The flow rate in these systems is 1/8 to 1/5 the rate of most solar water heating systems. The low-flow systems take advantage of stratification in the storage tank and theoretically allows for the use of smaller diameter piping to and from the collector ...

The amount of money required to secure a specified cash flow at a future date at a specified return.

A term for the process of transmitting electricity over transmission lines not owned by the supplier of the electricity to a retail customer of the supplier. With retail wheeling, an electricity consumer can secure their own supply of electricity from a b ...

Recombination occurring in the emitter region of a photovoltaic cell.

A type of furnace in which fuel is spread, automatically or mechanically, across the furnace grate.

One horsepower provided over one hour; equal to 0.745 kilowatt-hour or 2,545 Btu.

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

When the temperature of the hydrothermal liquids is over 350 F (177 C), flash-steam technology is generally employed. In these systems, most of the liquid is flashed to steam. The steam is separated from the remaining liquid and used to drive a turbine ge ...

Categories of energy consumers, as defined by consumption or demand levels, patterns, and conditions, and generally included residential, commercial, industrial, agricultural.

The power required to energize the magnetic field of a generator.

Pounds of pressure per square inch.

The demand of a consumer of electricity at the time of a power supplier's peak system demand.

A device in which organic material is biochemically decomposed (digested) by anaerobic bacteria to treat the material and/or to produce biogas.

A power plant that produces electricity by the force of water falling through a hydro turbine that spins a generator.

A type of solar photovoltaic device made in a continuous process of pulling material from a molten bath of photovoltaic material, such as silicon, to form a thin sheet of material.

Any wholly or partially enclosed space in which combustion takes place.

The potentially useful byproducts of ethanol fermentation process.

The process by which sunlight directly enters a building through the windows and is absorbed and stored in massive floors or walls.

A pre-cut layer of insulation applied around a water heater storage tank to reduce standby heat loss from the tank.

A type of heating system that provides heat from the resistance of an electrical current flowing through a conductor.