A type of solar thermal collector that has tubes (pipes) that the heat transfer fluid flows through that are connected to a flat absorber plate.

The prevailing or average weather conditions of a geographic region.

In reference to wind energy, for any given instant, the power available in the wind is proportional to the cube of the wind velocity; when wind speed doubles, the power availability increases eight times.

Energy derived from resources that are regenerative or for all practical purposes can not be depleted. Types of renewable energy resources include moving water (hydro, tidal and wave power), thermal gradients in ocean water, biomass, geothermal energy, so ...

The ratio of power produced by a wind energy conversion device to the power in a reference area of the free windstream.

A turbine that generates power from the combustion of a fuel.

An instrument for measuring relative humidity by means of wet and dry-bulb temperatures.

A heat exchanger that transfers heat contained in a liquid heat transfer fluid to another liquid.

The production of electrical current from light.

Major energy consuming sectors of the economy. The Commercial Sector includes commercial buildings and private companies. The Industrial Sector includes manufacturers and processors. The Residential Sector includes private homes. The Transportation Sector ...

The physical measure of the subjective sensation of brightness; measured in lumens.

A solar photovoltaic product that generally consists of groups of PV cells electrically connected together to produce a specified power output under standard test conditions, mounted on a substrate, sealed with an encapsulant, and covered with a protectiv ...

A type of power inverter that produce a high quality (nearly sinusoidal) voltage, at minimum current harmonics.

A term used to describe heat energy lost from a water heater tank.

To reduce or avoid the consumption of a resource or commodity.

An engine in which fuel is burned (or heat is applied) to the outside of a cylinder; a Stirling engine.

A hydrocarbon gas, C3H8, occurring in crude oil, natural gas, and refinery cracking gas. It is used as a fuel, a solvent, and a refrigerant. Propane liquefies under pressure and is the major component of liquefied petroleum (LPG).

A heat exchanger that transfers the heat contained in a liquid heat transfer fluid to air.

An air conditioning system that has two ducts, one is heated and the other is cooled, so that air of the correct temperature is provided by mixing varying amounts of air from each duct.

The storage of compressed air in a container for use to operate a prime mover for electricity generation.