiency steam-electric units, which is normally operated to take all or part of the minimum load of a system, and which consequently produces electricity at an ...

base period

Energy; Coal

The period of time for which data used as the base of an index number, or other ratio, have been collected. This period is frequently one of a year but it may be as short as one day or as long as the ...