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| MM4023 | Refrigeration | 3+0+0 | ECTS:6 | | Year / Semester | Fall Semester | | Level of Course | First Cycle | | Status | Elective | | Department | DEPARTMENT of MECHANICAL ENGINEERING | | Prerequisites and co-requisites | None | | Mode of Delivery | Face to face | | Contact Hours | 14 weeks - 3 hours of lectures per week | | Lecturer | -- | | Co-Lecturer | None | | Language of instruction | Turkish | | Professional practise ( internship ) | None | | | | The aim of the course: | | To give the students a comprehensive applications oriented treatment of the vapor compression refrigeration cycle and associated equipment besides basic principles of refrigeration and alternative refrigeration systems. |
| Learning Outcomes | CTPO | TOA | | Upon successful completion of the course, the students will be able to : | | | | LO - 1 : | appreciate the importance of refrigeration applications in modern life. | 1,3 | 1 | | LO - 2 : | have a chance to learn about various refrigeration techniques and the cycles that they work on. | 1,3 | 1 | | LO - 3 : | calculate the cooling load for a specific application. | 1,3 | 1,6 | | LO - 4 : | perform selection and rating of a refrigeration system both on components basis and the overall system basis. | 1,3 | 1,6 | | LO - 5 : | carry out the necessary studies on designing a cold storage | 1,3 | 1,6 | | CTPO : Contribution to programme outcomes, TOA :Type of assessment (1: written exam, 2: Oral exam, 3: Homework assignment, 4: Laboratory exercise/exam, 5: Seminar / presentation, 6: Term paper), LO : Learning Outcome | | |
| Basic refrigeration cycles and concepts. Thermodynamic analysis of vapor compression refrigeration systems. Components of vapor compression refrigeration systems: Compressors, evaporators, condensers, expansion devices, and auxiliary and control devices. Refrigerants. Heat transfer in refrigeration systems and cooling load calculations. Pipe sizing in refrigeration systems. Examples of cold storage systems. Alternative refrigeration systems. |
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| Course Syllabus | | Week | Subject | Related Notes / Files | | Week 1 | Basic concepts and definitions. | | | Week 2 | Vapor compression refrigeration cycles: Simple saturated cycle. | | | Week 3 | Actual single stage vapor compression refrigeration cycle, the effects of subcooling and superheating. | | | Week 4 | Complex vapor compression refrigeration cycles. | | | Week 5 | The main components of vapor compression refrigeration system: Compressors, evaporators. | | | Week 6 | Condensers, expansion devices. | | | Week 7 | Accessories and control devices. | | | Week 8 | Refrigerants: Properties of the refrigerants, secondary refrigerants.
(Assignment of the cold storage projects)Midterm exam | | | Week 9 | Midterm exam | | | Week 10 | Alternative refrigeration systems: Absorption refrigeration systems, vapor - jet systems, thermoelectric refrigeration, cold air refrigeration devices. | | | Week 11 | Cooling load calculations: Wall gain load, air change load, product load. | | | Week 12 | Miscellenious load, cooling load calculation table. | | | Week 13 | Pipe sizing in refrigeration systems: Pipe size selection criteria, an approximate method for pipe sizing. | | | Week 14 | Basics in refrigeration system design and sample applications. | | | Week 15 | Basics in refrigeration system design and sample applications (continued). (Term projects are due) | | | Week 16 | End of the term exam | | | |
| 1 | Genceli, O. F. 2001; Soğutma Tesisatı, MMO Yayın No:MMO/2001/295, Ankara. | | | |
| 1 | Özkol, N. 2004; Uygulamalı Soğutma Tekniği, MMO Yayın No: MMO/2004/115/6, Ankara. | | | 2 | 2006 ASHRAE HANDBOOK, Refrigeration, Atlanta. | | | 3 | Dossat, R. J. 1991; Principles of Refrigeration, Prentice-Hall, USA. | | | |
| Method of Assessment | | Type of assessment | Week No | Date | Duration (hours) | Weight (%) | | Mid-term exam | 9 | 25/11/2021 | 1 | 25 | | Project | 14 | 31/12/2021 | 1 | 25 | | End-of-term exam | 16 | 13/02/2022 | 2 | 50 | | |
| Student Work Load and its Distribution | | Type of work | Duration (hours pw) | No of weeks / Number of activity | Hours in total per term | | Yüz yüze eğitim | 3 | 14 | 42 | | Sınıf dışı çalışma | 1 | 14 | 14 | | Arasınav için hazırlık | 1 | 7 | 7 | | Arasınav | 1 | 2 | 2 | | Proje | 2 | 7 | 14 | | Dönem sonu sınavı için hazırlık | 1 | 9 | 9 | | Dönem sonu sınavı | 1 | 2 | 2 | | Total work load | | | 90 |
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