Refrigeration Systems and Heat Pumps

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Course Unit Code361-0500/04
Number of ECTS Credits Allocated4 ECTS credits
Type of Course Unit *Compulsory
Level of Course Unit *Second Cycle
Year of Study *First Year
Semester when the Course Unit is deliveredWinter Semester
Mode of DeliveryFace-to-face
Language of InstructionCzech, English
Prerequisites and Co-Requisites There are no prerequisites or co-requisites for this course unit
Name of Lecturer(s)Personal IDName
VRT20doc. Ing. Mojmír Vrtek, Ph.D.
Summary
The subject deals with refrigeration technology and heat pumps. Students will acquire advanced knowledge and skills in the field of theory and practical realization of reversed thermodynamic cycles, namely compressor and sorption refrigeration cycles, in the field of properties of working substances - refrigerants and antifreeze mixtures incl. their ecological aspects.
Further, the subject deals with the possibility of using heat pumps for utilisation of low-potential heat.
Learning Outcomes of the Course Unit
Students learn to understand the problems of Refrigeration Systems and Heat Pumps.
Students will be able to:
- Explain and define basic concepts discussed in the fields of
- Clarify the links and connections within the given fields and external relations to other areas of energy
- Describe the basic technical equipment used in those fields and explain their principles

They will receive:
- An overview of the terminology
- An overview of the basic technological processes of transfer and transform energy in relevant areas

They will be able to:
- Perform basic energy balance and capacity calculations in the areas of the issue
- Select appropriate ways and methods to achieve the desired objectives in practice
Course Contents
1. Introduction, purpose and importance of refrigeration and heat pump technology, cryogenics. Phase change materials.
2. Methods of achieving low temperatures, the basic theory of refrigeration cycles. Comparative cycles.
3. Steam flow single stage, with the internal heat exchange. Supercritical cycle.
4. Binary mixtures, evaporation, freezing. Heat transfer fluids.
5. Refrigerants - calculation bases. Characteristics of the main types of refrigerants.
6. Two and multistage refrigeration cycles, cascade conection.
7. Gas cycles.
8. Cycles for the liquefaction of gases.
9. Absorption refrigeration cycles - ammonia - water.
10. Absorption refrigeration cycles - water - lithium bromide. Adsorption cycles.
11. The basic elements of refrigeration circuits - compressors, heat exchangers, control, isolation.
12. Heat pumps - types.
13. Connection to heating systems. Proposal for bivalent point and operating mode.
14. Evaluation of the benefits heat pumps in terms of energy, economic and environmental.
Recommended or Required Reading
Required Reading:
WHITMAN, W. C; JOHNSON, W. M.; TOMCZYCK, J. A. Refrigeration and Air Conditioning Technology. 5E (5th Bk&CD edition). Thomson Delmar Learning, 2004. ISBN 1401837654.
DVOŘÁK, Z. Základy chladicí techniky. Vyd. 1. Praha : SNTL – Nakladatelství technické literatury, 1986. 247s.
alternativně
DVOŘÁK, Z. Základy chladicí techniky. Praha : ČVUT, 1982. 218 s.
PETRÁK, J., PETRÁK, M. Tepelná čerpadla. Praha : ČVUT, 2004. 245 s. ISBN 80-01-03126-8.
WHITMAN, W. C; JOHNSON, W. M.; TOMCZYCK, J. A. Refrigeration and Air Conditioning Technology. 5E (5th Bk&CD edition). Thomson Delmar Learning, 2004. ISBN 1401837654.
Recommended Reading:
DOSSAT, R. J.,HORAN, T. J. Principles of refrigeneration. 5th ed. New Jersey: Prentice Hall, 2002. ISBN 0130272701.
Next study materials:
http://fs1.vsb.cz/361/erasmus/refrig/ - non-public access
http://fs1.vsb.cz/361/vyuka/vrt/CHZaTC/ - non-public access
SRDEČNÝ, K., TRUXA, J. Tepelná čerpadla. 1. vydání. Praha : EkoWATT, 2009. 71 s. ISBN 978-80-87333-02-0.
HAVELSKÝ, V., FÜRI, B. Chladiaca technika : základy techniky chladenia a tepelných čerpadiel. 3. přeprac. vyd. Bratislava : Slovenská technická univerzita, 2006. 168 s. ISBN 80-227-2349-5.
DOSSAT, R. J.,HORAN, T. J. Principles of refrigeneration. 5th ed. New Jersey: Prentice Hall, 2002. ISBN 0130272701.
Další podpůrné studijní materiály: http://fs1.vsb.cz/361/vyuka/vrt/CHZaTC_EN/ - neveřejný přístup
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
        CreditCredit40 10
        ExaminationExamination60 11