A sinusoidal quantity having a frequency that is an integral multiple of the frequency of a periodic quantity to which it is related.

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 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 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 thermal energy used in an industrial process.

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

A device for measuring power consumption.

The labels placed on appliances to enable consumers to compare appliance energy efficiency and energy consumption under specified test conditions as required by the Federal Trade Commission.

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

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

A construction material made by compressing earth in a form; used traditionally in many areas of the world and widely throughout North Africa and the Middle East.

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

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

The cost of producing one additional unit of a product.

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 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 amount of heat that a material can absorb and store.

The pressure equivalent of the velocity of a fluid.

A fluid used to absorb and transfer heat energy.

The load created by moisture in the air, including from outside air infiltration and that from indoor sources such as occupants, plants, cooking, showering, etc.