The electrical and magnetic fields created by the presence or flow of electricity in an electrical conductor or electricity consuming appliance or motor.

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

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.

A discontinuance of electric power supply.

A machine for converting mechanical energy into electrical energy by magneto-electric induction; may be used as a motor.

The amount that the voltage, current, and/or power output of a solar cell changes due to a change in the cell temperature.

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 difference between the total cooling effect and the dehumidifying effect.

A device that uses electronic components to regulate the voltage of fluorescent lamps.

A product of crude oil that is used for space heating, diesel engines, and electrical generation.

A measure of the percent of moisture actually in the air compared with what would be in it if it were fully saturated at that temperature. When the air is fully saturated, its relative humidity is 100 percent.

The heat-transfer (exchanger) component of a heatpump, located outdoors, from which heat is collected in the heating mode, or expelled in the cooling mode.

Space cooling achieved by shading, natural (unassisted, as opposed to forced) ventilation, conduction control, radiation, and evaporation; also called passive cooling.

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

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 device or media that absorbs heat for storage for later use.

The maximum energy demand or load in a specified time period.

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.

The thermal energy used in an industrial process.

A heat exchanger in which heat is recovered from the products of combustion.