Dear All,

I'm trying to employ PI Perfromance Equation to create a 2-dimension interpolation, as showed below. Say, to get to know the exact "condenser pressure" when "thermal load of condenser" were set to be 40%, as where the red circle shows.

As for a 1-dimension interpolation I may utilize the "curve" function, where the arguments should be "numerical constants" referring to the manual. After getting 5 curves by the "curve" PE functions, how could I proceed to the 2-dimension interpolation?

Thanks!

ZYY

2018.11.16

You can try out bilinear interpolation using the AF Table Lookup Data Reference. You will need to create an AF Table with 3 columns as your reference.

Thermal Load, Efficiency (or Performance?),Condenser Pressure

Then you can feed in the Thermal Load and Efficiency in the Table Lookup DR to get your Pressure.

Please see this link for an example

PI Server