Repeat Problems 10.D13 and 10.D13 using the two-enthalpy feed method in which a portion of the feed
Question:
Repeat Problems 10.D13 and 10.D13 using the two-enthalpy feed method in which a portion of the feed is condensed to a saturated liquid and the remainder is still a saturated vapor. Select the amount of feed to condense so that the column has pinch points at minimum reflux at both the liquid and the vapor feed simultaneously. Use the same multiplier, M, as in Problem 10.D13. Compare the diameter of this column to the diameter of \(10.27 \mathrm{ft}\) calculated for Problem 10.D9 and to the diameter calculated for Problem 10.D13. Calculate the ratio \(\mathrm{Q}_{\mathrm{R}, 2 \text {-enthalpy_feed }} / \mathrm{Q}_{\mathrm{R}, \text { vapor_feed }}\) for this problem.
Problems 10.D13
Repeat Problem 10.D9, calculating the diameter at the top, but condense the feed to a saturated liquid. Determine \((\mathrm{L} / \mathrm{D})_{\min }\) and \(\mathrm{L} / \mathrm{D}=\) \(1.43 \times(\mathrm{L} / \mathrm{D})_{\text {min }}\). Compare the diameter of this column to the diameter of \(10.27 \mathrm{ft}\) calculated for Problem 10.D9. Calculate the ratio \(Q_{R, \text { liquid_feed }} / Q_{R, \text { vapor_feed }}\) for this problem.
Problem 10.D9
Table 2-3
Table 2-8
Step by Step Answer:
Separation Process Engineering Includes Mass Transfer Analysis
ISBN: 9780137468041
5th Edition
Authors: Phillip Wankat