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Re: [EnergyPlus_Support] Re: Day type from Weather file



There are 6 CIE sky types that are defined in  E+ (see Engineering reference, daylighting part). Normal and diffuse irradiation are used.

On Wed, Jul 13, 2011 at 12:53 PM, Vinay Devanathan <vinay.devanathan@xxxxxxxxx> wrote:
 

Hey Niraj,
 
That's great info. Thank you very miuch!
 
Vinay


On Mon, Jul 11, 2011 at 12:04 PM, Niraj Poudel <nirajpoudel@xxxxxxxxx> wrote:
 

If you open your weatherfile in Excel .CSV format. There you will find a column for "Opaque Sky Cover" that denotes the "clearness" of the sky.

Page 65 of AuxiliaryPrograms.Pdf says:
"Field: Opaque Sky Cover
This is the value for opaque sky cover (tenths of coverage). (i.e. 1 is 1/10 covered. 10 is total coverage). (Amount of sky dome in tenths covered by clouds or obscuring phenomena that prevent observing the sky or higher cloud layers at the time indicated.) This is not used unless the field for Horizontal Infrared Radiation Intensity is missing and then it is used to calculate Horizontal Infrared Radiation Intensity. Minimum value is 0; maximum value is 10; missing value is 99."

Niraj Poudel
Clemson University



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Vinay Devanathan <vinay.devanathan@...> wrote:
>
> Dear All,
>
> I would like to know if there is a way to determine the day type from a
> weather file, like say separate days with clear skies, mildly cloudy, cloudy
> etc.
>
> Any suggestions or help would be great.
>
> Thank you.
>
> Vinay
>





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