The first law states that energy can not be created or destroyed; the second law states that when a free exchange of heat occurs between two materials, the heat always moves from the warmer to the cooler material.

The visible portion of the electromagnetic spectrum with wavelengths from 0.4 to 0.76 microns

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

The process in which a solid fuel is converted into a gas; also known as pyrolitic distillation or pyrolysis. Production of a clean fuel gas makes a wide variety of power options available.

A thin sheet of material (metal) of a heat exchanger that conducts heat to a fluid.

The physically connected generation, transmission, and distribution facilities and components operated as a unit.

These brines are hot (300 F to 400 F) (149 C to 204 C) pressurized waters that contain dissolved methane and lie at depths of 10,000 ft (3048 m) to more than 20,000 ft (6096 m) below the earth's surface. The best known geopressured reservoirs lie along th ...

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.

A material used to seal gaps around windows and exterior doors.

In a wind energy conversion system, to pitch the turbine blades so as to reduce their lift capacity as a method of shutting down the turbine during high wind speeds.

An incorporated right, liberty, privilege, or use of another entity's property, distinct from ownership, without profit or compensation; a right-of-way.

The natural, convective movement of air or water due to differences in temperature. In solar passive design a thermosyphon collector can be constructed and attached to a house to deliver heat to the home by the continuous pattern of the convective loop (o ...

The maximum load that a device is capable of carrying.

The storage of heat energy during utility off-peak times at night, for use during the next day without incurring daytime peak electric rates.

A profile of how the wind speed changes with height above the surface of the ground or water.

The point or outdoor temperature where the heating capacity of a heat pump matches the heating requirements of a building.

A heat storage system that uses a heat storage medium, and where the additional or removal of heat results in a change in temperature.

Under the First Law of Thermodynamics, efficiency is the ratio of work or energy output to work or energy input, and cannot exceed 100 percent. Efficiency under the Second Law of Thermodynamics is determined by the ratio of the theoretical minimum energy ...

A substance(s) or pollutant emitted as a result of a process.

A type of lamp having a lens of heavy durable glass that focuses the light. They have longer lifetimes with less lumen depreciation than standard incandescents.