A shell-and-tube exchanger with two tube passes is used to heat ethanol from 60F to 140F with
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A shell-and-tube exchanger with two tube passes is used to heat ethanol from 60°F to 140°F with steam condensing at 230°F in the shell. The BWG 14 steel tubes are in. OD. The design overall coefficient (inside area) is 196 Btu/h·ft2 · °F, based on an assumed fouling coefficient of 1,000 Btu/h·ft2·°F and a steam film coefficient of 1,809 Btu/h·ft2.°F.
(a) If four tube passes were used, what would be the new overall coefficient?
(b) Estimate the new pressure drop if the tube length is unchanged and the calculated Δp for two tube passes was 140 lbƒ/ft2.
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a The new overall coefficient for four tube passes can be calculated using the following e...View the full answer
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Related Book For 
Unit Operations Of Chemical Engineering
ISBN: 9780072848236
7th Edition
Authors: Warren McCabe, Julian Smith, Peter Harriott
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