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Re: [EnergyPlus_Support] Help



Possibly, but the very quick tests I did showed no noticeable difference when adding a zone with walls and a floor, compared to a roof surface and zone area x height. 
The benefit is a quick model of a roof, and it seems alright, but may look further given your opinion..



Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions
120 E. Pritchard St.  | Asheboro, NC 27203 
 | Mobile 503-688-8951
  





On Wed, Feb 19, 2014 at 12:42 PM, Joe Huang <YJHuang@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
 

Wouldn't that foul up the zone heat balance that depends on knowing the view factor or at least the area of each surface ?

Joe


On 2/19/2014 12:37 PM, Jeremiah Crossett wrote:
 
Depending on what you are doing, you might just as well ignore it-- for example if you want the surface to be fully adiabatic then you could remove it, and would get this warning. 
I have some models that are just roofs with zone area, ceiling height and internal loads per square foot-- and it seems to work as expected, but also produces this warning-  



Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions
120 E. Pritchard St.  | Asheboro, NC 27203 
 | Mobile 503-688-8951
  





On Wed, Feb 19, 2014 at 12:33 PM, Joe Huang <YJHuang@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
 

"Degenerate surfaces"  sound terrible!  Maybe you should go see a psychologist (just joking :-) )

Seriously, I suggest you search through your IDF, find the  seven surfaces with less than two vertices (which only define a line and not a surface), and add the missing vertices.

Joe




On 2/19/2014 11:58 AM, Oswaldo alonso Guzmán villalobos wrote:
 
Hellow, I try to simulate a building, when I simulate it, the energy plus gives the following message,

GetSurfaceData: There are 7 degenerate surfaces; Degenerate surfaces are those with number of sides < 3.

How fix this error?
Thanks.
 
Att. Oswaldo Alonso Guzmán Villalobos






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