The apparent angle of the sun north or south of the eath's equatorial plane. The earth's rotation on its axis causes a daily change in the declination.

Restrictions on the use of a property.

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

An axail flow fan mounted in a section of duct to move conditioned air.

A unit of illuminance; equal to one lumen per square foot.

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

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

Pounds of pressure per square inch.

The process of storing, or converting energy from one form to another, for later use; storage devices and systems include batteries, conventional and pumped storage hydroelectric, flywheels, compressed gas, and thermal mass.

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.

A popular term for energy produced from renewable energy resources.

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 ...

The process of controlling indoor moisture levels and condensation.

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).

A solar photovoltaic device with a specified area.

The value or purchasing power of a dollar in a specified year carried forward or backward.

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

A solar heating system that uses a liquid as the heat transfer fluid.

The space between a hanging ceiling and the floor above or roof; usually contains HVAC ducts, electrical wiring, fire suppression system piping, etc.