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Re: [EnergyPlus_Support] Re: spectral composition of solar radiation



Would the shadow calculation method & frequency as well as the diffuse modeling algorithm effect this?


Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions
120 E. Pritchard St.  | Asheboro, NC 27203  | Mobile 503-688-8951
  





On Tue, May 21, 2013 at 2:24 AM, Jean marais <jeannieboef@xxxxxxxxx> wrote:
 

I would guess the physical window does not change, therefore the ability of the window to absorb, transmit or reflect energy at a specific wave length remains constant and the infalling radiation at said wavelength is what is changing.

I have no idea how and if the energy at different wavelengths is varied or calculated during run time. I believe solar data is hour based, meaning at least the results are only varying on an hourly bases.

Anyone else? The weather guru here would be Dr Joe Huang at whitebox technologies. He wrote some of the weather processing models.

Jean



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "FrancescoP" <direzionecontraria@...> wrote:
>
> I'm modeling a sunspace and comparing the results with monitored data. The inside temperatures are influenced a lot by the model that is used for the windows, therefore I'm reading about the object MaterialProperty:GlazingSpectralData
> I have a question: how the is spectral composition of solar radiation considered in the simulation? I mean, is it considered constant or does it change during the simulation (in my layman's opinion, the distribution of energy among the different wavelengths, in percentage terms, depends on the cloudiness)?
> Regards
>




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