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Heat Exchangers

* Exchange students do not have to consider this information when selecting suitable courses for an exchange stay.

Course Unit Code635-3036/01
Number of ECTS Credits Allocated6 ECTS credits
Type of Course Unit *Compulsory
Level of Course Unit *Second Cycle
Year of Study *First Year
Semester when the Course Unit is deliveredSummer Semester
Mode of DeliveryFace-to-face
Language of InstructionCzech
Prerequisites and Co-Requisites Course succeeds to compulsory courses of previous semester
Name of Lecturer(s)Personal IDName
PR150prof. Ing. Miroslav Příhoda, CSc.
VEL37doc. Ing. Marek Velička, Ph.D.
Summary
Meaning of heat exchangers. Recuperators: the temperature of the medium along the heat exchange surface, the mean temperature gradient, the overall heat transfer coefficient, the heat output, the temperature of the heat exchange surface, the thermal efficiency of the parallel-flow and the counter-flow, the hydraulic calculation. Metal, ceramic, plastic and plate recuperators. Heat pipes. Regenerators.
Learning Outcomes of the Course Unit
Student will be able:
- to categorize heat exchangers
- to solve power and hydraulic losses or recuperators and regenerators
- to illustrate ways of usage of thermal efficiency in determination of heat transfer surface of recuperator
- to determine conditions of application of recuperative and regenerative heat exchangers
- to design the basic parameters of the heat exchanger for specific operating conditions
Course Contents
• Classification of heat exchangers. The importance of heat exchangers, energy saving, fuel savings, the degree of recuperation, increasing combustion temperature, increase performance aggregate.
• Thermal calculation of recuperator. The differential equation for the relationship between medium temperature and the size heat transfer surface. Solving equations for various cases boundary conditions.
• Dependence of temperature difference between the hot and cold streams on the size of the heat transfer surface. Calculation of the mean temperature difference.
• Overall heat transfer coefficient for the ceramic and metal recuperators. Influence of heat transfer coefficients on the overall heat transfer coefficient
• Heat rate of recuperator. Temperature heat transfer surfaces in the consideration or neglecting the thermal resistance of heat transfer surfaces, a criteria expression.
• The definition of heat exchanger effectiveness. Determination of heat exchanger effectiveness for the parallel-flow and counter-flow for different ratios between total heat capacities.
• Hydraulic calculation. Pressure loss by friction, local, geometric. Pressure losses resulting from non-isothermal flow mediums.
• Types of recuperators. Operating conditions.
• Plastic recuperators: material, overall heat transfer coefficient, pressure loss, advantages, failings.
• Plate recuperators: types, overall heat transfer coefficient, advantages, failings.
• Heat pipes: the working fluid, process temperature and radial heat flow.
• Regenerators: Thermal calculation. The amount of heat transmitted. The coefficient of heat transfer. Hydraulic calculation. Pressure losses. Types of regenerators.
Recommended or Required Reading
Required Reading:
[1] KUPPAN, T. Heat Exchanger Design Handbook. New York: Marcel Dekker, 2000. ISBN 0-8247-9787-6.
[2] WANG, L. SUNDÉN, B., MANGLIK, R. M. Plate Heat Exchangers: Design, Applications and Performance. Southampton: WIT Press, 2007. ISBN 185312737X.
[3] HEWITT, G. F. Heat Exchanger Design Handbook 2008. New York: Begell House, 2009. ISBN 1567002595.
[4] BEJAN, A., KRAUS, A. D. Heat Transfer Handbook. John Wiley & Sons, 2003. ISBN 978-0-471-39015-2.
[1] PŘÍHODA, M., HAŠEK, P. Hutnické pece. 2. vyd. Ostrava: VŠB, 1987.
[2] LIENHARD IV, J. H., LIENHARD V, J. H. A Heat Transfer Textbook. 4th ed. Cambridge: Phlogiston Press, 2012. http://web.mit.edu/lienhard/www/ahtt.html (Chapter 3).
[3] PŘÍHODA, M. Výměníky tepla. Ostrava: VŠB-TUO, 2013. e-learningová skripta.
[4] PŘÍHODA, M., RÉDR, M. Sdílení tepla a proudění. 2. vyd. Ostrava: VŠB-TU Ostrava, 2008. ISBN 978-80-248-1748-4.
Recommended Reading:
[1] WATKINS, D. E. Heating services in buildings: design, installation, commissioning & maintenance. Chichester: Wiley-Blackwell, 2011. ISBN 978-0-4706-5603-7.
[2] MacKAY, D. J. C. Sustainable Energy - without the hot air. Cambridge: UIT, 2008.
[3] HENS, H. Building physics: heat, air and moisture: fundamentals and engineering methods with examples and exercises. 2nd ed. Berlin: Ernst & Sohn, 2012. ISBN 978-3-433-03027-1.
[1] BÁLEK, S. Tepelně technické tabulky a diagramy. 2. vyd. Ostrava: VŠB-TU Ostrava, 2005. ISBN 80-248-0828-5.
[2] PŘÍHODA, M. Heat Exchangers. Ostrava: VŠB-TUO, 2014. e-learningová skripta.
[3] BAŠTA, J. et al. Topenářská příručka: 120 let topenářství v Čechách a na Moravě. Svazek 1. 1. vyd. Praha: GAS, 2001. ISBN 80-86176-82-7.
Planned learning activities and teaching methods
Lectures, Tutorials
Assesment methods and criteria
Task TitleTask TypeMaximum Number of Points
(Act. for Subtasks)
Minimum Number of Points for Task Passing
Credit and ExaminationCredit and Examination100 (100)51
        CreditCredit25 15
        ExaminationExamination75 36