Keith,<div><br></div><div>Thank you very much for replying this.</div><div><br></div><div>I've actually did some investigate into this issue and had some ideas about possible solutions and, I thought it could because that Evaporative Cooler runs even during heating season, but since I have the same setting of cooling & fan schedule for DX Coil or Chilled Water Cooling, why would EVP Cooler have this problem? And which input represents the humidity control of EVP Cooler? I wonder which input could determine the set point between cooling and heating season? Or, I should basically create separated seasons for the cooling,heating & fan schedule? I guess it would be unreliable.</div>
<div><br></div><div>Thank you Again for your help!</div><div><br></div><div>Best,</div><div><br></div><div>Yitian</div><div><br></div><div>Energy Analyst </div><div>Efficiency 2.0</div><div><br><div class="gmail_quote">On Mon, Jan 9, 2012 at 12:47 PM, Keith Swartz <span dir="ltr"><<a href="mailto:kswartz@ecw.org">kswartz@ecw.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Yitian,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Is the evaporative cooler also controlling the humidity during the heating season? If so, that might explain it. More heating would be needed to compensate for the cooling effect of adding cold moisture to the airstream.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">________________________________</span><span style="color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u><span style="color:#1f497d">Keith Swartz</span><u></u><span style="color:#1f497d">, P.E., LEED AP</span></span><span style="color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><br>Energy Engineer / Senior Project Manager<br></span><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u><span style="color:#1f497d">Energy</span><u></u><span style="color:#1f497d"> </span><u></u><span style="color:#1f497d">Center</span><u></u><span style="color:#1f497d"> of </span><u></u><u></u><span style="color:#1f497d">Wisconsin</span><span style="color:#1f497d;font-weight:normal"><br>
</span><span style="font-weight:normal"><u></u></span><u></u></span></b><u></u><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u><span style="color:#1f497d">455 Science Drive, Suite 200, </span><u></u><u></u></span><u></u><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u><span style="color:#1f497d">Madison</span><u></u><span style="color:#1f497d">, </span><u></u><span style="color:#1f497d">WI</span><u></u><span style="color:#1f497d"> </span><u></u><span style="color:#1f497d">53711<br>
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<div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Yitian Zhu [mailto:<a href="mailto:yitian@efficiency20.com" target="_blank">yitian@efficiency20.com</a>] <br>
<b>Sent:</b> Friday, January 06, 2012 4:01 PM<br><b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> [Equest-users] why more heating usage with evaporative cooler<u></u><u></u></span></p>
</div><div><div class="h5"><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Hi,<u></u><u></u></p><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">I'm new to eQuest, recently I'm modeling a office building with evaporative cooler, I did a sample test and found out that, for the same building, significantly more heating is consumed with the model using evaporative cooler than others using DX coil or chilled water cooler. Does anybody noticed that and, why is that?<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Great thanks!<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Yitian<u></u><u></u></p>
</div></div></div></div></div></blockquote></div><br></div>