Transmit high-voltage electricity from the transformer to the electric distribution system.

A furnace grate that moves fuel through the combustion chamber

An architectural feature used to shade exterior walls; usually made of a lattice of metal or wood; often covered by vines to provide additional summertime shading.

A type of solar thermal collector in which a heat transfer fluid drips out of header pipe at the top of the collector, runs down the collector absorber and into a tray at the bottom where it drains to a storage tank.

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

A wall with high thermal mass used to store solar energy passively in a solar home. The wall absorbs solar energy and transfers it to the space behind the wall by means of radiation and by convection currents moving through spaces under, in front of, and ...

The actual power rating that is developed by a motor before losses occur.

The direction, at any point on the earth that is geographically in the northern hemisphere, facing toward the South Pole of the earth. Essentially a line extending from the point on the horizon to the highest point that the sun reaches on any day (solar n ...

A fluorescent lamp that has a tubular shape.

A type of solar thermal collector where the heat transfer fluid flows through tubes formed in the absorber plate.

A type of solar thermal collector that has tubes (pipes) that the heat transfer fluid flows through that are connected to a flat absorber plate.

A type of incandescent lamp that contains a halogen gas in the bulb, which reduces the filament evaporation rate increasing the lamp life. The high operating temperature and need for special fixtures limits their use to commercial applications and for use ...

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

The ratio of a boiler's or gasifier's maximum output to its minimum output.

A solar thermal system that has one tank for storing solar heated water to preheat the water in a conventional water heater.

A procedure for determining the primary elements in a substance (carbon, hydrogen, oxygen, nitrogen, sulfur, and ash).

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

A house built into the ground or slope of a hill, or which has most or all exterior surfaces covered with earth.

A solar thermal collector that has an absorber that does not have a glazed covering. Solar swimming pool heater systems usually use unglazed collectors because they circulate relatively large volumes of water through the collector and capture nearly 80 pe ...

An air conditioner consisting of one or more assemblies that move, clean, cool, and dehumidify air.