<html><head></head><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1446950183103_3926" dir="ltr"><span id="yui_3_16_0_1_1446950183103_3925">As always Nick, you are the "straw that stirs the eQuest drink (Reggie, Reggie !!). But remember one thing..I have no chiller, just a massive water cooled package unit. And this is Los Angeles..</span></div> <br><div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: verdana, helvetica, sans-serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"> <font size="2" face="Arial"> On Saturday, November 7, 2015 5:43 PM, Nicholas Caton <ncaton@catonenergy.com> wrote:<br> </font> </div> <br><br> <div class="y_msg_container"><div id="yiv8318395501"><style>#yiv8318395501 #yiv8318395501 --
_filtered #yiv8318395501 {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;}
_filtered #yiv8318395501 {panose-1:2 2 6 9 4 2 5 8 3 4;}
_filtered #yiv8318395501 {font-family:SimSun;panose-1:2 1 6 0 3 1 1 1 1 1;}
_filtered #yiv8318395501 {panose-1:2 4 5 3 5 4 6 3 2 4;}
_filtered #yiv8318395501 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}
_filtered #yiv8318395501 {font-family:Verdana;panose-1:2 11 6 4 3 5 4 4 2 4;}
_filtered #yiv8318395501 {panose-1:2 2 6 9 4 2 5 8 3 4;}
_filtered #yiv8318395501 {panose-1:2 1 6 0 3 1 1 1 1 1;}
#yiv8318395501
#yiv8318395501 p.yiv8318395501MsoNormal, #yiv8318395501 li.yiv8318395501MsoNormal, #yiv8318395501 div.yiv8318395501MsoNormal
{margin:0in;margin-bottom:.0001pt;font-size:12.0pt;}
#yiv8318395501 a:link, #yiv8318395501 span.yiv8318395501MsoHyperlink
{color:blue;text-decoration:underline;}
#yiv8318395501 a:visited, #yiv8318395501 span.yiv8318395501MsoHyperlinkFollowed
{color:purple;text-decoration:underline;}
#yiv8318395501 p.yiv8318395501MsoListParagraph, #yiv8318395501 li.yiv8318395501MsoListParagraph, #yiv8318395501 div.yiv8318395501MsoListParagraph
{margin-top:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt;font-size:12.0pt;font-family:SimSun;}
#yiv8318395501 p.yiv8318395501msobodytext, #yiv8318395501 li.yiv8318395501msobodytext, #yiv8318395501 div.yiv8318395501msobodytext
{margin-right:0in;margin-left:0in;font-size:12.0pt;}
#yiv8318395501 p.yiv8318395501msonormal, #yiv8318395501 li.yiv8318395501msonormal, #yiv8318395501 div.yiv8318395501msonormal
{margin-right:0in;margin-left:0in;font-size:12.0pt;}
#yiv8318395501 span.yiv8318395501msohyperlink
{}
#yiv8318395501 span.yiv8318395501msohyperlinkfollowed
{}
#yiv8318395501 span.yiv8318395501emailstyle17
{}
#yiv8318395501 span.yiv8318395501emailstyle18
{}
#yiv8318395501 p.yiv8318395501msonormal1, #yiv8318395501 li.yiv8318395501msonormal1, #yiv8318395501 div.yiv8318395501msonormal1
{margin:0in;margin-bottom:.0001pt;font-size:12.0pt;}
#yiv8318395501 p.yiv8318395501msobodytext1, #yiv8318395501 li.yiv8318395501msobodytext1, #yiv8318395501 div.yiv8318395501msobodytext1
{margin-right:0in;margin-left:0in;font-size:12.0pt;}
#yiv8318395501 span.yiv8318395501msohyperlink1
{color:blue;text-decoration:underline;}
#yiv8318395501 span.yiv8318395501msohyperlinkfollowed1
{color:purple;text-decoration:underline;}
#yiv8318395501 span.yiv8318395501emailstyle171
{color:#1F497D;}
#yiv8318395501 span.yiv8318395501emailstyle181
{color:windowtext;}
#yiv8318395501 span.yiv8318395501d2hbreadcrumbslinkseparator
{}
#yiv8318395501 span.yiv8318395501EmailStyle30
{color:#002060;}
#yiv8318395501 .yiv8318395501MsoChpDefault
{font-size:10.0pt;}
_filtered #yiv8318395501 {margin:1.0in 1.0in 1.0in 1.0in;}
#yiv8318395501 div.yiv8318395501WordSection1
{}
#yiv8318395501
_filtered #yiv8318395501 {}
_filtered #yiv8318395501 {}
_filtered #yiv8318395501 {}
_filtered #yiv8318395501 {}
_filtered #yiv8318395501 {}
_filtered #yiv8318395501 {}
_filtered #yiv8318395501 {}
_filtered #yiv8318395501 {}
_filtered #yiv8318395501 {}
_filtered #yiv8318395501 {}
#yiv8318395501 ol
{margin-bottom:0in;}
#yiv8318395501 ul
{margin-bottom:0in;}
