Re: [EnergyPlus_Support] Fins that are mirrors...

[Jason Kirkpatrick <jason.alan.kirkpatrick@xxxxxxxxx>]

Gerard,

Be sure to change the  solar distribution in the 'Building' object to FullExteriorWithReflections or FullInteriorandExteriorWithReflections

You should be able to set the shadings reflectance in the 'material' object that you have used to define the shade. 

Material,
    F08 Metal surface,       !- Name
    Smooth,                !- Roughness
    0.0008,                  !- Thickness {m}
    45.28,                    !- Conductivity {W/m-K}
    7824,                     !- Density {kg/m3}
    500,                        !- Specific Heat {J/kg-K}
    0.90,                       ! Thermal Absorptance
    0.3,                         ! Solar Absorptance
    0.3;                         ! Visible Absorptance

Where reflectance = 1 -  absorptance

The ShadingProperty:Refectance can also be used to redefine the properties for the material, but you still need to have the 'WithReflections' solar distribution option.  Possibly you mistyped 'ShadingProperty:Reflectance' as 'SurfaceProperty:Reflectance' but that should have resulted in a fatal error.

Hope this helps,

Jason

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