<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>Joey:</span></div><div><br><span></span></div><div><span>I am guessing, but I BELIEVE Chiller-1 gets to a certain load (think it's defined in the chiller setup), then Chiller-1 and Chiller-2 share the load until Chiller-3 is needed, when all three share the load.</span></div><div><br><span></span></div><div><span>See if that makes sense.</span></div><div><br><span></span></div><div><span>John Aulbach</span></div><div><span>Partner Energy</span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> "Jiao, Joey" <Joey.Jiao@WSPGroup.com.cn><br> <b><span
style="font-weight: bold;">To:</span></b> Equest-users@lists.onebuilding.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, March 21, 2012 7:49 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> [Equest-users] what's the default equipment control?<br> </font> </div> <br><div id="yiv34391415"><style><!--
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--></style><div><div class="yiv34391415WordSection1"><div class="yiv34391415MsoNormal">Hi, everyone:</div><div class="yiv34391415MsoNormal">What’s the default equipment control when a loop with more than 1 plant?</div><div class="yiv34391415MsoNormal">At first I think the default should be” chiller1a- sequence 1, chiller 2a-sequence2, …” or all the chillers with the same sequence 1.</div><div class="yiv34391415MsoNormal">But my experiment shows it different than my think . </div><div class="yiv34391415MsoNormal"> I make a system with 3 chiller and make a calculation under different control way.</div><div class="yiv34391415MsoNormal">The result run hour shows below:</div><table class="yiv34391415MsoTableColorfulGridAccent2" style="border-collapse:collapse;border:none;" border="1" cellpadding="0" cellspacing="0"><tbody><tr><td style="width:110.7pt;border:solid windowtext 1.0pt;background:#E5B8B7;padding:0cm 5.4pt 0cm 5.4pt;" valign="top"
width="148"><div class="yiv34391415MsoNormal"><b><span style="color:#C7EDCC;">Equipment control</span></b></div></td><td style="width:110.7pt;border:solid windowtext 1.0pt;border-left:none;background:#E5B8B7;padding:0cm 5.4pt 0cm 5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><b><span style="color:black;">Chiller 1a</span></b></div></td><td style="width:110.7pt;border:solid windowtext 1.0pt;border-left:none;background:#E5B8B7;padding:0cm 5.4pt 0cm 5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><b><span style="color:black;">Chiller 1b</span></b></div></td><td style="width:110.7pt;border:solid windowtext 1.0pt;border-left:none;background:#E5B8B7;padding:0cm 5.4pt 0cm 5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><b><span style="color:black;">Chiller 1c</span></b></div></td></tr><tr><td style="width:110.7pt;border:solid windowtext 1.0pt;border-top:none;background:#943634;padding:0cm 5.4pt 0cm
5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><span style="color:#C7EDCC;">None</span></div></td><td style="width:110.7pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:#DFA7A6;padding:0cm 5.4pt 0cm 5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal">2126</div></td><td style="width:110.7pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:#DFA7A6;padding:0cm 5.4pt 0cm 5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal">624</div></td><td style="width:110.7pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:#DFA7A6;padding:0cm 5.4pt 0cm 5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal">607</div></td></tr><tr><td style="width:110.7pt;border:solid windowtext
1.0pt;border-top:none;background:#943634;padding:0cm 5.4pt 0cm 5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><span style="color:#C7EDCC;">Chiller1~3 to seq 1~3</span></div></td><td style="width:110.7pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:#F2DBDB;padding:0cm 5.4pt 0cm 5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><span style="color:black;">2750</span></div></td><td style="width:110.7pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:#F2DBDB;padding:0cm 5.4pt 0cm 5.4pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><span style="color:black;">607</span></div></td><td style="width:110.7pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:#F2DBDB;padding:0cm 5.4pt 0cm 5.4pt;" valign="top"
width="148"><div class="yiv34391415MsoNormal"><span style="color:black;">0</span></div></td></tr><tr style="height:3.5pt;"><td style="width:110.7pt;border:solid windowtext 1.0pt;border-top:none;background:#943634;padding:0cm 5.4pt 0cm 5.4pt;height:3.5pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><span style="color:#C7EDCC;">All Chillers seq 1</span></div></td><td style="width:110.7pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:#DFA7A6;padding:0cm 5.4pt 0cm 5.4pt;height:3.5pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><span style="color:black;">2750</span></div></td><td style="width:110.7pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:#DFA7A6;padding:0cm 5.4pt 0cm 5.4pt;height:3.5pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><span
style="color:black;">2750</span></div></td><td style="width:110.7pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;background:#DFA7A6;padding:0cm 5.4pt 0cm 5.4pt;height:3.5pt;" valign="top" width="148"><div class="yiv34391415MsoNormal"><span style="color:black;">2750</span></div></td></tr></tbody></table><div class="yiv34391415MsoNormal">So I’m puzzled with how should the software control more than 1 plant when there is no equipment control set?</div><div class="yiv34391415MsoNormal"><img id="yiv34391415_x56fe__x7247__x0020_1" src="cid:1.3042652816@web126106.mail.ne1.yahoo.com" height="270" width="420"></div><div class="yiv34391415MsoNormal">Any suggestion should be appreciated.</div><div class="yiv34391415MsoNormal">Thank you very much. </div><div class="yiv34391415MsoNormal"> </div><div
class="yiv34391415MsoNormal">Joey</div></div></div></div><br>_______________________________________________<br>Equest-users mailing list<br><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>To unsubscribe from this mailing list send a blank message to <a ymailto="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG" href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><br><br><br> </div> </div> </div></body></html>