A type of window glazing films used to block the infrared (heat) portion of the solar spectrum but admit a higher portion of visible light.

A popular term for energy produced from renewable energy resources.

A measure of the quality of a light source by expressing the color appearance correlated with a black body.

The transfer of heat by means of air currents.

The process of storing, or converting energy from one form to another, for later use; storage devices and systems include batteries, conventional and pumped storage hydroelectric, flywheels, compressed gas, and thermal mass.

The minimum temperature at which sufficient vapor is released by a liquid or solid (fuel) to form a flammable vapor-air mixture at atmospheric pressure.

The mean distance a free electron or hole moves before recombining with another hole or electron.

An arrangement of photovoltaic cells or material mounted on a rigid flat surface with the cells exposed freely to incoming sunlight.

The fine particulate matter entrained in the flue gases of a combustion power plant.

The process of controlling indoor moisture levels and condensation.

A source of power (electricity) that can displace power from another source so that source's power can be transmitted to more distant loads.

Energy loads that can be shut off or disconnected at the supplier's discretion or as determined by a contractual agreement between the supplier and the customer.

An axail flow fan mounted in a section of duct to move conditioned air.

The amount of solar energy that passes through a glazing material, expressed as a percentage.

The potentially useful byproducts of ethanol fermentation process.

The interior area of a building, calculated in square feet or meters.

The conversion of electric power to visible light by using an electric charge to excite gaseous atoms in a glass tube. These atoms emit ultraviolet radiation that is absorbed by a phosphor coating on the walls of the lamp tube. The phosphor coating produc ...

The apparent angle of the sun north or south of the eath's equatorial plane. The earth's rotation on its axis causes a daily change in the declination.

see Peak Watt.

A solid that contains pores; normally, it refers to interconnected pores that can transmit the flow of fluids. (The term refers to the aquifer geology when discussing sites for CAES.)