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[EnergyPlus_Support] very high U-value

Linda Lawrie,

For a simulation study, I defined the name and the layers of the floor
construction as shown in Table 1. I then entered the HF-C5 with the
properties listed in Table 2 into MATERIAL:REGULAR object of EnergyPlus
(Table 1).

Table1. CONSTRUCTION

Name        LTFLOOR
Outside Layer        HF-C5

Table2. MATERIAL:REGULAR

PROPERTIES        HF-C5
Roughness        Medium rough
Thickness (m)        0.1015
Conductivity (W/m-K)        1.7296
Density (kg/m3)        2243
Specific Heat (J/kg-K)        837
Absorptance: Thermal        0.9
Absorptance: Solar        0.65
Absorptance: Visible        0.65

I ran the simulation and EnergyPlus calculated the U value of the floor as
17.04. This value is very high and it does not seem to be right. What do
you think? I would like to know more about how EnergyPlus calculates the
U-values of floors. Where may I get this information from?
I would be glad if you could help me.
  
ps: the related .idf file is attached to this e-mail.
  
Thanks in advance for your reply,
Simge Andolsun



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