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<p class="MsoNormal"><span style="color:#1F497D">Need to make a correction (& add clarification) to my answer below.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Clarified the square-footages: sf-ExtWall vs sf-floor.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:.5in"><span style="color:#1F497D">sf-ExtWall = how infiltration is entered in eQuest wizard<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:.5in"><span style="color:#1F497D">sf-floor = the value in eQuest/DOE2 simulations for infiltration.<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="color:#44546A;text-transform:uppercase"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Sorry for error.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">DARIC R ADAIR</span></b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">
PE, CEM, BEMP </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#383A35"><br>
Mechanical Engineer, Energy Analyst <br>
<br>
</span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#008C15;text-transform:uppercase">Henderson Engineers</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#383A35"><br>
<b><span style="text-transform:uppercase">Tel</span></b> (913) 742-5530 <br>
<a href="mailto:daric.adair@hendersonengineers.com"><span style="color:#383A35">daric.adair@hendersonengineers.com</span></a><br>
<br>
</span><b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">Licensed in</span></b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase"> KS</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#383A35"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:windowtext">From:</span></b><span style="color:windowtext"> Bruce Easterbrook [mailto:bruce5@bellnet.ca]
<br>
<b>Sent:</b> Friday, March 2, 2018 10:50 AM<br>
<b>To:</b> Daric Adair <Daric.Adair@hendersonengineers.com>; Joe Huang <yjhuang@whiteboxtechnologies.com>; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Infiltration issues whith more than one shell<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">The power of the user group comes to bear.<br>
Thanks Daric for running some numbers for everyone.<br>
As Joe mentioned the area in question is actually the floor area. My solution on this part of the project was in the end not solved by the model. As my time was bid limited and I was already getting push back on my modelling hours I concentrated my time on
designing the seal between the buildings. They were 6" apart and the curing room was using 15 psi steam to heat the space. Needless to say a 60' x 6" crack was the elephant in this building and I was required to drop my model evaluation of the infiltration
in this instance. It would have proved fruitless anyway as my assumption on the reference square footage was incorrect.<br>
I sometimes worry about posts and getting the dunce cap. lol I suppose age and a thicker skin helps. I rationalize it away with these exercises being a learning experience that benefit me as much as the group. The knowledge and experience this group brings
to bear is impressive.<br>
This discussion is illuminating and an old dog is still learning new tricks.<br>
Bruce<span style="font-size:12.0pt"><o:p></o:p></span></p>
<div>
<p class="MsoNormal">On 3/2/2018 10:33 AM, Daric Adair wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="color:#1F497D">All;</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Confused as to how Bruce’s answer isn’t directly applicable. What he detailed in the first instance is directly in line with my experiences. eQuest wizard modes doesn’t realize that two abutting/touching shells
should have interior walls. If a space wall touches a shell wall, an exterior wall is created.</span><o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]><span style="color:#1F497D">If a zone boarders a shell, eQuest creates an exterior wall.
</span><o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]><span style="color:#1F497D">If a zone does not touch a shell edge, eQuest makes an adiabatic interior wall.
</span><o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]><span style="color:#1F497D">If two shells are touching and each have zones touching the common wall, two exterior walls are created; one in each zone. Wizard eQuest doesn’t distinguish if two shells are 0 feet apart/touching or if they
are 25 feet apart. (example described below)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">If eQuest uses exterior wall area to calculate a floor area normalized infiltration rate, and there are ‘extra’ exterior walls which are actually interior walls where shells touch, then the infiltration rate
will be calculated as though the two shells were never touching. This will increase the calculated infiltration rate since these are not actually interior walls.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Bruce’s solution only neglected to mention that the infiltration rate will either need to be corrected for this condition, or ignored/neglected. The second option is not to say infiltration is not important –
it is important – but requires modeler judgement and some math. The length/area of the touching walls is also a factor to consider. If project is a large industrial setting as described in thread, yes, probably should check/revise. If a small connecting corridor,
probably minor and can be ignored. </span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="color:#44546A"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A">Did a quick (very simplified ) example. All examples have: 10ft high. No plenum. Set Perimeter infiltration to 0.05 CFM/</span><span style="color:#1F497D"> sf-ExtWall</span><span style="color:#44546A">. 0.0 core
