[bldg-sim] High Performance Glazing

Erik Kolderup ekolderup at archenergy.com
Thu Dec 15 13:55:19 PST 2005


Mark,

 

This is a fairly common result, and there can be several reasons. The lower
SC, even on the north side, means less beneficial solar gain that would
otherwise offset some of the reheat. Another thing that could be going on is
that there is less beneficial free cooling with the high performance glazing
during mild outdoor conditions (due to the lower U-factor). Therefore, if
you have supply air temperature reset, you may end up with lower supply air
temperatures due to higher cooling loads. That leads to more reheat required
in the zones that are at minimum airflow. As Mitch mentioned in a separate
email, it can be useful to evaluate several options with different
combinations of SC and U-factor to find the optimal combination.

 

Erik Kolderup

Architectural Energy Corporation

 

 

  _____  

From: bldg-sim at gard.com [mailto:bldg-sim at gard.com] On Behalf Of Zoeteman,
Mark R.
Sent: Thursday, December 15, 2005 12:53 PM
To: bldg-sim at gard.com
Subject: [bldg-sim] High Performance Glazing

 

I am modeling high performance glazing with U=0.14, SC=0.35 and comparing to
typical 1" thick insulating low-e glass with U=0.33, SC=0.76.  Climate is
midwest US and 86% of the glass is facing north. The north wall is basically
all glass and spandrel. Heating is suppied from district steam supply.

Results show increased steam energy consumption from February through
September with high performance glazing and less for remaining winter
months. HVAC system is VAV with hot water reheat coils.

Overall annual steam energy consumption reduction is very small. I expected
to see significant heating energy savings due to increased perimeter
R-value. Has anyone modeled high performance glazing and seen similar
results? 

 

Mark Zoeteman 
FTC&H, Inc. 
(616) 464-3739 
mrzoeteman at ftch.com 

 

 
 
==================
You received this e-mail because you are subscribed 
to the BLDG-SIM at GARD.COM mailing list.  To unsubscribe 
from this mailing list send a blank message to 
BLDG-SIM-UNSUBSCRIBE at GARD.COM


======================================================
You received this e-mail because you are subscribed 
to the BLDG-SIM at GARD.COM mailing list.  To unsubscribe 
from this mailing list send a blank message to 
BLDG-SIM-UNSUBSCRIBE at GARD.COM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20051215/460438f3/attachment-0002.htm>


More information about the Bldg-sim mailing list