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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=PL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>David,<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'>Thenks!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>So onion exchange.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>The question remains: does TRNSYS wait on Excel calculation/interation or “tear out” data when they are needed, even if iteration are still running?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Karol<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:PL'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:PL'> David BRADLEY [mailto:d.bradley@tess-inc.com] <br><b>Sent:</b> Monday, March 5, 2018 10:19 PM<br><b>To:</b> TRNSYS users mailing list at OneBuilding.org<br><b>Cc:</b> Karol Bandurski<br><b>Subject:</b> Re: [TRNSYS-users] Excel iteration vs TRNSYS iteration<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p>Karol,<o:p></o:p></p><p> As far as I am aware TRNSYS has no knowledge of that is going on in Excel. Trnsys calls Excel, waits for Excel to return something and then proceeds on with calling the next component. If the system of Trnsys components did not converge then Trnsys iterates again and calls Excel again. I think that means that it an onion type of coupling.<o:p></o:p></p><p>kind regards,<o:p></o:p></p><p> David<o:p></o:p></p><p><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 03/02/2018 07:42, Karol Bandurski via TRNSYS-users wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span lang=EN-US>Dear All,</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>I am considering to couple TRNSYS and Excel model. My excel model is based on “circular reference” so to calculate excel make some iteration.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='mso-list:Ignore'>1)<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span lang=EN-US>Does TRNSYS respect it? I mean: does TRNSYS will wait with the next time step or iteration on excel calculation or TRNSYS take what is in given moment written in excel (even if iteration is running)?</span><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='mso-list:Ignore'>2)<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span lang=EN-US>Does TRNSYS – Excel coupling is onion or ping-pong type? I mean: does TRNSYS – excel data exchange is each iteration or each time step? </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Regards,<br>Karol</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:PL'>--------------------------------------------------------------------</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:PL'>Karol BANDURSKI M. Sc.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:PL'>Faculty of Civil and Environemntal Engeneering</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:PL'>Division of Heating, Air Conditioning and Air Protection</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US style='mso-fareast-language:PL'>Poznan University of Technology</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US><a href="https://www.researchgate.net/profile/Karol_Bandurski">https://www.researchgate.net/profile/Karol_Bandurski</a></span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D;mso-fareast-language:PL'><a href="http://www.put.poznan.pl/%7Ekarol.bandurski"><span lang=EN-US>www.put.poznan.pl/~karol.bandurski</span></a></span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:PL'><br><br><br><o:p></o:p></span></p><pre>_______________________________________________<o:p></o:p></pre><pre>TRNSYS-users mailing list<o:p></o:p></pre><pre><a href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a><o:p></o:p></pre><pre><a href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a><o:p></o:p></pre></blockquote><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:PL'><br><br><o:p></o:p></span></p><pre>-- <o:p></o:p></pre><pre>***************************<o:p></o:p></pre><pre>David BRADLEY<o:p></o:p></pre><pre>Principal<o:p></o:p></pre><pre>Thermal Energy Systems Specialists, LLC<o:p></o:p></pre><pre>22 North Carroll Street - suite 370<o:p></o:p></pre><pre>Madison, WI 53703 USA<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>P:+1.608.274.2577<o:p></o:p></pre><pre>F:+1.608.278.1475<o:p></o:p></pre><pre><a href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre><a href="http://www.tess-inc.com">http://www.tess-inc.com</a><o:p></o:p></pre><pre><a href="http://www.trnsys.com">http://www.trnsys.com</a><o:p></o:p></pre></div></body></html>