<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<p>Rasyiddin,</p>
<p> The equation dq/dt = m*Cp*dT/dt is derived with the assumption
that the specific heat is constant over the temperature range. If
the specific heat is not constant over the temperature range then
you would have to rederive all of the energy transfer terms in the
effected Types to account for the dCp/dt term. You would then need
to modify the Types' source code and recompile. <br>
</p>
<p> There are some components in the TESS High Temperature Solar
library that allow Cp to change. If you have access to that
library, it might be worth a look.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 05/01/2017 23:17, Rasyiddin Muhammad
via TRNSYS-users wrote:<br>
</div>
<blockquote
cite="mid:CADru2nh1Je0htW1EAJiweKTToxeXtHvY9oiKAU8w23w1noTRtA@mail.gmail.com"
type="cite">
<div dir="ltr">Hi,
<div><br>
</div>
<div>I am trying to change the fluid for a solar thermal system
from water to therminol 66. Thus, I would like to change the
specific heat capacity to a function of temperature instead of
having a single average value. </div>
<div>Is there a way that I can do this?<br>
</div>
<div><br>
</div>
<div>Also is there a way that I can change the fluid properties
for the whole system so that I would not have to change the
fluid properties for each component?</div>
<div><br>
</div>
<div>Any help would be appreciated.</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Rasyiddin </div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
TRNSYS-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a>
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a>
</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>
</body>
</html>