FUND OF ENGINEERING THERMO W/WILEY PLU
8th Edition
ISBN: 9781119391630
Author: MORAN
Publisher: WILEY
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Chapter 6.13, Problem 2E
To determine
The nature of entropy for an isolated system.
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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 6 Solutions
FUND OF ENGINEERING THERMO W/WILEY PLU
Ch. 6.13 - Prob. 1ECh. 6.13 - Prob. 2ECh. 6.13 - Prob. 3ECh. 6.13 - Prob. 4ECh. 6.13 - Prob. 5ECh. 6.13 - 6. Is entropy produced within a system undergoing...Ch. 6.13 - 7. When a mixture of olive oil and vinegar...Ch. 6.13 - Prob. 8ECh. 6.13 - Prob. 9ECh. 6.13 - 10. Is Eq. 6.51a restricted to adiabatic processes...
Ch. 6.13 - Prob. 11ECh. 6.13 - 12. What is the ENERGY STAR® program?
Ch. 6.13 - Prob. 1CUCh. 6.13 - Prob. 2CUCh. 6.13 - Prob. 3CUCh. 6.13 - Prob. 4CUCh. 6.13 - Prob. 5CUCh. 6.13 - For Problems 1–6, a closed system undergoes a...Ch. 6.13 - For Problems 7–10, a gas flows through a...Ch. 6.13 - Prob. 8CUCh. 6.13 - Prob. 9CUCh. 6.13 - For Problems 7–10, a gas flows through a...Ch. 6.13 - Prob. 11CUCh. 6.13 - Prob. 12CUCh. 6.13 - Prob. 13CUCh. 6.13 - 14. A closed system undergoes a process for which...Ch. 6.13 - 15. Show that for phase change of water from...Ch. 6.13 - Prob. 16CUCh. 6.13 - Prob. 17CUCh. 6.13 - Prob. 18CUCh. 6.13 - Prob. 19CUCh. 6.13 - Prob. 20CUCh. 6.13 - Prob. 21CUCh. 6.13 - Prob. 22CUCh. 6.13 - Prob. 23CUCh. 6.13 - Prob. 24CUCh. 6.13 - Prob. 25CUCh. 6.13 - Prob. 26CUCh. 6.13 - Prob. 27CUCh. 6.13 - 28. Briefly explain the notion of microscopic...Ch. 6.13 - Prob. 29CUCh. 6.13 - Prob. 30CUCh. 6.13 - Prob. 31CUCh. 6.13 - Prob. 32CUCh. 6.13 - Prob. 33CUCh. 6.13 - Prob. 34CUCh. 6.13 - Prob. 35CUCh. 6.13 - 36. A closed system can experience a decrease in...Ch. 6.13 - 37. Entropy is produced in every internally...Ch. 6.13 - Prob. 38CUCh. 6.13 - Prob. 39CUCh. 6.13 - Prob. 40CUCh. 6.13 - Prob. 41CUCh. 6.13 - Prob. 42CUCh. 6.13 - Prob. 43CUCh. 6.13 - Prob. 44CUCh. 6.13 - Prob. 45CUCh. 6.13 - Prob. 46CUCh. 6.13 - Prob. 47CUCh. 6.13 - Prob. 48CUCh. 6.13 - Prob. 49CUCh. 6.13 - Prob. 50CUCh. 6.13 - 51. The increase of entropy principle states that...Ch. 6.13 - Prob. 52CUCh. 6.13 - Prob. 53CUCh. 6.13 - Prob. 54CUCh. 6.13 - 55. When a system undergoes a Carnot cycle, no...Ch. 6.13 - Prob. 1PCh. 6.13 - Prob. 2PCh. 6.13 - Prob. 3PCh. 6.13 - 6.4 Using the appropriate tables, determine the...Ch. 6.13 -
