The prevailing or average weather conditions of a geographic region.

The average time a minority carrier exists before recombination.

A form of solar concentrating collector that does not track the sun.

A type of photovoltaic device in which the electricity induced in the cell is used immediately within the cell to produce a chemical, such as hydrogen, which can then be withdrawn for use.

An air conditioning system that comes in two to five pieces: one piece contains the compressor, condenser, and a fan; the others have an evaporator and a fan. The condenser, installed outside the house, connects to several evaporators, one in each room to ...

A mixture of substances that has a melting point lower than that of any mixture of the same substances in other proportions.

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

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

The use of two or more different fuels (e.g. wood and coal) simultaneously in the same combustion chamber of a power plant.

The generation of electricity or shaft power by an energy conversion system and the concurrent use of rejected thermal energy from the conversion system as an auxiliary energy source.

The ratio of the electric power produced by a photovoltaic device to the power of the sunlight incident on the device.

The total amount of electricity produced by a power plant.

The low effective temperature of the sky on a clear night.

The liquid resulting when water vapor contacts a cool surface; also the liquid resulting when a vaporized working fluid (such as a refrigerant) is cooled or depressurized.

A type of High-Intensity Discharge (HID) lamp that uses sodium under high pressure as the primary light-producing element. These high efficiency lights produce a golden white color and are used for interior industrial applications, such as in warehouses a ...

The storage of compressed air in a container for use to operate a prime mover for electricity generation.

As defined by the Comprehensive National Energy Act of 1992 (or the Energy Policy Act; EPAct): any organic matter from a plant which is planted for the exclusive purpose of being used to produce energy." This does not include wood or agricultural wastes o ...

The process of degrading organic material (biomass) by microorganisms in aerobic conditions.

Consists of businesses that are not engaged in transportation or manufacturing or other types of industrial activities. Standard Industrial Classification (SIC) codes for commercial establishments are 50 through 87, 89, and 91 through 97.

The interior space of a building that is heated or cooled.