A gasifier in which the feedstock (fuel) is suspended by the movement of gas to move it through the gasifier.

Nonglossy paint with a relatively high absorptance.

The vacancy where an electron would normally exist in a solid; behaves like a positively charged particle.

A stationary or rotating vent used to ventilate attics or cathedral ceilings; usually made of galvanized steel, or polypropylene.

A curve that displays load values on the horizontal axis in descending order of magnitude against the percent of time (on the vertical axis) that the load values are exceeded.

A vehicle with an engine capable of operating on two different types of fuels.

A passage for surplus water to flow over or around a dam.

A type of combustion heating system in which combustion air is drawn directly from outside and the products of combustion are vented directly outside. These features are beneficial in tight, energy-efficient homes because they will not depressurize a home ...

A term used to describe a technologically advanced window system that contains glazing that can change or switch its optical qualities when a low voltage electrical signal is applied to it, or in response to changes in heat or light.

Legal documents that regulate construction to protect the health, safety, and welfare of people. Codes establish minimum standards but do not guarantee efficiency or quality.

The angle that a solar collector is positioned from horizontal.

The number of revolutions that the motor turns in a given time period (i.e. revolutions per minute, rpm).

A method of controlling a wind turbine's speed by varying the orientation, or pitch, of the blades, and thereby altering its aerodynamics and efficiency.

A chemical element (impurity) added in small amounts to an otherwise pure semiconductor material to modify the electrical properties of the material. An n-dopant introduces more electrons. A p-dopant creates electron vacancies (holes).

Turning off or disconnecting loads to limit peak demand.

Fabricated as a single structure.

An insulation product made of a fibrous material or plastic foams, pressed or extruded into board-like forms. It provides thermal and acoustical insulation strength with low weight, and coverage with few heat loss paths.

That part of an electricity bill that is based on the amount of electrical energy consumed or supplied.

The analysis of atmospheric conditions, particularly moisture in the air.

A power plant that generates power by combusting a fuel.