20 Terms
Home > Industry/Domain > Energy > Energy efficiency
Energy efficiency
Industry: Energy
Add a new termContributors in Energy efficiency
Energy efficiency
Net energy production
Energy; Energy efficiency
The amount of useful energy produced by a system less the amount of energy required to produce the fuel.
Visible light transmittance
Energy; Energy efficiency
The amount of visible light that passes through the glazing material of a window, expressed as a percentage.
Electric energy
Energy; Energy efficiency
The amount of work accomplished by electrical power, usually measured in kilowatt-hours (kWh). One kWh is 1,000 Watts and is equal to 3,413 Btu.
Solar altitude angle
Energy; Energy efficiency
The angle between a line from a point on the earth's surface to the centre of the solar disc, and a line extending horizontally from the point.
Solar azimuth
Energy; Energy efficiency
The angle between true south and the point on the horizon directly below the sun.
Collector tilt
Energy; Energy efficiency
The angle that a solar collector is positioned from horizontal.
