Winter Semester 2012/13
Refrigeration machinery and systems I MBM2S32004
Thermodynamic principles of refrigeration cycles. Joule cycle of gas refrigeration systems. Linde cycle of vapour refrigeration systems. Coefficient of performance (COP) of refrigeration systems.
One stage vapour compression refrigeration systems. Effect of basic operation parameters on the operation of the systems: evaporation temperature, condensation temperature, liquid subcooling, sucked vapour superheating. Application of internal heat transfer. Two-stage compression and two-stage throttling. Analysis of one and two-stage compression systems. Cascade systems.
Thermodynamic and thermokinetic properties of refrigerants and secondary working fluids and their effect on energy efficiency of refrigeration systems. Oils applied in refrigeration engineering.
Refrigeration compressors: reciprocating, screw, vane and scroll machines. The cycle of screw compressor with economiser. Design and thermal performance of refrigeration heat transfer performance: evaporators, condensers, and auxiliary heat exchangers. Evaporators feeding systems.
Principles of thermodynamics of solutions of sorption working fluids. Cycles of sorption refrigeration systems: ammonia-water and water-LiBr. Adsorption refrigeration units.
Jet ejection refrigeration systems in application to air-conditioning.
Thermoelectric refrigeration engineering. Dedicated heat transfer equipment. Electric power supply systems for thermoelectric refrigerators.
Thermodynamic principles of criotechnology. Linde, Claude and Kapitza cycles. Auxiliary equipment for gas liquification systems.
(in Polish) Rodzaj przedmiotu
(in Polish) Wymagania
(in Polish) Założenia (prorekwizyty)
Course coordinators
Learning outcomes
Student is able to:
- describe the basic processes of refrigeration cycles;
- define basic notions in the field of refrigeration engineering;
- perform the basic calculations of classic refrigeration cycles;
- knows the basic principles of design and operation of compressors and heat transfer equipment dedicated for refrigeration systems.
Assessment criteria
Lecture: written test with 5 theoretical problems and one calculation problem for two-stage refrigeration cycle. Students are proivided with the examination problems by the lecturer during the lectures.
The score for receive the credit with this course is 50%.
Project: elaboration of one topic chosen from the project topics list delivered by the lecturer; presentation of the project results in seminar.
Receving the credits for lecture and project are independent.
Practical placement
Not planned.
Bibliography
1. Gutkowski K.M., Butrymowicz D.: Chłodnictwo i klimatyzacja, WNT, Warszawa, 2007.
2. Bohdal T., Charun H., Czapp M.: Urządzenia chłodnicze sprężarkowe parowe, WNT, Warszawa, 2004.
3. Kalinowski K. i in.: Amoniakalne urządzenia chłodnicze, tom 1, MASTA, Gdańsk, 2000.
4. Bonca Z., Butrymowicz D., Targański W., Hajduk T.: Nowe czynniki chłodnicze i nośniki ciepła, MASTA, Gdańsk, 2004.