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Safwan,<br>
You need to modify your Matlab code so that it keeps track of
previous values of the pond's temperature. The TRNSYS kernel has
some features in it that will allow you to store values that your
component calculates from timestep to time step. If you want to
write your Type in Matlab, you have to recreate that functionality.
In writing the code make sure that you only update the last
calculated values at the end of a time step and that you base your
calculations on the value computed at the end of the previous time
step and not on the value calculated during the last iteration.<br>
Regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 8/21/2014 19:59, safwan ahmed wrote:<br>
</div>
<blockquote
cite="mid:1408669161.65289.YahooMailNeo@web160804.mail.bf1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff;
font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica
Neue, Helvetica, Arial, Lucida Grande,
sans-serif;font-size:10pt">
<div style="" class="">Dear All,</div>
<div style="" class=""><br style="" class="">
</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;">I try to
simulate solar pond connected to absorption chiller with
building, so I wrote Matlab code for solar pond which is solve
a transient partial differential equation for heat transfer
through it. That's mean there is a heat storage in solar pond
with delay time.</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;">Solar
pond's output temperature is the result of accumulate
temperature with time at each time step. <br>
</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;">I studied
the example in Trnsys which is used to call solar collector
Matlab code, however it is quite simple just to calculate
collector's outlet temperature and useful heat from algebraic
equations.</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;"><br
style="" class="">
</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;">Could you
please advise me to solve this problem, any information will
help me for that and if you have any documents in details
related to calling Matlab and close to my problem, I will be
appreciate that.</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;"><br>
</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;">I look
forward to hearing from you soon.</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;"><br>
</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;">Regards,</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;">Safwan
Kanan</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;">The
University of Manchester, UK<br>
</div>
<div class="" style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: HelveticaNeue-Light,Helvetica Neue
Light,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;
background-color: transparent; font-style: normal;"> </div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
***************************
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
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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