EIRFTExtended Inversion-Recovery Fourier Transform
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Correcting the predicted cooling electric power from the nominal indoor coil entering air condition to the rated test condition using the CAPFT and EIRFT modifying curve brings down the prediction error in the range 0.
The VRF-system model, which is based on the outdoor coil performance, uses dual range CAPFT biquadratic capacity modifier curves for temperature, dual range CAPFT and EIRFT biquadratic electric power modifier curves for temperature, and dual range PFPLR cubic or quadratic electric power modifier curves for part-load ratio.
EIRFT = biquadratic EIR modifying curves as a function of temperature, (--)
The CAPFT and EIRFT performance are represented by dual range curves.