#yiv8318395501 </style><div><div class="yiv8318395501WordSection1"><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;">Hi John,</span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;"> </span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;">I haven’t opened/picked apart your model, but some time ago I provided the following outline to this mailing list for a procedure to consider:</span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;"> </span></div><div class="yiv8318395501MsoNormal" style="margin-left:.5in;"><i><span style="font-size:11.0pt;">Hi Nikola, good to hear from you!</span></i></div><div class="yiv8318395501MsoNormal" style="margin-left:.5in;"><i><span style="font-size:11.0pt;"> </span></i></div><div class="yiv8318395501MsoNormal" style="margin-left:.5in;"><i><span style="font-size:11.0pt;">An approach I like to start with (sometimes this is a rough approximation, other times it is very accurate & appropriate), is:</span></i></div><div class="yiv8318395501MsoListParagraph" style="margin-left:1.0in;"><i><span style="font-size:11.0pt;"><span style="">1.<span style="font:7.0pt;"> </span></span></span></i><i><span style="font-size:11.0pt;">Establish an outside temperature at and below which the waterside economizer is designed to handle the building’s cooling loads (or largely so)</span></i></div><div class="yiv8318395501MsoListParagraph" style="margin-left:1.0in;"><i><span style="font-size:11.0pt;"><span style="">2.<span style="font:7.0pt;"> </span></span></span></i><i><span style="font-size:11.0pt;">Create a “free cooling” chiller with an EIR a hair above zero (something like 0.0000001), attach it to the CHW loop(s) servicing your coils, alongside the regular chiller(s)</span></i></div><div class="yiv8318395501MsoListParagraph" style="margin-left:1.0in;"><i><span style="font-size:11.0pt;"><span style="">3.<span style="font:7.0pt;"> </span></span></span></i><i><span style="font-size:11.0pt;">Create a pair of equipment control sequences: “Free” and “Normal”</span></i></div><div class="yiv8318395501MsoListParagraph" style="margin-left:1.5in;"><i><span style="font-size:11.0pt;"><span style="">a.<span style="font:7.0pt;"> </span></span></span></i><i><span style="font-size:11.0pt;">For the “Free” control sequence, assign the “free cooling chiller” in the first row to handle loads first. You may optionally also assign the actual chillers and associated capacity ranges for each.</span></i></div><div class="yiv8318395501MsoListParagraph" style="margin-left:1.5in;"><i><span style="font-size:11.0pt;"><span style="">b.<span style="font:7.0pt;"> </span></span></span></i><i><span style="font-size:11.0pt;">For the “Normal” control sequence, specify your normal chiller sequence of operations</span></i></div><div class="yiv8318395501MsoListParagraph" style="margin-left:1.0in;"><i><span style="font-size:11.0pt;"><span style="">4.<span style="font:7.0pt;"> </span></span></span></i><i><span style="font-size:11.0pt;">Then create a Load Management of type OA-TEMP. </span></i></div><div class="yiv8318395501MsoListParagraph" style="margin-left:1.5in;"><i><span style="font-size:11.0pt;"><span style="">a.<span style="font:7.0pt;"> </span></span></span></i><i><span style="font-size:11.0pt;">Set the outside air temperature below which free cooling is active under management sequence 1, and assign the free cooling control sequence defined in the previous step.</span></i></div><div class="yiv8318395501MsoListParagraph" style="margin-left:1.5in;"><i><span style="font-size:11.0pt;"><span style="">b.<span style="font:7.0pt;"> </span></span></span></i><i><span style="font-size:11.0pt;">Set management sequence 2 to a maximum OSA temp of 999, and assign the normal control sequence from the previous step</span></i></div><div class="yiv8318395501MsoNormal" style="margin-left:.5in;"><i><span style="font-size:11.0pt;"> </span></i></div><div class="yiv8318395501MsoNormal" style="margin-left:.5in;"><i><span style="font-size:11.0pt;">Integrating WSE into eQuest is one of those things I always plan on spending extra time on – the devil is in the details! I don’t believe waterside economizer systems are something you can make a simple rote procedure around, as actual waterside economizer system operations/limitations are varied and nuanced. Consider this a simple outline to convey the approach concept & get you started. I would particularly advise paying close attention to your pumping and heat rejection energies from this point forward.