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WELCOME TO THENEW SEMESTER!
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January 2014
HEAT TRANSFER MCB 3033
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Lecturers
Dr Mohamad Zaki Abdullah (Week 1-7)Office: 18-03-18Office phone: 05 368 7212
e-mail: [email protected]
Dr Mior Azman Meor Said (Week 8-14)Office: 18-03-12
Office phone: 05 368 7159e-mail: [email protected]
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At the end of this course, students should be able to:
1. Select appropriate heat transfer equations andcorrelations to analyze steady heat conduction .
2. Apply suitable assumptions, equations andcorrelations to assess transient heat conduction .
3. Select proper assumptions and equations to solveconvection and radiation heat transfer problems.
4. Apply fundamental concepts of heat transfer todesign and evaluate heat exchanger .
Course Objectives
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Assessments
Quiz 5%Assgn 5%
Lab 10%
2 TestsTests 20%
Final Exam
Project 10%
Final GradeGrade A
Exam 50%
1 Project
6 Quizzes6 Assignments
2 Labs
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Lesson Plan
Wk Date Topics Activities/Remarks
1 13/1 17/1 Introduction: Fundamentals of Heat Transfer (Tue & Fri Holiday )
2 20/1 24/1 Steady State One-Dimensional Conduction Thermal Resistance Networks Assignment 1 /
Quiz 1
3 27/1 31/1 Thermal contact resistance & Introduction toheat transfer from Finned Surfaces Assignment 2
(Thu & Fri Holiday )
4 03/2 07/2 Steady Heat Conduction - heat transferfrom Finned Surfaces Quiz 2
5 10/2 14/2Transient Heat Conduction LumpedSystem Analysis in plane walls, cylindersand spheres
Assignment 3
6 17/2 21/2Transient Heat Conduction One-Term
Approximation in plane walls, cylinders andspheres
Quiz 3
7 24/2 28/2 Two-Dimensional Transient HeatConduction Test 1
Sorry No Mid-Semester Break
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Lesson Plan
8 03/3 07/3
Fundamentals of Convection laminar &
turbulent flowsExternal Force Convection flow acrossplates/cylinder & sphere/tube banks
Assignment 4
9 10/3 14/3 Internal Force Convection mean velocity &temperature/laminar & turbulent flow in tubes Quiz 4
10 17/3 21/3 Natural Convection over surfaces/insideenclosures/finned surfaces Assignment 5 / Quiz 5
11 24/3 28/3Fundamentals of Thermal Radiation/Radiation Heat Transfer black & greysurfaces
Assignment 6
12 31/3 04/4 Heat Exchangers LMTD/Effectiveness NTUMethodQuiz 6
(SEDEX week )
13 07/4 11/4 Selection Heat Exchangers Test 2
14 14/4 18/4 Project Presentation All students(Fri Holiday )19/4 23/4 Study Week
24/4 04/5 Examination Week
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Textbook
Yunus A. Cengel and Afshin J. Ghajar, Heat and MassTransfe r : Fund am enta l s and A ppl ica t ions , 4th Ed.,McGraw-Hill, 2011.
Strongly recommended to own the book as problemsand principles from this book are to be used extensively.
Frank P. Incropera , David P. DeWitt, Theodore L.Bergman and Adrienne S. Lavine, In t roduc t ion toHeat Trans fer , 5th Ed., John Wiley and Sons, 2007.
A.F. Mills, Heat Trans fer , 2nd Ed., Prentice Hall, 1999.
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Communication Modes
E-learning (Moodle)Enrolment key: MCB3033
e-mail Appointment
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Course Schedule
8 9 9 10 10 11 11 12 12 1 1 2 2 3 3 4 4 5
MonLEC 113-02-
06
LAB 1(20-01-04/05)
TueLAB 2
(20-01-04/05)OfficeHour
WedLEC 2
C7Office Hour
ThuLAB 3
(20-01-04/05)LEC 3
C6
FriLAB 4
(20-01-04/05)LAB 5
(20-01-04/05)
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Lab
Register yourself to:Mr. Muhamad HazriRoom 20-00-04Ext. 7076
Lab location:
Heat & Mass Transfer Lab
20-01-04/05
Lab will start in week 3.
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Policy
Attendance ( 90%) Non compliance Barred from Final Exam.PunctualityMore than 5 min late is not acceptable.
Assignment submission (On-time delivery)Non compliance NO late submission will be accepted.Use of hand phone in class (To be turned off)Non compliance Student will be asked to leave the class.
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Policy
Quizzes and Tests
No make-up quiz.
No make-up test unless with valid reasons. Written
justifications are required. You will have 5 working days
from the day of the original test to arrange for the re-test.
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What Next?
: Class rep
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Learning Outcome
Understand how thermodynamics and heattransfer are related to each other.
Understand the basics of conduction heat
transfer.
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THERMODYNAMICS AND HEAT TRANSFER
Heat: A form of energy that can be transferred from one
system to another as a result of temperature difference. Thermodynamics concerns with the amount of a system heat
transfer from one equilibrium to another.
Heat transfer deals with the rates of energy transfers and
variation of temperature. The transfer of energy (heat) is always from the higher to
lower temperature medium.
Heat transfer stops when the two mediums reach the same
temperature (equilibrium). Heat can be transferred in three different modes:
conduction , convection , radiation .
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How long it takes for thehot coffee to cool to acertain temperature?
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Application Areas of Heat Transfer
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Modeling in Engineering
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Introduction
Energy can be transferred by two mechanisms:heat ( Q) and work ( W ).
Energy interaction by heat is caused by
temperature difference . Otherwise its work.
The transfer of thermal energy or heat is referredto heat transfer .
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IntroductionThe amount of heat transferred during the process is
denoted as (J).
The amount of heat transferred per unit time is called heattransfer rate , (J/s or W).
When is constant, the rate of heat transfer per unit areanormal to the direction of heat transfer is called heat flux ,
(W/m 2).
Power: The work done per unit time.
Q
Q
A
Q
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Heat Transfer Modes
Heat can be transferred in three different modes:Conduction , Convection and Radiation .
Heat transfer through solids or stationary fluids ispurely by conduction .
In solids , heat transfer by conduction is due tovibrations of molecules and flow of free electrons.
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Heat Transfer Modes
In gases and liquids , conduction is due to collisions and diffusion of molecules during their randommotions.
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Heat Conduction
Heat transfer by conduction can be classified as:
Steady state : The temperature relatively constant
with time.
Transient state : The temperature is still changingwith time.
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0
20
40
60
80
100
120
0 1 2 3 4 5 6 7 8 9 10 11
T e m p
( C )
Time (min)
Heat Conduction
Example: Heating and boiling process of water.
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0
20
40
60
80
100
120
0 1 2 3 4 5 6 7 8 9 10 11
T e m p
( C )
Time (min)
Transient state
Steady state
Heat Conduction
Example: Heating and boiling process of water.