[Equest-users] Modeling a pergola

[Nick Caton]

Sure thing,

 

Building shades are defined after this wizards, in detailed mode.  I'd suggest ignoring the pergoda and define the rest of your building in the wizards first.  Once in detailed mode, you may choose to either 

1.       define the pergoda simply as a single horizontal building shade with a transmittance value > 0, and optionally define a fractional schedule to that transmittance to account for how the sun's angle might change that value through the day, or

2.       define a more complex series of shades with 0 transmissivity, matching the structural shapes of your actual members.  Expect this approach to take an exponentially longer time.  

 

In either case, you define a building shade by right-clicking the project line at the top of the component tree, and selecting New... à building shade.  You'll be prompted for some starting dimensions and from there you can switch to 3D view and modify that shade's properties with a visual reference behind the window, allowing you to accurately place/rotate the shade.  If you want a shade with something more nuanced than a rectangle, search the archives for a mini guide titled " Simple Building Shade Question" by me. 

 

I'd strongly suggest the first route.  The impact of the additional modeled accuracy on the energy consumption of a 6-story structure I suspect would be minimal.  The goal of any eQuest model is first and foremost as an energy model - if you want a pretty picture, there are much better programs for 3D modeling available that can generate much prettier results.

 

 

~Nick

 

 

NICK CATON, E.I.T.

PROJECT ENGINEER

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

Check out our new web-site @ www.smithboucher.com 

 

From: aida darghouth asli [mailto:darghouthasli.aida at gmail.com] 
Sent: Friday, November 05, 2010 2:03 PM
To: Nick Caton
Subject: Re: [Equest-users] Modeling a pergola

 

Hi Nick,

I would like to thank you for your prompt reply.

Actually i have not began by drawing the roof but i have drawn all the floors and the basements, my building is 2b+M+3, and i am currently trying to draw the roof of the terrace wich is a pergola but as I told you it is very complicated, regarding the seris of building shades, could you give me more oversight about this technique and thak you again.

 

DAKA

2010/11/5 Nick Caton <ncaton at smithboucher.com>

Hi Daka,

 

You'll have to excuse my lack of architectural vocabulary, but if your roof is a "pergola" like the ones that come up under a google image search <http://www.google.com/images?q=pergola&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&source=og&sa=N&hl=en&tab=wi&biw=1482&bih=842> , an open to the air structure for hanging pretty vines and such...

 

I'd question why you're modeling it as a roof to begin with.  If that structure is on top of a roof or adjacent to your building, I'd model a series of building shades.  I'd account for any conditioning equipment (IR heater, fans) as process loads.  If it's remote from a building without any conditioning equipment... why are you trying to make an energy model of it?

 

~Nick

 



 

NICK CATON, E.I.T.

PROJECT ENGINEER

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

Check out our new web-site @ www.smithboucher.com <http://www.smithboucher.com>  

 

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Darghouth Asli Aida
Sent: Friday, November 05, 2010 1:05 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Modeling a pergola

 

Dear all,

I have a problem with the modeling of the roof of my building since it is a pergola, the problem is that the pergola  is very complicated and Equest allows me to draw only one form besides the limit of vertices in eQUEST is only 120, so what should I do?

Any suggestion is welcomed.

Thank you.

 

DAKA

 

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