</span></i><i><span style="font-family:SimSun;"></span></i></div><div class="yiv8318395501MsoNormal" style="margin-left:.5in;"><i> </i></div><div class="yiv8318395501MsoNormal" style="margin-left:.5in;"><i><span style="font-size:11.0pt;">Hope that helps get you started - Happy new year!</span></i></div><div class="yiv8318395501MsoNormal" style="margin-left:.5in;"><i><span style="font-size:11.0pt;"> </span></i></div><div class="yiv8318395501MsoNormal" style="margin-left:.5in;"><i><span style="font-size:11.0pt;">~Nick</span></i><span style="font-size:11.0pt;"></span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;"> </span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;">I have simulated a number of different WSE arrangements since posting that, but still follow the same general outline/strategy. The sequencing part in particular is where the meat of the puzzle lies, project to project. You should be able (and I advise) to describe for yourself in writing exactly how the chiller(s) and free cooling operation should sequence with each other. Then go and translate that into a meaningful set of equipment control sequence inputs. I have found actually entering the “capacity” of free cooling at the chiller makes complicated sequencing a bit more manageable as an extra tip, but it may come down to just how your brain processes the problem what approach is easiest.</span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;"> </span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;">Best of luck!</span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;"> </span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;">~Nick</span></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;"> </span></div><div><div class="yiv8318395501MsoNormal"><b><span style="font-size:14.0pt;">NICK CATON, P.E.</span></b><span style="font-size:11.0pt;"><br clear="none"></span><b><span style="font-size:11.0pt;">Owner</span></b></div><div class="yiv8318395501MsoNormal"><b><span style="font-size:11.0pt;"> </span></b></div><div class="yiv8318395501MsoNormal"><b><span style="font-size:10.0pt;">Caton Energy Consulting</span></b><span style="font-size:10.0pt;"><br clear="none"></span><span style="font-size:10.0pt;"> 306 N Ferrel</span></div><div class="yiv8318395501MsoNormal"><span style="font-size:10.0pt;"> Olathe, KS 66061</span></div><div class="yiv8318395501MsoNormal"><span style="font-size:10.0pt;"> office: 785.410.3317</span></div><div class="yiv8318395501MsoNormal"><span style="font-size:10.0pt;"><a rel="nofollow" shape="rect" href=""><span style="color:#561782;">www.catonenergy.com</span></a></span><span style="font-size:11.0pt;"></span></div></div><div class="yiv8318395501MsoNormal"><span style="font-size:11.0pt;"> </span></div><div class="yiv8318395501yqt6781186088" id="yiv8318395501yqt89815"><div><div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in;"><div class="yiv8318395501MsoNormal"><b><span style="font-size:11.0pt;">From:</span></b><span style="font-size:11.0pt;"> Equest-users [mailto:<a rel="nofollow" shape="rect" ymailto="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank" href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>John Aulbach<br clear="none"><b>Sent:</b> Thursday, November 05, 2015 11:21 AM<br clear="none"><b>To:</b> Bishop, Bill; Julien Marrec<br clear="none"><b>Cc:</b> Equest-users<br clear="none"><b>Subject:</b> Re: [Equest-users] Water side economizer</span></div></div></div><div class="yiv8318395501MsoNormal"> </div><div><div id="yiv8318395501yui_3_16_0_1_1446743833961_5380"><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">Gentlemen:</span></div></div><div id="yiv8318395501yui_3_16_0_1_1446743833961_5380"><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div><div id="yiv8318395501yui_3_16_0_1_1446743833961_5380"><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">Here is the model. Pick away. I just don't think it makes sense in SoCal vs an air side.</span></div></div><div id="yiv8318395501yui_3_16_0_1_1446743833961_5380"><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div><div id="yiv8318395501yui_3_16_0_1_1446743833961_5380"><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">Please keep the client close to your vest. This building is on the site of the old Gene Autry studios.