3. 15,000 lb/h of benzene will be heated from 80 °F to 120 °F by cooling a stream of ortho-toluidin (C7H9N) from 160 °F to 100 °F. Inlet pressures are 40 psia for ortho-toluidine and 50 psia fo benzene. A maximum pressure drop of 15 psia is specified for each stream. A number of used carbon steel hairpins are available for this service. The hairpins are each 20 ft long with 3-in. schedule 40 outer pipe, 1.5- in. un-finned schedule 40 inner pipe, internal return bends and 2-in. schedule 40 Ortho-toluidine property Cp (Btu/lbm °F) . k (Btu/h ft °F) . & (cp) p (lbm/ft³) . Value at 130°F 0.48 0.081 1.85 60.5 265
3. 15,000 lb/h of benzene will be heated from 80 °F to 120 °F by cooling a stream of ortho-toluidin (C7H9N) from 160 °F to 100 °F. Inlet pressures are 40 psia for ortho-toluidine and 50 psia fo benzene. A maximum pressure drop of 15 psia is specified for each stream. A number of used carbon steel hairpins are available for this service. The hairpins are each 20 ft long with 3-in. schedule 40 outer pipe, 1.5- in. un-finned schedule 40 inner pipe, internal return bends and 2-in. schedule 40 Ortho-toluidine property Cp (Btu/lbm °F) . k (Btu/h ft °F) . & (cp) p (lbm/ft³) . Value at 130°F 0.48 0.081 1.85 60.5 265
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:3. 15,000 lb/h of benzene will be heated from 80 °F to 120 °F by cooling a stream of ortho-toluidin
(C7H9N) from 160 °F to 100 °F. Inlet pressures are 40 psia for ortho-toluidine and 50 psia fo
benzene. A maximum pressure drop of 15
psia is specified for each stream. A number
of used carbon steel hairpins are available
for this service. The hairpins are each 20 ft
long with 3-in. schedule 40 outer pipe, 1.5-
in. un-finned schedule 40 inner pipe,
internal return bends and 2-in. schedule 40
nozzles. Properties of ortho-toluidine at
130 °F are given below. Determine the
number and configuration of hairpins
required for this service
Ortho-toluidine property
Cp (Btu/lbm °F)
k (Btu/h ft. °F)
u (ср)
p (lbm/ft³)
Pr
.
logio μ(cp) 1085.1 (T(K)
T(K) 356.46,
Value at 130°F
0.48
0.081
1.85
60.5
26.5
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