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 ...

The damping of interior temperature fluctuations by massive construction.

A value used to estimate interior air cooling requirements (load) calculated as the number of degrees per day (over a specified period) that the daily average temperature is above 65 degrees Fahrenheit (or some other, specified base temperature). The dail ...

Usually refers to ethanol to 160 to 200 proof.

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

A deposition process whereby heat is used to break molecules into elemental sources that are then spray deposited on a substrate.

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

The amount of heat required to raise a unit mass of a substance through one degree, expressed as a ratio of the amount of heat required to raise an equal mass of water through the same range.

A type of water heater in which heated water is stored within the tank. Hot water is released from the top of the tank when a hot water faucet is turned. This water is replaced with cold water that flows into the tank and down to just above the bottom pla ...

A window located on the roof of a structure to provide interior building spaces with natural daylight, warmth, and ventilation.

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

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

A chemical element, of atomic number 14, that is semi-metallic, and an excellent semiconductor material used in solar photovoltaic devices; commonly found in sand.

A steady-state fermentation process.

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

The difference between the brightness of an object compared to that of its immediate background.

Energy that is capable or available for doing work; the time rate at which work is performed, measured in horsepower, Watts, or Btu per hour. Electric power is the product of electric current and electromotive force.

One layer of glass in a window frame. It has very little insulating value (R-1) and provides only a thin barrier to the outside and can account for considerable heat loss and gain.

The percentage of a building's seasonal energy requirements that can be met by a solar energy device(s) or system(s).

A unit for the quantity of electricity transported in 1 second by a current of 1 ampere.