btu content
51Sub-bituminous coal — is a type of coal whose properties range from those of lignite to those of bituminous coal and are used primarily as fuel for steam electric power generation. Sub bituminous coal may be dull, dark brown to black, soft and crumbly at the lower end …
52Bituminous coal — A dense coal, usually black, sometimes dark brown, often with well defined bands of bright and dull material, used primarily as fuel in steam electric power generation, with substantial quantities also used for heat and power applications in… …
53Lignite — The lowest rank of coal, often referred to as brown coal, used almost exclusively as fuel for steam electric power generation. It is brownish black and has a high inherent moisture content, sometimes as high as 45 percent The heat content of… …
54Therm — The therm (symbol thm) is a non SI unit of heat energy equal to 100,000 British thermal units (BTU). It is approximately the energy equivalent of burning 100 cubic feet (often referred to as 1 Ccf) of natural gas. Since meters measure volume and… …
55Navajo Generating Station — Navajo Generating Station …
56heat — heatable, adj. heatful, adj. heatless, adj. heatlike, adj. /heet/, n. 1. the state of a body perceived as having or generating a relatively high degree of warmth. 2. the condition or quality of being hot: the heat of an oven. 3. the degree of… …
57Coal grade — This classification refers to coal quality and use. • Briquettes are made from compressed coal dust, with or without a binding agent such as asphalt. • Cleaned coal or prepared coal has been processed to reduce the amount of impurities… …
58Peat — Peat consists of partially decomposed plant debris. It is considered an early stage in the development of coal. Peat is distinguished from lignite by the presence of free cellulose and a high moisture content (exceeding 70 percent). The heat… …
59Subbituminous coal — A coal whose properties range from those of lignite to those of bituminous coal and used primarily as fuel for steam electric power generation. It may be dull, dark brown to black, soft and crumbly, at the lower end of the range, to bright, jet …
60Bituminous coal — is a relatively soft coal containing a tarlike substance called bitumen. It is of higher quality than lignite coal but poorer quality than anthracite coal. Bituminous coal is an organic sedimentary rock formed by diagenetic and submetamorphic… …
