The amount of heat that a material can absorb and store.

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 ...

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

One thousand kilowatt-hours or 1 million watt-hours.

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

The maximum value of natural solar insolation.

The addition of dopants to a semiconductor.

The generation of an electric current, when two conductors of different metals are joined at their ends to form a circuit, with the two junctions kept at different temperatures.

A device that produces mechanical energy directly from two heat reservoirs of different temperatures. A machine that converts thermal energy to mechanical energy, such as a steam engine or turbine.

A solar energy concentrating technology that uses a linear receiver that tracks the focal area of a reflector or array of reflectors.

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 ...

The process of using heat that is rejected in one part of a cycle for another function or in another part of the cycle.

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

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

Classifications of fires developed by the National Fire Protection Association.

The amount of time required for positive cash flows to equal the total investment costs.

The ability to send or wheel electric power to a customer over a transmission and distribution system that is not owned by the generator (seller) of the power.

An aluminum foil fabricated insulator with backings applied to provide a series of closed air spaces with highly reflective surfaces.

Material such as brick, rock, or stone.

The amount that the voltage, current, and/or power output of a solar cell changes due to a change in the cell temperature.