The nominal voltage for which a conductor or electrical appliance is designed; the reference voltage for identification and not necessarily the precise voltage at which it operates.

A type of hydroelectric facility that uses the river flow with very little alteration and little or no impoundment of the water.

A class of energy producer that produces both heat and electricity from a single fuel.

A hydropower facility that stores water in a reservoir during high-inflow periods to augment water during low-inflow periods. Storage projects allow the flow releases and power production to be more flexible and dependable. Many hydropower project operati ...

A device used to maintain a specified humidity in a conditioned space.

The measure of closeness in shape between a waveform and it's fundamental component.

The flow of electrical energy (electricity) in a conductor, measured in amperes.

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

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.

The component of a central air conditioner that is designed to remove heat absorbed by the refrigerant and transfer it outside the conditioned space.

In a solar photovoltaic device, an n-type dopant, such as phosphorus, that puts an additional electron into an energy level very near the conduction band; this electron is easily exited into the conduction band where it increases the electrical conductivi ...

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.

An exterior door that protects the primary door.

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 measure of the probability that a system demand will exceed capacity during a given period; often expressed as the estimated number of days over a long period, frequently 10 years or the life of the system.

The total amount of electricity produced by a power plant.

The amount of energy an energy storage device or system can store.

A unit of mass equal to 1,000 kilograms or 2,204.6 pounds.

In refrigeration, an evaporating temperature of 5 degrees Fahrenheit (F), a condensing temperature of 86 degrees F., liquid temperature before expansion of 77 degrees F., and suction temperature of 12 degrees F.