[Bldg-sim] IES VE: Radiant, hollow core ceiling

[Peter Simmonds]

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).

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)

 

Peter Simmonds. Ph.D.
Senior Associate, Advanced Technology Group

IBE Consulting Engineers
14130 Riverside Drive Suite 201
Sherman Oaks, CA 91423
p:   (818) 377-8220 ext. 246
f:    (818) 377-8230
m:  (818) 219-1284

This e-mail message, including any attachments, is for the sole use of
the intended recipient(s) and may contain confidential and privileged
information. Any unauthorized review, use, disclosure, or distribution
is prohibited. If you are not the intended recipient, please contact the
sender by reply e-mail and destroy all copies of the original message

 

________________________________

From: Rebecca Butler [mailto:Rebecca.Leigh.Butler at gmail.com] 
Sent: Thursday, March 05, 2009 8:50 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] IES VE: Radiant, hollow core ceiling

 

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.  

We are trying to analyze the effects of these techniques in a cooling
season in Colorado (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?

Any help would be greatly appreciated.  Thank you.

Rebecca Butler
LEED AP
Enermodal Engineering
(303) 861-2070 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20090305/6e3765db/attachment-0002.htm>