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

The potentially useful byproducts of ethanol fermentation process.

Those gases, such as water vapor, carbon dioxide, tropospheric ozone, methane, and low level ozone that are transparent to solar radiation, but opaque to long wave radiation, and which contribute to the greenhouse effect.

A popular term for energy produced from renewable energy resources.

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.)

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

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

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

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.

Materials with high thermal energy storage capacity contained in or part of a building's walls, floors, or freestanding elements.

A type of high intensity discharge light that has the most lumens per watt of any light source.

The quantity of heat that a cooling appliance is capable of removing from a room in one hour.

Salt mixtures with potential applications as solar thermal energy storage materials.

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.

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

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 type of insulation that is molded or expanded to produce coarse, closed cells containing air. The rigid cellular structure provides thermal and acoustical insulation, strength with low weight, and coverage with few heat loss paths. Often used to insulat ...

The weight of water vapor, per unit weight of dry air.

The air that is supplied to the combustion chamber of a furnace.

The amount of energy produced as a percentage of the amount of energy consumed.