<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN">
<html><body>
<p><I want to find the best configuration of the system (include the area of the collectors, the angle of azimuth&dip of the collector, the constant flowrate of the collectors, the volume of the storage tank ) .when i simulated it in trnsys and genopt using PSO ,i tried to set the object function as the sum of energy consumption in a year or the life circle cost of the system ,it turned out that the optimised area of collector is awalys to be the low limit of the collectors range i set in the genopt, may be it is the truth,i am confused.></p>
<p>Set the tank volume to something reasonable with typical flow rates. Set the collector slope to the latitude and the azimuth facing the equator. Run a simple parametric study and look at the life cycle cost of the system as a function of the collector area. It is VERY possible that the system will show increasing life cycle cost with increasing collector area - especially in a climate without a great solar resource.</p>
<p><Has anyone has the experience of optimization in similar system?how to confirm the best area of collector of the system?></p>
<p>We do optimizations on systems like this all the time but we don't ever start with a 5 variable optimization. We'll use the Hooke-Jeeves algorithm on the tank volume and array area to get us in the right ballpark (with slope = latitude and south facing collectors at standard flow rates). Once you are in the ballpark then you can expand to more variables and have some hope of finding a solution with that many variables.</p>
<p> </p>
<div>
<p>Jeff</p>
</div>
<div>
<p> </p>
</div>
<p> </p>
<div>
<pre>---<br />Jeff Thornton
President - TESS LLC
22 N. Carroll Street, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com
</pre>
</div>
<p>On 04/13/2016 9:31 am, Dr Yi Zhang wrote:</p>
<blockquote type="cite" style="padding-left:5px; border-left:#1010ff 2px solid; margin-left:5px"><!-- html ignored --><!-- head ignored --><!-- meta ignored --><!-- meta ignored --><!-- node type 8 --><!-- node type 8 --><!-- node type 8 -->
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size: 11.0pt; font-family: 'Calibri','sans-serif'; color: #1f497d;">I am not sure if the PSO in GenOpt is a multi-objective algorithm... if not, you need to set the weighting between the two objectives "right" in order to get the desired result. Try jEPlus+EA for a multi-objective approach, which will show you the trade-off between performance and cost: http://www.jeplus.org/wiki/doku.php?id=docs:jeplus_ea:features<!-- o ignored --></span></p>
<p class="MsoNormal"><span style="font-size: 11.0pt; font-family: 'Calibri','sans-serif'; color: #1f497d;"><!-- o ignored --> </span></p>
<p class="MsoNormal"><span style="font-size: 11.0pt; font-family: 'Calibri','sans-serif'; color: #1f497d;">Seeing the trade-off will help you answer your second question, too.<!-- o ignored --></span></p>
<p class="MsoNormal"><span style="font-size: 11.0pt; font-family: 'Calibri','sans-serif'; color: #1f497d;"><!-- o ignored --> </span></p>
<p class="MsoNormal"><span style="font-size: 11.0pt; font-family: 'Calibri','sans-serif'; color: #1f497d;">Regards,<!-- o ignored --></span></p>
<p class="MsoNormal"><span style="font-size: 11.0pt; font-family: 'Calibri','sans-serif'; color: #1f497d;"><!-- o ignored --> </span></p>
<p class="MsoNormal"><span style="font-size: 11.0pt; font-family: 'Calibri','sans-serif'; color: #1f497d;">Yi<!-- o ignored --></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"></a><span style="font-size: 11.0pt; font-family: 'Calibri','sans-serif'; color: #1f497d;"><!-- o ignored --> </span></p>
<div style="border: none; border-top: solid #B5C4DF 1.0pt; padding: 3.0pt 0cm 0cm 0cm;">
<p class="MsoNormal"><strong><span style="font-size: 10.0pt; font-family: 'Tahoma','sans-serif';">From:</span></strong><span style="font-size: 10.0pt; font-family: 'Tahoma','sans-serif';"> TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org] <strong>On Behalf Of </strong>Free<br /><strong>Sent:</strong> 13 April 2016 14:47<br /><strong>To:</strong> trnsys-users<br /><strong>Subject:</strong> [TRNSYS-users] (PLEASE)optimization of a solar heating system combined with dual-source heatpump<!-- o ignored --></span></p>
</div>
<p class="MsoNormal"><!-- o ignored --> </p>
<div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;">Dear all<!-- o ignored --></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;">I am now doing a project named "optimization of a solar heating system combined with dual-source heatpump(dual-source:water in storage tank and outdoor air)" in trnsys for my master degree thesis, the system is just used for space heating in heating season at a high and cold area where the solar radiation is not so good.The schematic diagram of the system is as follow:<!-- o ignored --></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;"><img id="_x0000_i1025" src="cid:78fb3040c5a5971506439c2769094ba1@tess-inc.com" alt="" width="903" height="315" /><!-- o ignored --></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;">I want to find the best configuration of the system (include the area of the collectors, the angle of azimuth&dip of the collector, the constant flowrate of the collectors, the volume of the storage tank ) .when i simulated it in trnsys and genopt using PSO ,i tried to set the object function as the sum of energy consumption in a year or the life circle cost of the system ,it turned out that the optimised area of collector is awalys to be the low limit of the collectors range i set in the genopt, may be it is the truth,i am confused.<!-- o ignored --></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;"><!-- o ignored --> </span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;">another question which is really important to me:<!-- o ignored --></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;">Has anyone has the experience of optimization in similar system?how to confirm the best area of collector of the system?<!-- o ignored --></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;">any advice is much appreciated.<!-- o ignored --></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;">Ware<!-- o ignored --></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: 'Arial','sans-serif'; color: black;">best regards<!-- o ignored --></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom: 12.0pt;"><!-- o ignored --> </p>
<p> <!-- o ignored --></p>
</div>
<!-- html ignored --><br />
<pre>_______________________________________________
TRNSYS-users mailing list
<a href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a>
<a href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a>
</pre>
</blockquote>
</body></html>