A type of incandescent lamp with an interior coating of aluminum that reflects light to the front of the bulb. They are designed to spread light over specific areas.

The process of producing electricity by transforming other forms or sources of energy into electrical energy; measured in kilowatt-hours.

A measure of the average amount of a specified pollutant or material emitted for a specific type of fuel or process.

Material such as brick, rock, or stone.

A solar energy conversion device that has a bowl shaped dish covered with a highly reflective surface that tracks the sun and concentrates sunlight on a fixed absorber, thereby achieving high temperatures, for process heating or to operate a heat (Stirlin ...

The value of a personal portfolio, product, or investment after depreciation and interest on debt capital are subtracted from operating income. It can also be thought of as the equivalent worth of all cash flows relative to a base point called the present ...

A pole used to assist in raising a tower.

The products of all combustion processes formed by the combination of nitrogen and oxygen.

A lamp where the light beam is focused 2 inches ahead of the lamp reducing the amount of light trapped in the fixture.

Those privately or publicly owned establishments that generate, transmit, distribute, or sell electricity.

The amount (percent) of light that is reflected by a surface relative to the amount that strikes it.

The process of characterizing the wind resource, and its energy potential, for a specific site or geographical area.

A building energy auditing technique for locating areas of low insulation in a building envelope by means of a thermographic scanner.

The maximum value of natural solar insolation.

The ratio of the minimum amount of work or energy required to perform a task to the amount actually used.

The minimum temperature at which combustion of a solid or fluid can occur.

An electric current induced by radiant energy.

Solar collector thermal performance ratings based on collector efficiencies, usually expressed in Btu per hour for solar collectors under standard test or operating conditions for solar radiation intensity, inlet working fluid temperatures, and ambient te ...

Power generated by a utility unit that operates at a very low capacity factor; generally used to meet short-lived and variable high demand periods.

Thermosyphon systems use a separate storage tank located above the collector. Liquid warmed in the collector rises naturally above the collector, where it is kept until it is needed. The liquid can be either water or a glycol solution. If the fluid is wat ...