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

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

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

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

A body of water that contains brackish (highly saline) water that forms layers of differing salinity (stratifies) that absorb and trap solar energy. Solar ponds can be used to provide heat for industrial or agricultural processes, building heating and coo ...

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

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

The tank of a water heater.

Recombination occurring in the emitter region of a photovoltaic cell.

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 power plant that generates power by combusting a fuel.

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

The device in an air conditioner or heat pump in which the refrigerant condenses from a gas to a liquid when it is depressurized or cooled.

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

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 vehicle with an engine capable of operating on two different types of fuels.

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 plan developed by an electric utility, sometimes as required by a public regulatory commission or agency, that defines the short and long term capacity additions (supply side) and demand side management programs that it will undertake to meet projected ...

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