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 ...

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

The prevailing or average weather conditions of a geographic region.

The abrupt and large increase in electrical conductivity exhibited by some metals as the temperature approaches absolute zero.

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.

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.

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 ...

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 heat contained in a liquid heat transfer fluid to another liquid.

The production of electrical current from light.

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

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

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

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

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.

Turbines in which the axis of the rotor's rotation is parallel to the wind stream and the ground.

A computer software program that simulates energy consumption of commercial buildings; used for design and auditing purposes.

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