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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Confirm whether you have two-way or three-way CHW valves.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#5F574F'>Paul Riemer, PE, LEED AP BD+C</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> <o:p></o:p></span></p><p class=MsoNormal><b><span style='font-family:"Verdana","sans-serif";color:#C4262E'>DUNHAM</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><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"'> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>John Aulbach<br><b>Sent:</b> Thursday, June 18, 2015 2:14 PM<br><b>To:</b> Mike Schaefer; equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] VFD Pumping<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=top style='padding:0in 0in 0in 0in'><p class=MsoNormal>Michael. can you send your .pd2 and .inp for us to check youtvinputd, please?<o:p></o:p></p><div id="yMail_cursorElementTracker_0.03272334043867886"><p class=MsoNormal><o:p> </o:p></p></div><div id="yMail_cursorElementTracker_0.03272334043867886"><p class=MsoNormal style='margin-bottom:12.0pt'>John R. Aulbach ,PE<o:p></o:p></p><p><a href="http://cp.mcafee.com/d/FZsScz8wrhoposvououdTdEIKenvKUrjvvuKYYUrjvvuKYYYrpsKUPuX9JrmP-zbRvy2A6U4Zl-17BPq3s2uG_0zOVJQsYyOY-_R-vsv7cIZuVtddUQsYyyeuhv7sJt6OaqGabfaxVZicHs3jq9J4TvAm4TDNOb2pEVdTdAVPmEBClc_4PbP72v5J9RHO-aR8if_2nkzoUgwx6IA3vyPvQCnrFYq5O5mUm-wafBiteH3O3szQ9g8Y01dCzCXMUS2_id41Fr6xpLWjbJQ-d3iWq80ObxNEw2PqGQE4jrdPra_F">Sent from Yahoo Mail on Android</a><o:p></o:p></p><div class=MsoNormal align=center style='text-align:center'><hr size=2 width="100%" align=center></div><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=top style='padding:0in 0in 0in 0in'><div><p class=MsoNormal style='margin-bottom:12.0pt'><b>From</b>:"Mike Schaefer" <<a href="mailto:mikedschaefer@hotmail.com">mikedschaefer@hotmail.com</a>><br><b>Date</b>:Thu, Jun 18, 2015 at 11:49 AM<br><b>Subject</b>:[Equest-users] VFD Pumping<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I’ve performing an energy model to compare VFD Chiller pumping and Constant Volume Chiller pumping for a multi-story office building using eQUEST v 3.65. Although I expect to save pump energy utilizing VFD pumping I’m not seeing a savings and I believe this is due to my “Pump Properties Inputs”.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>For both the VFD and constant volume pump scenarios I’ve input the scheduled pump flow (1,300 gpm) and head (200 ft) and the other pump inputs are default values. The energy difference between the two pumping scenarios is negligible, however, if I set the pump gpm to a default, which inputs a 1.00 Flow Ratio, the energy savings is significant in the VFD pumping model. <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Am I over defining the pumps by inputting the scheduled pump gpm? Should the pump gpm always be set to default?<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks,<o:p></o:p></p><p class=MsoNormal><br><br><strong><span style='font-family:"Arial","sans-serif"'>Michael</span></strong><br> <o:p></o:p></p></div></td></tr></table></div></td></tr></table><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div></body></html>