David,
Thenks!
So onion exchange.
The question remains: does TRNSYS wait on Excel calculation/interation or “tear out” data when they are needed, even if iteration are still running?
Regards,
Karol
From: David BRADLEY [mailto:d.bradley@tess-inc.com]
Sent: Monday, March 5, 2018 10:19 PM
To: TRNSYS users mailing list at OneBuilding.org
Cc: Karol Bandurski
Subject: Re: [TRNSYS-users] Excel iteration vs TRNSYS iteration
Karol,
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,
David
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
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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
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David BRADLEY
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