Sensible and latent heat contained in combustion gases and vapor emitted to the atmosphere.

An electrical installation containing power conversion (and sometimes generation) equipment, such as transformers, compensators, and circuit breakers.

A type of heating system in which the heat transfer fluid circulates from the heating component to a heat exchanger that is immersed in a heat storage media, passing its heat to the storage media without physically contacting it.

The component of a central air conditioner that is designed to remove heat absorbed by the refrigerant and transfer it outside the conditioned space.

The device in an air conditioner or heat pump through which the refrigerant is circulated and releases heat to the surroundings when a fan blows outside air over the coils. This will return the hot vapor that entered the coil into a hot liquid upon exitin ...

The flow of electrical energy (electricity) in a conductor, measured in amperes.

The average time a minority carrier exists before recombination.

The ratio of the electric power produced by a photovoltaic device to the power of the sunlight incident on the device.

The abrupt and large increase in electrical conductivity exhibited by some metals as the temperature approaches absolute zero.

An engine in which fuel is burned (or heat is applied) to the outside of a cylinder; a Stirling engine.

A device used to maintain a specified humidity in a conditioned space.

A value that describes the ability of a material to conduct heat. The number of Btu that flow through 1 square foot of material, in one hour. It is the reciprocal of the R-Value (U-Value = 1/R-Value).

A type of photovoltaic device in which the electricity induced in the cell is used immediately within the cell to produce a chemical, such as hydrogen, which can then be withdrawn for use.

A solar collector that uses reflective surfaces to concentrate sunlight onto a small area, where it is absorbed and converted to heat or, in the case of solar photovoltaic (PV) devices, into electricity. Concentrators can increase the power flux of sunlig ...

An electrochemical device that converts chemical energy directly into electricity.

To reduce or avoid the consumption of a resource or commodity.

Major energy consuming sectors of the economy. The Commercial Sector includes commercial buildings and private companies. The Industrial Sector includes manufacturers and processors. The Residential Sector includes private homes. The Transportation Sector ...

In reference to wind energy, for any given instant, the power available in the wind is proportional to the cube of the wind velocity; when wind speed doubles, the power availability increases eight times.

Large, flat boxes with glass covers and dark-colored metal plates inside that absorb and transfer solar energy to a heat transfer fluid.

A hydrocarbon gas, C3H8, occurring in crude oil, natural gas, and refinery cracking gas. It is used as a fuel, a solvent, and a refrigerant. Propane liquefies under pressure and is the major component of liquefied petroleum (LPG).