Monday, February 15, 2010

In this chart shows that total surface irradiance start from 5 AM and finish at 7 PM in summer and in winter start from 7AM until 6 PM . The shape of the line illustrate that total surface irradiance in the summer time is lower and that the incidence angle on the summer is closer to the normal angle of the vertical surface.

Summer (June)

Winter (December)

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