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 transfer of heat by means of air currents.

Restrictions on the use of a property.

An amount paid by a customer for being connected to an electricity supplier's transmission and distribution system.

A plan developed by an electric utility, sometimes as required by a public regulatory commission or agency, that defines the short and long term capacity additions (supply side) and demand side management programs that it will undertake to meet projected ...

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

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 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.

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

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

A solar photovoltaic device with a specified area.

A measure of the quality of a light source by expressing the color appearance correlated with a black body.

A popular term for energy produced from renewable energy resources.

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

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

Pounds/force per square inch absolute.

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.

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

To price and sell greenpower/electricity higher than that produced from fossil or nuclear power plants, supposedly because some buyers are willing to pay a premium for greenpower.

That portion of an electricity supply system used to deliver electricity from points on the transmission system to consumers.