Restrictions on the use of a property.

The fossil fuels: coal, oil, and natural gas.

A measure of the unavailable or unusable energy in a system; energy that cannot be converted to another form.

Wind turbines that operate at a constant rotor revolutions per minute (RPM) and are optimized for energy capture at a given rotor diameter at a particular speed in the wind power curve.

A type of anaerobic digester that has a horizontal tank in which a constant volume of material is added and forces material in the tank to move through the tank and be digested.

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 ...

A fuel gas with a heating value between 90 and 200 Btu per cubic foot.

That portion of an electricity supply system used to deliver electricity from points on the transmission system to consumers.

A water and energy conserving device that limits the amount of water that a faucet or showerhead can deliver.

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

A solar heating system that uses a liquid as the heat transfer fluid.

A coating applied to the surface of the glazing of a window to reduce heat transfer through the window.

A commonly used analysis for reporting fuel properties; may be on a dry (moisture free) basis, as "fired", or on an ash and moisture free basis. Fractions usually reported include: volatile matter, fixed carbon, moisture, ash, and heating value (higher he ...

A measure of light quality. The maximum CRI value of 100 is given to natural daylight and incandescent lighting. The closer a lamp's CRI rating is to 100, the better its ability to show true colors to the human eye.

Usually refers to ethanol to 160 to 200 proof.

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.)

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

A plot of a wind energy conversion device's power output versus wind speed.

The monochromatic irradiance of a surface per unit bandwidth at a particular wavelength, usually expressed in Watts per square meter-nanometer bandwidth.

Pounds/force per square inch absolute.