- 産業: Energy
- Number of terms: 18450
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The distance between the respective elevations of the upstream water surface (headwater) above and the downstream surface water (tailwater) below a hydroelectric power plant.
Industry:Energy
A collector designed to operate in the temperature range of 140 degrees to 180 degrees Fahrenheit, but that can also operate at a temperature as low as 110 degrees Fahrenheit. The collector typically consists of a metal frame, metal absorption panels with integral flow channels (attached tubing for liquid collectors or integral ducting for air collectors), and glazingand insulation on the sides and back.
Industry:Energy
Constraints placed upon mining by societal policies to protect surface features or entities that could be affected by mining. Because laws and regulations may be modified or repealed, the restrictions, including industrial and environmental restrictions, are subject to change.
Industry:Energy
An organic chemical compound of hydrogen and carbon in the gaseous, liquid, or solid phase. The molecular structure of hydrocarbon compounds varies from the simplest (methane, a constituent of natural gas) to the very heavy and very complex.
Industry:Energy
Millions of voltamperes, which are a measure of apparent power. (See definition for apparent power.)
Industry:Energy
Gas that is generated by decomposition of organic material at landfill disposal sites. The average composition of landfill gas is approximately 50 percent methane and 50 percent carbon dioxide and water vapor by volume. The methane percentage, however, can vary from 40 to 60 percent, depending on several factors including waste composition (e.g. carbohydrate and cellulose content). The methane in landfill gas may be vented, flared, combusted to generate electricity or useful thermal energy on-site, or injected into a pipeline for combustion off-site.
Industry:Energy
Chemicals composed of one or more carbon atoms and varying numbers of hydrogen, chlorine, and fluorine atoms.
Industry:Energy
A unit or measure of solar radiation; 1 calorie per square centimeter or 3.69 Btu per square foot.
Industry:Energy
