[EnergyPlus_Support] Why Inside and Outside face temperaures for a floor surface are same ?

["qureshi.faran" <qureshi.faran@xxxxxxxxx>]

I have a building model with its floor having one insulation layer. The details are given below. My question is that the energy plus simulation shows me exactly the same temperatures for the Inside and the Outside face of this floor. I am expecting a difference due to insulation layer. How can this be explained ?





  BuildingSurface:Detailed,
    Zn001:Flr001,            !- Name
    Floor,                   !- Surface Type
    Slab Floor with Radiant, !- Construction Name
    ZONE ONE,                !- Zone Name
    Adiabatic,               !- Outside Boundary Condition
    ,                        !- Outside Boundary Condition Object
    NoSun,                   !- Sun Exposure
    NoWind,                  !- Wind Exposure
    1.000000,                !- View Factor to Ground
    4,                       !- Number of Vertices
    15.24000,0.000000,0.0,  !- X,Y,Z ==> Vertex 1 {m}
    0.000000,0.000000,0.0,  !- X,Y,Z ==> Vertex 2 {m}
    0.000000,15.24000,0.0,  !- X,Y,Z ==> Vertex 3 {m}
    15.24000,15.24000,0.0;  !- X,Y,Z ==> Vertex 4 {m}



  Material,
    INS - EXPANDED EXT POLYSTYRENE R12 2 IN,  !- Name
    Rough,                   !- Roughness
    5.0000001E-02,           !- Thickness {m}
    2.0000000E-02,           !- Conductivity {W/m-K}
    56.06000,                !- Density {kg/m3}
    1210.000,                !- Specific Heat {J/kg-K}
    0.9000000,               !- Thermal Absorptance
    0.5000000,               !- Solar Absorptance
    0.5000000;               !- Visible Absorptance



Construction:InternalSource,
    Slab Floor with Radiant, !- Name
    4,                       !- Source Present After Layer Number
    4,                       !- Temperature Calculation Requested After Layer Number
    1,                       !- Dimensions for the CTF Calculation
    0.1524,                  !- Tube Spacing {m}
    CONCRETE - DRIED SAND AND GRAVEL 4 IN,  !- Outside Layer
    INS - EXPANDED EXT POLYSTYRENE R12 2 IN,  !- Layer 2
    GYP1,                    !- Layer 3
    GYP2,                    !- Layer 4
    FINISH FLOORING - TILE 1 / 16 IN;  !- Layer 5







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