An insulation product composed of loose fibers or fiber pellets that are blown into building cavities or attics using special pneumatic equipment.

Describes the reliability of power plants. It refers to the number of hours that a power plant is available to produce power divided by the total hours in a set time period, usually a year.

A condition that results from an imbalance between the number of protons and the number of electrons in a substance.

Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.

A device that cuts off the flow of hot or cold air to or from a room as controlled by a thermostat.

A device that cools air by removing moisture from it.

A term used for the transparent or translucent material in a window. This material (i.e. glass, plastic films, coated glass) is used for admitting solar energy and light through windows.

A measure of the heating requirements of a building expressed in Btu per degree-day.

As defined by the Energy Security Act (PL 96-294) of 1980, "any organic matter which is available on a renewable basis, including agricultural crops and agricultural wastes and residues, wood and wood wastes and residues, animal wastes, municipal wastes, ...

Discharging a battery to 20 percent or less of its full charge capacity.

The maximum load that a motor is capable of supplying.

A popular term for "non-conventional" transportation fuels derived from natural gas (propane, compressed natural gas, methanol, etc.) or biomass materials (ethanol, methanol).

Water saturated or strongly impregnated with salt.

In reference to solar energy systems, the angle that a solar collector is positioned above horizontal.

A program of the U.S. Department of Energy (DOE) that implements energy legislation and presidential directives. FEMP provides project financing, technical guidance and assistance, coordination and reporting, and new initiatives for the federal government ...

A combustion heating appliance that vents the combustion by-products directly into the heated space. The latest models have oxygen-sensors that shut off the unit when the oxygen level in the room falls below a safe level.

The process or technologies for producing energy by harnessing the temperature differences (thermal gradients) between ocean surface waters and that of ocean depths. Warm surface water is pumped through an evaporator containing a working fluid in a closed ...

To disconnect a transmission and/or distribution line; a power line that is not carrying a current; to open a circuit.

Consist of three main layers. The top layer is near ambient and has low salt content. The bottom layer is hot, typically 160 F to 212 F (71 C to 100 C), and is very salty. The important gradient zone separates these zones. The gradient zone acts as a tran ...

Energy systems supply individual, or small-groups, of energy loads.