A system of astronomical time in which the sun crosses the true north-south meridian at 12 noon, and which differs from local time according to longitude, time zone, and equation of time.

The direct, diffuse, and reflected solar radiation that strikes a surface.

A type of inverter that produces square wave output.; consists of a DC source, four switches, and the load. The switches are power semiconductors that can carry a large current and withstand a high voltage rating. The switches are turned on and off at a c ...

A solar collector in which the absorber is contained in a sealed glass tube, thereby providing for relatively high temperature heat gain.

A load management objective that moves loads from on-peak periods to off-peak periods.

A frequently used room or area that is maintained at a more comfortable level than the rest of the house; also known as a "warm room."

Ethyl alcohol (C2H5OH)

The temperature of the air as measured by a standard thermometer.

A battery that uses lithium in the negative electrode and a metal sulfide in the positive electrode, and the electrolyte is molten salt; can store large amounts of energy per unit weight.

A type of lamp that produces light from sodium gas contained in a bulb operating at a partial pressure of 0.13 to 1.3 Pascal. The yellow light and large size make them applicable to lighting streets and parking lots.

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.

The process of converting municipal solid waste to energy and/or recovering materials for recycling.

The ability to dispatch power.

The heat produced by combusting a specific quantity and volume of fuel in an oxygen-bomb colorimeter under specific conditions.

A popular term used for an evaporative cooling device.

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.

Air that provides the necessary oxygen for complete, clean combustion and maximum heating value.

An electronic device that allows current to flow in one direction only.

Nonglossy paint with a relatively high absorptance.

The planting, cultivation, and harvesting of a single species of crop in a specified area.