A unit of heat containing 100,000 British thermal units (Btu).

A type of impulse hydropower turbine where water passes through nozzles and strikes cups arranged on the periphery of a runner, or wheel, which causes the runner to rotate, producing mechanical energy. The runner is fixed on a shaft, and the rotational mo ...

The transformation on a compound or material into one or more substances by heat alone (without oxidation). Often called destructive distillation. Pyrolysis of biomass is the thermal degradation of the material in the absence of reacting gases, and occus ...

These are state government agencies responsible for the regulation of public utilities within a state or region. A state legislature oversees the PUC by reviewing changes to utility laws, rules and regulations and approving the PUC's budget. The commissio ...

The pressure corresponding to the outlet velocity of a fan; the kinetic energy per unit volume of flowing air.

A method of preventing oxidation of the exposed metal in structures by imposing between the structure and the ground a small electrical voltage.

The mean wind speed over a specified period of time.

The transparent or opaque sphere in an electric light that the electric light transmits through.

A type of heat pump that transfers heat from outdoor air to indoor air during the heating season, and works in reverse during the cooling season.

An enzyme complex, produced by fungi and bacteria, capable of decomposing cellulose into small fragments, primarily glucose.

A mound of dirt next to exterior walls to provide wind protection and insulation.

An electricity supplier rate structure in which the per unit price of electricity decreases as the amount of energy increases. Normally only available to very large consumers.

The heating capacity of a steam boiler; expressed in Btu per hour (Btu/h), or horsepower, or pounds of steam per hour.

A long, underground metal or plastic pipe through which air is drawn. As air travels through the pipe it gives up some of its heat to the soil, and enters the house as cooler air.

The downward facing structural element that is directly opposite the floor.

Energy terms

These are separate and distinct organizational agencies within the U.S. DOE that market power at federal multipurpose water projects at lowest possible rates to consumers consistent with sound business principles. There are five PMA's: Alaska Power Admini ...

A generic term for a glazed opening that allows daylight to enter into a building and can be opened for ventilation.

A unit of power equal to 1 billion Watts; 1 million kilowatts, or 1,000 Megawatts.

A total life cycle cost divided into equal amounts.