(a) Calculate the internal pressure drop for an oxygen-nitrogen hollow-fiber separator that has 600 pm outside diameter and 400 pm inside diameter fibers 1.0 m long. When P, = 75Ibf /in.' abs and P, = l5Ibf /in.' abs, the permeate flux is 2.0 L/min-m'.
(b) What would be the internal pressure drop for L = 5 m?