Re: [EnergyPlus_Support] modelling a dome

[Joe Huang <YJHuang@xxxxxxxxxxxxxxxxxxxxxxxx>]

The title of your post caught my eye, because I worked on the same 
problem, i.e., modeling a dome, nine years ago, although I was doing it 
in DOE-2, rather than EnergyPlus.

As far as I know, all surfaces in any building energy simulation program 
has to be planar, so I don't see how a pie slice would work,
unless it's automatically decomposed by OpenStudio into planar polygons.

What I did was to write an awk program that decomposes a hemispheric
dome with a given radius into a collection of polygons. It's written up 
in an old DOE-2 User News article. See pp. 18-19 in

http://gundog.lbl.gov/dirun/23s_o_1.pdf

You would have to modify the program to output IDF instead of BDL,
but the fundamental math should still work.

Joe

Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
(o) 925-388-0265
(c) 510-928-2683
yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx
www.whiteboxtechnologies.com
“Building energy simulations at your fingertips”



On 2/16/2011 1:05 PM, coy_mllr wrote:
> Hi, I am trying to model a large dome structure in energyplus using
> openstudio. Thus far, I have been unsuccessfull. It seems openstudio has
> issues identifying the dome surface as a roof. The program designates
> one -pie slice- of the dome as a wall. then, when I load the idf into EP
> launch and run an analysis, energyplus seems to register the -pie slice-
> as an opening. Is it possible to model a dome in e-plus using open
> studio? Any suggestions?
>
> Thank You!
>
> Coy
>
> CH2M Hill - intern
> OIT Renewable Energy Engineering - student
>
> 


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