The path followed by electrons from a generation source, through an electrical system, and returning to the source.

The concept of capturing and converting the energy available in the motion of ocean waves to energy.

The process of breaking down organic material; reduction of the net energy level and change in physical and chemical composition of organic material.

This is an independent regulatory agency within the U.S. DOE that has jurisdiction over interstate electricity sales, wholesale electric rates, natural gas pricing, oil pipeline rates, and gas pipeline certification. It also licenses and inspects private, ...

The period of low energy demand, as opposed to maximum, or peak, demand.

The ratio of a photovoltaic cell's actual power to its power if both current and voltage were at their maxima. A key characteristic in evaluating cell performance.

A refined petroleum product suitable for use as a fuel in internal combustion engines.

A type of heating system where heat, resulting when electric current flows through an "element" or conductor, such as Nichrome, which has a high resistance, is radiated to a room.

The space within a building or structure that is normally occupied by people, and that may be conditioned (heated, cooled and/or ventilated).

A unit or measure of electricity supply or consumption of 1,000 Watts over the period of one hour; equivalent to 3,412 Btu.

Any coefficient used to calculate heat transmission by conduction, convection, or radiation through materials or structures.

Alternating current in which three separate pulses are present, identical in frequency and voltage, but separated 120 degrees in phase.

A measure of the amount of light incident on a surface; measured in foot-candles or Lux.

All the components of the appliance used to condition interior air of a building.

The processes that a work input/output system undergoes and in which the initial and final states are identical.

Energy supplied during periods of relatively high system demands as specified by the supplier.

The force that pulls a wind turbine blade, as opposed to drag.

The ability of a building construction assembly (partition, wall, floor, etc.) to resist the passage of fire. The rating is expressed in hours.

The energy developed through the use of heat energy.

The flow of heat from one area to another by conduction, convection, and/or radiation. Heat flows naturally from a warmer to a cooler material or space.