A site is located at 20 deg South. Determine the solar altitude and the best tilt angle for PV array at solar noon when the Sun is over the tropic of capricorn. Draw solar altitude and the best tilt angle for PV array by using geometrical method.

Structural Analysis
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A site is located at 20 deg South. Determine the solar altitude and the best tilt angle for PV array at solar noon when the Sun is over the tropic of capricorn. Draw solar altitude and the best tilt angle for PV array by using geometrical method.

c) Over the Tropic of Capricorn
Site and Sun in SAME HEMISPHERE
N
Solar altitude (a) = 90 deg - 0 ± 23.45 deg = 90 deg - 20 + 23.45 deg = 93.45 deg facing North
Or
Solar altitude (a) - 180 deg - 93.45 deg - 86.55 deg facing South
Best tilt angle (B) = 180 deg - 90 deg - a = 90 deg - 86.55 = 3.45 deg facing South
Transcribed Image Text:c) Over the Tropic of Capricorn Site and Sun in SAME HEMISPHERE N Solar altitude (a) = 90 deg - 0 ± 23.45 deg = 90 deg - 20 + 23.45 deg = 93.45 deg facing North Or Solar altitude (a) - 180 deg - 93.45 deg - 86.55 deg facing South Best tilt angle (B) = 180 deg - 90 deg - a = 90 deg - 86.55 = 3.45 deg facing South
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