When I read the Pmv-Ppd values in the Energyplus program, I get values that do not fit the Fanger equation. For example, PMV is -0.3, PPD is 33% or PMV is -0.5, PPD is 38%. Do you think these results are correct?
Hi!
Could you provide more details about the problem?
I just checked with a simulation using the "RefBldgSmallOfficeNew2004_Chicago.idf" in the example files and "USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.epw" weather file that comes with the EnergyPlus v9.4 installation.
I think the EnergyPlus calculated value for PPD agrees with the Fanger equation (same equation in the EnergyPlus code here) with the maximum percentage error being 21%. For a PMV value of -0.30006, the PPD by EnergyPlus was 6.87, and the error in PPD calculation was 2.15E-06% which is very small.
Maybe we could help you if we got more details.
EnergyPlus PMV and PPD are right.
Just for information, they are referred to the previous calculation time step than reported. Therefore when reading simulaiton outputs, PMV/PPD values are calculated with reference to previous timestep MTA, MTR, VEL, RH, CLO and MET values
Comments
through the calculate,I think it's wrong.the formula is PDD=100-95exp(-0.03353PMV^4-0.2179*PMV^2).but my PSS value isn't from the energyplus I did the calculations myself