<div dir="ltr">Hi Ed,<div><br></div><div>It looks like you also put "Shell Multiplier" as 3 in your first shell and some of the shells. Since you already have 3 above grade floors, I presume you are not going to create 3 same shells. I restore all shell multiplier to default value 1. See attached fig. The the area is now correct around 24209 sf. </div>
<div><br></div><div>Cheers.</div><div><br></div><div>Roger </div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Sep 24, 2013 at 1:02 PM, <span dir="ltr"><<a href="mailto:equest-users-request@lists.onebuilding.org" target="_blank">equest-users-request@lists.onebuilding.org</a>></span> wrote:<br>
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<br>Today's Topics:<br>
<br>
1. Building Model appears correct in 3D view, but incorrect<br>
square footage in reports. (Ed Mahler)<br>
2. Re: Building Model appears correct in 3D view, but incorrect<br>
square footage in reports. (Robert Stephenson)<br>
3. Heat pump COP curves (Madjid Madjidi)<br>
4. Heating energy backwards (jacob goodman)<br>
5. Re: Heating energy backwards (Robby Oylear)<br>
6. Re: Heating energy backwards (R B)<br>
7. IES VE training - Philadelphia (Nathan Kegel)<br>
8. Re: Heat pump COP curves (Bishop, Bill)<br>
<br><br>---------- Forwarded message ----------<br>From: Ed Mahler <<a href="mailto:emahler@hughesae.com">emahler@hughesae.com</a>><br>To: "<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
Cc: <br>Date: Mon, 23 Sep 2013 20:17:47 +0000<br>Subject: [Equest-users] Building Model appears correct in 3D view, but incorrect square footage in reports.<br>
<div lang="EN-US" link="blue" vlink="purple">
<div>
<p class="MsoNormal">Equest Users:<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Anyone had a similar experience. This file gets errors related to a drawing file reference when you initiate. However, this file appears to be modeling correctly in 3d view. Originally imported drawing with intent to trace and build model
from drawing. The drawing still seems to be linked, but used direct entry method instead for 3D modeling.
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Is there an easy way to keep equest from looking for the once imported drawing. I have attached the zipped file for your use in helping me resolve this issue. This may or may not be what is causing the incorrect square footage on the
reports. However, the square footage appears to be about twice what it should rightly be. (It should be about 23,240 sq. ft instead of 43,394 sq. ft per output report).
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks for your kind assistance. <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Ed Mahler, PE,CEM</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Engineer</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:red">Hughes Associates Architects and Engineers</span></b><u><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></u></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:gray">Architecture</span></i><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">
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</span></i><i><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:gray">Consulting</span></i><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">P.O. Box 1034, Roanoke, VA 24005-1034</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">656 Elm Avenue, SW, Roanoke, VA 24016</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Phone: <a href="tel:540.342.4002" value="+15403424002" target="_blank">540.342.4002</a></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">
</span><span style="font-size:10.0pt;font-family:Wingdings;color:red">n</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Fax: <a href="tel:540.342.2060" value="+15403422060" target="_blank">540.342.2060</a></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><a href="http://www.HughesAE.com" target="_blank"><span style="color:blue">www.HughesAE.com</span></a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> <u></u><u></u></span></p>
<p class="MsoNormal"><b><u><span style="font-size:12.0pt;font-family:"ClassGarmnd BT","serif";color:green"><a href="http://www.usgbc.com/" title="http://www.usgbc.com/" target="_blank"><span style="color:green">U.S. Green Building Council Member</span></a></span></u></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:green"><u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:18.0pt;font-family:Webdings;color:green">P</span></b><b><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">
