The planting, cultivation, and harvesting of a single species of crop in a specified area.

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 ...

That part of an electricity bill that is based on the amount of electrical energy consumed or supplied.

Recombination occurring in the emitter region of a photovoltaic cell.

The demand of a consumer of electricity at the time of a power supplier's peak system demand.

A term used to describe solar thermal, central receiver, power systems, where an array of reflectors focus sunlight onto a central receiver and absorber mounted on a tower.

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

A means of billing electric power consumers to pay for the costs of demand side management/energy conservation measures and programs. (See also Benefits Charge.)

A gasifier in which the feedstock (fuel) is suspended by the movement of gas to move it through the gasifier.

Legal documents that regulate construction to protect the health, safety, and welfare of people. Codes establish minimum standards but do not guarantee efficiency or quality.

A popular term for localized or on-site power generation.

An amount paid by a customer for being connected to an electricity supplier's transmission and distribution system.

The analysis of atmospheric conditions, particularly moisture in the air.

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 commmon term refering to an electricity transmission and distribution system.

A solar energy system designed to provide heat to individual rooms in a building.

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

A method used to estimate building heating loads by assuming that heat loss and gain is proportional to the equivalent heat-loss coefficient for the building envelope.

Air that is returned to a heating or cooling appliance from a heated or cooled space.

A unit of pressure [hydraulic (liquid) or pneumatic (gas)] that does not include atmospheric pressure.