infiltration.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A">- Made two shells, 50ft x 50ft each. 2 spaces per shell, spliting shell equally. Placed the shells touching. The calculated infiltration is 0.0400 cfm/</span><span style="color:#1F497D">sf-floor</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A">- Made two shells, 50ft x 50ft each. 2 spaces per shell, spliting shell equally. Placed the shells 50 feet apart. The calculated infiltration is 0.0400 cfm/</span><span style="color:#1F497D"> sf-floor</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A">- Made one shell, 100ft x 50ft each. 4 spaces per shell, spliting vertically,such that the zones are the same area/dimensions as the previous examples. The calculated infiltration is 0.0400 cfm/</span><span style="color:#1F497D">
sf-floor</span><span style="color:#44546A"> in the end cap spaces, and 0.0200 CFM/</span><span style="color:#1F497D"> sf-floor</span><span style="color:#44546A"> in the middle spaces. This is due to less exterior wall area (as expected).</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A">- Made two shells, 50ft x 50ft each. 2 spaces per shell, same spaces as above. But – offset the edge of the shells when drawing in wizard mode such that the edge of the spaces were not the edge of the shell(s)
(refer to image). Placed the shells such that the two zones were touching. The calculated infiltration is 0.0400 cfm/</span><span style="color:#1F497D"> sf-floor</span><span style="color:#44546A"> in the end cap spaces, and 0.0200 CFM/</span><span style="color:#1F497D">
sf-floor</span><span style="color:#44546A"> in the middle spaces; matching as if done in a single shell.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A">The last example allows the user to change the wall from adiabatic to a heat transfer surface easily. Can also modify the infiltration rate as needed & detailed ablve. PNNL has published several reports on infilatration
rates which can be references as well for good information.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A">Let me (and all of us) know if this seems at odd with previous experiences or overlooked a detail. Thanks in advance.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A;text-transform:uppercase"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#44546A"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">DARIC R ADAIR</span></b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">
PE, CEM, BEMP </span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#383A35"><br>
Mechanical Engineer, Energy Analyst <br>
<br>
</span><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#008C15;text-transform:uppercase">Henderson Engineers</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#383A35"><br>
<b><span style="text-transform:uppercase">Tel</span></b> (913) 742-5530 <br>
<a href="mailto:daric.adair@hendersonengineers.com"><span style="color:#383A35">daric.adair@hendersonengineers.com</span></a><br>
<br>
</span><b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase">Licensed in</span></b><span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#383A35;text-transform:uppercase"> KS</span><o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="color:windowtext">From:</span></b><span style="color:windowtext"> Bruce Easterbrook [<a href="mailto:bruce5@bellnet.ca">mailto:bruce5@bellnet.ca</a>]
<br>
<b>Sent:</b> Thursday, March 1, 2018 11:19 PM<br>
<b>To:</b> Joe Huang <a href="mailto:yjhuang@whiteboxtechnologies.com"><yjhuang@whiteboxtechnologies.com></a>;
<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Infiltration issues whith more than one shell</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Thank's Joe, I didn't realize that. There are many quirks with DOE2 and eQuest. I haven't looked at that part of the fine print recently. Leakage does depend on the wall area and not the floor area in real
terms. Buildings have many different wall heights, plenums or not, ducted or not, etc. I would guess after normalization that one would have to be careful with how manipulations in geometry are done to achieve other effects in the model. Infiltration can
have a serious effect on a model.<br>
I can remember a past model where I used this technique for an actual butting of 2 industrial spaces/buildings. The one area was a cable casing thermal setting zone, 1/2 height of the warehouse/machinery high bay zone that was adjacent to it. I was more concerned
with the door and seal between the 2 buildings. I possibly missed the infiltration difference seeing it was based on floor area and not wall area. I will have to re-read the fine print.<br>
Bruce<o:p></o:p></p>
<div>
<p class="MsoNormal">On 3/1/2018 10:32 PM, Joe Huang via Equest-users wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p>I don't think Bruce's comment is germaine to the problem posed by Menush, since Menush is asking about infiltration and not heat transfer through interior walls. As far as I know from DOE-2 (always have to add that caveat because I don't work much in eQUEST),
infiltration rates are normalized per floor area, rather than external wall area, mainly because that's how the infiltration models have been developed, i.e., effective leakage areas have always been defined as per floor area. If you don't think that's right,
you can always adjust the input values by the ratio of the external wall area to the floor area, as you've described, but then you're on your own in coming up with the correlation,
<o:p></o:p></p>
<p>Joe<o:p></o:p></p>
<pre>Joe Huang<o:p></o:p></pre>
<pre>White Box Technologies, Inc.<o:p></o:p></pre>
<pre>346 Rheem Blvd., Suite 205A<o:p></o:p></pre>
<pre>Moraga CA 94556<o:p></o:p></pre>
