This document provides an introduction to a heat transfer course. It discusses topics that involve heat transfer such as power generation and building design. The course will cover the basic principles of conduction, convection, and radiation heat transfer, as well as heat exchangers. By the end of the course, students should understand heat transfer fundamentals and be able to analyze thermal systems and solve heat transfer problems. The course will assess students through quizzes, homework, midterms, and a final exam.

1. 103306-Heat Transfer
King Mongkut’s University of Technology North Bangkok
Faculty of Engineering
Department of Mechanical Engineering

2. Relevance of Heat Transfer
Heat Transfer 103306Course Introduction
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 Electric Power Generation
 Alternate Energy Systems
 Combustion/Propulsion Systems
 Building Design
 Heating & Cooling Systems
 Domestic Appliances
 Materials/Food Processing
 Electronics Cooling & Packaging
 Cryogenics
 Environmental Processes
 Space Vehicle Systems

3. Course Description
Heat Transfer 103306Course Introduction
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 Basic Heat Transfer,
 Introduction to conduction, convection, and radiation
heat transfer;
 heat exchangers

4. Outcomes
Heat Transfer 103306Course Introduction
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By the end, the students should be able to:
 have a good understanding of heat transfer
fundamentals.
 have a theoretical and practical background in heat
transfer.
 have the ability to analyse thermal systems.
 be able to use their knowledge of heat transfer to solve
a problem.

5. Objective of this course
Heat Transfer 103306Course Introduction
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 Students will learn the fundamental principles of
heat transfer.
 Students will learn to solve ordinary and partial
differential equations.
 Students will be able to analyse a heat exchanger.
 Students will be able to work on multimode heat
transfer applications.

6. Prerequisites
Heat Transfer 103306Course Introduction
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 Thermodynamics
 Fluid Mechanics
Students who do not have the proper prerequisites
CANNOT take this course.

7. Assessment
Heat Transfer 103306Course Introduction
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 Quizzes, Homeworks 10%
 Midterm Exam 40%
 Final Exam 50%
!!! NO extra work will be given to individual students
to improve grades. !!!

8. Course materials
Heat Transfer 103306Course Introduction
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 Heat Transfer and Mass Transfer, A Practical
Approach, Yunus A. Cengel, 3rd Edition (SI Unit)

9. Heat Transfer 103306Course Introduction
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 Ch 1: Introduction and Basic Concepts
 Ch 2: Heat Conduction Equation
 Ch 3: Steady Heat Conduction
 Ch 4: Transient Heat Conduction
 Ch 6: Fundamental of Convection
 Ch 7: External Forced Convection
 Ch 8: Internal Forced Convection
 Ch 11: Heat Exchangers
 Ch 12: Fundamental of Thermal Radiation
 Ch 13: Radiation Heat Transfer
Topic

10. Heat Transfer
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 When two objects of different temperatures are
placed in thermal contact, the temperature of the
warmer decreases and the temperature of the cooler
increases
 However, this doesn't happen instantaneously, it takes
time for the transfer of energy to take place.
 Different materials transfer the heat at different
rates.

11. 3 Methods of Heat Transfer
Heat Transfer 103306Course Introduction
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 Conduction: heat transfer which occurs by atoms and molecules
bumping into each other and passing momentum and energy
through collisions.
 Convection: heat transfer which occurs due to molecules moving
about and mixing while carrying the energy along with them.
 Radiation: heat transfer which occurs due to the emission and
absorption of electromagnetic radiation between bodies.

12.  The molecules vibrate about
their equilibrium positions
 Particles near the stove coil
vibrate with larger amplitudes
 These collide with adjacent
molecules and transfer some
energy
 Eventually, the energy travels
entirely through the pan and its
handle
Heat Transfer 103306Course Introduction
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Conduction

13. Conduction, cont.
Heat Transfer 103306Course Introduction
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 In general, metals are good conductors
 They contain large numbers of electrons that are relatively
free to move through the metal
 They can transport energy from one region to another
 Conduction can occur only if there is a difference in
temperature between two parts of the conducting
medium

14. Convection
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 Energy transferred by the movement of a substance
 When the movement results from differences in density,
it is called natural convection
 When the movement is forced by a fan or a pump, it is
called forced convection

15.  Air directly above the
flame is warmed and
expands
 The density of the air
decreases, and it rises
 The mass of air warms
the hand as it moves
by
Heat Transfer 103306Course Introduction
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Convection, cont.

16. Radiation
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 Radiation does not require physical contact
 All objects radiate energy continuously in the form of
electromagnetic waves due to thermal vibrations of the
molecules
 Rate of radiation is given by Stefan’s Law

17. Objectives of a Heat Transfer
Calculation
Heat Transfer 103306Course Introduction
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 ANALYSIS
 Calculate T(x,y,z,t) or q for a system undergoing a specified
process
 e.g., calculate daily heat loss from a house
 e.g., calculate operating temperature of a semiconductor chip with
heat sink/fan
 DESIGN
 Determine a configuration and operating conditions that yield a
specified T(x,y,z,t) or q
 e.g., determine insulation needed to meet a specified daily heat loss
from a house
 e.g., determine heat sink and/or fan needed to keep operating
temperature of a semiconductor chip below a specified value