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

[Jeff Thornton <thornton@tess-inc.com>]

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@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:

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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@unsw.edu.au

T: +61 2 9385 3401

M: +61 4 0597 9282

W: www.estate.unsw.edu.au

CRICOS Provider Code 00098G

 

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