Solar radiation with a cloudy sky

Total solar radiation on a horizontal surface under a cloudy sky, Gtc

GtHc= CCF (GDH + GdH)

The CCF is the cloud cover factor detennined from

CCF = P + Q CC + R CC2

Where P. Q. R = coefficients

CC = cloud cover ( a variable between 0-10)

Posted in Fundamentals of Heating. Ventilating, and Air-Conditioning

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