09 Sep '11, 6pm

Solar Radiation Basics #Solar #Renewable

The sun and its radiation have agreat impact on the entire earth. Most forms of fuel and energy have derivedtheir power from th esolar power originally. This solar energy is the beginning for the chemical and biological processeson our planet. When fossil fuels and biomass sources are used for energyone is simply trying to recoup the solar power contained within. The winds and oceancurrents also pull some of their energy from the sun’s heat. Thus it makes sense to glean energy from this magnificent source directly. To properly analyze potential ofsolar power, one must understand its trajectory across the earth’s sky. This path can be described with three variables: the azimuthal angle, zenith angle,and hour angle. The azimuthal angle is known as the angle (going clockwise) that the sun makes against the north line. The zenith is a vector forming a 90o angle (also known as ...

Full article: http://www.renewableenergyworld.com/rea/blog/post/2011/09...

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