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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.

Contributors in Coal

Coal

Thermal storage

Energy; Coal

Storage of heat or heat sinks (coldness) for later heating or cooling. Examples are the storage of solar energy for night heating; the storage of summer heat for winter use; the storage of winter ice ...

Occupancy sensors

Energy; Coal

These are also known as "ultrasonic switchers." When movement is detected, the lights are turned on and remain on as long as there is movement in the room.

Production, crude oil

Energy; Coal

The volumes of crude oil that are extracted from oil reservoirs. These volumes are determined through measurement of the volumes delivered from lease storage tanks orat the point of custody transfer, ...

Securitize

Energy; Coal

To aggregate contracts into one pool, which then offers shares for sale in the investment market. This strategy diversifies project risks from what they would be if each project were financed ...

Transmission circuit

Energy; Coal

A conductor used to transport electricity from generating stations to load.

Pressurized-water reactor (PWR)

Energy; Coal

A nuclear reactor in which heat is transferred from the core to a heat exchanger via water kept under high pressure, so that high temperatures can be maintained in the primary system without boiling ...

Room air conditioner

Energy; Coal

Air-conditioning units that typically fit into the window or wall and are designed to cool only one room.

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