Fundamentals of Engineering Thermodynamics
8th Edition
ISBN: 9781118412930
Author: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey
Publisher: WILEY
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Chapter 11.9, Problem 21P
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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 11 Solutions
Fundamentals of Engineering Thermodynamics
Ch. 11.9 - Prob. 1ECh. 11.9 - Prob. 2ECh. 11.9 - 3. What is an advantage of using the Redlich–Kwong...Ch. 11.9 - To determine the specific volume of superheated...Ch. 11.9 - Prob. 5ECh. 11.9 - Prob. 6ECh. 11.9 - Prob. 7ECh. 11.9 - Prob. 8ECh. 11.9 - Prob. 9ECh. 11.9 - Prob. 10E
Ch. 11.9 - Prob. 11ECh. 11.9 - Prob. 12ECh. 11.9 - Prob. 13ECh. 11.9 - Prob. 14ECh. 11.9 - Prob. 15ECh. 11.9 - Prob. 1CUCh. 11.9 - Prob. 2CUCh. 11.9 - Prob. 3CUCh. 11.9 - 4. Evaluate the compressibility factor Z of water...Ch. 11.9 - Prob. 5CUCh. 11.9 - Prob. 6CUCh. 11.9 - Prob. 7CUCh. 11.9 - Prob. 8CUCh. 11.9 - 9. For an ideal gas obtain expressions for the (a)...Ch. 11.9 - Prob. 10CUCh. 11.9 - Prob. 11CUCh. 11.9 - Prob. 12CUCh. 11.9 - Prob. 14CUCh. 11.9 - Prob. 15CUCh. 11.9 - Prob. 16CUCh. 11.9 - Prob. 17CUCh. 11.9 - Prob. 18CUCh. 11.9 - Prob. 19CUCh. 11.9 - Repeat parts (a)–(d) of Example 11.1 if the carbon...Ch. 11.9 - Prob. 21CUCh. 11.9 - Prob. 22CUCh. 11.9 - Prob. 23CUCh. 11.9 - Prob. 24CUCh. 11.9 - Prob. 25CUCh. 11.9 - Prob. 26CUCh. 11.9 - Prob. 27CUCh. 11.9 - Prob. 28CUCh. 11.9 - Prob. 29CUCh. 11.9 - Prob. 30CUCh. 11.9 - Prob. 31CUCh. 11.9 - Prob. 32CUCh. 11.9 - Prob. 33CUCh. 11.9 - Prob. 34CUCh. 11.9 - Prob. 35CUCh. 11.9 - Prob. 36CUCh. 11.9 - Prob. 37CUCh. 11.9 - Prob. 38CUCh. 11.9 - Prob. 39CUCh. 11.9 - Prob. 40CUCh. 11.9 - Indicate whether the following statements are true...Ch. 11.9 - Prob. 42CUCh. 11.9 - Prob. 43CUCh. 11.9 - Prob. 44CUCh. 11.9 - Prob. 45CUCh. 11.9 - Prob. 46CUCh. 11.9 - Prob. 47CUCh. 11.9 - Prob. 48CUCh. 11.9 - Prob. 49CUCh. 11.9 - Prob. 50CUCh. 11.9 - Owing to safety requirements, the pressure within...Ch. 11.9 - Ten pounds mass of propane have a volume of 2 ft3...Ch. 11.9 - The pressure within a 23.3-m3 tank should not...Ch. 11.9 - Estimate the pressure of water vapor at a...Ch. 11.9 - Prob. 7PCh. 11.9 - A rigid lank contains 1 kg of oxygen (O2) at p1 =...Ch. 11.9 - Prob. 11PCh. 11.9 - Prob. 13PCh. 11.9 - Prob. 14PCh. 11.9 - Prob. 15PCh. 11.9 - Prob. 16PCh. 11.9 - Prob. 17PCh. 11.9 - Prob. 18PCh. 11.9 - Prob. 20PCh. 11.9 - Prob. 21PCh. 11.9 - Prob. 22PCh. 11.9 - Prob. 23PCh. 11.9 - Using Eq. 11.35. check the consistency of
the...Ch. 11.9 - Prob. 25PCh. 11.9 - Prob. 26PCh. 11.9 - A gas enters a compressor operating at steady...Ch. 11.9 - Prob. 28PCh. 11.9 - Prob. 29PCh. 11.9 - The Mollier diagram provides a graphical...Ch. 11.9 - Derive the relation cp = −T(∂2g/∂T2)p.
