[Equest-users] Translucent Glass Overhangs?

[Sami, Vikram]

Neil,
That's a tough one. Frosted glass should probably not be used - apart from the glare issue. It will block heat gain only so far as the solar heat gain coefficient of the glass. Apart from that it will transmit - albeit in a scattered manner. Translucent glasses differ alarmingly compared to each other - so it's hard to generalize, but most translucent glass is directionally biased so most of what's transmitted will get through in more or less the same direction. Some of it might miss the window - depending on view factors.

Although this might be oversimplifying it, I would model it as a shade with transmittance equal to the SHGC of the glass - maybe factoring in a percentage to account for the scatter effect.


Vikram Sami, LEED AP BD+C
Sustainable Design Analyst
1315 Peachtree St. NE, Atlanta, GA 30309
t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com   www.perkinswill.com<http://www.perkinswill.com/>
Perkins+Will.  Ideas + buildings that honor the broader goals of society


From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Neil Bulger
Sent: Tuesday, January 17, 2012 1:32 PM
To: equest-users
Subject: [Equest-users] Translucent Glass Overhangs?

Hi everyone,

I have a building with frosted glass overhangs that are fairly large, about 10 feet out. I am only concerned with the energy component of my model and do not have any daylighting controls so this should make things easier. My gut tells me the frosted overhang will reduce and potentially eliminate the direct solar heat gain component. Has anyone studied this?

Thanks,

Neil Bulger
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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Sami, Vikram
Sent: Tuesday, January 17, 2012 7:20 AM
To: Pranita Kothuru Komirishetty; equest-users
Subject: Re: [Equest-users] Calculate energy usage of individual buildings in a campus

Pranita,
Could you create a secondary loop for each chiller? You could then get the numbers you need from the PS-D or PS-H report.


Vikram Sami, LEED AP BD+C
Sustainable Design Analyst
1315 Peachtree St. NE, Atlanta, GA 30309
t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com<mailto:vikram.sami at perkinswill.com>   www.perkinswill.com<http://www.perkinswill.com/>
Perkins+Will.  Ideas + buildings that honor the broader goals of society


From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Pranita Kothuru Komirishetty
Sent: Monday, January 16, 2012 6:08 PM
To: equest-users
Subject: [Equest-users] Calculate energy usage of individual buildings in a campus

Hello All -

I am modelling a campus in eQuest which has 7 building. All building are connected to the central chiller and boiler. I am trying to figure out how much of the chiller capacity each building is using from the chiller and how much of the boiler capacity each building is using.

Which reports in eQuest give this breakdown of eneryg usage? OR Do we have to calculate these number, if so please give a brief explanation.

Thank You.

--

- Pranita


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