A device built into or installed above a combustion appliance to assure the escape of combustion byproducts, to prevent backdrafting of the appliance, or to neutralize the effects of the stack action of the chimney or vent on the operation of the applianc ...

A container that holds rock used as the thermal mass to store solar energy in a solar heating system.

A byproduct of low-temperature carbonization of a solid fuel.

In reference to a wind turbine, a condition when the rotor stops turning.

A type of hydropower turbine that contains a runner that has water passages through it formed by curved vanes or blades. As the water passes through the runner and over the curved surfaces, it causes rotation of the runner. The rotational motion is transm ...

A masonry or metal stack that creates a draft to bring air to a fire and to carry the gaseous byproducts of combustion safely away.

A device used to protect the user of any electrical system or appliance from shock.

The difference in electrical pressure (voltage) between any two points in an electrical system or between any point in an electrical system and the earth.

A comprehensive legislative package that mandates and encourages energy efficiency standards, alternative fuel use, and the development of renewable energy technologies. Public Law 102-486, October 24th, 1992. Also authorized the Federal Energy Regulatory ...

The process of sending or moving electricity from one point to another; usually defines that part of an electric utility's electric power lines from the power plant buss to the last transformer before the customer's connection.

A lamp that consists of a sealed arc tube inside a glass envelope, or outer jacket. The inner arc tube is filled with elements that emit light when ionized by electric current. A ballast is required to provide the proper starting voltage and to regulate c ...

A unit of work done by the force of one dyne acting through a distance of one centimeter.

The process of degrading organic material (biomass) by microorganisms in aerobic conditions.

The production of hydrogen using a photoelectrochemical cell.

When the temperature of the hydrothermal liquids is over 350 F (177 C), flash-steam technology is generally employed. In these systems, most of the liquid is flashed to steam. The steam is separated from the remaining liquid and used to drive a turbine ge ...

The use of two or more different fuels (e.g. wood and coal) simultaneously in the same combustion chamber of a power plant.

The U.S. Government's 12-month financial year, from October to September, of the following calender year; e.g.: FY 1998 extends from Oct. 1, 1997 to Sept. 30, 1988.

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

The force per unit area acting on the surface of a solid boundary parallel to the flow.

The low effective temperature of the sky on a clear night.