Evaluating...Ch. 11.9 - Prob. 32PCh. 11.9 - Prob. 33PCh. 11.9 - Prob. 34PCh. 11.9 - Prob. 35PCh. 11.9 - Prob. 36PCh. 11.9 - At 0°C, the specific volumes of saturated solid...Ch. 11.9 - Prob. 38PCh. 11.9 - Prob. 39PCh. 11.9 - Prob. 42PCh. 11.9 - Prob. 43PCh. 11.9 - Prob. 44PCh. 11.9 - Prob. 46PCh. 11.9 - Prob. 47PCh. 11.9 - Prob. 48PCh. 11.9 - Prob. 49PCh. 11.9 - Prob. 50PCh. 11.9 - Prob. 51PCh. 11.9 - Prob. 52PCh. 11.9 - Prob. 53PCh. 11.9 - Prob. 54PCh. 11.9 - Develop expressions for the volume expansivity β...Ch. 11.9 - Prob. 56PCh. 11.9 - Prob. 57PCh. 11.9 - Prob. 58PCh. 11.9 - Prob. 59PCh. 11.9 - Prob. 60PCh. 11.9 - Prob. 61PCh. 11.9 - Prob. 62PCh. 11.9 - If the value of the specific heat cυ of air is...Ch. 11.9 - Prob. 65PCh. 11.9 - Prob. 66PCh. 11.9 - Prob. 67PCh. 11.9 - Prob. 68PCh. 11.9 - Prob. 69PCh. 11.9 - Determine the maximum Joule-Thomson inversion...Ch. 11.9 - Prob. 71PCh. 11.9 - Show that Eq. 11.77 can be written as
Using this...Ch. 11.9 - If the specific heat cv of a gas obeying the van...Ch. 11.9 - Prob. 75PCh. 11.9 - Prob. 76PCh. 11.9 - Prob. 77PCh. 11.9 - Prob. 78PCh. 11.9 - Prob. 79PCh. 11.9 - Prob. 80PCh. 11.9 - Prob. 81PCh. 11.9 - Prob. 82PCh. 11.9 - Prob. 83PCh. 11.9 - Prob. 84PCh. 11.9 - Prob. 85PCh. 11.9 - Prob. 86PCh. 11.9 - Prob. 87PCh. 11.9 - Prob. 88PCh. 11.9 - Oxygen (O2) undergoes a throttling process from...Ch. 11.9 - Prob. 90PCh. 11.9 - Prob. 91PCh. 11.9 - Prob. 92PCh. 11.9 - Prob. 93PCh. 11.9 - Prob. 94PCh. 11.9 - Prob. 95PCh. 11.9 - Prob. 96PCh. 11.9 - Prob. 97PCh. 11.9 - Prob. 99PCh. 11.9 - Prob. 100PCh. 11.9 - Prob. 101PCh. 11.9 - Prob. 102PCh. 11.9 - A rigid vessel initially contains carbon dioxide...Ch. 11.9 - Prob. 104PCh. 11.9 - Prob. 105PCh. 11.9 - Prob. 106PCh. 11.9 - Prob. 107PCh. 11.9 - Prob. 108PCh. 11.9 - Determine the fugacity, in atm, for
butane at 555...Ch. 11.9 - Using the equation of state of Problem 11.14(c),...Ch. 11.9 - Prob. 111PCh. 11.9 - Prob. 113PCh. 11.9 - Prob. 114PCh. 11.9 - Prob. 115PCh. 11.9 - Prob. 116PCh. 11.9 - Prob. 117PCh. 11.9 - Prob. 118PCh. 11.9 - Prob. 119PCh. 11.9 - Prob. 120PCh. 11.9 - Prob. 121PCh. 11.9 - Prob. 122PCh. 11.9 - Prob. 123PCh. 11.9 - A tank contains a mixture of 75% argon and 25%...Ch. 11.9 - Prob. 125PCh. 11.9 - Prob. 126PCh. 11.9 - Prob. 127PCh. 11.9 - Prob. 128P
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