To exceed the design capacity of a device.

A passive solar heating system in which the sun warms a heat storage element, and the heat is distributed to the interior space by convection, conduction, and radiation.

A heat exchanger for recovering heat from flue gases for heating water or air.

A registered trademark of an agency of the state of Nebraska, for an automotive fuel containing a blend of 10 percent ethanol and 90 percent gasoline.

A heating system where heat is supplied (radiated) into a room by means of heated surfaces, such as electric resistance elements, hot water (hydronic) radiators, etc.

A wall to prevent the spread of fire; usually made of non-combustible material.

A generic term for an electrical conductor.

A measure of the efficiency of an appliance's energy efficiency.

An idealized process in which a working fluid (water, air, ammonia, etc) successively changes its state (from a liquid to a gas and back to a liquid) for the purpose of producing useful work or energy, or transferring energy.

A WECS designed to produce electricity.

A motor in which a three phase (or any multiphase) alternating current (i.e. the working current) is supplied to iron-cored coils (or windings) within the stator. As a result, a rotating magnetic field is set up, which induces a magnetizing current in the ...

A device where sunlight concentrated onto a absorber heats it to a high temperature, and the thermal radiation emitted by the absorber is used as the energy source for a photovoltaic cell that is designed to maximize conversion efficiency at the wavelengt ...

Any gaseous, liquid, or solid fuel used for indoor space heating.

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

Equal to gross generation less electricity consumption of a power plant.

This compound of nitrogen and oxygen is formed by the oxidation of nitric oxide (NO) which is produced by the combustion of solid fuels.

A solar energy conversion device that uses a trough covered with a highly reflective surface to focus sunlight onto a linear absorber containing a working fluid that can be used for medium temperature space or process heat or to operate a steam turbine fo ...

A space heating device that burns pellets; are more efficient, clean burning, and easier to operate relative to conventional cord wood burning appliances.

The process of the absorption of heat from one location and its transfer to another for rejection or recuperation.

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