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Aisha,<br>
It can be done but it requires some manual modifications of the
TRNSYS input file (*.dck) outside of the Studio. Below are the basic
steps that you need to follow:<br>
<br>
1. first, you need to make a *.b17 file for each one of the cases
that you want to run in your parametric study. Save each one with a
different name.<br>
2. Open the *.dck in TRNEdit and find the ASSIGN statement that
corresponds to the *.b17 file. It should look something like the
following:<br>
<br>
<small><font face="Courier New, Courier, monospace">ASSIGN
"building\DHS_Baseline(v2).b17" 31</font></small><br>
<br>
3. Following the syntax given, make an ASSIGN statement for each of
the cases that you want to run. Give a different number to each one
but search through the *.dck and make sure that the numbers that you
choose are not used in another ASSIGN statement. For example:<br>
<br>
<small><font face="Courier New, Courier, monospace">ASSIGN
"building\DHS_Baseline(v2)_case1.b17" 31<br>
ASSIGN "building\DHS_Baseline(v2)_case2.b17" 32<br>
ASSIGN "building\DHS_Baseline(v2)_case3.b17" 33<br>
ASSIGN "building\DHS_Baseline(v2)_case4.b17" 34</font></small><br>
<br>
4. Find the section that defines Type56. It might look something
like:<br>
<br>
<font face="Courier New, Courier, monospace"><small>UNIT 5 TYPE
56 DHS ICE<br>
*$UNIT_NAME DHS ICE<br>
*$MODEL .\Loads and Structures\Multi-Zone Building\Type56.tmf<br>
*$POSITION 479 301<br>
*$LAYER Main # <br>
*$# <br>
PARAMETERS 3<br>
31 ! 1 Logical unit for building description file (.bui)<br>
0 ! 2 Star network calculation switch</small></font><br>
<br>
5. you need to add a CONSTANTS statement before the definition of
Type56 so that the logical unit number containing the building
description file is given by a variable name instead of by a
numerical value. You will have something like the following (changes
are noted in red):<br>
<br>
<font face="Courier New, Courier, monospace"><small><font
color="#ff0000">CONSTANTS 1<br>
LU_56 = 31</font><br>
<br>
</small><small>UNIT 5 TYPE 56 DHS ICE<br>
*$UNIT_NAME DHS ICE<br>
*$MODEL .\Loads and Structures\Multi-Zone Building\Type56.tmf<br>
*$POSITION 479 301<br>
*$LAYER Main # <br>
*$# <br>
PARAMETERS 3<br>
<font color="#ff0000">LU_56</font> ! 1 Logical unit for
building description file (.bui)<br>
0 ! 2 Star network calculation switch</small></font><br>
<br>
6. lastly, create a parametric table in TRNEdit that has as many
runs a you have cases and which redefines the value of the constant
LU_56 for each run according to the numbers that you chose for your
ASSIGN statements in step 3.<br>
Kind regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 11/28/2014 08:42, Ayesha Mohammed Al
Qubaisi wrote:<br>
</div>
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<p>Dear all,</p>
<p> </p>
<p>I would like to do a parametric study in which I can change
the wall materials defined in TRNbuild and see the change on
the building loads.( Cooling loads)</p>
<p> </p>
<p>can someone let me know how to do this easily ?</p>
<p> </p>
<p>For the meantime, I do this manually, by changing it in
TRNbuild every time.</p>
<p> </p>
<p>Please let me know ?</p>
<p> </p>
<p>Thank you for your time,</p>
<p>Aisha</p>
</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
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>
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