51 for nor pac h og h g h l 069 133050 136

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Unformatted text preview: ference, y*-y is almost constant at an average value of approximately 0.065. Therefore, (NOG)RS = y/( y*-y) = (0.915-0.64)/0.065 = 4.2. Therefore, Packed height for NOR PAC = (1.5)(4.2) = 6.3 ft Packed height for Montz = (0.68)(4.2) = 2.9 ft For the stripping section, after accounting for the partial reboiler, the limits on y from the bottom to the feed are 0.05 to 0.68. The difference, y*-y varies from 0.12 at y = 0.05, to 0.23 at y = 0.17, to 0.19 at y = 0.40, to 0.09 at y = 0.59, to 0.03 at y = 0.68 Using the trapezoidal method to solve the integral, y (0.17 - 0.05) (0.40 - 017) 0.59 - 0.40 (0.68 - 0.59) . N OG RS = = + + + = 4.6 y *-y 0175 . 0.21 014 . 0.06 Analysis: (d) (continued) Exercise 7.52 (continued) Packed height for NOR PAC = (4.4)(4.6) = 20.2 ft Packed height for Montz = (0.45)(4.6) = 2.1 ft The total packed height for both sections are: 6.3 + 20.2 = 26.5 ft for NOR PAC 2.9 + 2.1 = 5.0 ft for Montz However, these heights are approximate because they are based on values of H...
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