A turbine that has a runner with attached blades similar to a propeller used to drive a ship. As water passes over the curved propeller blades, it causes rotation of the shaft.

A window located on the roof of a structure to provide interior building spaces with natural daylight, warmth, and ventilation.

An axail flow fan mounted in a section of duct to move conditioned air.

The process of storing, or converting energy from one form to another, for later use; storage devices and systems include batteries, conventional and pumped storage hydroelectric, flywheels, compressed gas, and thermal mass.

This committee has oversight over the generation and marketing of electric power from federal water projects by federally charted or Federal RPM authorities, measures and matters concerning water resources planning, compacts relating to use and apportionm ...

The time of the day, at a specific location, when the sun reaches its highest, apparent point in the sky; equal to true or due, geographic south.

Restrictions on the use of a property.

The process by which sunlight directly enters a building through the windows and is absorbed and stored in massive floors or walls.

The process of controlling indoor moisture levels and condensation.

The space between a hanging ceiling and the floor above or roof; usually contains HVAC ducts, electrical wiring, fire suppression system piping, etc.

Pounds of pressure per square inch.

A source of power (electricity) that can displace power from another source so that source's power can be transmitted to more distant loads.

The lower or net heat of combustion for a fuel that assumes that all products of combustion are in a gaseous state. (See Net Heating Value below.)

A tax credit granted for specific types of investments.

Wind turbines that operate at a constant rotor revolutions per minute (RPM) and are optimized for energy capture at a given rotor diameter at a particular speed in the wind power curve.

The ratio of the sum of the noncoincidental maximum demands of two or more loads to their coincidental maximum demands for the same period.

The conversion of electric power to visible light by using an electric charge to excite gaseous atoms in a glass tube. These atoms emit ultraviolet radiation that is absorbed by a phosphor coating on the walls of the lamp tube. The phosphor coating produc ...

A measure of the unavailable or unusable energy in a system; energy that cannot be converted to another form.

see Peak Watt.

The fossil fuels: coal, oil, and natural gas.