Calculate the plate efficiency for the plate design considered in Examples 11.6 and 11.7, using Van Winkle’s correlation.

Data from example 11.6 

Design the plates for the column specified in Example 11.2. Take the minimum feed rate as 70 per cent of the maximum (maximum feed 10,000 kg/h). Use sieve plates.

Data from example 11.7

For the plate design in Example 11.6, estimate the plate efficiency for the plate on which the concentration of acetone is 5 mol per cent. Use the AIChE method.