6.7 Using steam table data, determine the...Ch. 6.13 - 6.8 Using the appropriate table, determine the...Ch. 6.13 - Prob. 10PCh. 6.13 - 6.11 Air in a piston–cylinder assembly undergoes a...Ch. 6.13 - 6.12 Water contained in a closed, rigid tank,...Ch. 6.13 - Prob. 13PCh. 6.13 - 6.14 Five kg of nitrogen (N2) undergoes a process...Ch. 6.13 - Prob. 15PCh. 6.13 - Prob. 16PCh. 6.13 - Prob. 17PCh. 6.13 - 6.18 Steam enters a turbine operating at steady...Ch. 6.13 - Prob. 19PCh. 6.13 - 6.20 One kg of water in a piston–cylinder assembly...Ch. 6.13 - Prob. 21PCh. 6.13 - 6.22 A system consisting of 2 kg of water...Ch. 6.13 - Prob. 23PCh. 6.13 - 6.24 A gas within a piston–cylinder assembly...Ch. 6.13 - Prob. 25PCh. 6.13 - 6.26 A gas initially at 2.8 bar and 60°C is...Ch. 6.13 - Prob. 27PCh. 6.13 - Prob. 28PCh. 6.13 - Prob. 29PCh. 6.13 - Prob. 30PCh. 6.13 - Prob. 31PCh. 6.13 - Prob. 32PCh. 6.13 - 6.33 Air in a piston–cylinder assembly undergoes a...Ch. 6.13 - Prob. 34PCh. 6.13 - Prob. 35PCh. 6.13 - Prob. 36PCh. 6.13 - 6.37 Two m3 of air in a rigid, insulated container...Ch. 6.13 - Prob. 38PCh. 6.13 - 6.39 Air contained in a rigid, insulated tank...Ch. 6.13 - 6.40 Air contained in a rigid, insulated tank...Ch. 6.13 - 6.41 Air contained in a rigid, insulated tank...Ch. 6.13 - Prob. 42PCh. 6.13 - Prob. 43PCh. 6.13 - Prob. 44PCh. 6.13 - 6.45 Steam undergoes an adiabatic expansion in a...Ch. 6.13 - 6.46 Two kg of air contained in a piston-cylinder...Ch. 6.13 - Prob. 47PCh. 6.13 - Prob. 48PCh. 6.13 - 6.49 One kg of air contained in a piston-cylinder...Ch. 6.13 - Prob. 50PCh. 6.13 - Prob. 51PCh. 6.13 - Prob. 52PCh. 6.13 - Prob. 53PCh. 6.13 - Prob. 54PCh. 6.13 - 6.55 For the silicon chip of Example 2.5....Ch. 6.13 - Prob. 56PCh. 6.13 - Prob. 57PCh. 6.13 - Prob. 58PCh. 6.13 - Prob. 59PCh. 6.13 - Prob. 60PCh. 6.13 - 6.61 A 2.64-kg copper part, initially at 400 K, is...Ch. 6.13 - Prob. 62PCh. 6.13 - Prob. 63PCh. 6.13 - 6.64 As shown in Fig. P6.64, an insulated box is...Ch. 6.13 - Prob. 68PCh. 6.13 - Prob. 69PCh. 6.13 - Prob. 70PCh. 6.13 - Prob. 71PCh. 6.13 - Prob. 72PCh. 6.13 - Prob. 73PCh. 6.13 - Prob. 74PCh. 6.13 - Prob. 75PCh. 6.13 - Prob. 76PCh. 6.13 - Prob. 77PCh. 6.13 - Prob. 79PCh. 6.13 - 6.80 Water at 20 bar, 400°C enters a turbine...Ch. 6.13 - Prob. 81PCh. 6.13 - Prob. 82PCh. 6.13 - Prob. 83PCh. 6.13 - Prob. 84PCh. 6.13 - Prob. 85PCh. 6.13 - 6.86 Steam enters a well-insulated nozzle...Ch. 6.13 - Prob. 87PCh. 6.13 - 6.88 An open feedwater heater is a direct-contact...Ch. 6.13 - Prob. 89PCh. 6.13 - 6.90 Air at 600 kPa, 330 K enters a...Ch. 6.13 - Prob. 91PCh. 6.13 - Prob. 92PCh. 6.13 - Prob. 93PCh. 6.13 - Prob. 94PCh. 6.13 - Prob. 95PCh. 6.13 - Prob. 96PCh. 6.13 - Prob. 97PCh. 6.13 - Prob. 98PCh. 6.13 - 6.99 Ammonia enters the compressor of an...Ch. 6.13 - Prob. 100PCh. 6.13 - Prob. 