[EnergyPlus_Support] Earth Tubes

["roberturban4848" <urban.48@xxxxxxxxx>]

I'm trying to model an earth tube in a basic residential house. I used the "EarthTubeSimpleTest" example file as a template and connected it to the living zone of the house. However, it is not having any impact on the simulation. I've changed the parameters and it doesn't affect it at all. This is how I have it set up (I ran CalcSoilSurfTemp to get the soil numbers). Any suggestions?

  ZoneEarthtube,
    LIVING ZONE,             !- Zone Name
    ON,                      !- Schedule Name
    1.0,                     !- Design Flow Rate {m3/s}
    -10.0,                   !- Minimum Zone Temperature when Cooling {C}
    30.0,                    !- Maximum Zone Temperature when Heating {C}
    0.1,                     !- Delta Temperature {deltaC}
    NATURAL,                 !- EarthTube Type
    0.0,                     !- Fan Pressure Rise (Pa)
    1.0,                     !- Fan Total Efficiency
    0.35,                    !- Pipe Radius {m}
    0.01,                    !- Pipe Thickness {m}
    100.0,                   !- Pipe Length {m}
    50.0,                    !- Pipe Thermal Conductivity {W/m-K}
    3,                       !- Pipe Depth Under Ground Surface {m}
    HeavyAndDamp,            !- Soil Condition
    11.4,                    !- Average Soil Surface Temperature {C}
    17.2,                    !- Amplitude of Soil Surface Temperature {C}
    49,                      !- Phase Constant of Soil Surface Temperature {days}
    0.6060000,               !- Constant Term Flow Coefficient
    2.0199999E-02,           !- Temperature Term Flow Coefficient
    5.9800001E-04,           !- Velocity Term Flow Coefficient
    0.0000000E+00;           !- Velocity Squared Term Flow Coefficient



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