[Bldg-sim] Curtain wall retrofit options

[De Rose, David]

How about adding a removable lite of glass from the interior at vision
areas? Removable to allow cleaning in between lites should there be any
incidental scumming over time. Inner lite can be kept in place with a 2
piece stop and perimeter gaskets. The new inner glass lite can be coated
with a solar control pyrolytic low-e coating (Pilkington has one). Work
can be done at night to limit tenant disruption. 

 

David De Rose, M.A.Sc., P.Eng., BSSO

Halsall Associates 
Tel: 416.644.0341 * Toll Free: 1.888.425.7255 * www.halsall.com
<http://www.halsall.com/> 
Vancouver * Calgary * Sudbury  * Burlington * Toronto * Ottawa * Dubai
Best Workplaces in Canada, Five Consecutive Years: 2007 - 2011
__________________________
A Parsons Brinckerhoff Company 

 

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Adam
Jackaway
Sent: October 6, 2011 4:42 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Curtain wall retrofit options

 

Hi folks,

 

I'm currently involved with a prospective project to retrofit an
existing urban office building in a robust four-season climate. The
building is roughly 60 floors, circa early 1960's, with an original
single pane, non-thermally-broken aluminum curtain wall, and anodized
aluminum spandrel panels. We don't have exact glazing specs yet, but COG
is likely in the range of: SHGC=0.43, Tvis=0.53, Uval=1.00

 

Here's the question: If you wanted to retrofit the facade to improve
overall building energy / occupant comfort (heating, cooling, solar
control, daylighting, MRT adjacent to glazing, etc.), but were required
to retain the original glazing (for architectural considerations, or due
to impracticality of complete facade removal with existing tenants),
what options might you pursue? Additional potential constraints of note
(still to be determined) may include: mullion depth limitations,
structural facade load limits. Also worth noting that the building's
rectangular plan features a SW-facing long-axis orientation, so
spring-through-fall cooling loads are likely to be enormous. Finally, if
a second skin solution is to be pursued, we're also keen to keep an eye
on condensation issues.

 

What's the latest, greatest thinking in this arena? Suggestions /
comments much appreciated....

 

cheers,

 

Adam

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