</span></b><b><span style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:green">please conserve, do not print this e-mail unless necessary</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><i><span style="font-size:12.0pt;font-family:"Arial Black","sans-serif";color:maroon">"Tell me and I will forget. Show me and I may remember. Involve me and I will understand." Ben Franklin
<u></u><u></u></span></i></p>
<p class="MsoNormal"><i><span style="font-size:13.5pt;font-family:"Arial Black","sans-serif";color:green"><u></u> <u></u></span></i></p>
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</div>
<br><br>---------- Forwarded message ----------<br>From: Robert Stephenson <<a href="mailto:rstephenson@veic.org">rstephenson@veic.org</a>><br>To: Ed Mahler <<a href="mailto:emahler@hughesae.com">emahler@hughesae.com</a>>, "<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
Cc: <br>Date: Tue, 24 Sep 2013 08:59:28 -0400<br>Subject: Re: [Equest-users] Building Model appears correct in 3D view, but incorrect square footage in reports.<br><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal">
<a name="14151917f0eacd1e__MailEndCompose"><span style="color:#1f497d">Hi Ed,<u></u><u></u></span></a></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">Typically you can go into the .inp file and remove the test referencing your CAD attachment so you no longer get that warning. It looks like you are still in Wizard mode though, and I am not used to dealing with .inp files in that format. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">The square footage you are seeing is likely because the total square footage includes your plenum spaces. The actual conditioned space adds up to very close to the 23,240 you referenced.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">Hope that’s helpful.<u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
<div><p class="MsoNormal"><span style="color:#1f497d">Robert Stephenson<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:9.0pt;color:#1f497d">Technical Energy Analyst<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:9.0pt;color:#1f497d">VEIC Evaluation, Measurement and Verification Services<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:9.0pt;color:#1f497d">Burlington, 05401<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#1f497d"><a href="tel:802%20540%207809" value="+18025407809" target="_blank">802 540 7809</a><u></u><u></u></span></p><p class="MsoNormal" style="margin-bottom:12.0pt">
<a href="http://www.veic.org/" target="_blank"><span style="font-size:9.0pt">www.veic.org</span></a><span style="font-size:9.0pt;color:#1f497d"><u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p></div><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<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""> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Ed Mahler<br>
<b>Sent:</b> Monday, September 23, 2013 4:18 PM<br><b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> [Equest-users] Building Model appears correct in 3D view, but incorrect square footage in reports.<u></u><u></u></span></p>
</div></div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Equest Users:<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Anyone had a similar experience. This file gets errors related to a drawing file reference when you initiate. However, this file appears to be modeling correctly in 3d view. Originally imported drawing with intent to trace and build model from drawing. The drawing still seems to be linked, but used direct entry method instead for 3D modeling. <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Is there an easy way to keep equest from looking for the once imported drawing. I have attached the zipped file for your use in helping me resolve this issue. This may or may not be what is causing the incorrect square footage on the reports. However, the square footage appears to be about twice what it should rightly be. (It should be about 23,240 sq. ft instead of 43,394 sq. ft per output report). <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Thanks for your kind assistance. <u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Ed Mahler, PE,CEM</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Engineer</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:red">Hughes Associates Architects and