[EnergyPlus_Support] Solar radiation models?

["anarui.oliveira" <anarui.oliveira@xxxxxxxxx>]

Hi.

When E+ documentation mentions (pages 82-83 of Engineering Reference >> 
Climate, Sky and Solar/Shading Calculations >> Climate Calculations) 
that the default solar model used is the Clear Sky model...

.... what exactly does it mean, or what does it apply to?

I mean, don't the weather files usually include the effect of clear or 
cloudy days already?
Does the documentation refer solely to generating data for DesignDays?

Where else should I look to better understand how E+ uses solar 
radiation data?

Thanks in advance,
Ana Rui.


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