</span></div></div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div><div><div class="yiv8318395501MsoNormal" style="margin-bottom:12.0pt;background:white;"><span style=""> </span></div></div><div><div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:10.0pt;">On Thursday, November 5, 2015 8:39 AM, "Bishop, Bill" <<a rel="nofollow" shape="rect" ymailto="mailto:bbishop@pathfinder-ea.com" target="_blank" href="mailto:bbishop@pathfinder-ea.com">bbishop@pathfinder-ea.com</a>> wrote:</span><span style=""></span></div></div><div class="yiv8318395501MsoNormal" style="margin-bottom:12.0pt;background:white;"><span style=""> </span></div><div><div id="yiv8318395501"><div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;">John,</span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;">The energy savings for air handler water-side economizers (WSE) will largely depend on the pumping energy, as you note. These are different than the water-side economizers that are cooling towers for serving chilled water systems, allowing chiller(s) to turn off. </span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;">The default coil head is pretty high (20’) so override the default if appropriate to your design.</span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;"> </span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;"><img id="yiv8318395501_x005f_x0000_i1028" border="0" width="533" height="293" src="cid:image001.png@01D11993.EE900D80"></span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;"> </span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;">The DOE2.2 help menu description for WSE is in this section: </span><span style=""><span class="yiv8318395501MsoHyperlink">Volume 2: Dictionary</span><span class="yiv8318395501d2hbreadcrumbslinkseparator"> > </span><span class="yiv8318395501MsoHyperlink">HVAC Components</span><span class="yiv8318395501d2hbreadcrumbslinkseparator"> > </span><span class="yiv8318395501MsoHyperlink">SYSTEM</span><span class="yiv8318395501d2hbreadcrumbslinkseparator"> > </span><span class="yiv8318395501MsoHyperlink">Cooling Equipment</span></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;">Part of the description mentions operation to supplement (not entirely replace) the cooling coil and/or air-side economizer:</span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">The water-side economizer coil is assumed to be downstream of the mixed air plenum, and upstream of the cooling coil. As such, the cooling coil may supplement the operation of the water-side economizer. The air handler may also have a conventional outdoor-air economizer, in which case the outdoor-air economizer will operate first to meet the supply-air setpoint, then the water-side economizer will supplement the outdoor-air economizer, and the cooling coil will pick up the remaining load, if any. </span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;">Regards,</span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;">Bill</span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;"> </span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><b><span style="font-size:10.0pt;">William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP</span></b><span style=""></span></div></div><table class="yiv8318395501MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="526" style="width:394.8pt;border-collapse:collapse;"><tbody><tr style="height:13.45pt;"><td colspan="1" rowspan="1" width="345" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:13.45pt;"><div><div class="yiv8318395501MsoNormal" style="line-height:105%;"><b><span style="font-size:9.0pt;line-height:105%;">Senior Energy Engineer</span></b></div></div></td><td colspan="1" rowspan="6" width="182" style="width:136.35pt;padding:0in 5.4pt 0in 5.4pt;height:13.45pt;"><div><div class="yiv8318395501MsoNormal" style="line-height:105%;"><span style="font-size:9.0pt;line-height:105%;"><img id="yiv8318395501Picture_x0020_4" border="0" width="70" height="47" src="cid:image002.jpg@01D11993.EE900D80"> <img id="yiv8318395501Picture_x0020_2" border="0" width="57" height="49" src="cid:image003.jpg@01D11993.EE900D80"></span></div></div></td></tr><tr style="height:4.55pt;"><td