A type of solar photovoltaic device made in a continuous process of pulling material from a molten bath of photovoltaic material, such as silicon, to form a thin sheet of material.

A construction element used to cover the exterior of wall framing and roof trusses.

A popular term used to describe the heating effect due to the trapping of long wave (length) radiation by greenhouse gases produced from natural and human sources.

A solar thermal electric central reciever power plant ("power tower") located in Barstow, California, and completed in 1981. The Solar One had a design capacity of 10,000 peak kilowatts, and was composed of a receiver located on the top of a tower surroun ...

The ratio of average energy demand (load) to maximum demand (peak load) during a specific period.

A stationary or rotating vent used to ventilate attics or cathedral ceilings; usually made of galvanized steel, or polypropylene.

A popular term used for an evaporative cooling device.

A type of solar thermal system where sunlight is concentrated by a curved reflector onto a pipe containing a working fluid that can be used for process heat or to produce electricity. The world's largest solar thermal electric power plants use solar troug ...

A heat exchanger in which two fluids flow in opposite directions for transfer heat energy from one to the other.

A single photovoltaic device.

A type of furnace in which fuel is burned and the heat is used to produce steam.

An electronic device that allows current to flow in one direction only.

The value or purchasing power of a dollar in a specified year carried forward or backward.

The ability of an electric power consumer to purchase electricity from a supplier of their choice without being physically inhibited by the owner of the electric distribution and transmission system to which the consumer is connected to. (See also Open Ac ...

The period marked by successive crossing of the earth's meridian by the sun; the hour angle of the sun at a point of observance (apparent time) is corrected to true (solar) time by taking into account the variation in the earth's orbit and rate of rotatio ...

Water in vapor form; used as the working fluid in steam turbines and heating systems.

A type of window having two layers (panes or glazing) of glass separated by an air space. Each layer of glass and surrounding air space reradiates and traps some of the heat that passes through thereby increasing the windows resistance to heat loss (R-val ...

A machine supplied with external energy that is converted into force and/or motion.

The amount of power density in sunlight received at the earth's surface at noon on a clear day (about 1,000 Watts/square meter).

A unit that equals 20 long hundredweight or 2,240 pounds. Used mainly in England.