Question

The fractional hole area Fh, is defined as?

(a) (Hole diameter/hole pitch)^2

(b) K’ (hole pitch)^2

(c) K’ (hole diameter/hole pitch)^2

(d) (Hole diameter) ^2

The question was posed to me in my homework.

Question is from Tray Capacity Limits in chapter Tray Design and Operation of Distillation Design

Answer 1

The correct choice is (c) K’ (hole diameter/hole pitch)^2

Explanation: The fractional whole area on a sieve tray ranges from 0.05 to 0.15, this is given by K’ (hole diameter/hole pitch)^2  and does not vary.