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INTRODUCTION TO SUN, SOLAR GEOMETRY, axial-tilt-of-the-earth-vector…
INTRODUCTION TO SUN
COMPRISE OF
Tropic of Cancer
Equinox
Tropic of Capricorn
Earth axis tilt 23.5°.
Area receive maximum sunlight intensity
different
over the year.
Autumnal Equinix [Sept 23]
Summer Solstice [June 21]
Vernal Equinox [March 21]
Winter Equinox [Dec 21]
APPLICATION
enable prediction of
Sunlight patches on interior floors & walls.
Building shadow cast.
solar radiation direction & intensity.
sunlit building faces.
SOLAR GEOMETRY
ELEMENTS
Altitude
Angular height of sun above horizon line
angle range: 0° - 90°
Azimuth
Angle of the actual direction of sun with North on plan.
Angle range: 0° - 180°
Zenith
Point in sky vertically above observer.
Prediction of sun position via
sun path diagram
