• Semester 2, position 2

Students will acquire theoretical and applied (practical) knowledge on steady state problems in heat transfer. Based upon the acquired knowledge they will be ready to recognise and solve the applied (practical) problems encountered in engineering practice, especially in the areas of process-, HVAC- and thermal power engineering. Students will acquire knowledge in steady state heat conduction, heat convection and heat transfer by boiling and condensation, heat exchanger design and radiation heat transfer.

Upon successful completion of the course, students should be able to: •Recognize the problems of stationary heat conduction in bodies with and without internal heat sources. •Recognize the problems of the stationary heat transfer. Besides, to explain and demonstrate how they are applied to flat and cylindrical wall and determination of the insulation critical diameter. •Recognize and perform thermomechanical calculation of finned surfaces. •Recognize and perform thermomechanical analysis of heat exchangers. •Interpret, explain and apply the basic laws of heat radiation in the calculation of the heat radiation between two surfaces. •Interpret, explain and apply combined problems of heat transfer.

1. Conduction heat transfer (heat conduction) – basic definitions, Fourier’s law, Fourier’s differential equation; 2. Steady state heat conduction problems: plane and cylindrical wall, bars and fins. 3. Convection heat transfer: forced and free heat convection; heat convection by boiling and condensation. 4. Numerical solution of the problem of stationary heat conduction. 5. Heat exchangers: a) mean log temperature difference method; b) heat exchanger efficiency – number of heat transfer units method (ε – NTU method). 6. Heat transfer by radiation (thermal radiation) – basic mechanisms, wave and quantum theory, basic laws; radiation between two surfaces; basics about radiation of gasses.

1. Numerical exercises: steady state conduction, bodies with interior heat sources, critical thickness of pipe insulation, bars and fins. Numerical solution of the problem of stationary heat conduction. 2. Numerical exercises: forced and free convection: determining the Nusselt number and the convection heat transfer coefficient, heat convection by boiling and condensation. 3. Numerical exercises: a) mean log temperature difference method; b) heat exchanger efficiency – number of heat transfer units method (ε-NTU method). 4. Numerical exercises: heat transfer by radiation between two surfaces. Basics about radiation of gasses. Combined heat transfer problems.

Physics and measurements

Total assigned hours: 75

New material: 20
Elaboration and examples (recapitulation): 10

Auditory exercises: 20
Laboratory exercises: 0
Calculation tasks: 0
Seminar paper: 2
Project: 0
Consultations: 0
Discussion/workshop: 8
Research study work: 0

Review and grading of calculation tasks: 0
Review and grading of lab reports: 0
Review and grading of seminar papers: 2
Review and grading of the project: 0
Test: 5
Test: 3
Final exam: 5

Activity during lectures: 0
Test/test: 60
Laboratory practice: 0
Calculation tasks: 0
Seminar paper: 5
Project: 0
Final exam: 35
Requirement for taking the exam (required number of points): 30

F.P. Incropera, D.P. deWitt: Fundamentals of Heat Transfer, John Wiley & Sons, 2011.; J.P. Holman: Heat Transfer, McGraw Hill, 2010.; Cengel, Y.: Heat Transfer A Practical Approach, McGraw - Hill, 2008.; Andrian Bejan, Convection Heat Transfer, Wiley, 2004.