A power source/generator that operates independently of or is not connected to an electric transmission and distribution network; used to meet a load(s) physically close to the generator.

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 cost of producing one additional unit of a product.

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

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).

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.

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

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

A device for measuring power consumption.

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.

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 heat exchanger in which heat is recovered from the products of combustion.

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

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

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

A solar absorber surface that has high absorbtance at wavelengths corresponding to that of the solar spectrum and low emittance in the infrared range.