[TRNSYS-users] direct and diffuse solar radiation through glazing

[Yuichi Yasuda]

Dear Wirich Freppel,

Is the "Total tilted surface radiation" the same unit as QSOLTR?

regards,
Yuichi

On 2020/02/07 18:08, Freppel, Wirich via TRNSYS-users wrote:
>
> Dear TRNsys users,
>
> I apologize in advance as this subject was already discussed one year 
> ago, but I think some more explanation could help me to go further in 
> my study. 
> (http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/2018-November/030610.html)
>
> I’m trying to calculate the Effective Radiant Field of an occupant, 
> based on TRNsys outputs. To complete the calculation, I need the total 
> diffuse solar radiation entering the airnode through glazing, as well 
> as the total direct radiation. Not being sure of what output I should 
> choose, I compared :
>
> -Total tilted surface radiation (which I assumed to be the total 
> direct and diffuse solar radiation arriving on the window)
>
> -QSOLTR (which I assumed to be the total shortwave solar radiation 
> transmitted through the window to the airnode)
>
> -QTABSI (which I assumed to be the total radiation transmitted to the 
> airnode)
>
> -QTSGL (which I assumed to be the total solar radiation passing from 
> outside surface of the window to the airnode)
>
> According to the results, at day time, so when there is solar 
> radiation, Total tilted surface is below the others. So it means, 
> according to what I see, that solar radiation is bigger after going 
> through the window. After those results, it’s difficult to say I 
> understood well what I am doing…
>
> Could you help me to understand those outputs and advise me on the 
> output to choose for “total diffuse solar radiation entering the 
> airnode” and “total direct solar radiation entering the airnode”?
>
> Marion mentioned to use “QSOLTR-QTSOUT”. That would be ok for me, but 
> why is QSOLTR bigger than total tilted surface radiation?
>
> Again, I’m really sorry for digging out that topic again but I do 
> think my interpretation is very bad at the moment.
>
> Thank you in advance for your help.
>
> *Wirich FREPPEL*
> Development engineer, PhD
>
> /COSMOS - /Buildings Energy Performance & Daylighting Group
>
> Cell: +33 637 053 174
>
> *Saint-Gobain Research Compiègne*
>
>
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> TRNSYS-users at lists.onebuilding.org
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-- 

安田　雄市 Yuichi Yasuda
株式会社クアトロ quattro corporate design co.,ltd
http://qcd.co.jp/
Tel:+81(0)3 5768 6744 Fax:+81(0)3 5768 6745
e-mail: yasuda at qcd.co.jp

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