A machine for converting mechanical energy into electrical energy by magneto-electric induction; may be used as a motor.

The change in the power available in the wind due to changes in the windspeed or velocity profile; the windpower profile is proportional to the cube of the wind speed profile.

The process of implementing measures to reduce peak power demands on a system.

The ratio of a boiler's or gasifier's maximum output to its minimum output.

A measure of the percent of moisture actually in the air compared with what would be in it if it were fully saturated at that temperature. When the air is fully saturated, its relative humidity is 100 percent.

A device used to transfer heat from a fluid (liquid or gas) to another fluid where the two fluids are physically separated.

A unit of electricity consumption of one Watt over the period of one hour.

The average power output of a wind energy conversion system at a given mean wind speed based on a Raleigh frequency distribution.

The angle at which a solar collector or module is set to face the sun relative to a horizontal position. The tilt angle can be set or adjusted to maximize seasonal or annual energy collection.

The loss of heat as the water circulates through a water heater tank and inlet and outlet pipes.

A popular term used to describe the increase in average global temperatures due to the greenhouse effect.

An electrical device for converting alternating current to direct current. The chamber in a cooling device where water is separated from the working fluid (for example ammonia).

A device for measuring power consumption.

The amount of kinetic energy gained by an electron when accelerated through an electric potential difference of 1 Volt; equivalent to 1.603 x 10

The fine liquid or solid particles contained in combustion gases. The quantity and size of particulates emitted by cars, power and industrial plants, wood stoves, etc are regulated by the U.S. Environmental Protection Agency.

The maximum energy demand or load in a specified time period.

As a component of a heating or cooling appliance, rows of tubing or pipe with fins attached through which a heat transfer fluid is circulated and to deliver heat or cooling energy to a building.

A device that can be set to automatically turn appliances (lights) off and on at set times.

A term applied to warm-air heating systems that deliver heated air to rooms by means of registers or baseboards located along exterior walls.

The process of changing from one physical state (solid, liquid, or gas) to another, with a necessary or coincidental input or release of energy.