[BLDG-SIM] System 6 and High Efficiency Window

[Garcia, Robert]

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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