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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: zaki_abdullah@petronas.com.my

Dr Mior Azman Meor Said (Week 8-14)Office: 18-03-12

Office phone: 05 368 7159e-mail: miorazman@petronas.com.my

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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

Qq

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.