Re: [EnergyPlus_Support] Tubular daylight device error.

[<linda@xxxxxxxxxxxxxx>]

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On Tue, 08 Jun 2010 02:32:58 -0000, "Phil" <philcook76@xxxxxxxxxxx> wrote:
> I am using DesignBuilder and I am using the advanced feature of
including
> an .idf file to allow me to use a Tubular Lightpipe. When I run it I get
> the following error which seems nonsensical. Any ideas why it is telling
me
> the area of the pipe and dome/diffuser are different whilst showing me
that
> they are the same? I have included the relevant section of .idf file
below.
> 
> It may have something to do with the fact that I am modelling the roof
as
> a plane with no ceiling and so the diffuser is in the roof plane, the
dome
> is above the roof plane and the transition zone is the room below the
roof
> as it is a single zone model.
> 
> Thanks,
> Phil.
>   
> 
> ___ERROR MESSAGE____
> 
>  ** Severe  ** DaylightingDevice:Tubular = PIPE1:  Pipe and
dome/diffuser
>  areas are significantly different.
>    **   ~~~   ** ...Pipe Area=[0.44]; Dome/Diffuser Area=[0.44].
> 
> 
> ___IDF FILE___
> 
> DaylightingDevice:Tubular,
> Pipe1, !- Object Name
> Dome1, !- Dome Name
> Diffuser1, !- Diffuser Name
> ReflectiveAluminum, !- Construction Name
> 0.750, !- Diameter [m] 
> 0.6, !- Total Length [m] (subtract zone lengths to get outdoor exposed
> length)
> 0.48, !- Effective Thermal Resistance [m2-K/W] between
TubularDaylightDome
> and
> 78, !- Transition Zone 1 Name
> ; !- Transition Zone 1 Length [m]
> 
> FenestrationSurface:Detailed,
> Dome1, !- Subsurface Name
> TubularDaylightDome, !- Surface Type
> ClearAcrylicDome, !- Construction Name (only 1 layer allowed in
> construction)
> R_78_5_0_0, !- Base Surface Name
> , !- Outside Face Environment (not allowed for TubularDaylightDome)
> 0.0, !- VF to Ground
> , !- Window Shading Control (not allowed for TubularDaylightDome)
> , !- Frame/Divider Name (not allowed for TubularDaylightDome)
> 1.0, !- Multiplier (must be 1.0 for TubularDaylightDome)
> 4, !- Number of Vertices
> -5.662723, -5.355330, 7.072746,
> -6.322723, -5.355330, 7.072746,
> -6.322723, -6.014425, 7.107302,
> -5.662723, -6.014425, 7.107302;
> 
> FenestrationSurface:Detailed,
> Diffuser1, !- Subsurface Name
> TubularDaylightDiffuser, !- Surface Type
> FrostedAcrylicDiffuser, !- Construction Name (only 1 layer allowed in
> construction)
> R_78_5_0_0, !- Base Surface Name
> , !- Outside Face Environment (not allowed for TubularDaylightDiffuser)
> 0.0, !- VF to Ground
> , !- Window Shading Control (not allowed for TubularDaylightDiffuser)
> , !- Frame/Divider Name (not allowed for TubularDaylightDiffuser)
> 1.0, !- Multiplier (must be 1.0 for TubularDaylightDiffuser)
> 4, !- Number of Vertices
> -5.662723, -5.355330, 6.872746,
> -6.322723, -5.355330, 6.872746,
> -6.322723, -6.014425, 6.907302,
> -5.662723, -6.014425, 6.907302;
> 
> 
> 
> ------------------------------------
> 
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> 


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