[Equest-users] Modeling regular curtain wall systems

[Arpan Bakshi]

Sounds like a good compromise. I'm concerned the corner zones would  
take on the brunt of the frame/glass disparity, creating a large  
contrast of skin loads on the perimeter.



Arpan Bakshi, LEED AP BD+C
YRG sustainability

On May 6, 2011, at 8:35 AM, "Bishop, Bill" <wbishop at pathfinder-ea.com>  
wrote:

> 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
>
>
>
> <image003.jpg>
>
>
>
> 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 b 
> asis of design information for both the curtain wall and glazing – c 
> an I use manufacturer’s design guide graphs and calculations? The gr 
> aphs 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 f 
> or the frames and not just getting COG.
>
>
>
> Take care!
>
>
>
> MARK DARRALL, AIA, LEED AP BD+C, NCARB
> Senior Project Manager
>
>
>
> <image004.jpg>
>
>
>
> DESIGN ENRICHING LIFE // LIFE ENRICHING DESIGN
>
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>
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>
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>
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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 d 
> ata. I think the best way to model curtainwall systems is to model t 
> he frame in THERM and WINDOW5, create a DOE2 report file – then impo 
> rt that file into eQUEST and manually edit the frame width and condu 
> ctance to match what you calculated in WINDOW5/THERM.
>
> Alex
>
>
>
> Alex Krickx, LEED AP
>
> Building Energy Specialist
>
> <image005.jpg>
>
> 1250 Elko Dr, Sunnyvale, CA 94089
>
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> 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
>
>
>
> <image004.jpg>
>
>
>
> DESIGN ENRICHING LIFE // LIFE ENRICHING DESIGN
>
>
>
> A2SO4 Architecture, LLC
>
> Union Station
> 300 South Meridian Street / 250
> Indianapolis, Indiana 46225
> TEL  317 388 8850
>
> FAX  317 280 0692
>
> MOB 765 749 0841
> www.a2so4.com
>
>
>
> Please consider the environment before printing this e-mail.
>
>
>
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> -- 
> Carol Gardner PE
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> --
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>
> Arpan Bakshi  LEED AP BD+C
>
>
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