<div dir="ltr"><span style="font-size:12.8px">In general, a smaller approach means the cooling tower is more efficiently rejecting heat, i.e. better performance. This overview is pretty good: </span><a href="http://spxcooling.com/pdf/TR-016.pdf" target="_blank" style="font-size:12.8px">http://spxcooling.com/<wbr>pdf/TR-016.pdf</a><div dir="auto" style="font-size:12.8px"><br></div><div dir="auto" style="font-size:12.8px">Best,</div><div dir="auto" style="font-size:12.8px">Danielle</div><div class="gmail_extra"><br></div><div class="gmail_extra">-- <br><div class="gmail_signature"><div dir="ltr">Danielle Bond, Ph.D.<div>Energy Engineer, <span style="font-size:12.8px">eCap Network</span></div><div><a href="http://www.ecapnet.com/" target="_blank">http://www.ecapnet.com/</a></div><div><br></div><div><br></div></div></div><div class="gmail_quote">On Mon, Jun 19, 2017 at 11:50 AM, Dan Nall via Bldg-sim <span dir="ltr"><<a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-size:13px;color:rgb(0,0,0);font-family:arial,sans-serif">If you input a tower with a lower approach but with the same fan power, you would wind up with less annual fan energy consumption, because your fan with the lower approach temperature would hit the minimum condenser water temperature at a higher wet-bulb temperature, allowing the fan to back off more hours of the year. <br><br><blockquote style="padding-left:5px;margin-left:0px;border-left:2px solid rgb(0,0,255);font-weight:normal;font-style:normal;text-decoration:none;font-size:10pt;font-family:arial,sans-serif;color:black"><span class="gmail-">-----Original Message-----
<br>From: "Peters, Judith M via Bldg-sim" <u></u>
<br></span><span class="gmail-">Sent: Jun 19, 2017 11:13 AM
<br>To: "<a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.<wbr>org</a>" <u></u>
<br>Subject: [Bldg-sim] Cooling Tower Approach
<br><br><u></u><u></u><u></u><u></u><u></u><u></u>
<u></u>
<u></u><u></u><u></u><u></u><u></u>
<u></u>
<u></u>
<u></u><u></u><u></u><u></u><u></u><u></u><u></u><u></u><u></u><u></u><u></u><u></u></span><span class="gmail-"><div class="gmail-m_-1520170655819048656WordSection1"><p class="MsoNormal">I am looking for tips on how to properly compare tower approach temps. Currently, I am comparing a 7 F approach with a 5 F approach. The tower has 4 cells with 44 kW fan energy for each cell and a 10 F range. <u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Regardless of control parameters, the program shows less tower energy for a smaller approach and I was expecting the opposite.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Can anyone shed some light on this issue?<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Thank you!<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><b><span style="color:rgb(13,13,13)">Judy Peters, PE LEED-AP BEMP<u></u><u></u></span></b></p><p class="MsoNormal"><span style="color:rgb(13,13,13)">Energy Modeling Engineer<u></u><u></u></span></p><p class="MsoNormal"><b><span style="color:rgb(13,13,13)">Daikin Applied<u></u><u></u></span></b></p><p class="MsoNormal"><span style="color:rgb(13,13,13)"><a href="tel:(763)%20553-5155" value="+17635535155" target="_blank">763.553.5155</a><u></u><u></u></span></p><p class="MsoNormal"><u><span style="color:blue"><a href="mailto:judith.peters@daikinapplied.com" target="_blank"><span style="color:blue">judith.peters@daikinapplied.<wbr>com</span></a></span></u><span style="color:rgb(13,13,13)"> | <a href="http://www.daikinapplied.com/" target="_blank"><span style="color:blue">www.DaikinApplied.com</span></a><u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p></div><u></u><u></u><u></u><u></u></span></blockquote></div></div>
<br>______________________________<wbr>_________________<br>
Bldg-sim mailing list<br>
<a href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org" rel="noreferrer" target="_blank">http://lists.onebuilding.org/<wbr>listinfo.cgi/bldg-sim-<wbr>onebuilding.org</a><br>
To unsubscribe from this mailing list send a blank message to <a href="mailto:BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG">BLDG-SIM-UNSUBSCRIBE@<wbr>ONEBUILDING.ORG</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div><div class="gmail_signature"><div dir="ltr"><div><br></div></div></div>
</div></div>