[BLDG-SIM] eQUEST daylight through interior windows

Rohini Brahme rbrahme at harc.edu
Mon Mar 19 10:36:20 PDT 2007


I think you can do it if the space next to the interior window is
declared as a sun-space.

	-----Original Message-----
	From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of
Mike Tillou
	Sent: Monday, March 12, 2007 11:25 AM
	To: BLDG-SIM at gard.com
	Subject: [BLDG-SIM] eQUEST daylight through interior windows
	
	
	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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