The maximum value of natural solar insolation.

The process of using heat that is rejected in one part of a cycle for another function or in another part of the cycle.

A device that transfers heat by the continuous evaporation and condensation of an internal fluid.

The ability to send or wheel electric power to a customer over a transmission and distribution system that is not owned by the generator (seller) of the power.

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

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

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.

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.

A measure of the amount of energy lost during the generation, transmission, and distribution of electricity.

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.

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.

An electric current induced by radiant energy.

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 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 incandescent lamp with an interior coating of aluminum that reflects light to the front of the bulb. They are designed to spread light over specific areas.

A discontinuance of electric power supply.

The addition of dopants to a semiconductor.

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

A unit or measure of solar radiation; 1 calorie per square meter or 3.69 Btu per square foot.

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