EBK MUNSON, YOUNG AND OKIISHI'S FUNDAME
8th Edition
ISBN: 9781119547990
Author: HOCHSTEIN
Publisher: JOHN WILEY+SONS INC.
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Chapter 10.4, Problem 48P
To determine
The discharge of the channel.
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A counter flow double pipe heat exchanger is being used to cool hot oil from 320°F to 285°F
using cold water. The water, which flows through the inner tube, enters the heat exchanger at 70°F
and leaves at 175°F. The inner tube is ¾-std type L copper. The overall heat transfer coefficient
based on the outside diameter of the inner tube is 140 Btu/hr-ft2-°F. Design conditions call for a
total heat transfer duty (heat transfer rate between the two fluids) of 20,000 Btu/hr. Determine the
required length of this heat exchanger (ft).
!
Required information
A one-shell-pass and eight-tube-passes heat exchanger is used to heat glycerin (cp=0.60 Btu/lbm.°F) from 80°F to 140°F
by hot water (Cp = 1.0 Btu/lbm-°F) that enters the thin-walled 0.5-in-diameter tubes at 175°F and leaves at 120°F. The total
length of the tubes in the heat exchanger is 400 ft. The convection heat transfer coefficient is 4 Btu/h-ft²°F on the glycerin
(shell) side and 70 Btu/h-ft²°F on the water (tube) side.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
Determine the rate of heat transfer in the heat exchanger before any fouling occurs.
Correction factor F
1.0
10
0.9
0.8
R=4.0 3.0 2.0.15 1.0 0.8.0.6 0.4 0.2
0.7
0.6
R=
T1-T2
12-11
0.5
12-11
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
(a) One-shell pass and 2, 4, 6, etc. (any multiple of 2), tube passes
P=
T₁-11
The rate of heat transfer in the heat exchanger is
Btu/h.
!
Required information
Air at 25°C (cp=1006 J/kg.K) is to be heated to 58°C by hot oil at 80°C (cp = 2150 J/kg.K) in a cross-flow heat exchanger
with air mixed and oil unmixed. The product of heat transfer surface area and the overall heat transfer coefficient is 750
W/K and the mass flow rate of air is twice that of oil.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
Air
Oil
80°C
Determine the effectiveness of the heat exchanger.
Chapter 10 Solutions
EBK MUNSON, YOUNG AND OKIISHI'S FUNDAME
Ch. 10.2 - Prob. 1PCh. 10.2 - The flowrate per unit width in a wide channel is q...Ch. 10.2 - A rectangular channel 3 m wide carries 10 m3/s at...Ch. 10.2 - Prob. 4PCh. 10.2 - Prob. 5PCh. 10.2 - Prob. 6PCh. 10.2 - Prob. 7PCh. 10.2 - Prob. 8PCh. 10.2 - Prob. 9PCh. 10.2 - Prob. 10P
Ch. 10.2 - Prob. 11PCh. 10.3 - Water flows in a 10-m-wide open channel with a...Ch. 10.3 - Water flows in a 10-ft-wide rectangular channel...Ch. 10.3 - Water flows in a rectangular channel at a rate of...Ch. 10.3 - Water flows in a 5-ft-wide rectangular channel...Ch. 10.3 - Water flows over the bump in the bottom of the...Ch. 10.3 - Water in a rectangular channel flows into a...Ch. 10.3 - A channel has a rectangular cross section, a width...Ch. 10.3 - Prob. 19PCh. 10.3 - Prob. 20PCh. 10.3 - Prob. 23PCh. 10.3 - Prob. 24PCh. 10.3 - Prob. 25PCh. 10.3 - Prob. 26PCh. 10.3 - Prob. 27PCh. 10.3 - Prob. 28PCh. 10.3 - Prob. 29PCh. 10.4 - Water flows in a 5-m-wide channel with a speed...Ch. 10.4 - The following data are taken from measurements on...Ch. 10.4 - Prob. 32PCh. 10.4 - The following data are obtained for a particular...Ch. 10.4 - Prob. 34PCh. 10.4 - Prob. 35PCh. 10.4 - A 2-m-diameter pipe made of finished concrete lies...Ch. 10.4 - By what percent is the flowrate reduced in the...Ch. 10.4 - Prob. 38PCh. 10.4 - Prob. 39PCh. 10.4 - Prob. 40PCh. 10.4 - A trapezoidal channel with a bottom width of 3.0 m...Ch. 10.4 -
Water flows in a 2-m-diameter finished concrete...Ch. 10.4 - A round concrete storm sewer pipe used to carry...Ch. 10.4 - Find the discharge per unit width for a wide...Ch. 10.4 - Water flows down a wide rectangular channel having...Ch. 10.4 - Prob. 46PCh. 10.4 - Prob. 47PCh. 10.4 - Prob. 48PCh. 10.4 - Determine the flowrate for the symmetrical channel...Ch. 10.4 - (See The Wide World of Fluids article titled “Done...Ch. 10.4 - Prob. 51PCh. 10.4 - Prob. 52PCh. 10.4 - Prob. 53PCh. 10.4 - Prob. 54PCh. 10.4 - Prob. 55PCh. 10.4 - Prob. 56PCh. 10.4 - Prob. 57PCh. 10.4 - Prob. 58PCh. 10.4 - Prob. 59PCh. 10.4 - Prob. 60PCh. 10.4 - Prob. 61PCh. 10.4 - Prob. 62PCh. 10.4 - Prob. 63PCh. 10.4 - Water flows 1 m deep in a 2-m-wide finished...Ch. 10.4 - Uniform flow in a sluggish channel having a nearly...Ch. 10.4 - To prevent weeds from growing in a clean...Ch. 10.4 - Prob. 67PCh. 10.4 - Prob. 68PCh. 10.4 - Prob. 69PCh. 10.4 - Prob. 70PCh. 10.5 - Prob. 71PCh. 10.5 - Prob. 72PCh. 10.6 - Water flows upstream of a hydraulic jump with a...Ch. 10.6 - Prob. 75PCh. 10.6 - Prob. 76PCh. 10.6 - Prob. 77PCh. 10.6 - At a given location in a 12-ft-wide rectangular...Ch. 10.6 - Prob. 79PCh. 10.6 - Prob. 80PCh. 10.6 - Prob. 81PCh. 10.6 - A hydraulic engineer wants to analyze steady flow...Ch. 10.6 - Prob. 83PCh. 10.6 - A rectangular sharp-crested weir is used to...Ch. 10.6 - Prob. 85PCh. 10.6 - Prob. 87PCh. 10.6 - Prob. 88PCh. 10.6 - Prob. 89PCh. 10.6 - Prob. 90PCh. 10.6 - Prob. 91PCh. 10.7 - Prob. 1LLPCh. 10.7 - Prob. 2LLPCh. 10.7 - Prob. 3LLP
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