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Mariana,<br>
I am having a little trouble understanding whether you are trying to
force Type56 to iterate within a time step or whether you are trying to
prevent Type56 from iterating within a time step. Either way, it is a
very complicated thing to do; Type56 not only has its own internal
iterative solver but its inputs and outputs feed into the iterative
solver within the TRNSYS kernel. I suspect that not only would you have
to change the Type56 code but you would also have to change the kernel
code as well. <br>
<br>
If you are running into convergence problems with a model, it is best
to try and solve those by adjusting time steps and by looking carefully
at your system and controls. There are some cases in which you might
need to insert a time delay into a model. There are two models that
allow you do hold on to an output for one or more time steps before
releasing it. This will have the effect of preventing some iteration
because an output change in one model will not be noticed by the next
model until the following time step. Be very careful in implementing
these components because while they are convenient and an easy way to
"improve" convergence, most often it is best to solve non-convergence
problems by looking carefully at time steps and controls and not by
adding arbitrary delays.<br>
Best,<br>
David<br>
<br>
On 8/4/2010 04:07, ghetu mariana wrote:
<blockquote cite="mid:511477.43805.qm@web27108.mail.ukl.yahoo.com"
type="cite">
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<p class="MsoNormal"><span style="" lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="" lang="EN-US"><br>
</span></p>
<p class="MsoNormal"><span style="" lang="EN-US">Does anyone
know how can I have one iteration per timestep within Type 56? I need
to insert
something like: Tint(INFO(7)=0) = Tint(INFO(7)=1)</span>.</p>
<p class="MsoNormal"> Is there a way to do this without changing the
code of Type
56?</p>
<p class="MsoNormal"><span style="" lang="EN-US"><br>
</span></p>
<p class="MsoNormal"><span style="" lang="EN-US">Thanks for
any info.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="" lang="EN-US"><br>
</span></p>
<p class="MsoNormal"><span style="" lang="EN-US">Mariana GHETU</span></p>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
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