Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
If you have performance data from the manufacturer the EnergyPlus CurveFitTool.xlsm can be used to derive the performance curve coefficients. The tool can be found in:
C:\EnergyPlusV8-6-0\PreProcess\HVACCurveFitTool
or
C:\Program Files\OpenStudio 1.13.0\share\openstudio\EnergyPlus-8-6-0\PreProcess\HVACCurveFitTool
These coefficients can then be entered into the fields of the biquadratic and quadratic curves associated with a ChillerElectricEIR object in OpenStudio.
If you'd like to visualize the curves, I've added the the charts from the COMNET Appendix H - Equipment Curves spreadsheet to the EnergyPlus CurveFitTool, to create an Improved CurveFitTool, which I've committed to my GitHub fork.