101PCh. 6.13 - 6.102 Steam enters a turbine operating at steady...Ch. 6.13 - 6.103 Refrigerant 134a is compressed from 2 bar,...Ch. 6.13 - Prob. 104PCh. 6.13 - Prob. 105PCh. 6.13 - Prob. 106PCh. 6.13 - Prob. 107PCh. 6.13 - Prob. 108PCh. 6.13 - 6.109 Determine the rates of entropy production,...Ch. 6.13 - Prob. 110PCh. 6.13 - Prob. 111PCh. 6.13 - 6.112 Air as an ideal gas flows through the...Ch. 6.13 - 6.113 A rigid, insulated tank whose volume is 10 L...Ch. 6.13 - Prob. 114PCh. 6.13 - Prob. 115PCh. 6.13 - Prob. 116PCh. 6.13 - Prob. 117PCh. 6.13 - 6.118 Air in a piston–cylinder assembly expands...Ch. 6.13 - Prob. 119PCh. 6.13 - 6.120 Steam undergoes an isentropic compression in...Ch. 6.13 - Prob. 121PCh. 6.13 - Prob. 122PCh. 6.13 - Prob. 123PCh. 6.13 - 6.124 Air within a piston–cylinder assembly,...Ch. 6.13 - Prob. 125PCh. 6.13 - Prob. 127PCh. 6.13 - 6.128 A rigid, insulated tank with a volume of 20...Ch. 6.13 - 6.129 A rigid, insulated tank with a volume of...Ch. 6.13 - Prob. 130PCh. 6.13 - Prob. 131PCh. 6.13 - Prob. 132PCh. 6.13 - 6.133 Figure P6.133 shows a simple vapor power...Ch. 6.13 - Prob. 134PCh. 6.13 - Prob. 135PCh. 6.13 - Prob. 136PCh. 6.13 - 6.137 Air at 1600 K, 30 bar enters a turbine...Ch. 6.13 - Prob. 138PCh. 6.13 - Prob. 139PCh. 6.13 - Prob. 140PCh. 6.13 - Prob. 141PCh. 6.13 - Prob. 142PCh. 6.13 - Prob. 143PCh. 6.13 - Prob. 144PCh. 6.13 - Prob. 145PCh. 6.13 - Prob. 146PCh. 6.13 - Prob. 147PCh. 6.13 - Prob. 148PCh. 6.13 - Prob. 149PCh. 6.13 - Prob. 150PCh. 6.13 - Prob. 151PCh. 6.13 - Prob. 152PCh. 6.13 - Prob. 153PCh. 6.13 - Prob. 154PCh. 6.13 - Prob. 155PCh. 6.13 - Prob. 156PCh. 6.13 - Prob. 157PCh. 6.13 - Prob. 158PCh. 6.13 - Prob. 159PCh. 6.13 - Prob. 160PCh. 6.13 - Prob. 161PCh. 6.13 - Prob. 162PCh. 6.13 - Prob. 163PCh. 6.13 - Prob. 164PCh. 6.13 - 6.165. Steam enters a two-stage turbine with...Ch. 6.13 - Prob. 166PCh. 6.13 - Prob. 167PCh. 6.13 - Prob. 168PCh. 6.13 - Prob. 169PCh. 6.13 - Prob. 170PCh. 6.13 - 6.171. Carbon dioxide (CO2) expands isothermally...Ch. 6.13 - 6.172 Steam at 12.0 MPa, 480°C expands through a...Ch. 6.13 - Prob. 173PCh. 6.13 - Prob. 174PCh. 6.13 - Prob. 175PCh. 6.13 - Prob. 176PCh. 6.13 - Prob. 177PCh. 6.13 - Prob. 178PCh. 6.13 - Prob. 179PCh. 6.13 - Prob. 180PCh. 6.13 - Prob. 181PCh. 6.13 - 6.182 An electrically driven pump operating at...Ch. 6.13 - 6.183 As shown in Fig. P6.183, water behind a dam...Ch. 6.13 - Prob. 184PCh. 6.13 - Prob. 185PCh. 6.13 - Prob. 186P
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What is entropy? - Jeff Phillips; Author: TED-Ed;https://www.youtube.com/watch?v=YM-uykVfq_E;License: Standard youtube license