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<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a couple of questions concerning the relationship between the arrangement of data in TMY2 weather files, TRNSYS simulation times and convergence errors. I tried looking at the source code but I could not figure
out the answer..<br>
I am running a simulation for one year, using Type 15-2 for weather, starting at 1h on July 1<sup>st</sup> and ending at 24h on June 30<sup>th</sup>. This leaves me with two options:
<br>
1) Either I rearrange the tm2 file to start at 1h on the 1<sup>st</sup> of July and end at 24h on June 30<sup>th</sup>, and set the simulation start and stop times to 0 and 8760h respectively, or
<br>
2) Either I leave the weather file as it is and set the simulation start and stop times at 4344h and 13104h respectively.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When I use a provided weather file (e.g. CA-BC-Vancouver-718920.tm2) and set the simulation time step at 0.1h, I get the following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US"><o:p> </o:p></span></p>
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<td width="142" style="width:106.3pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">Failed convergence time steps<o:p></o:p></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">Time steps where:
<br>
calculated total horizontal radiation > horizontal extraterrestrial radiation<o:p></o:p></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">Time steps where:
<br>
direct normal radiation > solar constant<o:p></o:p></span></p>
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<td width="236" style="width:177.2pt;border:solid windowtext 1.0pt;border-left:none;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">Time steps where:
<br>
calculated horizontal beam radiation > total horizontal radiation<o:p></o:p></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">1)<o:p></o:p></span></p>
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<td width="142" style="width:106.3pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">7719<o:p></o:p></span></p>
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<td width="246" style="width:184.3pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">10664<o:p></o:p></span></p>
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<td width="161" style="width:120.45pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">124<o:p></o:p></span></p>
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<td width="236" style="width:177.2pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">3498<o:p></o:p></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">2)<o:p></o:p></span></p>
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<td width="142" style="width:106.3pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">6424<o:p></o:p></span></p>
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<td width="246" style="width:184.3pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">-<o:p></o:p></span></p>
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<td width="161" style="width:120.45pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">-<o:p></o:p></span></p>
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<td width="236" style="width:177.2pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt">
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US">13<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So my question are:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Why is TRNSYS giving different error messages if the same weather data are used ? (I believe that there are no other types in my file that could explain the reason for this)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">What parameters do the radiation values calculated by TRNSYS depend on and how are they calculated?
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">What is the best approach in this situation (minimal radiation errors)?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks a lot,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Ciarán<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph"><span lang="EN-US"><o:p> </o:p></span></p>
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