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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>A cautionary note here is that changing outside temperature in
the weather file would, among others, change the load seen by the building.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>_____________<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Demba Ndiaye<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Steve
Mignogna<br>
<b>Sent:</b> Wednesday, February 18, 2009 11:23 AM<br>
<b>To:</b> vishnu@kalpakrit.com<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] eQuest - Modelling Earth Air Tunnel system<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Vishnuraj-<br>
<br>
This is very difficult and may not lead to the correct results, but one method
would be to manually edit the weather file. You would need to change the
temperatures so that the outdoor air that is pulled into the system would be at
the temperature of the earthduct preconditioned air. However, I would not
recommend doing this without testing to see how it changes the other aspects of
the simulation.<br>
<br>
I have seen earthducts modeled correctly in both MATLAB and TRNSYS but I have
not successfully modeled it within eQuest.<br>
<br>
-- <br>
Steve Mignogna<br>
Atelier Ten<br>
<br>
<br>
<o:p></o:p></p>
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<p class=MsoNormal>On Wed, Feb 18, 2009 at 2:48 AM, Vishnuraj Nair <<a
href="mailto:vishnu@kalpakrit.com">vishnu@kalpakrit.com</a>> wrote:<o:p></o:p></p>
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<div>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi
friends,</span><span lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
am trying to model an Earth Air Tunnel (EAT) system that is being used in a
school for passive precooling.</span><span lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>During
summer first the air is pre cooled using the EAT and then evaporative cooling
is done before being circulated into the zone.</span><span lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>During
monsoon again precooling is done using EAT and then chillers are being used for
further cooling and dehumidification.</span><span lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Does
anyone have any idea as to how to calculate and incorporate the degree of
precooling that is achieved by the EAT into the eQuest model.</span><span
lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Any
help would be greatly appreciated. Thanks</span><span lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Vishnuraj
Nair</span><span lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Kalpakrit
Sustainable Environments Pvt. Ltd. </span><span lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>New
Delhi</span><span lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Tel:
+91.124.4309490-92 Ext: 312 , Fax: +91.124.4309493</span><span lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>E-mail
: <a href="mailto:vishnu@kalpakrit.com" target="_blank">vishnu@kalpakrit.com</a></span><span
lang=EN-US><o:p></o:p></span></p>
<p><span lang=EN-US> <o:p></o:p></span></p>
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