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Re: [EnergyPlus_Support] Sphere Building



This question of modeling spheres or domes seems to appear with sufficient regularity that
perhaps  someone should write a FAQ about it :-)

For those willing to "dig in the weeds", i.e., calculating vertices and directly writing the IDF,
I offer an awk script I wrote back in 2002 to do the same thing in DOE-2.1E.  You will have
to change the output syntax as per EnergyPlus, but the mathematics should be exactly the same.

Following is what I posted on EnergyPlus_Support back in Feb 17, 2011:
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 
have to be planar, so I don't see how pie slices would work,
unless they're 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”




Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx
http://weather.whiteboxtechnologies.com for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"

On 7/19/2013 12:06 PM, prln@xxxxxxxxxx wrote:
 
Hello, everyone!
 
EnergyPlus could simulate a sphere format building, like a planetarium dome?
 
Thanks a lot!
 
Paulo Roberto.


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