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Re: [EnergyPlus_Support] View Factor to Ground

Generally, when a floor or ceiling is upside down, as it is in this 
case, the problem can be fixed by reversing the order of the 
vertices.  Take the incorrect vertices 1,2,3,4 and rearrange them to 
be 4,3,2,1.  This should solve the problem.  

Also, use Report, Surfaces, Details; to review your surface tilts and 
azimuths.

Mike


On 11 Oct 2002, at 8:17, Linda Lawrie wrote:

> At 05:32 AM 10/11/2002, alexander.beisteiner@xxxxxxxxxxxxxxxxxx wrote:
> >Declaring the view factor to Ground for a floor as 1, what is defined
> in >the user manual, produces the following error message: > >    **
> Warning ** Floor Tilt=0.0, much less than expected tilt of 180, >for
> Surface=ZN01:FB, in Zone=TYPRAUMS
> 
> Having the View Factor to Ground as a value of 1.0 is not what is
> causing this error message. (Warning).
> 
> This is caused by geometry specification that then calculates a tilt
> of 0.0. (which is normal for roofs) rather than the "normal" for
> floors of 180.  This could be caused by viewing the floor coordinates
> from "inside" the surface (i.e. from inside the zone) rather than from
> the outside OR from incorrectly specifying the starting coordinate.
> 
> 
> Linda
> 
> EnergyPlus WebSite: http://www.energyplus.gov
> Owner: EnergyPlus_Support list
> Member: EnergyPlus Development Team
> 
> 



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