[TRNSYS-users] Incorrect visual transmission values / negative value for non visual Transmission

[Toni Calabrese]

Hi Christina,
actually it as my first time with WINDOW7.7. So it is possible that I did something wrong and totally unintentional. I am not interested in daylight analysis. So what I did is just choose panes in order to reach the U and g value that we wanted, but if there would be the possibility to solve this error doing omething different in WINDOW7.7 I would be definitely interested.

What should I do?

Thanks a lot.

From: hotline <hotline at Transsolar.com>
Sent: Monday, July 5, 2021 10:31 AM
To: TRNSYS users mailing list at OneBuilding.org <trnsys-users at lists.onebuilding.org>; David BRADLEY <d.bradley at tess-inc.com>
Cc: Toni Calabrese <toni.calabrese at ost.ch>
Subject: AW: Incorrect visual transmission values / negative value for non visual Transmission

Hi Toni,

according to the files you attached, every pane of your window is coated on the outside. That seems an unusual configuration, is that really what you are trying to model? You could also export your W7.7 configuration to a *.mdb file, then we can have a look and understand how it was generated.

Best regards,
Christina

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Von: TRNSYS-users <trnsys-users-bounces at lists.onebuilding.org<mailto:trnsys-users-bounces at lists.onebuilding.org>> im Auftrag von Toni Calabrese via TRNSYS-users <trnsys-users at lists.onebuilding.org<mailto:trnsys-users at lists.onebuilding.org>>
Gesendet: Donnerstag, 1. Juli 2021 08:05
An: TRNSYS users mailing list at OneBuilding.org <trnsys-users at lists.onebuilding.org<mailto:trnsys-users at lists.onebuilding.org>>; David BRADLEY <d.bradley at tess-inc.com<mailto:d.bradley at tess-inc.com>>
Cc: Toni Calabrese <toni.calabrese at ost.ch<mailto:toni.calabrese at ost.ch>>
Betreff: [TRNSYS-users] Incorrect visual transmission values / negative value for non visual Transmission


Hi everyone,

I used WINDOW 7.7 (following step by step the attached tutorial) to model four windows and I exported the *.dat file (here attached).



I imported it in TRNBUILD library to run a simulation (I am using Trnsys18). The model works but in the log file appear messages regarding the "visual transmission values" and the "incorrect  selectivity of visual+solar transmission" (see attached the log file).



It is the first time I am using WINDOW 7.7. Probably I did something wrong.



Could you please check the *.dat file in order to understand if the *.dat file is correct? I asked already the developers of WINDOW tool, but they told me this is something correlated to Trnsys itself.



Thanks a lot and have a nice day.





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