Re: [EnergyPlus_Support] WeatherData Problem with direct radiation and diffuse radiation

[Linda Lawrie <linda@xxxxxxxxxxxxxx>]

Look at the description of the Zhang-Huang algorithm in the
Auxiliary Programs document -- it uses cloud cover -- it may be if all
your cloud cover data is 0, then it will be all clear sky and no diffuse
calculated.

At 06:34 PM 4/21/2011, vicentina_0350024 wrote:
> Hi E+SUPPORTS:
>
> I was trying to get Normal Direct Radiation and Diffuse Horizontal
> Radiation via weather converter. (the only data I got is Global
> Horizontal Radiation.) After converting, the data of Normal Direct
> Radiation show up with figures but Diffuse Horizontal Radiation are all
> zero. 
>
> How could I get diffuse horizontal radiation?
> Is there other data I need to input to make it calculate?
>
>
>
> Thanks!
>
>
>
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