Engineers</span></b><u><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></u></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:gray">Architecture</span></i><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> </span><span style="font-size:10.0pt;font-family:Wingdings;color:red">n</span><i><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> </span></i><i><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:gray">Engineering</span></i><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> </span><span style="font-size:10.0pt;font-family:Wingdings;color:red">n</span><i><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> </span></i><i><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:gray">Consulting</span></i><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">P.O. Box 1034, Roanoke, VA 24005-1034</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">656 Elm Avenue, SW, Roanoke, VA 24016</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Phone: <a href="tel:540.342.4002" value="+15403424002" target="_blank">540.342.4002</a></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> </span><span style="font-size:10.0pt;font-family:Wingdings;color:red">n</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Fax: <a href="tel:540.342.2060" value="+15403422060" target="_blank">540.342.2060</a></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><a href="http://www.HughesAE.com" target="_blank">www.HughesAE.com</a><u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:12.0pt;font-family:"Times New Roman","serif""> <u></u><u></u></span></p><p class="MsoNormal"><b><u><span style="font-size:12.0pt;font-family:"ClassGarmnd BT";color:green"><a href="http://www.usgbc.com/" title="http://www.usgbc.com/" target="_blank"><span style="color:green">U.S. Green Building Council Member</span></a></span></u></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:green"><u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:18.0pt;font-family:Webdings;color:green">P</span></b><b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> </span></b><b><span style="font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:green">please conserve, do not print this e-mail unless necessary</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u> <u></u></span></p><p class="MsoNormal"><i><span style="font-size:12.0pt;font-family:"Arial Black","sans-serif";color:maroon">"Tell me and I will forget. Show me and I may remember. Involve me and I will understand." Ben Franklin <u></u><u></u></span></i></p>
<p class="MsoNormal"><i><span style="font-size:13.5pt;font-family:"Arial Black","sans-serif";color:green"><u></u> <u></u></span></i></p><p class="MsoNormal"><u></u> <u></u></p></div></div><br><br>---------- Forwarded message ----------<br>
From: "Madjid Madjidi" <<a href="mailto:madjidi@email.de">madjidi@email.de</a>><br>To: <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>Cc: <br>Date: Tue, 24 Sep 2013 17:49:10 +0200 (CEST)<br>
Subject: [Equest-users] Heat pump COP curves<br><br>
Dear experts,<br>
<br>
how can I modulate the COP of a heat pump in eQUEST in relation to outdoor dry bulb temperature, outdoor wetbulb temperature and partial load. <br>
I see that I can enter the value for electricity input ratio (BTU/BTU) in a box (e.g. 0.3) and there are two different fraction curves available which<br>
can be defined as linear or quadratic or else functions. But it is unclear to me how these curves are linked to the EIR value (e.g. EIR x frac1 x frac 2 ?)<br>
and furthermore, how the supplemental heater could be considered. I have this problem with the baseline case for a LEED project and the reviewer has<br>
sent to me the following comment:<br>
<br>
It is unclear if the packaged rooftop heat pumps in the Baseline model were modeled according to Section G3.1.3.1, which requires that the electric<br>
airsource heat pumps are modeled with electric auxiliary heat that only energizes on the last thermostat stage and when the outdoor air temperature<br>
is less than 40 degrees F. Per ASHRAE Interpretation 90.1-2007-09, this means that the heat pump and auxiliary heat should operate together at low<br>
temperature conditions, with the compressor as the lead machine. The outside air cutoff temperature for the compressor must be no greater than the<br>
temperature associated with the low-temperature heating efficiency requirements of Table 6.8.1B (17 degrees F). Note that for packaged heat pump<br>
units smaller than 65,000 Btuh and packaged terminal heat pumps, the HSPF rating accounts for electric auxiliary operation, and includes test<br>
