Application Guidelines for Using the GPDC Interpolation Charts

1 Application Guidelines for Using the GPDC Interpolation Charts 

Estimating Hood and pressure drop using the GPDC interpolation charts involves data interpolation and extrapolation within tiie framework of the generalized pressure drop correlation (GPDC) chart (Fig. 8.196 or c). This technique is expected to yield reliable estimates vdien appropriate data are available in the vicinity of the operating point. The reliability of the estimates will diminish with the extent to which extrapolation is required. Whenever extensive rapolation is required, the estimates are unreliable, and the calculation is best abandoned. 

Select the appropriate GPDC interpolation chart for the packii  

Using the operating conditions or design conditions, and the packing factor listed on the chart, determine the operating point on the interpolation chart. 

Check if data points in the vicinity of the operating point match the correlation. If so, obtain the pressure drop directly from the correlation curves, and go to 6 below. If not, proceed with 5. 

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