The abrupt and large increase in electrical conductivity exhibited by some metals as the temperature approaches absolute zero.

The production of electrical current from light.

To reduce or avoid the consumption of a resource or commodity.

The prevailing or average weather conditions of a geographic region.

A solar photovoltaic product that generally consists of groups of PV cells electrically connected together to produce a specified power output under standard test conditions, mounted on a substrate, sealed with an encapsulant, and covered with a protectiv ...

Major energy consuming sectors of the economy. The Commercial Sector includes commercial buildings and private companies. The Industrial Sector includes manufacturers and processors. The Residential Sector includes private homes. The Transportation Sector ...

A hydrocarbon gas, C3H8, occurring in crude oil, natural gas, and refinery cracking gas. It is used as a fuel, a solvent, and a refrigerant. Propane liquefies under pressure and is the major component of liquefied petroleum (LPG).

A small groove scribed into the surface of a solar photovoltaic cell which is filled with metal for contacts.

In reference to wind energy, for any given instant, the power available in the wind is proportional to the cube of the wind velocity; when wind speed doubles, the power availability increases eight times.

The height above the ground that a horizontal axis wind turbine's hub is located.

The volume of a unit weight of a substance at a specific temperature and pressure.

A heat exchanger that transfers heat contained in a liquid heat transfer fluid to another liquid.

Sensible and latent heat contained in combustion gases and vapor emitted to the atmosphere.

The trapping of light by refraction and reflection at critical angles inside a semiconductor device so that it cannot escape the device and must be eventually absorbed by the semiconductor.

A turbine that generates power from the combustion of a fuel.

An engine in which fuel is burned (or heat is applied) to the outside of a cylinder; a Stirling engine.

The physical measure of the subjective sensation of brightness; measured in lumens.

A value that describes the ability of a material to conduct heat. The number of Btu that flow through 1 square foot of material, in one hour. It is the reciprocal of the R-Value (U-Value = 1/R-Value).

Transmit high-voltage electricity from the transformer to the electric distribution system.

An electrochemical device that converts chemical energy directly into electricity.