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Joris,<br>
It isn't actually the opening and closing that takes time (EES
stays running the whole time). The slowness is the EES calculation
time and the fact that EES is called at every single timestep and at
every single iteration within a timestep of your TRNSYS simulation.
There are a few different versions of Type66 that allow you to avoid
calling EES whenever possible (basically an input that is an on/off
switch for the EES calculations). If you know that your EES program
doesn't have to be called (because the device that it models is
inactive) then you can "turn off" the call to Type66 and save some
time. Take a look at the EES example in the
..\TrnsysXX\Examples\Calling_EES\ directory; all the different
options are shown in there.<br>
Kind regards,<br>
David<br>
<br>
<br>
On 2/20/2011 15:43, Doms Joris wrote:
<blockquote
cite="mid:8C2EF60B4FA8D34B9127CD88813A1F811F3992BB35@vitomail3.vito.local"
type="cite">
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<div>Dear TRNSYS users,</div>
<div> </div>
<div><font face="times new roman">When simulating an applied
thermal system, I'm using EES for the hydronic part. I
programmed the hydronic circuit in EES and coupled it with
TRNSYS via Type 66a. This coupling works fine, but;</font></div>
<div> </div>
<div><font face="times new roman">The problem is that the
simulation runs very slow. Every timestep that TRNSYS calls
EES, the EES project is opened and closed. Is there a way to
set some settings so EES isen't closed and reopened each time,
this would minimize the solution time alot.</font></div>
<div> </div>
<div><font face="times new roman">Thanks on advance</font></div>
<div> </div>
<div><font face="times new roman">Joris Doms</font></div>
<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
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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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