Thinking Like an Engineer: An Active Learning Approach (4th Edition)
4th Edition
ISBN: 9780134639673
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Chapter 19.3, Problem 15CC
Consider the following table of values. Determine the formulae to represent columns A through J. In some cases, the formulae in rows 1–10 will be similar. In other cases, the entry in the first row will be a number rather than a formula. Create a for loop to display the values; use tabs in a formatted fprintf statement to create each column.
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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.
In an industrial facility, a counter-flow double-pipe heat exchanger uses superheated steam at a temperature of 155°C to
heat feed water at 30°C. The superheated steam experiences a temperature drop of 70°C as it exits the heat exchanger.
The water to be heated flows through the heat exchanger tube of negligible thickness at a constant rate of 3.47 kg/s. The
convective heat transfer coefficient on the superheated steam and water side is 850 W/m²K and 1250 W/m²K,
respectively. To account for the fouling due to chemical impurities that might be present in the feed water, assume
a fouling factor of 0.00015 m²-K/W for the water side.
The specific heat of water is determined at an average temperature of (30 +70)°C/2 = 50°C and is taken to be
J/kg.K.
Cp=
4181
Water
Steam
What would be the required heat exchanger area in case of parallel-flow arrangement?
The required heat exchanger area in case of parallel-flow arrangement is
1m².
Chapter 19 Solutions
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
Ch. 19.1 - Create a written algorithm to multiply all integer...Ch. 19.1 - Create a graphical algorithm to multiply all...Ch. 19.1 - Prob. 3CCCh. 19.2 - Assume a vector v2 has already been defined and...Ch. 19.2 - Prob. 5CCCh. 19.2 - Write a while loop that requires the user to input...Ch. 19.2 - Write a program that asks the user to enter a...Ch. 19.2 - Prob. 8CCCh. 19.2 - Prob. 9CCCh. 19.2 - Write a section of code that will ask the user to...
Ch. 19.3 - Write a for loop to display every even number from...Ch. 19.3 - Write a for loop to display every multiple of 5...Ch. 19.3 - Write a for loop to display every odd number from...Ch. 19.3 - Assume a vector Vals has already been defined....Ch. 19.3 - Consider the following table of values. Determine...Ch. 19.3 - Write two nested for loops to determine how many...Ch. 19.3 - Assume a matrix MZ has already been defined. Write...Ch. 19.3 - Prob. 18CCCh. 19.3 - Determine the output of the following code:Ch. 19 - Prob. 1ICACh. 19 - Create a written algorithm or flowchart as...Ch. 19 - Create a written algorithm or flowchart as...Ch. 19 - Create a written algorithm or flowchart as...Ch. 19 - Create a written algorithm or flowchart as...Ch. 19 - Create a written algorithm or flowchart as...Ch. 19 - Create a written algorithm or flowchart as...Ch. 19 - For each of the following code segments, determine...Ch. 19 - a. Assume CA1 and CA2 are cell arrays that both...Ch. 19 - Fill in the table with the values of k, b, x, and...Ch. 19 - Assume that a simple menu has been created by the...Ch. 19 - Write a MATLAB program to implement the algorithm...Ch. 19 - Write a program that will ask the user to input a...Ch. 19 - Write a MATLAB program to implement the algorithm...Ch. 19 - Write a function named CountDown that accepts a...Ch. 19 - While experimenting with coding sequences, you...Ch. 19 - Answer the question with each of the following...Ch. 19 - For each of the following code segments, determine...Ch. 19 - a.Explain what the following function does,...Ch. 19 - For each of the following code segments, determine...Ch. 19 - Prob. 23ICACh. 19 - Prob. 24ICACh. 19 - Write a MATLAB program to implement the algorithm...Ch. 19 - Prob. 26ICACh. 19 - Write a function named GetArray that will accept...Ch. 19 - Assume the vector AM contains an even number of...Ch. 19 - Write a function named EvenSum that will accept a...Ch. 19 - Prob. 30ICACh. 19 - Write a function named CLASS that will accept a...Ch. 19 - You are assessing the price of various components...Ch. 19 - You are studying the number of defective parts...Ch. 19 - The pascal triangle an amazing number of uses,...Ch. 19 - Write a function named Prodstate that will accept...Ch. 19 - Design a flowchart for a program to help students...Ch. 19 - Create an algorithm to allow the user to enter a...Ch. 19 - Write a program to implement the algorithm...Ch. 19 - A zombie picks up a calculator and starts adding...Ch. 19 - Write a function called Balloon that will accept a...Ch. 19 - Prob. 7RQCh. 19 - Prob. 8RQCh. 19 - You are to program part of the interface for a...Ch. 19 - Prob. 13RQCh. 19 - A matrix names mach contains three columns of data...Ch. 19 - Prob. 15RQCh. 19 - You are programming the control system for a robot...Ch. 19 - Write a program to implement the GPA calculator...Ch. 19 - The Fibonacci sequence is an integer sequence...Ch. 19 - As early as 650 BC, mathematicians have been...Ch. 19 - Write a program to analyze the cooling of a cup of...Ch. 19 - After numerous experiments with a circuit...
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