conditions at 17 degrees F.<br>
<br>
The interesting aspect is that there is no cop curve specified in ASHRAE 90.1. There are only two different values for the COP defined (3,3 and 3,22).<br>
So it seems that for the reference model (baseline) the value could be set to constant and I just have to consider three different situations:<br>
<br>
toutdb < 17 F --> COP = 1<br>
toutdb = 17 F --> COP = 2,25<br>
toutdb > 40 F --> COP = 3,3<br>
<br>
<br>
Is this true ? How should I model that in EQUEST ? Any friendly advise is welcome.<br>
<br>
Thank you in advance and with best regards<br>
<br>
Matt<br>
<br>
<br><br>---------- Forwarded message ----------<br>From: jacob goodman <<a href="mailto:jacobgoodman22@gmail.com">jacobgoodman22@gmail.com</a>><br>To: <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
Cc: <br>Date: Tue, 24 Sep 2013 10:37:07 -0600<br>Subject: [Equest-users] Heating energy backwards<br><div dir="ltr">Dear eQuest community,<div><br></div><div>I am working on a LEED project and have an issue where my higher efficiency proposed system is using significantly more gas than the baseline system. The proposed system is central AHU with zone VAV terminals fed by 96% AFUE boilers. The Baseline system is Appendix G system type 3 PSZ with 80% efficient gas furnace. I know there are tons of factors that go into this. I noticed that the higher baseline fan energy and higher lighting load are doing some of the work that the furnaces would do, but this doesn't account for the whole difference. Anything that jumps out comparing these two systems would be much appreciated.</div>
<div><br></div><div>since I have no one with greater eQuest knowledge in house, I am open to a few hours consulting with someone at a reasonable hourly rate if you think this could be resolved. </div><div><br></div><div>
Thanks,</div>
<div>Jacob</div></div>
<br><br>---------- Forwarded message ----------<br>From: Robby Oylear <<a href="mailto:robbyoylear@gmail.com">robbyoylear@gmail.com</a>><br>To: jacob goodman <<a href="mailto:jacobgoodman22@gmail.com">jacobgoodman22@gmail.com</a>><br>
Cc: "<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>Date: Tue, 24 Sep 2013 10:44:06 -0700<br>
Subject: Re: [Equest-users] Heating energy backwards<br><div dir="ltr">Anytime that you compare to different system types you're opening yourself up to a ton of potential issues just from the differences in how eQUEST models each system.<div>
<br></div><div>For a VAV system that is using more energy than a packaged single zone type system I'd recommend you look into a few things:</div>
<div>• Night fan cycling - if you've got single duct VAV terminals with reheat, your entire AHU system will have to come on to address night heating hours. Verify that you have a minimum OA schedule so that you're not ventilating the whole building during these hours as well.</div>
<div>• Minimum airflow setpoints - Verify your minimum airflow setpoints at the zone level are correct. This is where most of your reheat energy will come from.</div><div><br></div><div>Those are the two that come to mind immediately, but there may be other potential sources of error. Feel free to attach your building model (.pd2 & .inp files) to the list and maybe someone can look into it for you in more depth.</div>
<div><br></div><div>Hope that helps,</div><div>-Robby</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Sep 24, 2013 at 9:37 AM, jacob goodman <span dir="ltr"><<a href="mailto:jacobgoodman22@gmail.com" target="_blank">jacobgoodman22@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear eQuest community,<div><br></div><div>I am working on a LEED project and have an issue where my higher efficiency proposed system is using significantly more gas than the baseline system. The proposed system is central AHU with zone VAV terminals fed by 96% AFUE boilers. The Baseline system is Appendix G system type 3 PSZ with 80% efficient gas furnace. I know there are tons of factors that go into this. I noticed that the higher baseline fan energy and higher lighting load are doing some of the work that the furnaces would do, but this doesn't account for the whole difference. Anything that jumps out comparing these two systems would be much appreciated.</div>
<div><br></div><div>since I have no one with greater eQuest knowledge in house, I am open to a few hours consulting with someone at a reasonable hourly rate if you think this could be resolved. </div><div><br></div><div>
Thanks,</div>
