<html><head></head><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1454999122795_2797"><span></span></div><div id="yui_3_16_0_1_1454999122795_2796"> </div><div id="yui_3_16_0_1_1454999122795_2789" class="signature"><div id="yui_3_16_0_1_1454999122795_2801">David,</div><div id="yui_3_16_0_1_1454999122795_2795"><br></div><div dir="ltr" id="yui_3_16_0_1_1454999122795_2802">Thank you for the answer. Does this mean that computing is the same for Type 55 as well?<br></div><div id="yui_3_16_0_1_1454999122795_2793"><br></div><div id="yui_3_16_0_1_1454999122795_2794">Is it possible to read just the last time step (which converged) output variable value of an integrator? Maybe with Type93 or similar?</div><div id="yui_3_16_0_1_1454999122795_3017"><br></div><div id="yui_3_16_0_1_1454999122795_3018">Marko<br></div><div id="yui_3_16_0_1_1454999122795_2881"><br></div><div id="yui_3_16_0_1_1448098022884_15644"><span></span></div></div><div id="yui_3_16_0_1_1454999122795_2788" class="qtdSeparateBR"><br><br></div><div style="display: block;" id="yui_3_16_0_1_1454999122795_2739" class="yahoo_quoted"> <div id="yui_3_16_0_1_1454999122795_2738" style="font-family: verdana, helvetica, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_1_1454999122795_2737" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_1_1454999122795_2786" dir="ltr"> <font id="yui_3_16_0_1_1454999122795_2787" size="2" face="Arial"> <hr id="yui_3_16_0_1_1454999122795_3020" size="1"> <b><span style="font-weight:bold;">From:</span></b> David BRADLEY <d.bradley@tess-inc.com><br> <b><span style="font-weight: bold;">To:</span></b> Marko Mancic <markomancic@yahoo.com>; TRNSYS users mailing list at OneBuilding.org <trnsys-users@lists.onebuilding.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Monday, February 8, 2016 10:56 PM<br> <b id="yui_3_16_0_1_1454999122795_3102"><span id="yui_3_16_0_1_1454999122795_3101" style="font-weight: bold;">Subject:</span></b> Re: [TRNSYS-users] Type 24 and equations question<br> </font> </div> <div id="yui_3_16_0_1_1454999122795_2736" class="y_msg_container"><br><div id="yiv4456084222"><div id="yui_3_16_0_1_1454999122795_2735">
Marko,<br clear="none">
Equations are assessed at every timestep (every iteration,
actually) and integrators are called after all of the components
(and equations) have reached convergence at a given time step. <br clear="none">
kind regards,<br clear="none">
David<br clear="none">
<br clear="none">
<br clear="none">
<div class="yiv4456084222yqt9325162376" id="yiv4456084222yqt68185"><div id="yui_3_16_0_1_1454999122795_2734" class="yiv4456084222moz-cite-prefix">On 02/07/2016 01:53, Marko Mancic
wrote:<br clear="none">
</div>
<blockquote id="yui_3_16_0_1_1454999122795_2979" type="cite">
<div id="yui_3_16_0_1_1454999122795_2978" style="color:#000;background-color:#fff;font-family:verdana, helvetica, sans-serif;font-size:16px;">
<div><span></span></div>
<div id="yiv4456084222yui_3_16_0_1_1454783917989_3062">Hi,</div>
<div id="yiv4456084222yui_3_16_0_1_1454783917989_3074"><br id="yiv4456084222yui_3_16_0_1_1454824176818_9107" clear="none">
</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454783917989_3075">I
am making some annual system performance analysis, and I am
not sure about how Trnsys performes some calculations.</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454783917989_3121"><br id="yiv4456084222yui_3_16_0_1_1454824176818_9111" clear="none">
</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454783917989_3122">I
am using Type24 to integrate some outputs over a time interval
from simulation START to STOP (i.e. one year). I would like to
make some simple equations using a few of the Type24 outputs
and compare some values .</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454783917989_3356"><br id="yiv4456084222yui_3_16_0_1_1454824176818_9115" clear="none">
</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454783917989_3357"><br id="yiv4456084222yui_3_16_0_1_1454824176818_9118" clear="none">
</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454783917989_3148">I
am not certain how Trnsys performes these calculations.</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454824176818_9448"><br clear="none">
</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454824176818_9457">Does Type24
integrate over a given time interval first, and mathematical
operations defined by the equations are carried out with the
integrated value at the end of that time interval (at the end
of the simulation/year), or, are these operations carried out
as defined by the equations for every timestep and then
summed?</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454824176818_9458"><br clear="none">
</div>
<div dir="ltr" id="yiv4456084222yui_3_16_0_1_1454824176818_9459">Marko</div>
</div>
<br clear="none">
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<br clear="none">
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</pre>
</blockquote></div>
<br clear="none">
<pre class="yiv4456084222moz-signature">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
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