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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Jamie:<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"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Aside from ongoing advice by others, I’ve had a chance to give the most recent set of models a scan.<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"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I notice you have a relatively large amount of exterior lighting. I also notice your proposed and baseline installed wattage and scheduling are
<u>identical</u>. Think that through <u>carefully</u>! If you didn’t do the electrical/lighting/associated controls for the project yourself, reigning that individual into the brainstorm may be productive. My LEED models rarely feature identical exterior
lighting consumptions, and in your particular case this is likely low hanging fruit to improve your modeled performance towards your target. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><br>
More low fruit: I also notice your process loads are eerily close to the ubiquitous 25% mark… I hope that’s coincidence! Consider your sources carefully and whether your inputs are appropriate for an energy model (vs. sizing equipment). Following recommended
plug load densities in the 90.1 Users Manual (0.75W/SF for office buildings), I experimentally find your misc. equip. annual consumption drops about 7MWh – this would mirror for both models and in turn amplify the differences/improvements of all other systems.
A quick visual check confirms using the prescribed receptacle usage schedule from the same source will net you further trimming in this department.
<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"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">To the most recent query about gas costs: All things being equal (and perhaps they shouldn’t be), I see the proposed isn’t consuming a great magnitude of extra
gas, and this can be normal. For this scale of project, you might well explain the additional proposed consumptions entirely by the difference in lighting LPD contributions for internals during the winter months. I would advise not getting too hung up on
this fact, but if you want to feel confident I’d advise checking your heating efficiencies are correctly entered for both models and that the rates are identical.<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"><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"><img width="611" height="513" id="Picture_x0020_7" src="cid:image001.png@01CD4599.CA174D50"></span><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"><img width="611" height="513" id="Picture_x0020_39" src="cid:image002.png@01CD4599.CA174D50"></span><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>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img width="119" height="37" id="_x0000_i1031" src="cid:image006.jpg@01CD4599.CA174D50" alt="cid:489575314@22072009-0ABB"></span><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Stylus BT","sans-serif";color:#2D4D5E">NICK CATON, P.E.</span></b><b><span style="font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900">SENIOR ENGINEER<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">Smith & Boucher Engineers</span><span style="font-size:7.5pt;color:#CC9900"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">25501 west valley parkway, suite 200<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">olathe, ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">direct 913.344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">fax 913.345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span style="font-size:10.0pt">www.smithboucher.com</span></a></span><u><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue">
</span></u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<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-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Armstrong, Jamie<br>
<b>Sent:</b> Friday, June 08, 2012 8:14 AM<br>
<b>To:</b> Umesh Atre; Howe, Timothy; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Can't get unmet hours under control for cooling<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’ve finally got the unmet hours under control but my heating costs are more in my design than my baseline. I’m shooting for 24% increase in efficiency and
I’m at 4 now.<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"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">My design system is a PSZ with natural gas heat.
<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>
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<p class="MsoNormal"><b><span style="font-family:"Verdana","sans-serif";color:#404040">Jamie Armstrong
</span></b><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#404040">P.E.</span><b><span style="font-family:"Verdana","sans-serif";color:#404040"><br>
</span></b><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#404040">Mechanical Engineer<br>
<br>
<img border="0" width="264" height="53" id="Picture_x0020_1" src="cid:image007.jpg@01CD4599.CA174D50" alt="Description: Description: image001"><br>
<br>
v. 210.546.0200 | <a href="http://www.dbrinc.com">www.dbrinc.com</a></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#404040"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<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""> Umesh Atre [<a href="mailto:umesh@innovativedesign.net">mailto:umesh@innovativedesign.net</a>]
<br>
<b>Sent:</b> Friday, June 08, 2012 8:00 AM<br>
<b>To:</b> Armstrong, Jamie; Howe, Timothy; <a href="mailto:equest-users@lists.onebuilding.org">
equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> RE: [Equest-users] Can't get unmet hours under control for cooling<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:blue">Jamie,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:blue">Is there a reason you have all the plenum spaces on their own separate system with indoor design temperatures similar to your conditioned zones?</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><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"">
<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Armstrong, Jamie<br>
<b>Sent:</b> Thursday, June 07, 2012 6:20 PM<br>
<b>To:</b> Howe, Timothy; <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Can't get unmet hours under control for cooling</span><o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">In regards to OA for PSZ RTU’s.
