[TRNSYS-users] Excel iteration vs TRNSYS iteration

David BRADLEY d.bradley at tess-inc.com
Mon Mar 5 13:19:29 PST 2018


  As far as I am aware TRNSYS has no knowledge of that is going on in 
Excel. Trnsys calls Excel, waits for Excel to return something and then 
proceeds on with calling the next component. If the system of Trnsys 
components did not converge then Trnsys iterates again and calls Excel 
again. I think that means that it an onion type of coupling.

kind regards,


On 03/02/2018 07:42, Karol Bandurski via TRNSYS-users wrote:
> Dear All,
> I am considering to couple TRNSYS and Excel model. My excel model is 
> based on “circular reference” so to calculate excel make some iteration.
> 1)Does TRNSYS respect it? I mean: does TRNSYS will wait with the next 
> time step or iteration on excel calculation or TRNSYS take what is in 
> given moment written in excel (even if iteration is running)?
> 2)Does TRNSYS – Excel coupling is onion or ping-pong type? I mean: 
> does TRNSYS – excel data exchange is each iteration or each time step?
> Regards,
> Karol
> --------------------------------------------------------------------
> Karol BANDURSKI M. Sc.
> Faculty of Civil and Environemntal Engeneering
> Division of Heating, Air Conditioning and Air Protection
> Poznan University of Technology
> https://www.researchgate.net/profile/Karol_Bandurski
> www.put.poznan.pl/~karol.bandurski 
> <http://www.put.poznan.pl/%7Ekarol.bandurski>
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Thermal Energy Systems Specialists, LLC
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d.bradley at tess-inc.com


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