The net south-facing glazing area projected on a vertical plane. Also, the solid area covered at any instant by a wind turbine's blades from the perspective of the direction of the windstream (as opposed to the swept area).

The transfer of heat by means of air currents.

Pounds of pressure per square inch.

A solar photovoltaic device with a specified area.

A curve on a chart showing power (kW) supplied (on the horizontal axis) plotted against time of occurrence (on the vertical axis) to illustrate the variance in a load in a specified time period.

The ratio of average energy demand (load) to maximum demand (peak load) during a specific period.

A turbine that has a runner with attached blades similar to a propeller used to drive a ship. As water passes over the curved propeller blades, it causes rotation of the shaft.

The period marked by successive crossing of the earth's meridian by the sun; the hour angle of the sun at a point of observance (apparent time) is corrected to true (solar) time by taking into account the variation in the earth's orbit and rate of rotatio ...

The tendency of the sunlight to electricity conversion efficiency of amorphous silicon photovoltaic devices to degrade (drop) upon initial exposure to light.

A heat exchanger in which two fluids flow in opposite directions for transfer heat energy from one to the other.

A unit that equals 20 long hundredweight or 2,240 pounds. Used mainly in England.

Restrictions on the use of a property.

A source of power (electricity) that can displace power from another source so that source's power can be transmitted to more distant loads.

This committee has oversight over the generation and marketing of electric power from federal water projects by federally charted or Federal RPM authorities, measures and matters concerning water resources planning, compacts relating to use and apportionm ...

A widely used rate of return for performing economic analysis. This method solves for the interest rate that equates the equivalent worth of an alternative's cash receipts or savings to the equivalent worth of cash expenditures, including investments. The ...

A popular term for energy produced from renewable energy resources.

A generator with a single armature coil, which may have many turns and the alternating current output consists of a succession of cycles.

Salt mixtures with potential applications as solar thermal energy storage materials.

The process of controlling indoor moisture levels and condensation.

The two times of the year when the sun is apparently farthest north and south of the earth's equator; usually occurring on or around June 21 (summer solstice in northern hemisphere, winter solstice for southern hemisphere) and December 21 (winter solstice ...