The ratio of the coincident, maximum demand or two or more loads to the sum of their noncoincident maximum demand for a given period; the reciprocal of the diversity factor, and is always less than or equal to one.

To condition/cool air by dessication.

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 ...

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 free and mobile conduction electron or hole in a semiconductor.

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

The ratio of solar radiation captured and transfered to the collector (heat transfer) fluid.

This is another name for an induction motor. The motors consist of a rotor inside a stator. The rotor has laminated, thin flat steel discs, stacked with channels along the length. If the casting composed of bars and attached end rings were viewed without ...

An estimate of power demand at some future period.

The physical measure of the subjective sensation of brightness; measured in lumens.

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

A condition that can occur in a solar collector if the working fluid does not circulate when sun is shining on the collector.

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

The inner coil in a heat pump that, during the cooling mode, absorbs heat from the inside air and boils the liquid refrigerant to a vapor, which cools the house.

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 large power plant that generates power for distribution to multiple customers.

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.

The trapping of light by refraction and reflection at critical angles inside a semiconductor device so that it cannot escape the device and must be eventually absorbed by the semiconductor.

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

The production of hydrogen using a photoelectrochemical cell.