<div>Jacob</div></div>
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<br><br>---------- Forwarded message ----------<br>From: R B <<a href="mailto:slv3sat@gmail.com">slv3sat@gmail.com</a>><br>To: jacob goodman <<a href="mailto:jacobgoodman22@gmail.com">jacobgoodman22@gmail.com</a>>, eQUEST Users List <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
Cc: <br>Date: Tue, 24 Sep 2013 13:04:31 -0500<br>Subject: Re: [Equest-users] Heating energy backwards<br><div dir="ltr"><div>Jacob,</div><div>I looked at your file. If you look at the <span>cfm's</span> for each zone, the proposed zones have more <span>cfm</span> than baseline. If the <span>cfm</span> is more than required, it leads to more reheat energy also - since you have min flows in the 30-40% range. You might want to check that or see why the baseline <span>cfm</span> numbers are lower than proposed (since lighting is reduced to almost half in proposed).</div>
<div>Hope this helps.</div><div>-<span>Rohini</span></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Sep 24, 2013 at 12:10 PM, jacob goodman <span dir="ltr"><<a href="mailto:jacobgoodman22@gmail.com" target="_blank">jacobgoodman22@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thanks for the reply! Let me know if you catch anything obvious or any thoughts in general. I don't want to spam the list so I'll just send it to anyone who replies. Thanks so much and I wish there was some kind of hourly help line/service for eQeust or LEED modeling for those of us not fortunate enough to have been doing this for 10 years or have a colleague who has.<span><font color="#888888"><div>
<br></div><div>J</div></font></span></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Sep 24, 2013 at 10:50 AM, R B <span dir="ltr"><<a href="mailto:slv3sat@gmail.com" target="_blank">slv3sat@gmail.com</a>></span> wrote:<br>
<blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid" class="gmail_quote"><div dir="ltr"><div>If you send me (or the mailing list) your .<span>inp</span>, .pd2, (for both baseline and proposed) and weather file, I can take a look at it. If you send the file to the mailing list, some other folks might also look at it and give you feedback.</div>
<div>Thanks,</div><div>-<span>Rohini</span></div></div><div class="gmail_extra"><br><br><div class="gmail_quote"><div><div>On Tue, Sep 24, 2013 at 11:37 AM, jacob goodman <span dir="ltr"><<a href="mailto:jacobgoodman22@gmail.com" target="_blank">jacobgoodman22@gmail.com</a>></span> wrote:<br>
</div></div><blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid" class="gmail_quote"><div><div><div dir="ltr">Dear eQuest community,<div>
<br></div><div>I am working on a LEED project and have an issue where my higher efficiency proposed system is using significantly more gas than the baseline system. The proposed system is central AHU with zone VAV terminals fed by 96% AFUE boilers. The Baseline system is Appendix G system type 3 PSZ with 80% efficient gas furnace. I know there are tons of factors that go into this. I noticed that the higher baseline fan energy and higher lighting load are doing some of the work that the furnaces would do, but this doesn't account for the whole difference. Anything that jumps out comparing these two systems would be much appreciated.</div>
<div><br></div><div>since I have no one with greater eQuest knowledge in house, I am open to a few hours consulting with someone at a reasonable hourly rate if you think this could be resolved. </div><div><br></div><div>
Thanks,</div>
<div>Jacob</div></div>
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<br><br>---------- Forwarded message ----------<br>From: Nathan Kegel <<a href="mailto:nathan.kegel@iesve.com">nathan.kegel@iesve.com</a>><br>To: "<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
Cc: <br>Date: Tue, 24 Sep 2013 18:08:59 +0000<br>Subject: [Equest-users] IES VE training - Philadelphia<br>
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<p class="MsoNormal">Apologies for cross-posting.<u></u><u></u></p>
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<br><br>---------- Forwarded message ----------<br>From: "Bishop, Bill" <<a href="mailto:bbishop@pathfinder-ea.com">bbishop@pathfinder-ea.com</a>><br>To: Madjid Madjidi <<a href="mailto:madjidi@email.de">madjidi@email.de</a>>, "<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
Cc: <br>Date: Tue, 24 Sep 2013 19:44:33 +0000<br>Subject: Re: [Equest-users] Heat pump COP curves<br>
