The power output of a device under specific or nominal operating conditions.

A component of a water heating system that opens at a designated temperature or pressure to prevent a possible tank, radiator, or delivery pipe rupture.

Those privately or publicly owned establishments that generate, transmit, distribute, or sell electricity.

The generation of an electric current, when two conductors of different metals are joined at their ends to form a circuit, with the two junctions kept at different temperatures.

The maximum value of natural solar insolation.

An electric current induced by radiant energy.

A wheel that is designed to use the weight and/or force of moving water to turn it, primarily to operate machinery or grind grain.

The fine liquid or solid particles contained in combustion gases. The quantity and size of particulates emitted by cars, power and industrial plants, wood stoves, etc are regulated by the U.S. Environmental Protection Agency.

A solar energy concentrating technology that uses a linear receiver that tracks the focal area of a reflector or array of reflectors.

The process of implementing measures to reduce peak power demands on a system.

A configuration of an electrical circuit in which the positive lead is connected to the negative lead of another energy producing, conducting, or consuming device. The voltages of each device are additive, whereas the current is not.

Any material that has a limited capacity for conducting an electric current. Certain semiconductors, including silicon, gallium arsenide, copper indium diselenide, and cadmium telluride, are uniquely suited to the photovoltaic conversion process.

The thermal energy used in an industrial process.

The change in the power available in the wind due to changes in the windspeed or velocity profile; the windpower profile is proportional to the cube of the wind speed profile.

An index that combines sensible temperature and air humidity to arrive at a number that closely responds to the effective temperature; used to relate temperature and humidity to levels of comfort.

For valves and fittings, implies that they are suitable for working pressures between 125 to 175 pounds per square inch.

The amount of heat in a quantity of matter at a specific temperature and pressure.

The compound (working fluid) used in air conditioners, heat pumps, and refrigerators to transfer heat into or out of an interior space. This fluid boils at a very low temperature enabling it to evaporate and absorb heat.

A type of cooling system that uses a charging and discharging cycle with a thermal or latent heat storage subsystem.

A discontinuance of electric power supply.