10 Terms
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Energy efficiency
Industry: Energy
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Energy efficiency
Annual solar savings
Energy; Energy efficiency
The annual solar savings of a solar building is the energy savings attributable to a solar feature relative to the energy requirements of a non-solar building.
Solar declination
Energy; Energy efficiency
The apparent angle of the sun north or south of the earth's equatorial plane. The earth's rotation on its axis causes a daily change in the declination.
Nominal capacity
Energy; Energy efficiency
The approximate energy producing capacity of a power plant, under specified conditions, usually during periods of highest load.
Solar transmittance
Energy; Energy efficiency
The amount of solar energy that passes through a glazing material, expressed as a percentage.
Incident solar radiation
Energy; Energy efficiency
The amount of solar radiation striking a surface per unit of time and area.
Solar irradiation
Energy; Energy efficiency
The amount of solar radiation, both direct and diffuse, received at any location.
Payback period
Energy; Energy efficiency
The amount of time required before the savings resulting from your system equal the system cost.
