This device can automatically turn the heater off at night and on in the morning.

A construction material made by compressing earth in a form; used traditionally in many areas of the world and widely throughout North Africa and the Middle East.

A characteristic applied to domestic water heaters that is the amount of gallons raised 100 degrees Fahrenheit per hour (or minute) under a specified thermal efficiency.

The load created by moisture in the air, including from outside air infiltration and that from indoor sources such as occupants, plants, cooking, showering, etc.

To allow or augment the natural movement of cooler air from exterior, shaded areas of a building through or around a building.

A hydrogen production process that process uses algae. Under certain conditions, the pigments in certain types of algae absorb solar energy. An enzyme in the cell acts as a catalyst to split water molecules. Some of the bacteria produces hydrogen after th ...

As time increases from zero at the terminals of an inductor, the voltage comes to a particular value on the sine function curve ahead of the current. The voltage reaches its negative peak exactly 90 degrees before the current reaches its negative peak thu ...

Energy conversion technologies that harness the energy in tides, waves, and thermal gradients in the oceans.

The pressure equivalent of the velocity of a fluid.

The conversion of heat into electricity by the use of thermocouples.

The component of a central receiver solar thermal system where reflected solar energy is absorbed and converted to thermal energy.

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 ...

The process of moving existing loads to off-peak periods.

An electrical generator that runs at a constant speed and draws its excitation from a power source external or independent of the load or transmission network it is supplying.

A safety device consisting of a short length of relatively fine wire, mounted in a holder or contained in a cartridge and connected as part of an electrical circuit. If the circuit source current exceeds a predetermined value, the fuse wire melts (i.e. th ...

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 ...

The process of converting materials that are no longer useful as designed or intended into a new product.

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

The supportive structure of a building.

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