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<p class="MsoNormal"><span style="font-size:9.0pt;color:black">Hello Yongqing:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black">I think I agree with Joe on this one.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black">There’s a BIG mismatch between the computation time for a simulation like DOE-2 and a 3D CFD simulation of a modestly complicated building. We found this to be true in the analysis of the Buddhist
temple that was simulated with CFD and DOE-2 back in 2006 (see reference below and/or thesis). What we ended up doing was looking at specific days, then extrapolating to the rest of the year. The CFD did give some nice color contour plots that looked pretty
groovy when we animated them.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black">I suspect that you find similar issues even today (i.e., 10 years later).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black">Jeff<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black">REF: Sreshthaputra, A., Haberl, J., Andrews, M. 2004. “Improving Building Design and Operation of a Thai Buddhist Temple,”
<i>Energy and Buildings</i>, Vol. 36, pp. 481-494. ESL-PA-04-06-01 (June).</span><span style="font-size:9.0pt;color:black"><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>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:blue">8=! 8=) :=) 8=) ;=) 8=) 8=( 8=) 8=() 8=) 8=| 8=) :=') 8=) 8=?<br>
Jeff S. Haberl, Ph.D.,P.E.inactive,FASHRAE,FIBPSA,......<a href="mailto:........jhaberl@tamu.edu">jhaberl@tamu.edu</a><br>
Professor........................................................................Office Ph: 979-845-6507<br>
Department of Architecture............................................Lab Ph:979-845-6065<br>
Energy Systems Laboratory...........................................FAX: 979-862-2457<br>
Texas A&M University...................................................77843-3581<br>
College Station, Texas, USA, 77843..............................URL:www.esl.tamu.edu<br>
8=/ 8=) :=) 8=) ;=) 8=) 8=() 8=) :=) 8=) 8=! 8=) 8=? 8=) 8=0<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-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Joe Huang<br>
<b>Sent:</b> Monday, February 29, 2016 12:46 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Can DOE2 couple with CFD software?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I think there's such a large difference in computational intensity (?) between DOE-2 (or any simulation program that models a thermal zone as a single node) and CFD that coupling the two together does not make sense to me, even if it could
be done. I think you're much better off looking into coupling DOE-2 to a multi-zone air-flow program like CONTAM or COMIS. Even then, you have to exchange data back and forth at each time step, since air flows and zone air temperatures are so interconnected.
I spent more than a year in coupling EnergyPlus to COMIS back in 200-2002.<br>
It would probably be easier to do in DOE-2 SYSTEMS, but would still require changes to the source code to call the airflow program at each time step. Not trivial and not a "work around". Thoughts from others would be welcomed.<br>
<br>
Joe<br>
<br>
<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>
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<p class="MsoNormal">On 2/29/2016 7:52 AM, <span style="font-family:"MS Mincho"">
冷面寒</span><span style="font-family:"PMingLiU",serif">枪</span> wrote:<o:p></o:p></p>
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<span style="font-family:"Arial",sans-serif;color:#4B4B4B">Hi,everyone<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:10.5pt;margin-left:0in">
<span style="font-family:"Arial",sans-serif;color:#4B4B4B">I want to invesitigate nature ventiation's impaction on building energy.However,nature ventilation feature has many restrictions in eQUEST.So I consider coupling DOE2 with CFD software such as fluent
to analysis the energy saving potential of nature ventilation.Any suggestion?<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:10.5pt;margin-left:0in">
<span style="font-family:"Arial",sans-serif;color:#4B4B4B">Thanks you!<o:p></o:p></span></p>
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<p class="MsoNormal"><strong><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#3366FF">Yongqing Zhao</span></strong><span style="font-size:10.5pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><strong><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#006600">Changsha Green Building & Energy Saving Technology CO.,LTD</span></strong><b><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#006600"><br>
</span></b><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#3366FF">NO.438,Shaoshan Road,Changsha,Hunan,China<br>
Telephone:13574805636</span><span style="font-size:10.5pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:#3366FF"><a href="mailto:Email:zhaoyongqing1987@126.com">Email:zhaoyongqing1987@126.com</a></span><span style="font-size:10.5pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">
<a href="mailto:503271081@qq.com">503271081@qq.com</a></span><span style="font-size:10.5pt;font-family:"Verdana",sans-serif"> <o:p></o:p></span></p>
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<pre>_______________________________________________<o:p></o:p></pre>
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