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A device for conditioning air in an interior space. A Room Air Conditioner is a unit designed for installation in the wall or window of a room to deliver conditioned air without ducts. A Unitary Air Conditioner is composed of one or more assemblies that u ...

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Any number of solar photovoltaic modules or solar thermal collectors or reflectors connected together to provide electrical or thermal energy.

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The load that a power generation unit or other electrical apparatus or heating unit is rated by the manufacture to be able to meet or supply.

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Fans in which the direction of the flow of the air from inlet to outlet remains unchanged; includes propeller, tubaxail, and vaneaxial type fans.

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The device in an air conditioner that distributes the filtered air from the return duct over the cooling coil/heat exchanger. This circulated air is cooled/heated and then sent through the supply duct, past dampers, and through supply diffusers to the liv ...

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An air infiltration measurement technique developed by the Brookhaven National Laboratory to measure changes over time (one week to five months) when determining a building's air infiltration rate. This test cannot locate exact points of infiltration, but ...

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An electrical device that adjusts the leading current of an applied alternating current to balance the lag of the circuit to provide a high power factor.

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A solar day; an interval between successive transits of the sun's center across an observer's meridian; the time thus measured is not equal to clock time.

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The incremental cost to an electric power producer to generate or purchase a unit of electricity or capacity or both.

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The action of light on a biological system that results in the dissociation of a substrate, usually water, to produce hydrogen.

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A passive or mechanical device used to ventilate an attic space, primarily to reduce heat buildup and moisture condensation.

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The water that is forced into a boiler to take the place of that which is evaporated in the generation of steam.

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The minimum demand experienced by a power plant.

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A measure of the electrical charge of a capacitor consisting of two plates separated by an insulating material.

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A device for converting one form of energy or fuel into useful energy or work.

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Abbreviation for the American Society of Heating, Refrigeration, and Air-Conditioning Engineers.

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A type of radiant heating system where the radiator is located along an exterior wall where the wall meets the floor.

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A heat exchanger element enclosed in a boiler. Water is circulated with a pump through the jacket where it picks up heat from the combustion chamber after which the heated water circulates to heat distribution devices. A water jacket is also an enclosed w ...

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The pressure of the air at sea level; one standard atmosphere at zero degrees centigrade is equal to 14.695 pounds per square inch (1.033 kilograms per square centimeter).

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The difference between net electrical system capability and system maximum load requirements (peak load); the margin of capability available to provide for scheduled maintenance, emergency outages, system operating requirements and unforeseen loads.

Category:Energy Terms