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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thank you all for the help.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>One way that we are thinking of to model
it is using the indirect and direct evaporative cooling system both as a
separate system.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Indirect system can then be made to the
work of Earth Air Tunnel(EAT) of sensibly precooling.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>After this the direct evaporative cooler
can further bring down the temperature as well as humidify the air.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>During the monsoon season the fan schedule
for the direct cooling system can be kept off and only indirect system will do
the sensible precooling.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>However one difficulty here is that we are
not able to give the cooling capacity for the indirect evaporative cooling system.eQuest
accepts it only for DX coils <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>and cooling coils when chillers are being
used.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>We are trying to work along these lines and
if anyone has any suggestion please do share.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>If we are able to come up with any
solution, will certainly let you all know.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks again for your response.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
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<p class=MsoNormal style='mso-margin-top-alt:auto'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Vishnuraj
Nair</span></font><font color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Kalpakrit Sustainable Environments Pvt.
Ltd. </span></font><font size=2 color=navy face=Garamond><span
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w:insAuthor="Samir Sharma" w:insDate="2009-02-20T09:27:00Z"
w:endInsAuthor="Samir Sharma" w:endInsDate="2009-02-20T09:27:00Z"><ns1:City
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w:st="on"><st1:place w:st="on"><font color=navy><span style='color:navy'>New
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10.0pt;font-family:Arial;color:navy'>Tel: +91.124.4309490-92 Ext: 312 , Fax:
+91.124.4309493<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
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style='font-size:13.5pt;font-family:Webdings;color:#008040'>ü</span></font><font
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Demba Ndiaye
[mailto:Demba.Ndiaye@uoit.ca] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, February 18, 2009
11:04 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Steve Mignogna;
vishnu@kalpakrit.com<br>
<b><span style='font-weight:bold'>Cc:</span></b> <st1:PersonName w:st="on">bldg-sim@lists.onebuilding.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Bldg-sim] eQuest -
Modelling Earth Air Tunnel system</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;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></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>_____________<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Demba Ndiaye<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-CA
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0pt 0pt 0pt'>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Steve Mignogna<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, February 18, 2009
11:23 AM<br>
<b><span style='font-weight:bold'>To:</span></b> vishnu@kalpakrit.com<br>
<b><span style='font-weight:bold'>Cc:</span></b> <st1:PersonName w:st="on">bldg-sim@lists.onebuilding.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Bldg-sim] eQuest -
Modelling Earth Air Tunnel system<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span lang=EN-CA style='font-size: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>
<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-CA
style='font-size:12.0pt'>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></span></font></p>
<div>
<div>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Hi
friends,</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>I
am trying to model an Earth Air Tunnel (EAT) system that is being used in a
school for passive precooling.</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>During
summer first the air is pre cooled using the EAT and then evaporative cooling
is done before being circulated into the zone.</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>During
monsoon again precooling is done using EAT and then chillers are being used for
further cooling and dehumidification.</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>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></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Any
help would be greatly appreciated. Thanks</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Vishnuraj
Nair</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Kalpakrit
Sustainable Environments Pvt. Ltd. </span></font><o:p></o:p></p>
<p><st1:City w:st="on"><st1:place w:st="on"><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>New Delhi</span></font></st1:place></st1:City><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Tel:
+91.124.4309490-92 Ext: 312 , Fax: +91.124.4309493</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>E-mail
: <a href="mailto:vishnu@kalpakrit.com" target="_blank">vishnu@kalpakrit.com</a></span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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