[TRNSYS-users] TR: longwave radiation mode with 2 airnodes

[hotline]

Hi Antoine,
 
adjacent windows between airnodes inside of one radiative zone are not
possible. Normally in such cases there are fully transparent openings 
for that you won't need a window definition because even without this
window all walls are in radiation exchange. 
Would be interesting how you got this defined in order to avoid this in
the next TRNBUILD version. 
 
Regards

Christian

 

TRANSSOLAR Software Team

hotline at transsolar.com

 

www.trnsys.de

Transsolar KlimaEngineering - Technologien für energieeffizientes Bauen
und Nutzerkomfort in Gebäuden                                    

Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart /
Amtsgericht Stuttgart - HRB 23347 / UsSt.-Id: DE152272639

Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer,
Dipl.Phys. Stefan Holst, Prof. Volkmar Bleicher

 

  _____  

Von: Antoine Gautier [mailto:antoine.gautier at solamen.fr] 
Gesendet: Donnerstag, 16. Juni 2011 19:07
An: trnsys-users at cae.wisc.edu
Betreff: [TRNSYS-users] TR: longwave radiation mode with 2 airnodes



.inf file was deleted from my previous sending.

 

De : Antoine Gautier [mailto:antoine.gautier at solamen.fr] 
Envoyé : jeudi 16 juin 2011 18:39
À : 'trnsys-users at cae.wisc.edu'
Objet : TR: longwave radiation mode with 2 airnodes

 

On the same topic…

 

I am trying to model a fully glazed wall with fully transparent window
between the 2 airnodes to account for radiative transfers. 

When I save the building file I get the message: “.inf etc. generated
successfully”.

However when I launch the simulation I get the message in attachment
which appears in TRNEXE window.

If you check the .inf file you will notice that adjacency is well
defined for surfaces 9, 11, 12 and 13 despite the previous message
error.

Eventually the simulation goes on but the results tend to convince me
that radiative transfers are not correctly calculated between the 2
airnodes.

 

Do you have any idea to solve this problem?

Thanks a lot.

 

Regards

--

Antoine Gautier
Solamen
+33 6 98 78 56 46

antoine.gautier at solamen.fr

 

De : Antoine Gautier [mailto:antoine.gautier at solamen.fr] 
Envoyé : jeudi 16 juin 2011 14:27
À : 'trnsys-users at cae.wisc.edu'
Objet : longwave radiation mode with 2 airnodes

 

Dear all

 

I understand from the user manual §5 that longwave radiation exchange is
not taken into account between 2 airnodes of the same zone under
standard (starnet) or “one node” radiation mode.

 

Could you please confirm my understanding?

 

Then what is the best strategy to transfer internal gains and radiative
heating flux (e.g. from active layer) to the other airnode of the same
zone when not using 3D data?

 

Thanks a lot for your help.

Best regards

--

Antoine Gautier
Solamen
+33 6 98 78 56 46

antoine.gautier at solamen.fr

 


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