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.

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

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.

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

These fluids can be either water or steam trapped in fractured or porous rocks; they are found from several hundred feet to several miles below the Earth's surface. The temperatures vary from about 90 F to 680 F (32 C to 360 C) but roughly 2/3 range in te ...

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 ...

Power generation equipment or system capacity to meet peak power demands.

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

A ratio of the work or useful energy output of a system versus the amount of work or energy inputted into the system as determined by using the same energy equivalents for energy in and out. Is used as a measure of the steady state performance or energy e ...

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 conversion of heat into electricity by the use of thermocouples.

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.

The supportive structure of a building.

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.

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 ...

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

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.

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

The pressure equivalent of the velocity of a fluid.