20 Terms
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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.
Industry: Energy
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Coal
Housing unit
Energy; Coal
A house, an apartment, a group of rooms, or a single room if it is either occupied or intended for occupancy as separate living quarters by a family, an individual, or a group of one to nine ...
Mean operating hours
Energy; Coal
The arithmetic average number of operating hours per building is the weighted sum of the number of operating hours divided by the weighted sum of the number of buildings.
Leading edge
Energy; Coal
In reference to a wind energy conversion system, the area of a turbine blade surface that first comes into contact with the wind.
Mean power output (of a wind turbine)
Energy; Coal
The average power output of a wind energy conversion system at a given meanwind speed based on a Raleigh frequency distribution.
Lease and plant fuel
Energy; Coal
Natural gas used in well, field, and lease operations (such as gas used in drilling operations, heaters, dehydrators, and field compressors) and as fuel in natural gas processing plants.
Hub height
Energy; Coal
In a horizontal-axis wind turbine, the distance from the turbine platform to the rotor shaft.
Mean square feet per building
Energy; Coal
The arithmetic average square feet per building is the weighted sum of the total squarefeet divided by the weighted sum of the number of buildings.
