001165 lbfft or 0001165322 00375 lbms2 weber number

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: .52 (continued) Analysis: (c) at the top of the column (continued) HL = 0.174 1 = 0.117 m 1.485 From Eq. (6-132), for Montz, using SI units, 1 1 HL = CL 12 = 0.0253 1/ 6 4hL DL au L m 1/ 2 uL a a 1 1 = 1.165 12 aPh 1/ 6 4(0.0241)(0.930) (3.0 10-9 )(300)(0.00180) 1/ 2 0.00180 300 a aPh a aPh To compute (aPh /a), we need for the liquid phase, the Reynolds, Weber, and Froude numbers from equations (6-138), (6-139), and (6-140), respectively, based on the packing hydraulic diameter from (6-137). d h = packing hydraulic diameter = 4 0.930 =4 = 0.0124 m = 0.0407 ft a 300 Reynolds number = N ReL ,h = uL d h L (0.00591)(0.0407)(48) = = 49.1 L [(0.35)(0.000672)] Weber number = N WeL ,h = 2 u L L d h ( 0.00898 ) (48)(0.407) = = 0.00421 0.0375 2 2 Froude number = N FrL ,h ( 0.00898) = 0.0000615 u2 = L = gd h 32.2(0.0407) From (6-136), aPh -1/ 2 = 1.5 ( ad h ) N Re L ,h a = 1.5 [ (300)(0.0124)] ( ) (N -0.2 We L , h ) (N ) 0.75 FrL , h -0.45 -1/ 2 ( 49.1) ( 0.00421) ( 0.0000615 ) -0.2 0.75 -0.45 = 0.47 HL = 0.0253 1 = 0.054 m 0.47 Exe...
View Full Document

Ask a homework question - tutors are online