[BLDG-SIM] System 6 and High Efficiency Window

[Garcia, Robert]

There seems to be little reponse to the issue of modeling System 6 of
ASHRAE 90.1-2004.  Has anyone been able to model a Packaged VAV with PFP
Boxes in eQUEST?
 
Robert Garcia
AKF Engineers, LLP
1500 Walnut Street, Suite 1400
Philadelphia, PA 19102 
Phone:   (215) 282-2182
Fax:        (215) 735-6706
www.akf <http://www.akf-engineers.com/> -engineers.com

	-----Original Message-----
	From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of
Garcia, Robert
	Sent: Wednesday, August 22, 2007 2:46 PM
	To: BLDG-SIM at gard.com
	Subject: [BLDG-SIM] System 6 and High Efficiency Window
	
	
	I would like to discuss question number 1 as well.  Appendix G
specifies that Direct Expansion be used as the cooling type for System
6.  However, the PIU system in eQuest does not allow you to use DX
coils.  I have seen several archived posts on this same question that
say to model a chiller equivalent to the DX coils, but nothing further.
I have redefined the chiller performance curves accordingly with no
success.  Has anyone set up this system succesfully in eQuest?  
	 
	In response to Questions 2 and 3, the U-value and Shading
Coefficient of the glass has significant impact on the energy savings
with the HVAC system.  In addition, the visible light transmittance of
the glass directly impacts the Daylighting controls within the rooms
affecting electric usage.  The selection of glass should be investigated
when determining the window-wall ratio and the resulting savings.
	 
	
	
	Robert Garcia
	AKF Engineers, LLP
	1500 Walnut Street, Suite 1400
	Philadelphia, PA 19102 
	Phone:   (215) 282-2182
	Fax:        (215) 735-6706
	www.akf <http://www.akf-engineers.com/> -engineers.com
	 
	-----Original Message-----
	From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of
Virdi Permana
	Sent: Wednesday, August 22, 2007 1:59 PM
	To: BLDG-SIM at gard.com
	Subject: [BLDG-SIM] System 6 and High Efficiency Window
	
	

		Hello All,

		Quick question on System 6: Package VAV w/PFP boxes.

		1.	How do you use system 6 in eQUEST? Do you have
to use parallel PIU at the zone? 
		2.	At what percentage of window to wall ratio that
high efficiency can star contribute significant saving? 
		3.	At what number is considered significant saving?


		Any respond is greatly appreciated.

		 

		Sincerely,

		 

		Virdiansyah "Virdi" Permana

		EMSI

		Energy Analyst

		(202) 291 3102 T

		(202) 291 3107 F 

		 

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