Re: [EnergyPlus_Support] Weather data - DISC Maxwell

[Chris <chris@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Camille,

I might be able to help if you provide the sun's zenith angles or air 
masses for these conditions...

Chris

> I would like create an epw file from real weather data. 
>
> I have Global Horizontale Insulation and try to approximate Direct Normal Radiation. The Direct Insolation Code (DISC) Model developed by Dr. E.L. Maxwell seems to do it. 
>
> However, I found negative and positive values for Direct Normal Insulation. Two exemple :
>
> lat:50,56 ; long:2,48 ; date:8th Novembre,12h00 ; ETR:1396 ; TZ=1 ; DayAgle:5,35 ; GlobaleHorizontaleInsulation:314W/m² ; DirectNormalInsulation:645W/m²
>
> lat:50,56 ; long:2,48 ; date:1st Novembre,10h00 ; ETR:1391 ; TZ=1 ; DayAgle:5,23 ; GlobaleHorizontaleInsulation:28W/m² ; DirectNormalInsulation:-48W/m²
>
> while the first one seems coherent, the second one isn't possible.
>
> I probably make a mistake, but I don't find it. Have you an idea ?
>
> Thanks in advance 
>
> Camille T.
>
>   


-- 
Chris A. Gueymard, PhD
Solar Consulting Services
P.O. Box 392
Colebrook, NH 03576, USA
Tel. (603) 237-8550
Fax  (603) 237-5314
http://www.SolarConsultingServices.com



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