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<p class="MsoNormal"><span style="color:#1F497D">Dear Marion,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks for your email.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">As you can see from the screenshots in my previous email, I didn’t change the U-value of windows. What I did is:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="color:#1F497D">I created those windows using the WINDOW program (exactly followed the official tutorials) and modified the information in TRNSYS folders according.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">You mentioned Type56 wouldn’t use SHGC value for the calculation but, is there any reason that the internal load changes when the visible light transmittance (VLT) changes (meanwhile other parameters of the window
are not changed)? Because I think the variation of VLT has very limited influence on the internal loads of the space, but how come in my case the load changed as the VLT changed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Many thanks!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Best regards.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Siliang<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Marion Hiller via TRNSYS-users<br>
<b>Sent:</b> Monday, 25 March 2019 6:58 PM<br>
<b>To:</b> TRNSYS users mailing list at OneBuilding.org <trnsys-users@lists.onebuilding.org><br>
<b>Cc:</b> Marion Hiller <Hiller@Transsolar.com><br>
<b>Subject:</b> Re: [TRNSYS-users] Does TRNSYS actually take the SHGC into account for the load calculation?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="DE" style="mso-fareast-language:EN-US">Dear Siliang,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Did you change the u-value only or did you generate a new glazing properties with window?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Type 56 doesn’t use the g-value for the simulation, it is displayed only for selecting a window.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Further information on the window modeling is found in Trnsys documentation of Type 56.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Marion<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="DE">Von:</span></b><span lang="DE"> TRNSYS-users <<a href="mailto:trnsys-users-bounces@lists.onebuilding.org">trnsys-users-bounces@lists.onebuilding.org</a>>
<b>Im Auftrag von </b>Siliang Yang via TRNSYS-users<br>
<b>Gesendet:</b> Montag, 25. März 2019 08:00<br>
<b>An:</b> TRNSYS users mailing list at OneBuilding.org <<a href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>><br>
<b>Cc:</b> Siliang Yang <<a href="mailto:siliang.yang@unsw.edu.au">siliang.yang@unsw.edu.au</a>><br>
<b>Betreff:</b> [TRNSYS-users] Does TRNSYS actually take the SHGC into account for the load calculation?<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="DE"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Dear colleagues,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I am trying to analyse how the heating/cooling load of the space will be influenced by varying the solar heat gain coefficient (SHGC) of the external window. I created groups of windows as follows:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><img border="0" width="513" height="394" style="width:5.3416in;height:4.1in" id="Picture_x0020_17" src="cid:image001.png@01D4E343.E60E7C50" alt="WinID-Lib"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">As you can see, the SHGC (g-value) was gradually changed while the visible light transmittance (VLT) was identical for each group of windows. From the physics point of view, the internal load should be changed
as the change of SHGC. However, refer to my TRNSYS simulation results (see the following screenshot), the internal load did not change with the change of SHGC value while the VLT value was constant. It seems like the load will change as the VLT changes which
is not related to the SHGC at all.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><img border="0" width="843" height="350" style="width:8.7833in;height:3.6416in" id="Picture_x0020_19" src="cid:image002.png@01D4E343.E60E7C50" alt="NatVent_SHGC_VLT_SummerWk_Sydney.xlsx - Excel"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I don’t think those are reasonable results and I’ve carefully checked my TRNSYS models for sure the models were correct. That will be very appreciated if anyone might point out the seasons for the issue of my
case.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thank you so much!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Siliang<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:8.5pt;font-family:"Arial",sans-serif;color:#E36C0A;mso-fareast-language:EN-AU">Siliang Yang</span></b><span style="font-size:8.5pt;font-family:"Arial",sans-serif;color:#7F7F7F;mso-fareast-language:EN-AU"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:8.5pt;font-family:"Arial",sans-serif;color:#7F7F7F;mso-fareast-language:EN-AU">PhD Candidate and Casual Academic, UNSW Built Environment
<o:p></o:p></span></i></p>
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