[EnergyPlus_Support] Re: Weather data

["antonia.labianca" <antonia.labianca@xxxxxxxxx>]

Hi Linda,
your explanation in very clear.
Thank you!

Tonia



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@...> wrote:
>
> for calculation of solar direct normal radiation from solar direct
> horizontal radiation I know a "simple" formula based on
> solar height:
> 
> I_sol_dir_nor := I_sol_dir_hoz / (SIN (solar_height));
> 
> That is, the Direct Normal Solar Radiation is equal to the Direct 
> Horizontal Radation / Sine of the Solar Height (altitude)
> 
> Direct Horizontal Radiation is Global Horizontal Radiation - Diffuse 
> Horizontal Radiation
> 
> Of course, this means you must calculate the sun position for the
time/date.
> 
> Or you can let the Weather Converter do it for you using a "custom 
> file format" and a "def" (definitions) file that tells the program 
> about the data file.
> 
> 
> Linda
> 
> EnergyPlus WebSite: http://www.energyplus.gov
> Owner: EnergyPlus_Support list
> Member: EnergyPlus Development Team
> 
> 
> 
> [Non-text portions of this message have been removed]
>




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