Mechanical & Energy Engineering Techniques Dept. Erbil ... 2.pdf · Note: Answer all questions....

Ministry of Higher Education and Scientific research

Directorate of Quality Assurance and Accreditation خشینبهتی دڵنیایی جۆری و متمانهرایهبهڕێوهبه

Mechanical & Energy Engineering Techniques Dept.

Erbil Technical Engineering College

Erbil Polytechnic University

Subject: Heat Transfer

Course Book: Third year

Lecturer's name: Assist. Prof. Dr. Ahmed M. Adham

Ms. Reenas Oraha Canoon

Academic Year: 2019/2020



Course Book

1. Course name Heat Transfer

2. Lecturer in charge Assist. Prof. Dr. Ahmed Mohammed Adham

3. Department/ College

Mechanical & Energy Engineering Techniques

4. Contact e-mail: [email protected] or [email protected] Tel: +9647500271523; +9647701919195

5. Time (in hours) per week

Theory: 2 Practical: 2

6. Office hours One hour

7. Course code ME 307

8. Teacher's academic profile

Ph.D. in Mechanical Engineering, Thermo-Fluids, Universiti Teknologi Malaysia, Malaysia, 2013. Currently, he is the head of the scientific affairs department in Erbil Technical Engineering College. Subject courses (Advanced Heat Transfer, Heat Transfer, Numerical and Engineering Analysis, Refrigeration and Air conditioning and Multi-Objective Genetic Algorithm. Computer Software Programs (Microsoft office (word , Excel , Access , Power point), AutoCAD, MATLAB, SPSS)

9. Keywords Conduction, Convection, Radiation and heat Exchanger.

10. Course overview: The science of thermodynamics deals with the amount of heat transfer as a system undergoes a process from one equilibrium state to another, and makes no reference to how long the process will take. But in engineering, we are often interested in the rate of heat transfer, which is the topic of the science of heat transfer. In this course, the conduction, convection and radiation heat transfer mechanisms will be explored with a practical approach. Many real life examples will be given to show the students the importance of this course and how helpful it can be for them in their practical life after graduation.

11. Course objective: To study: (1) the concept of conduction heat transfer. (2) steady state heat conduction through wall. (3) fins analysis. (4) critical insulation measurement. (5) the concept of convection heat transfer. (6) Empirical correlation of convection heat transfer. (7) Heat exchangers. (8) the concept of radiation heat transfer.

12. Student's obligation Student's obligation in the heat transfer course is:

Attendance in the all theoretical and experimental lectures.

One or more quizzes in each course.

Examination at the end of first and second courses.

mailto:[email protected]

mailto:[email protected]



13. Forms of teaching Using data show projector, white board and PowerPoint, Testing in department’s Laboratory.

Publish all lecture notes in college website.

14. Assessment scheme Breakdown of overall assessment and examination

Theoretical examination for course 25 Activity of the year 5 Practical examination for course 10 Reports 10 Theoretical examination for Final examination 40 Practical examination for Final examination 10

15. Student learning outcome: The course will give the fundamental knowledge and practical abilities in the following:

Calculation of conduction heat transfer through different media. Convection heat transfer correlations and their use in design applications. Extended surfaces (Fins) analysis. Heat exchanger design methods. Fundamental basics of Radiation heat transfer.

16. Course Reading List and References: 1. Heat Transfer by: J. P. Holman 2. A Heat Transfer Textbook by: J. H. Lienhard VI and J. H. Lienhard V. 3. Heat and Mass Transfer by: Hans Dieter Baehr and Karl Stephan 4. Heat and Mass Transfer Data Book by: C. P. Kothandaraman and S. Subramanyan.

17. The Topics: Theory

Weeks No. Syllabuss

1-2 3 4 5

6-7 8

9-10 11-12-13

14-1516-17-18 19-20-21-22-23 24-25-26-27-28

Conduction heat transfer. Composite wall conduction. Fins analysis. Critical insulation measurement. Shape factor. Numerical method for conduction heat transfer. Convection heat transfer. Empirical forced convection correlations Natural convection Heat exchangers Radiation heat transfer



29-30 Radiation shields

18. Practical Topics

1 2 3 4 5

Conduction heat transfer Convection heat transfer Empirical forced and natural convection Heat exchangers Radiation heat transfer

19. Examinations: Theoretical:

Note: Answer all questions. Lecture notes, Data book and J. P Holman text book are allowed.

Q(1)(25Marks): A pipe carrying steam at 230°C has an internal diameter of 12 cm and the pipe thickness is

7.5 mm. The conductivity of the pipe material is 49 W/mK the convective heat transfer

coefficient on the inside is 85 W/m2K. The pipe is insulated by two layers of insulation

one of 5 cm thickness of conductivity 0.15 W/mK and over it another 5 cm thickness of

conductivity 0.48 W/mK. The outside is exposed to air at 35°C with a convection

coefficient of 18 W/m2K. Determine the heat loss for 5 m length. Determine the

temperature at the first contact with the pipe.

Q(2)(25Marks): The temperature distribution and boundary condition in part of a solid is shown in the

below figure. Determine the Temperatures at nodes marked A, B and C. Determine the

heat convected over surface exposed to convection. k = 1.5 W/m.K.



Q(3)(25 Marks): 20 mm OD copper tubes are arranged in line at 30 mm pitch perpendicular to flow and

25 mm pitch along the flow. The entry velocity of air is 1 m/s, and the air

temperature is 20°C. The tube wall is at 40°C. Determine the value of convection

coefficient if the number of tubes along the flow is 6 (or Bank is 6 rows deep).

Q(4)(25 Marks): Determine the area required for a shell and tube heat exchanger with two tube passes

to cool oil at rate of 10 kg/s from 60°C to 30°C flowing in the shell using water at 20°C

passing through the tubes and heated up to 26°C. The specific heat of the oil is 2200

J/kg K. The value of overall heat transfer coefficient is 300 W/m2 K.

Practical:

Experiment (A)

Title: Heat flow is directly proportional to temperature difference and inversely to the

distance of the flow.

A. For the below data, prove that the heat flow is directly proportional to temperature

difference and inversely to the distance of the flow. Volume = 150 ml for all

cases.

Δx1=25 mm

Δx2=30 mm

Δx3=90 mm

D = 40 mm



No. I(A) V (V) T1 T2 T4 T5 t1 t2 Volume (ml) Time (s)

1 0.45 60 32 32 29 28 26.5 28 100 13.4

2 0.6 88 35 34 30 28.5 26.5 29 100 40.4

3 0.7 100 42 39.5 31 29.5 27 30 100 41.82

4 0.85 120 52 45 32 30 28 31 100 42.5

Experiment (B)

Title: Forced convection: Finding the relation between Re and Nu.

B. For the below data, prove that the Reynolds number is proportional to Nusselt

number.

L= 140 mm

T∞=16oC

D = 13 mm Parameters Case 1 Case 2 Case 3

I(Amp) 1.21 1.73 2.09

V(volt) 9.55 13.08 15.82

ΔT 27 27 27

Disp ΔPmmH2O ΔPmmH2O ΔPmmH2O

0 125 165 260

5 131 210 305

10 134 211 310

15 135 215 312

20 137 220 314

25 137 221 303

30 120 165 195



20. Extra notes:

21. Peer review I hereby confirm that the syllabus given in the attached course book is sufficient

and covers the required areas needed by the students.

Dr. Banipal Nanno Yaqob

Lecturer

7/1/2020

Mechanical & Energy Engineering Techniques Dept. Erbil ... 2.pdf · Note: Answer all questions....

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