[bldg-sim] High Performance Glazing

[Zoeteman, Mark R.]

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




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