Compact Heat Exchangers
FSI-IKVAcad. year: 2017/2018
The course is concerned with the following topics: Classification of heat exchangers (HE). Basic relationships for heat transfer in HE. Efficiency of finned surfaces. Methods of heat transfer enhancement. Methods of HE calculations - LMTD and epsilon-NTU methods.
Pumping power and pressure drop in HE. Correlations for heat transfer in single-phase HE. Fouling and corrosion.
Learning outcomes of the course unit
Types of heat exchanges. Principles and method of their design. Practical knowledge on how to calculate and design heat exchanger.
Fundamentals of fluid mechanics (laminar and turbulent flow) in channels and tube bundles and fundamental mechanisms of heat transfer (conduction, convection, radiation).
Recommended optional programme components
Recommended or required reading
KAKAÇ, Sadik. Heat exchangers: selection, rating, and thermal design. 2nd ed. Boca Raton: CRC Press, 2002, 501 s. ISBN 08-493-0902-6. (EN)
KAYS, W. M. a A. L. LONDON. Compact heat exchangers. Repr. ed. 1998 with corrections. Malabar, Fla.: Krieger Pub. Co., 1998. ISBN 978-1575240602. (EN)
VDI heat atlas. 2nd ed. New York: Springer, 2010. ISBN 978-3-540-77876-9. (EN)
Planned learning activities and teaching methods
The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.
Assesment methods and criteria linked to learning outcomes
The condition of course-unit credit: credit test.
The exam: combined - written and oral.
Written part: computational solving of 2 problems, with assessment 0-10 points.
Oral Part: 1 theoretical question, with assessment 0-5 points.
Final assessment: „A“ - min. 22 pts.
„B“ - min. 19 pts.
„C“ - min. 16 pts.
„D“ - min. 13 pts.
„E“ - min. 10 pts.
Language of instruction
The course objective is to provide students with information on principles of design, and operation of heat exchanges of different types and make.
Specification of controlled education, way of implementation and compensation for absences
Participation in classes is required and checked by the teacher.
Absence can be compensated for via additional computational tasks.
Type of course unit
26 hours, optionally
Teacher / Lecturer
1. Heat exchangers (HE) - function, principles of operation, classification.
2. Construction of HE.
3. Heat balance of HE. Thermal resistance and overall HTC.
5. Epsilon-NTU method.
6. Reynolds and Chilton-Colburn analogies.
7. Design of compact HE.
8. Pumping work and power.
9. Pressure drop in HE.
10. Computational relationships for heat transfer and pressure drop in HE.
11. Fuel-gas HE.
12. Two-phase HE.
13. Operational problems. Fouling and corrosion.
13 hours, compulsory
Teacher / Lecturer
1-2. Calculation of heat balance of heat exchanger (HE) - LMTD method.
3-4. Calculation of heat balance of HE - epsilon-NTU method.
5-6. Calculation of compact HE.
7-8. Calculation of pressure drop in HE.
9-11. Calculation of special cases.
12-13. Course-unit credit test.