Re: [EnergyPlus_Support] Weather data - DISC Maxwell

[camille thiriez <le_carambar@xxxxxxxx>]

I add, sun's zenith angle and mass air !

1 : Lat:50,56 ; long:2,48 ; date:8th Novembre,12h00 ; ETR:1396 ; TZ=1 ; DayAgle:5,35 ; ZenithAngle:68,4 ; MassAir:2,7 ; GlobaleHorizontaleInsulation: 314W/m² ; DirectNormalInsulation:645W/ m²

2 : lat:50,56 ; long:2,48 ; date:1st Novembre,10h00 ; ETR:1391 ; TZ=1 ; DayAgle:5,23 ; ZenithAngle:76,2 ; MassAir:4,2 ;GlobaleHorizontaleI nsulation: 28W/m² ; DirectNormalInsulat ion:-48W/ m²

Camille T.

--- En date de : Lun 22.6.09, Chris <chris@xxxxxxxxxxxxxxxxxxxxxxxxxxx> a écrit :

De: Chris <chris@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Objet: Re: [EnergyPlus_Support] Weather data - DISC Maxwell
À: EnergyPlus_Support@xxxxxxxxxxxxxxx
Date: Lundi 22 Juin 2009, 16h57

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 ; GlobaleHorizontaleI nsulation: 314W/m² ; DirectNormalInsulat ion:645W/ m²
>
> lat:50,56 ; long:2,48 ; date:1st Novembre,10h00 ; ETR:1391 ; TZ=1 ; DayAgle:5,23 ; GlobaleHorizontaleI nsulation: 28W/m² ; DirectNormalInsulat ion:-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.SolarCon sultingServices. com

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