Houses that have earth berms around exterior walls.

A holding pond for livestock manure that is designed to anaerobically stabilize manure, and may be designed to capture biogas, with the use of an impermeable, floating cover.

To heat a gaseous mixture to the temperature at which combustion takes place.

A type of wind turbine in which the axis of rotation is perpendicular to the wind stream and the ground.

The unit of magnetic field intensity equal to 1 dyne per unit pole.

The unit of illuminance equivalent to 1lumen per square meter.

Turbines in which the rotor speed increases and decreases with changing wind speed, producing electricity with a variable frequency.

A device that measures the intensity of direct beam solar radiation.

The wind speed and direction in an undisturbed flow.

A group of organic compounds composed of carbon, hydrogen, and oxygen; a series of molecules composed of a hydrocarbon plus a hydroxyl group; includes methanol, ethanol, isopropyl alcohol and others.

A compound used to make certain types of solar photovoltaic cells.

A light source composed of a metal base, a glass tube filled with an inert gas or a vapor, and base pins to attach to a fixture.

Any light source designed specifically to direct light a task or work performed by a person or machine.

The production of an electric current in a conductor by the variation of a magnetic field in its vicinity.

A heat absorbing reaction or a reaction that requires heat.

A type of (geothermal) heat pump that uses well (ground) or surface water as a heat source. Water has a more stable seasonal temperature than air thus making for a more efficient heat source.

The housing around a motor that supports the active parts and protects them. They come in different varieties (open, protected) depending on the degree of protection required.

A drag-type wind machine that can react to wind from any direction.

A means to increase the thermal efficiency of a steam electric generating system by converting some waste heat from the condenser into electricity. The heat engine in a bottoming cycle would be a condensing turbine similar in principle to a steam turbine ...

A large number of thermocouples connected in series.