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Instructors: Dr. Gerhard Herres; Prof. Dr. Jadran Vrabec
Event type:
Lecture
Org-unit: Maschinenbau
Displayed in timetable as:
KuW-Technik
Hours per week:
2
Language of instruction:
German
Min. | Max. participants:
- | -
Requirements and recommendations:
Thermodynamics 1 and 2,
heat and mass transfer
Aim of the event:
Students will learn different methods of cold production for which various compression methods and types of compressors are important as well as various heat and mass transfer apparatus. The use of different refrigerants or processes is discussed with respect to environmentl concerns.
Target group:
Students of mechanical and chemical engineering and plastics technology further manufacturing engineering and product development.
Contents:
1 Freezing mixtures and cooling by evaporation
- Types of Freezing mixtures, range of temperature, application
- Humid air: change of state in cooling tower und air conditioning
2 Compression-refrigerator and -heat pump
- Comparison process in different diagrams, discussion of realistic cycles
- Work media, discussion of Ozone depletion problem, green house effect
- Exergy calculation for these machines
- Types and characteristic of multi stage machines
3 Absorption-refrigerator and -heat pump
- Fundamental concepts from the thermodynamics of solutions
- Comparison process in the lg p, 1/T-diagram and in the h,x-diagram
- Work media pairs (requirements, properties)
- Construction with pressure compensating gas: principle, techn. design
- Two-stage plants: Types and properties
4 Cryogenics
- Stirling process
- He3/He4-dilution-process
- refrigerating capacity by demagnetization for lowest temperatures
Contact person:
Dr. Gerhard Herres
Literature:
Lecture script;
Cube et al.: Lehrbuch der Kältetechnik, C.F. Müller, 1997;
Jungnickel et al.: Grundlagen der Kältetechnik, Verl. Techn., 1990;
DKV-Berichte, IIF-Tagungen
Supplementary events:
Turbo and Piston Machines
Caloric Apparatus
Energy efficient Heat Transfer Methods
Efficient Utilisation of Energy
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