A renewable energy system that includes two different types of renewable energy technologies that produce the same type of energy; for e.g., a wind turbine and a solar photovoltaic array combined to meet a power demand.

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 process of controlling indoor moisture levels and condensation.

The potentially useful byproducts of ethanol fermentation process.

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

see Peak Watt.

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

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

The time of the day, at a specific location, when the sun reaches its highest, apparent point in the sky; equal to true or due, geographic south.

A tax credit granted for specific types of investments.

The value or purchasing power of a dollar in a specified year carried forward or backward.

The process by which sunlight directly enters a building through the windows and is absorbed and stored in massive floors or walls.

A method of financial and economic analysis used to determine present and future values of investments or expenses.

The ratio of the sum of the noncoincidental maximum demands of two or more loads to their coincidental maximum demands for the same period.

The power required to energize the magnetic field of a generator.

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

Freshly cut, unseasoned, wood.

The region between an n-layer and a p-layer in a single material, photovoltaic cell.

The lower or net heat of combustion for a fuel that assumes that all products of combustion are in a gaseous state. (See Net Heating Value below.)

The space between a hanging ceiling and the floor above or roof; usually contains HVAC ducts, electrical wiring, fire suppression system piping, etc.