<pre><a href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a><o:p></o:p></pre>
<pre><a href="http://weather.whiteboxtechnologies.com">http://weather.whiteboxtechnologies.com</a> for simulation-ready weather data<o:p></o:p></pre>
<pre>(o) (925)388-0265<o:p></o:p></pre>
<pre>(c) (510)928-2683<o:p></o:p></pre>
<pre>"building energy simulations at your fingertips"<o:p></o:p></pre>
<div>
<p class="MsoNormal">On 3/1/2018 6:44 PM, Bruce Easterbrook via Equest-users wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt">Hi Menush,<br>
I don't think you have the same thing. eQuest will treat 2 shells butted to each other differently than a single interior wall separating 2 zones in a shell. It treats the 2 butted walls as exterior walls with a tiny space between. They are the same wall
in your thinking but they are not. You can delete one of them and make the remaining wall an interior wall and assign the proper butting spaces on each side of the wall as sharing the wall and transferring heating and cooling through the wall. Or you can
add an interior wall to the original space and separate it into 2 zones. As you have noticed there is a difference in the way eQuest treats your 2 solutions. It is particular. Now you need to pick the configuration that matches what you are trying to model
in such a way that eQuest does/treats the wall in the way you want it to work.<br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<o:p></o:p></p>
<div>
<p class="MsoNormal">On 3/1/2018 5:23 PM, Menush Akbari via Equest-users wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I’m having an issue with infiltration and wondering if anyone else has noticed this. When I’m in wizard mode, I build a very simple rectangular shell and I change the infiltration rate for perimeter zones to 0.05cfm/ft2. I leave the core
zone infiltration rate to the eQuest default value (0.001cfm/ft2). From my understanding, the perimeter zone entered value in wizard mode is based on exterior gross wall area. When I move on to detail mode, eQuest changes the value to an infiltration value
per floor area instead of exterior wall area. The values so far make sense and I can do the math and get the same numbers eQuest calculates in detail mode. No problems here.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">The problem however happens when I create different shells. For example, let’s say I have the same rectangular building as mentioned above, but I split this up into two different shells next to each other (two square shells), therefore
one of the walls of each square shell is an interior wall, which means I should not see an infiltration of 0.05 cfm/ft2 of the gross wall area. However when I finish building these two shells in detail mode (which would be identical to one rectangular shell),
the infiltration value is not accurate anymore. Instead of the same numbers as my first model (one rectangular shell), the second model calculates an exterior wall infiltration value for the interior walls that are budded up against each other.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Has anyone come across this? Is this a quirk with eQuest and just needs to be changed manually in detail mode, or am I doing something wrong here?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thanks for the help.<o:p></o:p></p>
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<p class="MsoNormal">Cheers,<o:p></o:p></p>
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<p class="MsoNormal"><b><span lang="EN-CA" style="font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA">Menush Akbari</span></b><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA">BEng, PEng, BEMP, CMVP</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA">Senior Energy Engineer</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA">Mission Green Buildings</span><o:p></o:p></p>
<p class="MsoNormal"><i><span lang="EN-CA" style="font-size:9.0pt;font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA">(Mission Green Buildings is the trading name of Mission Green Limited)</span></i><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA">t. 250 777 3380</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA"><a href="mailto:makbari@missiongreenbuildings.com">makbari@missiongreenbuildings.com</a></span><o:p></o:p></p>
<p class="MsoNormal"><u><span lang="EN-CA" style="font-size:10.0pt;font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA"><a href="http://missiongreenbuildings.com/">http://missiongreenbuildings.com</a></span></u><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-family:"Corbel",sans-serif;mso-fareast-language:EN-CA"><img border="0" width="323" height="85" style="width:3.3645in;height:.8854in" id="Picture_x0020_1" src="cid:image001.jpg@01D3B215.9ADAE350" alt="MGB 5 Years 2"></span><o:p></o:p></p>
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<pre><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><o:p></o:p></pre>
<pre>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></pre>
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<pre>_______________________________________________<o:p></o:p></pre>
<pre>Equest-users mailing list<o:p></o:p></pre>
<pre><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><o:p></o:p></pre>
<pre>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></pre>
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<pre>_______________________________________________<o:p></o:p></pre>
<pre>Equest-users mailing list<o:p></o:p></pre>
<pre><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><o:p></o:p></pre>
<pre>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></pre>
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