[Equest-users] Modeling regular curtain wall systems

[Bishop, Bill]

I typically model curtain walls as a single window per exterior wall
surface, and increase the frame width to make the frame area equal to
the total non-glazed area of the window opening.

I select a glass type from the DOE-2 window library based on the closest
match of U-value and SHGC to the actual glazing selection.

 

Bill

 

 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Arpan
Bakshi
Sent: Thursday, May 05, 2011 8:29 PM
To: Mark Darrall
Cc: equest-users
Subject: Re: [Equest-users] Modeling regular curtain wall systems

 

Mark, in the interest of time, you can accomplish what you would like to
through the Building Shell Wizard --

 

1. If you already have a Window 4/5 file from the manufacturer, attach
it in Wizard Screen 6 under Glass Category. 

 

2. If you do not have this, right-click Glass Category and under
Tutorials and Reference, and navigate to DOE 2 Glass Library (xls). You
will be able to find something comparable to your glass type here.
Select a Frame Type and Frame Wd (in) which matches your curtain wall
assembly. 

 

3. Under Window Dimensions, Positions and Quantities, you can specify a
Typ Window Width (ft). Now comes the shortcut to avoid Custom
Window/Door Placement. If your fenestration design consists of an
irregular, custom pattern, count the number of vertical mullions you
have, and divide the full width of the curtain wall by that number.
Enter that number into Typ Window Width (ft). Though your curtain wall
will not have the same appearance in the 3D View, you are provided the
same length of lineal feet of window frame, which will result in the
same overall assembly U factor.

 

 

On Thu, May 5, 2011 at 7:55 PM, Mark Darrall <MDarrall at a2so4.com> wrote:

Thank you! I'm working against a pretty hard deadline and don't really
have time to learn two more software packages. I found some basis of
design information for both the curtain wall and glazing - can I use
manufacturer's design guide graphs and calculations? The graphs are "per
AAMA 507." They also have charts for NFRC 100 overall U factors and NFRC
200 SHGC and VT.

 

I think the LEED reviewers just want to make sure we're accounting for
the frames and not just getting COG.

 

Take care!

 

MARK DARRALL, AIA, LEED AP BD+C, NCARB
Senior Project Manager

 

 

 

DESIGN ENRICHING LIFE // LIFE ENRICHING DESIGN

 

A2SO4 Architecture, LLC

Union Station
300 South Meridian Street / 250
Indianapolis, Indiana 46225
TEL  317 388 8850 <tel:317%20388%208850> 

FAX  317 280 0692 <tel:317%20280%200692> 

MOB 765 749 0841 <tel:765%20749%200841> 
www.a2so4.com

 

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From: Alex Krickx [mailto:akrickx at seriousmaterials.com] 
Sent: Thursday, May 05, 2011 7:47 PM
To: Carol Gardner; Mark Darrall
Cc: equest-users
Subject: RE: [Equest-users] Modeling regular curtain wall systems

 

You can create curtainwall systems in Window and Therm - but I don't
believe that eQUEST will import any of the frame conductance data. I
think the best way to model curtainwall systems is to model the frame in
THERM and WINDOW5, create a DOE2 report file - then import that file
into eQUEST and manually edit the frame width and conductance to match
what you calculated in WINDOW5/THERM.

Alex

 

Alex Krickx, LEED AP

Building Energy Specialist

 

1250 Elko Dr, Sunnyvale, CA 94089

(t) 408.541.8124

 

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immediately.

 

 

 

From: equest-users-bounces at lists.onebuilding.org [mailto:
equest-users-bounces at lists.onebuilding.org] On Behalf Of Carol Gardner
Sent: Thursday, May 05, 2011 4:43 PM
To: Mark Darrall
Cc: equest-users
Subject: Re: [Equest-users] Modeling regular curtain wall systems

 

Intriguing question. I did just a little looking around and found: 
windows.lbl.gov/software/NFRC/NFRCSim6.3-2010-Manual.pdf.
which is a link to the user manual for Window and Therm. Check it out.
You can create things, windows,etc., maybe even curtainwalls, using
Window and import them into eQUEST

Carol

On Thu, May 5, 2011 at 4:19 PM, Mark Darrall <MDarrall at a2so4.com> wrote:

Hi!

 

What's the best way to input a curtain wall system to allow for the
repetitive vertical mullions? I can calculate system U factor based on
the area of vision glass : overall area, but I don't see a way to input
that directly...unless:

 

If the vertical mullions are already captured in the system U factor can
I just ignore it and treat it like one huge picture window? So at
FRAME-WIDTH I would just enter the width and properties of the perimeter
frame and then at GLASS-CONDUCTANCE enter the corrected U-factor for the
system?

 

I did search this in onebuilding.org, but didn't see it addressed.

 

Thanks!

 

MARK DARRALL, AIA, LEED AP BD+C, NCARB
Senior Project Manager

 



 

DESIGN ENRICHING LIFE // LIFE ENRICHING DESIGN

 

A2SO4 Architecture, LLC

Union Station
300 South Meridian Street / 250
Indianapolis, Indiana 46225
TEL  317 388 8850 <tel:317%20388%208850> 

FAX  317 280 0692 <tel:317%20280%200692> 

MOB 765 749 0841 <tel:765%20749%200841> 
www.a2so4.com

 

Please consider the environment before printing this e-mail.  

 

CONFIDENTIALITY NOTICE: This email and any files transmitted with it are
confidential and intended solely for the use of the individual or entity
to which they are addressed. If you are not the intended recipient, you
may not review, copy or distribute this message. If you have received
this email in error, please notify the sender immediately and delete the
original message. Neither the sender nor the company for which he or she
works accepts any liability for any damage caused by any virus
transmitted by this email.

 


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-- 
Carol Gardner PE


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-- 

 

 

Arpan Bakshi  LEED AP BD+C

 

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