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<p>Matt,<u></u><u></u></p>
<p><u></u> <u></u></p>
<p>I believe a sufficient response to your reviewer’s comment would be to verify/set the MIN-HP-T and MAX-HP-SUPP-T in the System -> Heating -> Supp Heat/Defrost tab. Minimum HP Heat Temp (MIN-HP-T) should be 17°F and Maximum HP Supp Temp
(MAX-HP-SUPP-T) should be 40°F. I don’t know how to model the requirement that auxiliary (supplemental) heat “only energizes on the last thermostat stage”. I’ll assume that eQUEST does that automatically, giving preference to the compressor and only adding
supplemental heat as necessary to meet the loads.<u></u><u></u></p>
<p><u></u> <u></u></p>
<p><img width="555" height="354" src="cid:image002.jpg@01CEB93B.F42641C0" alt="Madjid HP.jpg"><u></u><u></u></p>
<p><u></u> <u></u></p>
<p>Regards,<u></u><u></u></p>
<p>Bill<u></u><u></u></p>
<p><u></u> <u></u></p>
<p>William Bishop, PE, BEMP, BEAP, LEED AP | Pathfinder Engineers & Architects LLP<u></u><u></u></p>
<p>Senior Energy Engineer<u></u><u></u></p>
<p><u></u> <u></u></p>
<p>134 South Fitzhugh Street Rochester, NY 14608<u></u><u></u></p>
<p>T: <a href="tel:%28585%29%20325-6004%20Ext.%20114" value="+15853256004" target="_blank">(585) 325-6004 Ext. 114</a> F: <a href="tel:%28585%29%20325-6005" value="+15853256005" target="_blank">(585) 325-6005</a><u></u><u></u></p>
<p><a href="mailto:bbishop@pathfinder-ea.com" target="_blank">bbishop@pathfinder-ea.com</a> <a href="http://www.pathfinder-ea.com" target="_blank">www.pathfinder-ea.com</a><u></u><u></u></p>
<p> Sustainability – the forest AND the trees. <u></u><u></u></p>
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<p>-----Original Message-----<br>
From: <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] On Behalf Of Madjid Madjidi<br>
Sent: Tuesday, September 24, 2013 11:49 AM<br>
To: <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
Subject: [Equest-users] Heat pump COP curves<u></u><u></u></p>
<p><u></u> <u></u></p>
<p><u></u> <u></u></p>
<p>Dear experts,<u></u><u></u></p>
<p> <u></u><u></u></p>
<p>how can I modulate the COP of a heat pump in eQUEST in relation to outdoor dry bulb temperature, outdoor wetbulb temperature and partial load. I see that I can enter the value for electricity input ratio (BTU/BTU) in a box (e.g. 0.3)
and there are two different fraction curves available which can be defined as linear or quadratic or else functions. But it is unclear to me how these curves are linked to the EIR value (e.g. EIR x frac1 x frac 2 ?) and furthermore, how the supplemental heater
could be considered. I have this problem with the baseline case for a LEED project and the reviewer has sent to me the following comment:<u></u><u></u></p>
<p><u></u> <u></u></p>
<p>It is unclear if the packaged rooftop heat pumps in the Baseline model were modeled according to Section G3.1.3.1, which requires that the electric airsource heat pumps are modeled with electric auxiliary heat that only energizes on
the last thermostat stage and when the outdoor air temperature is less than 40 degrees F. Per ASHRAE Interpretation 90.1-2007-09, this means that the heat pump and auxiliary heat should operate together at low temperature conditions, with the compressor as
the lead machine. The outside air cutoff temperature for the compressor must be no greater than the temperature associated with the low-temperature heating efficiency requirements of Table 6.8.1B (17 degrees F). Note that for packaged heat pump units smaller
than 65,000 Btuh and packaged terminal heat pumps, the HSPF rating accounts for electric auxiliary operation, and includes test conditions at 17 degrees F.<u></u><u></u></p>
<p><u></u> <u></u></p>
<p>The interesting aspect is that there is no cop curve specified in ASHRAE 90.1. There are only two different values for the COP defined (3,3 and 3,22).<u></u><u></u></p>
<p>So it seems that for the reference model (baseline) the value could be set to constant and I just have to consider three different situations:<u></u><u></u></p>
<p><u></u> <u></u></p>
<p>toutdb < 17 F --> COP = 1<u></u><u></u></p>
<p>toutdb = 17 F --> COP = 2,25<u></u><u></u></p>
<p>toutdb > 40 F --> COP = 3,3<u></u><u></u></p>
<p><u></u><u></u></p>
<p><u></u> <u></u></p>
<p>Is this true ? How should I model that in EQUEST ? Any friendly advise is welcome.
<u></u><u></u></p>
<p><u></u> <u></u></p>
<p>Thank you in advance and with best regards<u></u><u></u></p>
<p><u></u> <u></u></p>
<p>Matt<u></u><u></u></p>
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