The force that pulls a wind turbine blade, as opposed to drag.

The process of managing the consumption of energy, generally to optimize available and planned generation resources.

A statement of the electric rate(s), terms, and conditions for electricity sale or supply.

A type of motor designed to operate precisely at the synchronous speed with no slip in the full-load speeds (rpm).

States that energy cannot be created or destroyed, but only changed from one form to another. First Law efficiency measures the fraction of energy supplied to a device or process that it delivers in its output. Also called the law of conservation of energ ...

The energy developed through the use of heat energy.

A form of thermal energy resulting from combustion, chemical reaction, friction, or movement of electricity. As a thermodynamic condition, heat, at a constant pressure, is equal to internal or intrinsic energy plus pressure times volume.

A type of heat pump that uses the ground, ground water, or ponds as a heat source and heat sink, rather than outside air. Ground or water temperatures are more constant and are warmer in winter and cooler in summer than air temperatures. Geothermal heat p ...

A device that captures the heat from the exhaust air from a building and transfers it to the supply/fresh fresh air entering the building to preheat the air and increase overall heating efficiency.

A device that releases pressure within a radiator when the pressure inside exceeds the operating limits of the vent.

The ratio of the radiant energy (heat) leaving (being emitted by) a surface to that of a black body at the same temperature and with the same area; expressed as a number between 0 and 1.

The standard method for calculating residential cooling loads developed by the Air-Conditioning and Refrigeration Institute (ARI) and the Air Conditioning Contractors of America (ACCA) based largely on the American Society of Heating, Refrigeration, and A ...

The wheeling of electric power in amounts and at prices that generally have been negotiated in longterm contracts between the generator and a distributor or very large consumer of power.

The amount of solar radiation striking a surface per unit of time and area.

The amount of useful energy produced by a system less the amount of energy required to produce the fuel.

The absolute centimeter-gram-second unit of force; that force that will impart to a free mass of one gram an acceleration of one centimeter per second per second.

A measure of the efficiency of an appliance's energy efficiency.

The structural elements (walls, roof, floor, foundation) of a building that encloses conditioned space; the building shell.

The total diffuse and direct insolation on a horizontal surface, averaged over a specified period of time.

A building design that uses structural elements of a building to heat and cool a building, without the use of mechanical equipment, which requires careful consideration of the local climate and solar energy resource, building orientation, and landscape fe ...