colspan="1" rowspan="1" valign="top" width="345" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:4.55pt;"><div><div class="yiv8318395501MsoNormal" style="line-height:105%;"><span style="font-size:5.0pt;line-height:105%;"> </span></div></div></td></tr><tr style="height:9.8pt;"><td colspan="1" nowrap="rowspan="1"" valign="bottom" width="345" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:9.8pt;"><div><div class="yiv8318395501MsoNormal" style="line-height:105%;"><span style="font-size:9.0pt;line-height:105%;">134 South Fitzhugh Street Rochester, NY 14608</span></div></div></td></tr><tr style="height:12.4pt;"><td colspan="1" rowspan="1" valign="top" width="345" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:12.4pt;"><div><div class="yiv8318395501MsoNormal" style="line-height:105%;"><b><i><span style="font-size:9.0pt;line-height:105%;">T: (585) 698-1956</span></i></b><b><i><span style="font-size:11.0pt;line-height:105%;"> </span></i></b><span style="font-size:11.0pt;line-height:105%;"> </span><span style="font-size:9.0pt;line-height:105%;">F: (585) 325-6005</span></div></div></td></tr><tr style="height:9.8pt;"><td colspan="1" rowspan="1" valign="top" width="345" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:9.8pt;"><div><div class="yiv8318395501MsoNormal" style="line-height:105%;"><span style="font-size:11.0pt;line-height:105%;"><a rel="nofollow" shape="rect" ymailto="mailto:wbishop@pathfinder-ea.com" target="_blank" href="mailto:wbishop@pathfinder-ea.com"><span style="font-size:9.0pt;line-height:105%;">bbishop@pathfinder-ea.com</span></a></span><span style="font-size:9.0pt;line-height:105%;"> </span><span style="font-size:11.0pt;line-height:105%;"><a rel="nofollow" shape="rect" target="_blank" href="http://www.pathfinder-ea.com/"><span style="font-size:9.0pt;line-height:105%;">www.pathfinder-ea.com</span></a></span></div></div></td></tr><tr style="height:24.6pt;"><td colspan="1" rowspan="1" valign="top" width="345" style="width:258.45pt;padding:0in 5.4pt 0in 5.4pt;height:24.6pt;"><div style="margin-top:3.0pt;"><div class="yiv8318395501MsoNormal" style="line-height:105%;"><span style="font-size:11.0pt;line-height:105%;"><img id="yiv8318395501Picture_x0020_5" border="0" width="42" height="40" src="cid:image004.png@01D11993.EE900D80" alt="http://png-5.findicons.com/files/icons/977/rrze/720/globe.png"></span><span style="font-size:7.5pt;line-height:105%;">Carbon Fee and Dividend - simple, effective, and market-based.</span></div></div></td></tr></tbody></table><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="font-size:11.0pt;"> </span><span style=""></span></div></div><div id="yiv8318395501yqt33026"><div><div class="yiv8318395501MsoNormal" style="background:white;"><b><span style="font-size:11.0pt;">From:</span></b><span style="font-size:11.0pt;"> Equest-users [<a rel="nofollow" shape="rect" ymailto="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank" href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Julien Marrec<br clear="none"><b>Sent:</b> Thursday, November 05, 2015 11:17 AM<br clear="none"><b>To:</b> John Aulbach <<a rel="nofollow" shape="rect" ymailto="mailto:jra_sac@yahoo.com" target="_blank" href="mailto:jra_sac@yahoo.com">jra_sac@yahoo.com</a>><br clear="none"><b>Cc:</b> Equest-users <<a rel="nofollow" shape="rect" ymailto="mailto:equest-users@lists.onebuilding.org" target="_blank" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br clear="none"><b>Subject:</b> Re: [Equest-users] Water side economizer</span><span style=""></span></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div><div><div><div><div style="margin-bottom:12.0pt;"><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">John,</span></div></div></div><div><div style="margin-bottom:12.0pt;"><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">Never did a waterside economizer for RTUs, but a couple of points I think I remember:</span></div></div></div><div style="margin-bottom:12.0pt;"><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">The waterside economizer in eQuest is all or nothing: if it can satisfy the entire load, then it's on, otherwise it's off. Are you autosizing or hardsizing it?