Caulking and weatherstripping to reduce air infiltration and exfiltration into/out of a building.

A method of depositing thin semiconductor films used to make certain types of solar photovoltaic devices. With this method, a substrate is exposed to one or more vaporized compounds, one or more of which contain desirable constituents. A chemical reaction ...

Air that is returned from a heated or cooled space, reconditioned and/or cleaned, and returned to the space.

Parasitic resistance to current flow in a cell due to mechanisms such as resistance from the bulk of the semiconductor material, metallic contacts, and interconnections.

A device used to remove particulate matter from the waste gasses of a combustion power plant.

An electromagnetic device that changes the voltage of alternating current electricity. It consists of an induction coil having a primary and secondary winding and a closed iron core.

This committee has jurisdiction on the oversight and legislative responsibilities for: coal, nuclear, and non-nuclear energy commercialization projects; DOE National Laboratories; global climate change; new technologies research and development; commercia ...

A chemical compound produced in a reaction between ethanol and isobutylene (a petroleum-derived by-product of the refining process). ETBE has characteristics superior to other ethers: low volatility, low water solubility, high octane value, and a large re ...

A horizontal axis wind turbine in which the rotor is downwind of the tower.

Electrical energy lost due to inherent inefficiencies in an electrical transmission and distribution system under specific conditions.

A device for converting the flow of a fluid (air, steam, water, or hot gases) into mechanical motion.

A window glass that has been coated with a reflective film and is useful in controlling solar heat gain during the summer.

The shape of the phase power at a certain frequency and amplitude.

A heat engine of the reciprocating (piston) where the working gas and a heat source are independent. The working gas is compressed in one region of the engine and transferred to another region where it is expanded. The expanded gas is then returned to the ...

An architectural design invented by Buckminster Fuller with a regular polygonal structure based on radial symmetry.

The inherent characteristic of a material to inhibit the transfer of energy. In electrical conductors, electrical resistance results in the generation of heat. Electrical resistance is measured in Ohms. The heat transfer resistance properties of insulatio ...

The power available from the rise and fall of ocean tides. A tidal power plant works on the principal of a dam or barrage that captures water in a basin at the peak of a tidal flow, then directs the water through a hydroelectric turbine as the tide ebbs.

A mechanism used by electric utilities to determine prices for electricity; typically defines rates according to amounts of power demanded/consumed during specific time periods.

This represents three layers of glazing in a window with an airspace between the middle glass and the exterior and interior panes.

A tank used in a closed-loop solar heating system that provides space for the expansion of the heat transfer fluid in the pressurized collector loop.