<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">When allowing eQuest to autosize the airflow to each space if you set a ratio of OA to supply air whatever eQuest calculates the supply air needed for that space will vary the outside
airflow.<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">If I enter the OA at the zone level to each space how do you set up a schedule for the OA? Based on Timothy’s answer I would need a different schedule for each RTU with its ratio
of OA to supply air. I wanted the MinOA schedule to be an on/off flag to deliver the OA that I put in at the zone level according to the occupied schedule.<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"><o:p> </o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>Jamie Armstrong
</b>P.E.<b><br>
</b>Mechanical Engineer<br>
<br>
<img border="0" width="264" height="53" id="_x0000_i1027" src="cid:image007.jpg@01CD4599.CA174D50" alt="Description: Description: image001"><br>
<br>
v. 210.546.0200 | <a href="http://www.dbrinc.com">www.dbrinc.com</a><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b> Howe, Timothy [<a href="mailto:Timothy.Howe@stantec.com">mailto:Timothy.Howe@stantec.com</a>]
<br>
<b>Sent:</b> Thursday, June 07, 2012 3:51 PM<br>
<b>To:</b> Armstrong, Jamie; <a href="mailto:equest-users@lists.onebuilding.org">
equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> RE: Can't get unmet hours under control for cooling<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Jamie,<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">You have some inconsistencies in your inputs for the OA on system RTU-2 (and all the rest). See highlighted area below. You are saying that the system is 100% recirc by setting
the Minimum Outside Air ratio to 0.00, but your Minimum Air Schedule (note that this is a fraction of the design supply CFM type of input) is saying otherwise and takes precedence causing it to be a 100% OA system. See my snip from the hourly reports below
too. You need to develop the proper ventilation rates for each system and verify with hourly reports. Do not rely on the summary tab in the air side system tab of eQUEST to give you correct data at all times. If you just define the OA by using the Minimum
Outside Air ratio, you will be supplying OA every time the fan operates. To prevent this you need to set up Minimum Air Schedule for each system which is based upon the proper fractions for that system.
<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"><img border="0" width="531" height="448" id="_x0000_i1028" src="cid:image008.png@01CD4599.CA174D50"><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"><o:p> </o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><img border="0" width="1024" height="661" id="_x0000_i1029" src="cid:image009.png@01CD4599.CA174D50"><o:p></o:p></p>
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<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"><o:p> </o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
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<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>Timothy Howe, MS, LEED® AP BD+C</b><br>
Mechanical Engineer<br>
Stantec<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">61 Commercial Street<br>
Rochester NY 14614<br>
Ph: (585) 413-5347<br>
Fx: (585) 272-1814<br>
Cell: (585) 330-8681<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a href="http://www.stantec.com"><b>stantec</b>.com</a>
<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The content of this email is the confidential property of Stantec and should not be copied, modified, retransmitted, or used for any purpose except with Stantec's written authorization.
If you are not the intended recipient, please delete all copies and notify us immediately.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">ü Please consider the environment before printing this email.
<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b>
<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Armstrong, Jamie<br>
<b>Sent:</b> Thursday, June 07, 2012 4:23 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Can't get unmet hours under control for cooling<o:p></o:p></p>
</div>
</div>
<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">I need some help getting these cooling unmet hours under control. I have to get this model complete and submitted by tonight.<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">We’ve tried multiple things to try to get the model to work out.
<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">We’ve tried the following:<o:p></o:p></p>
<p class="MsoListParagraph">· Letting eQuest autosize the heating and cooling for the PSZ units<o:p></o:p></p>
<p class="MsoListParagraph">· Verified that the schedules are consistent with both cooling, heating, and occupancy.<o:p></o:p></p>
<p class="MsoListParagraph">· On the baseline building we have the min cfm set to 0.5 for most spaces and 1 cfm/sf for some of the larger spaces.<o:p></o:p></p>
<p class="MsoListParagraph">· We set the PSZ –fan – flow parameter – indoor fan mode to intermittent to get the unit to show partial capacity thru out the days.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">One item is RTU-2 in my model. It serves only one space. We have a high amount of unmet hours on this and we are letting it auto size the capacity and airflow and it still says
its not staying under control. We’re assuming that we are missing one small check box that’s somehow causing these unmet hours.<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">I’ve attached the pd2 files for both baseline and proposed along with weather data and inp files.<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 in advance for any help!<o:p></o:p></p>
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<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"><b>Jamie Armstrong
</b>P.E.<b><br>
</b>Mechanical Engineer<br>
<br>
<img border="0" width="264" height="53" id="_x0000_i1030" src="cid:image007.jpg@01CD4599.CA174D50" alt="Description: Description: image001"><br>
<br>
v. 210.546.0200 | <a href="http://www.dbrinc.com">www.dbrinc.com</a><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
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