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[EnergyPlus_Support] Re: model non-standard building facade for thermal analysis

Hi,
thanks for your opinion. I suspected was hard...in that case I probably need to find a simplified calculation model that takes into account my geometry easily...especially for shadowing calculations; I will implement it in Java. Do you maybe now a good calc method I could look at for this problem (envelope thermal balance+shadowing)?


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Pedro Peixeiro <ppeixeiro@...> wrote:
>
> Hi Giulio.
> 
> In my opinion, will be hard to model such a frame. Windows in Eplus are 
> limited to 3 or 4 vertices. Modelling one hexagonal surface considering 
> it's a window is impossible. You can try to model each hexagonal as two 
> windows, but that way you would end up having an _extra frame right 
> across the hexagonal area_, and two window objects for each hexagonal 
> window (and if your total window will have that many hexagonal surfaces 
> as there is in your link, you're in for a lot of windows).  If for your 
> study you really need those frames in that geometry, honestly don't see 
> any other way to do it.
> 
> Pedro
> 
> 
> On 18-05-2011 12:49, artitecture82 wrote:
> >
> > Hi All,
> > Im new to E+ and I've usually run very basic analysis for thermal 
> > analysis of traditional building ... often approximated with boxes and 
> > few window.
> >
> > Im doing a personal research as part of my master thesis and Im 
> > interested to compare the performance of different facades tipologies 
> > and shapes. The goal of the analysis is given a climate and 
> > orientation for a typical vertical facade to understand the absorbed 
> > solar radiation and Temperature and Humidity at the interior boundary 
> > of the facade within closest zone. So single zone model.
> >
> > My question are these:
> > 1) Im interested to analyse the performance of the only exterior 
> > facade and not the whole building. Is that possible to model in E+ 
> > ..probably modelling the building as a single box volume and changing 
> > the parameter/geometry for the facade type I want to analyse?
> >
> > 2) The geometry input. The scope of the research is actually to 
> > understand impact of different shapes/self shading combined with some 
> > metrial properties. So standard flat plane doesnt wotrk in this case. 
> > Take a look at this pdf 
> > http://dl.dropbox.com/u/5212179/sampleEnvelope.pdf .
> > So typically I will have a frame structure (in this case hexagonal) 
> > and some glazing. Let say I find an automated process to convert the 
> > 3d model in E+ coordinates. The problem Im facing is how do you treat 
> > the frame? as a wall?
> > and do I need to assign orientation for each of the frame panel ?
> > I need to model the frame because for my assumptions it is important 
> > to understand the shading potential of facades I am going to study.
> >
> > Thank you very much in advance for the help and advice.
> >
> > Best,
> >
> > Giulio
> >
> >
>




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