I have a CURVE-FIT question (yes, the same darn project). I am creating curve data for some Daikin VRV using the raw data. The capacity curves are no problem. The governing equation for cooling is: CAPt=Cooling-Capacity*COOL-CAP-FT (EWB,ODB). I have really good data tables that provide the capacity at about 6 entering web bulb temperatures and 20 outdoor dry bulb temperatures so I'm good to go there,. All the capacities have been normalized to the ARI conditions and the curves entered as BI-QUADRATIC-T. The problem I'm having is with the cooling EIR curves. The governing equation here is EIRt=COOLING-EIR*COOL-EIR-FT*(EWB,ODB)*COOL-EIR-FPLR (PLR). There is no handy example to refer to like there is for the capacity curves. At first I just proceeded as I did with the capacity curve data: called it a BI-QUADRATIC-T and normalized the EIRs as a function of the entering wet bulb and outdoor dry bulb to the ARI EIR. But what about the PLR? Isn't it a third independent variable? Has anyone had experience with this and if so please enlighten me as to what equation type did you use and how did you include the PLR. <br clear="all">
<br>-- <br>Carol Gardner PE<br>
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