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TESS TYPE 684 Economizer

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Topic starter

Hello,

I have the TRNSYS17 version. I have a quick question regarding TESS Type684. The type uses setinputunits to set air pressure units to PR2, which is in kPa units. However, all psychrometric calculations need to be done in PR4, in atm units. do you think there is any inconsistency in type coding? Please pardon me if I have some issues in understanding. My type684 source code was last edited on Sep 2021 by TESS engineers. I am not sure if this source code is used in the DLL file for the actual simulation. Thank you for expert opinion! 😀 

 

-Abir

1 Answer
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@tm-abir-ahsan

Abir, I think you're correct that there is an error in the code. Those units should all be PR4 instead of PR2. The error doesn't impact any calculations fortunately. What it will do is generate a warning in the *.lst file saying (incorrectly) that there is a units mismatch in the output/input connections.

Thanks for pointing it out! We'll get it fixed!

David

 

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