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

Electric baseboard

Energy; Coal

An individual space heater with electric resistance coils mounted behind shallow panels along baseboards. Electric baseboards rely on passive convection to distribute heated air to the space.

Electric current

Energy; Coal

The flow of electric charge.The preferred unit of measure is the ampere.

Electric energy

Energy; Coal

The ability of an electric current to produce work, heat, light, or other forms of energy. It is measured in kilowatthours.

Cold-deck imputation

Energy; Coal

A statistical procedure that replaces a missing value of an item with a constant value from an external source such as a value from a previous survey. See Imputation.

Casinghead gas (or oil well gas)

Energy; Coal

Natural gas produced along with crude oil from oil wells. It contains either dissolved or associated gas or both.

Delivered energy

Energy; Coal

The amount of energy delivered to the site (building); no adjustment is made for the fuels consumed to produce electricity or district sources. This is also referred to as net energy.

Cash and carry

Energy; Coal

Kerosene, fuel oil, or bottled gas (tank or propane) purchased with cash, by check, or by credit card and taken home by the purchaser. The purchaser provides the container or pays extra for the ...