</span></div></div></div><div style="margin-bottom:12.0pt;"><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">It also poses the questions of how you reset the condenser water loop temperature, and how you reset the rooftop supply air temperature during low load condition.</span></div></div></div><div style="margin-bottom:12.0pt;"><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">What are your current settings?</span></div></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">Julien</span></div></div><div><div><div style="margin-bottom:12.0pt;"><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div></div></div></div><div><div id="yiv8318395501yqt92255"><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""><br clear="all"></span></div></div><div><div><div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">--<br clear="none">Julien Marrec, EBCP, BPI MFBA<br clear="none">Energy&Sustainability Engineer<br clear="none">T: +33 6 95 14 42 13<br clear="none"><br clear="none">LinkedIn (en) : <a rel="nofollow" shape="rect" target="_blank" href="http://www.linkedin.com/in/julienmarrec">www.linkedin.com/in/julienmarrec</a><br clear="none">LinkedIn (fr) : <a rel="nofollow" shape="rect" target="_blank" href="http://www.linkedin.com/in/julienmarrec/fr">www.linkedin.com/in/julienmarrec/fr</a></span></div></div></div></div></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">2015-11-05 15:11 GMT+01:00 John Aulbach <<a rel="nofollow" shape="rect" ymailto="mailto:jra_sac@yahoo.com" target="_blank" href="mailto:jra_sac@yahoo.com">jra_sac@yahoo.com</a>>:</span></div></div><blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;"><div><div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">Hello all and HALP !!</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">I have an office building in Los Angeles that is looking to go LEED Core and Shell. It has some exterior and back of the house lighting, so the savings there make sense. But the building has 6 DX 30-50 ton Trane rooftop package units, two on the 1st floor and one for each of the other 4 floors. These are WATER COOLED units.</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">These units have a central outside air stream, and have WATER SIDE ECONOMIZERS.</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">My Base model has an air side economizer (still water cooled condensers). The proposed model removes the air side and replaces it with the water side.</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">The units themselves are EER 14+, whereas the Base units are 10.8 EER.</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">Results show a SLIGHT savings in Space Cooling, which I attribute to the EER improvement MINUS the air side economizer removal (Jan and Dec space cooling load INCREASES in the Proposed Case).</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">But the pumping energy skyrockets about 50% (remember, no chilled water).</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">I am unsure if I am running the water side correctly. There is only the one line of data at ever SYSTEM level.</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">Help??</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">John R. Aulbach</span></div></div></div><div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style="">Aging engineer (by the minute)</span></div></div></div></div></div><div style="margin-bottom:12.0pt;"><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""><br clear="none">_______________________________________________<br clear="none">Equest-users mailing list<br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br clear="none">To unsubscribe from this mailing list send a blank message to <a rel="nofollow" shape="rect" ymailto="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG" target="_blank" href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a></span></div></div></blockquote></div></div><div><div class="yiv8318395501MsoNormal" style="background:white;"><span style=""> </span></div></div></div></div></div></div><div class="yiv8318395501MsoNormal" style="margin-bottom:12.0pt;background:white;"><span style=""> </span></div></div></div></div></div></div></div></div></div></div><br><br></div> </div> </div> </div></div></body></html>