[TRNSYS-users] Slow model at boiler pressure of 10000kPa

[Jeff Thornton]

Amir,

Which version of TRNSYS are you using?  I know we identified and fixed an issue within the steam properties subroutine a few months back that might be the cause for your issue.

Jeff - TESS

Sent from my iPhone

> On Aug 12, 2019, at 6:56 PM, Amir Nashed via TRNSYS-users <trnsys-users at lists.onebuilding.org> wrote:
> 
> Dear TRNSYS users
>  
> For some reason all steam components at P=100 Bar (10,000 kPa) go very slow, whether it is a preheater, condensate pump..etc
> The issue is not with the model, as I isolated the components, for example simulated type609 by itself and still did not work. . I believe the reason is the the Steam_Properties() subroutine as when I tried to use Type58 just by itself at the same steam properties, the same issues occurred. When I reduce the pressure to 9300 kPa, it works fine.
>  
> Inputs:
> <image002.jpg>
>  
>  
> Does anyone know how to solve that?
>  
> I can change the pressure, but I believe 100 bars for boiler pressure is pretty standard
>  
>  
> Best Regards,
>  
> Amir Nashed, PhD
> Energy Engineer
> Estate Management
>  
> UNSW SYDNEY NSW 2052 AUSTRALIA
> E: a.nashed at unsw.edu.au
> T: +61 2 9385 3401
> M: +61 4 0597 9282
> W: www.estate.unsw.edu.au
> CRICOS Provider Code 00098G
>  
> <image001.png>
>  
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