Re: [TRNSYS-users] Atrium simulation

["Marion Hiller" <hiller@transsolar.com>]

Ümit,

For TRNSYS 17, one main focus was the improvement of the simulation of 
highly glazed 
large spaces such as multi-story atriums with respect to accuracy, user 
effort and error-proneness.

In TRNSYS 17 a zone can have multiple airnodes. The solar (diffuse and 
beam) radiation is distributed to all surfaces 
of all airnodes of the zone. In addition, for external shading factors 
of solar radiation can be 
handled automatically. Also, for convex zones the incoming beam 
radiation can be distributed automatically 
depending on the suns position, the external shading and the zone 
geometry. 

In TRNSYS 16 everything has to be done manually. The atrium has to be 
divided into three zone separated 
by so-called fictive windows in order to allow solar radiation 
penetration from one zone to another zone. 
Therefore, for each zone GEOSURF factors for beam radiation have to be 
defined. There was no control of Diffuse radiation.
After the transmission through the second adjacent window all solar 
radiation is treated as diffuse radiation. 
Thus, also the lowest zone receives solar radiation but it is 
distributed as diffuse radiation.

For atrium simulation I definitely recommend to use TRNSYS 17. 

Marion


-----Ursprüngliche Nachricht-----
Von: "Ümit Esiyok" [mailto:umit.esiyok@uni-dortmund.de] 
Gesendet: Montag, 9. August 2010 20:57
An: trnsys-users@cae.wisc.edu
Betreff: [TRNSYS-users] (no subject)

Dear All,

I am going to simulate a five -storey high Atrium. The roof is fully 
glazed, I divide the atrium into three Zones but from Archives of TRNSYS 
mailing list I saw an E-mail from David, says lowest zone receive no 
solar radiation. have anyone an experience with Atrium simulation.

Best Regards

--
Ümit Esiyok

e-mails: umit.esiyok@uni-dortmund.de

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