[BLDG-SIM] eQUEST daylight through interior windows

[Mike Tillou]

Renee,
 
Have you downloaded equest 3.61b yet?  This new version seems to have a
greatly expanded array of skylight modeling capability.  Although I
haven't had an oportunity to use it yet there is capability for
specifying light tubes.  I would be curious to know if you get better
results than previous versions of eQuest.  I still don't think you can
model daylighting through interior windows though.
 
Also for those who haven't updated eQuest in a while there are some
recent updates.
 
There is an updated version of 3.6 from last week.  
 
For those using 3.61b there is an update that fixes several bugs and
includes new features like variable exhaust at the zone level and
packaged PIU units so you can finally model Appendix G System 6.  Look
for eQuest 3-61 D2244e4 dated Feb 16.
 
Because the different versions install in different directories you can
have v3.55, 3.6 and 3.61 on your PC at the same time without any
trouble.
 
Mike
 
 
 
 
 
 

Michael Tillou, PE 
ETC Group - Energy Engineering for a Sustainable Future 
Ph:413-458-9870 

	-----Original Message-----
	From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of
Renee Azerbegi
	Sent: Monday, March 12, 2007 10:41 AM
	To: BLDG-SIM at gard.com
	Subject: [BLDG-SIM] eQUEST daylight through interior windows
	
	
	I have never had success at getting daylighting to work without
exterior glazing on a wall. Interior glazing and skylights alone will
not work. DOE2 engines require some exterior walled glazing. I would
recommend that you create the zone in a separate file, determine the
T-vis and SHGC change through two layers of glazing on the wall and add
your skylights. I'm not clear if DOE2 will model the daylighting effect
of skylights well or if it will just take the daylight energy savings
from the wall. I was modeling SolaTubes the other day in a zone with
exterior walled glazing and it didn't seem to provide much savings, a
lot less than I would have expected.  Anyone else have any thoughts on
this?
	Renee

________________________________

	From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of
Kingsley, Michael L.
	Sent: Monday, March 12, 2007 7:21 AM
	To: BLDG-SIM at gard.com
	Subject: [BLDG-SIM] eQUEST daylight through interior windows
	
	

	I am modeling a building with a 4-story internal atrium with
skylights on the roof.  There are some interior rooms with interior
windows facing the atrium, and I have enabled daylighting for these
rooms.  When I run the simulation I get errors for all of the rooms with
only interior windows saying that the window area must be greater than
0.1 ft2 for the room.  The windows are much larger than that.  Has
anyone else run into this kind of problem?  Any thoughts?

	 

	Thanks in advance!

	 

	Michael L. Kingsley

	E-mail <mailto:kezark at saic.com> :  kingsleym at saic.com
<mailto:kezark at saic.com> 

	 

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