The process by which water in air changes from a vapor to a liquid due to a change in temperature or pressure; occurs when water vapor reaches its dew point (condensation point); also used to express the existence of liquid water on a surface.

A furnace grate that moves fuel through the combustion chamber

The duct(s) of a forced air heating/cooling system through which heated or cooled air is supplied to rooms by the action of the fan of the central heating or cooling unit.

Period of time a system or appliance (or component of) is expected to function at its nominal or design capacity without major repair.

A type of solar thermal collector where the heat transfer fluid flows through tubes formed in the absorber plate.

Conventional turbine generators are used with the dry steam resources. The steam is used directly, eliminating the need for boilers and boiler fuel that characterizes other steam-power-generating technologies. This technology is limited because dry-steam ...

A federal government agency created in 1977, that is entrusted to contribute to the welfare of the United States by providing technical information, and a scientific and educational foundation for technology, policy and institutional leadership to achieve ...

A measure of the relative flame spread, and smoke development, from a material being tested. The flame spread rating is a single number comparing the flame spread of a material with red oak, arbitrarily given the number 100 and asbestos cement board with ...

The actual power rating that is developed by a motor before losses occur.

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 turning or twisting force generated by an electrical motor in order for it to operate.

The environmental, social, and economic impacts of producing a good or service that are not directly reflected in the market price of the good or service.

To condition/cool air by dessication.

The production of energy by a system or appliance at a level less than its design or nominal capacity.

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

An estimate of power demand at some future period.

To send electricity through a electricity transmission and distribution network; a conductor or power line that is carrying current.

An optical device for concentrating light that is made of concentric rings that are faced at different angles so that light falling on any ring is focused to the same point.

A means to increase the thermal efficiency of a steam electric generating system by increasing temperatures and interposing a device, such as a gas turbine, between the heat source and the conventional steam-turbine generator to convert some of the additi ...