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<p class="MsoNormal">I have a question concerning doe2/eQUEST DESIGN-DAYs.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">One of the keywords for DESIGN-DAY confuses me: CLIMATE. I have not been able to find this documented in the current doe2 reference manual or 2.1A engineering manuals.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It appears the CLIMATE keyword can accept one of three inputs: “SUBARCTIC,” “MIDLATITUDE,” or “TROPICAL.” The default is MIDLATITUDE and does not appear to reference anything else.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img width="567" height="463" style="width:5.9062in;height:4.8229in" id="_x0000_i1027" src="cid:image003.png@01D24A2F.95A67C40"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So I have a few questions:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>What is this input used for? Does it help to determine solar angles during design day calculations? Does it affect how other DESIGN-DAY inputs are interpreted?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Since one of the options is named “MIDLATITUDE,” my best guess is this is trying to establish in a loose sense which slice of the globe the weather station is located at for solar angle purposes. From that guess,
<a href="http://www.lat34north.com/cities/CitiesLatitude.cfm">I googled the topic for a bit</a> and came up with this framework:<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">a.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>SUBARCTIC latitudes are > 66.5 or < -66.5 (Inside the Arctic circles – experiences days of complete daylight/darkness)<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">b.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>TROPICAL is between -23.5 and 23.5 (Tropic of Capricorn/Cancer – experiences the sun traversing directly overhead)<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">c.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>MIDLATITUDE = everywhere else<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I struggle however with the concept of a DESIGN-DAY input based on latitude, where<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">a.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>The latitude is already a part of the weather file required for every simulation… and pulling the exact latitude would be more accurate anyway (I confess here I have never studied solar pathing in great depth – the problem may be simpler
than I realize?).<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">b.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>These bands alone don’t give you enough information to know when you’re in the lower hemisphere (where solar angles based on the day/month would be flipped)<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">c.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>This leads me to question whether there’s a (meaningful) difference in solar angles experienced for loads calculations when you use the weather file instead of DESIGN-DAY inputs.
<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">d.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Alternatively, maybe the latitude IS pulled from the weather file for solar angle purposes so I’m completely on the wrong path as to the purpose/intent for the CLIMATE input.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can anyone set me straight on this topic?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">~Nick<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#3A7A46"><img border="0" width="722" height="9" style="width:7.5208in;height:.0937in" id="Picture_x0020_1" src="cid:image001.png@01D24A22.A6AFFAA0"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#3A7A46">Nick Caton, P.E., BEMP</span></b><span style="color:#3A7A46"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#626469"> Senior Energy Engineer</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#1F497D"><br>
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