Cooling (Refrigeration)

Holders: Prof. Kitanovski Andrej

Subject description

Prerequisites:

The requirements and conditions are adopted from the Rules on testing and grading the knowledge of students at UL FS.The students are specifically advised to participate at the lectures in the maximum extent possible, with at least 80 % presence at the auditorium exercises and 100 % presence at the laboratory exercises (any authorised absence is substituted by additional obligations in scope of the laboratory exercises).

The conditions for admission to exam are satisfied by the executed obligations according to the exam rules, presented at the beginning of the lectures.

Subject prerequisites: Thermodynamics, Heat Transfer

Content (Syllabus outline):

  • Introduction, historical overview, basic definitions
  • Refrigeration thermodynamics, processes, cycles and systems
  • Operating conditions and energy efficency
  • Refrigerants and environment
  • Refrigeration technologies and system components
  • Vapor compression refrigeration
  • Sorption refrigeration (absorption, adsorption)
  • Gas refrigeration systems (Stirling, Thermoacoustic, Vortex tube, Pulse tube, Brayton, Joule-Thomson, Other gas systems)
  • Solid state refrigeration (thermoelectric, thermionic, caloric, others)
  • Steam-jet and ejector refrigeration
  • Other and alternative refrigeration
  • Refrigeration and applications
  • Food refrigeration and freezing
  • Industrial refrigeration
  • Supermarket refrigeration
  • Refrigeration in transport
  • Electronics
  • Low temperature
  • Military and space applications
  • Medicine and other special applications
  • Heat pumps
  • Fundamentals of design for refrigeration systems
  • Two-, three-stage and cascade refrigeration processes
  • Sorption refrigeration
  • Heat pumps

Objectives and competences:

The course goal is to provide the students with knowledge in the field of refrigeration at temperatures below the temperature of surroundings, using open and closed refrigeration processes.

The knowledge in the field of refrigeration provides the student mastering the methods for lowering the temperature for

  • Food refrigeration and freezing
  • Cooling in buildings
  • Industrial refrigeration
  • Supermarket refrigeration
  • Refrigeration in transport
  • Electronics
  • Low temperatures
  • Special applications
  • the fundamental knowledge for the realization of refrigeration processes in different types of refrigerationdevices and systems,
  • the abilities necessary to reduce the energy consumption in the refrigeration processes,
  • the abilities necessary to reduce the environmental impact of cooling.

Intended learning outcomes:

Knowledge and understanding

Successfully accomplished study obligations in this course enable the student an understanding of different refrigeration processes. With the obtained knowledge the students are able to participate in different basic, applied and pre-development activities in the field of the refrigeration and refrigeration applications. Moreover they will be capable to participate at different levels of the industrial research and industrial problems. Furthermore, the students will gain the skills and knowledge for the team work, including the expertize in solving complex and interdisciplinary problems.

Use of knowledge

The obtained knowledge will be beneficial to students in understanding the subject matter and in executing the study obligations in scope of other professional courses. Furthermore, they will be able to successfully prepare the seminar papers and the diploma theses, related to all the refrigeration technologies that are part of the subject courses. Above all, the students will benefit from the obtained knowledge in their future work in research and development activities in the scope of the doctoral studies and in the industrial environmen. where the obtained knowledge can be used to significantly reduce the energy consumption or harmful refrigerant emissions, or can serve in development of new refrigeration products with high added value or even for extreme environments. 

Reflection

Knowledge in the field of refrigeration is transferrable and supplementable with the other disciplines of energetics and energy use/supply, electronics and informatics, mechatronics, process engineering, different industrial processes, vehicle transport, as well as the building engineering.

Transferrable skills – related to more than one course

A systematic approach to the treatment of subject matter on refrigeration:

  • the description of the object in question with a technical drawing
  • asking clear and concrete questions that must be answered during the treatment
  • selecting the basic physical laws
  • developing the model incorporating the target quantities
  • a mathematical solution (at least indicated)
  • checking and commenting the results

All this is characteristic to the intellectual development of students, leading to a successful research and applied work.

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