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<p>Amir,</p>
<p> Which v18 release is it? I tried with 18.00.0019 and 18.01.0000
and the simulations solves quickly. You can check the release
number by opening the file trnsys.ini using a text editor such as
Notepad. The steam quality is set to that odd value because the
liquid is subcooled at your conditions and therefore the quality
is undefined.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 08/13/2019 18:07, Amir Nashed via
TRNSYS-users wrote:<br>
</div>
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<p class="MsoNormal">Hi Jeff<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for the email<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am using TRNSYS 18<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If you want to replicate the issue, simply
useType58 and put P=10000kPa and h=940 kJ/kg and you will get
both issues: 1- super slow simulation 2- odd steam quality
value of -1.5e38<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-AU"
lang="EN-US">Best Regards,<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-AU"
lang="EN-US"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-AU"
lang="EN-US">Amir Nashed, PhD</span></b><b><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-AU"
lang="EN-US"><o:p></o:p></span></b></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="mso-fareast-language:EN-AU" lang="EN-US">From:</span></b><span
style="mso-fareast-language:EN-AU" lang="EN-US"> Jeff
Thornton <a class="moz-txt-link-rfc2396E" href="mailto:thornton@tess-inc.com"><thornton@tess-inc.com></a>
<br>
<b>Sent:</b> Wednesday, 14 August 2019 1:25 AM<br>
<b>To:</b> TRNSYS users mailing list at OneBuilding.org
<a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users@lists.onebuilding.org"><trnsys-users@lists.onebuilding.org></a><br>
<b>Cc:</b> Amir Nashed <a class="moz-txt-link-rfc2396E" href="mailto:a.nashed@unsw.edu.au"><a.nashed@unsw.edu.au></a><br>
<b>Subject:</b> Re: [TRNSYS-users] Slow model at boiler
pressure of 10000kPa<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Amir,<span
style="mso-fareast-language:EN-AU"><o:p></o:p></span></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">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.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Jeff - TESS<o:p></o:p></p>
<div id="AppleMailSignature">
<p class="MsoNormal">Sent from my iPhone<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
On Aug 12, 2019, at 6:56 PM, Amir Nashed via TRNSYS-users
<<a href="mailto:trnsys-users@lists.onebuilding.org"
moz-do-not-send="true">trnsys-users@lists.onebuilding.org</a>>
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal"><a name="_Hlk492040362"
moz-do-not-send="true">Dear TRNSYS users<o:p></o:p></a></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"> <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362">For some reason all
steam components at P=100 Bar (10,000 kPa) go very
slow</span><span style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt">, whether it is a
preheater, condensate pump..etc
</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt">The issue is not with the
model, as I isolated the components, for example
simulated type609 by itself and still did not work.</span>
. I believe the reason is the
</span><span style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt">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.</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt">Inputs:</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><image002.jpg><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt">Does anyone know how to
solve that?</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt">I can change the pressure,
but I believe 100 bars for boiler pressure is pretty
standard</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"> <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><b><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-AU"
lang="EN-US">Best Regards,</span></b><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><b><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-AU"
lang="EN-US"> </span></b><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><b><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-AU"
lang="EN-US">Amir Nashed, PhD</span></b><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-AU"
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style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-AU"
lang="EN-US">UNSW SYDNEY NSW 2052 AUSTRALIA</span><o:p></o:p></span></p>
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<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"><span
style="font-size:9.0pt;color:black;mso-fareast-language:EN-AU"
lang="EN-US"> </span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="mso-bookmark:_Hlk492040362"></span><a
href="http://www.unsw.edu.au/" moz-do-not-send="true"><span
style="mso-bookmark:_Hlk492040362"><span
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lang="EN-US"><image001.png></span></span><span
style="mso-bookmark:_Hlk492040362"></span></a><span
style="mso-bookmark:_Hlk492040362"></span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
</blockquote>
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<div>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
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