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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'>We tried to model radiant systems in IES
and it failed miserably (the creation of a floor plenum, adding energy, trying
to see what happened, a nightmare).<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'>I would suggest at this present date,
TRNSYS or ROOM (E+TA), for those who can wait ASHRAE is sponsoring the
development of a radiant system design and evaluation tool (RP 1383)<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>
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<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><st1:PersonName
w:st="on"><font size=2 color=black face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:black'>Peter Simmonds</span></font></st1:PersonName><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>. Ph.D.</span></font><font size=1 color=gray face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:gray'><br>
Senior Associate, Advanced Technology Group<br>
<br>
</span></font><font color=gray face=Arial><span style='font-family:Arial;
color:gray'>IBE Consulting Engineers</span></font><font color=gray><span
style='color:gray'><br>
</span></font><font size=1 color=gray face=Arial><span style='font-size:7.5pt;
font-family:Arial;color:gray'>14130 Riverside Drive Suite 201</span></font><font
size=1 color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'><br>
</span></font><font size=1 color=gray face=Arial><span style='font-size:7.5pt;
font-family:Arial;color:gray'>Sherman Oaks, CA 91423<br>
p: (818) 377-8220 ext. 246<br>
f: (818) 377-8230<br>
m: (818) 219-1284<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
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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'><o:p> </o:p></span></font></p>
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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'> Rebecca Butler
[mailto:Rebecca.Leigh.Butler@gmail.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, March 05, 2009
8:50 AM<br>
<b><span style='font-weight:bold'>To:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] IES VE:
Radiant, hollow core ceiling</span></font><o:p></o:p></p>
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<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=3 face="Times New Roman"><span style='font-size:
12.0pt'>I have a question regarding the capabilities of IES VE and its CFD
package and I was hoping someone might have some experience or insight to help
get me started on the following problem. We have a concept cooling design
which includes a radiant hollow core concrete ceiling through which
evaporatively cooled air is routed. The air which is routed through the
radiant ceiling comes from a central evaporative cooler and is then exhausted
at the exterior of each room after it has passed through the airflow passages
in the ceiling. Just to be clear, this is not a typical radiant system in
that electricity is being used to cool the slab but instead evaporatively
cooled outdoor air is being used in its place. We also want to couple
these effects with natural ventilation which occurs because of the use of
operable windows. <br>
<br>
We are trying to analyze the effects of these techniques in a cooling season in
<st1:State w:st="on"><st1:place w:st="on">Colorado</st1:place></st1:State>
(hence the benefit of the evaporative cooler). We have conducted rough
calculations of the benefits of using such a system using standard ASHRAE
energy transfer techniques and we want to verify our results. Have you
ever heard of this type of system being modeled in IES VE and/or is it capable
of modeling such a system? Is there a way to modify the "radiant
ceiling" option in IES to take into account the saving which would occur
by using evaporatively cooled air in the place of electricity? If not, is
there a way to manually create such a system from the ground up?<br>
<br>
Any help would be greatly appreciated. Thank you.<br>
<font color="#888888"><span style='color:#888888'><br>
Rebecca Butler<br>
LEED AP<br>
Enermodal Engineering<br>
(303) 861-2070</span></font> <o:p></o:p></span></font></p>
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