REFRIGERATION AND AIR CONDITIONING (CCE)

SHE Level 4
SCQF Credit Points 20.00
ECTS Credit Points 10.00
Module Code MHH324734
Module Leader Martin MacDonald
School School of Computing, Engineering and Built Environment
Subject SCEBE - School Office
Trimesters
  • A (September start)
  • B (January start)

Summary of Content

The aim of this module is to extend the knowledge and understanding gained in lower levels on thermodynamics and heat transfer into refrigeration and air conditioning systems. Students will learn various refrigeration cycles and its performance evaluation techniques. Also they will learn Air Conditioning systems and Classification, cooling, heating humidification and dehumidification.

Syllabus

Introduction: Revision of Refrigerators and Heat Pump. The Carnot Cycle and Reversed Carnot Cycle, The Carnot Refrigerator. Air Refrigeration: Bell Coleman cycle and Brayton Cycle, Open and Dense air systems, Actual air refrigeration system problems. Refrigeration: Vapour compression refrigeration, working principle, COP, Representation of cycle on T-S and p-h charts, System Components: Working Principles of Compressors, Condensers, Expansion devices. Refrigerants: Desirable properties, classification. Vapor Absorption System: Description and working of NH3 - water system and Li Br -water System, team Jet Refrigeration System, Thermoelectric refrigerator, Vortex tube. Introduction to Air Conditioning: Psychometric Properties & Processes Characterization, of Sensible and latent heat loads, Load concepts of RSHF, GSHF- Problems, Concept of ESHF and ADP. Air Conditioning Requirements: Requirements of human comfort and concept of effective temperature- Comfort chart, Comfort Air-conditioning, Requirements of Industrial air conditioning, Air conditioning Load Calculations. Air Conditioning systems : Classification of equipment, cooling, heating humidification and dehumidification, filters, grills and registers fans and blowers. Heat Pump, Heat sources, different heat pump circuits. Heat Pump, Heat sources, different heat pump circuits.

Learning Outcomes

On completion of this module students should be able to:1. Analyse different refrigeration cycles and their performance.(AM1, AM4)2. Explain the functioning of refrigeration systems and their major components (AM1)3. Demonstrate the proper use of different refrigerants and their application in a refrigeration system (AM1)4. Analyse psychometric properties, processes as applied to air conditioning systems and perform cooling load calculations (AM1, AM6, AM4)5. Demonstrate the performance of refrigeration and air conditioning systems through laboratory tests (AM4)

Teaching / Learning Strategy

The lectures will be used to convey the concepts of principles covered with suitable explanatory examples. The material covered during the classroom lectures will be reinforced and consolidated through tutorials and laboratory sessions. Private study will be used to reinforce materials delivered on relevant topics. Practical work in the laboratory will be used to encourage team work, enhance understanding and application of the engineering principles and develop skills in technical report writing.

Indicative Reading

Dossat, 2001, Principles of Refrigeration ,, Pearson Education. Ananthanarayanan, Basic Refrigeration and Air Conditioning , TMH Publishing, India. P.L.Bellaney, 2005, Refrigeration and Air Conditioning ", Khanna Publication, India.

Transferrable Skills

Development of skills in problem analysis and problem-solving, numerical analysis, laboratory experiments and measurements. Writing technical reports, presenting results-written, orally and visually.

Module Structure

Activity Total Hours
Assessment (FT) 16.00
Independent Learning (FT) 100.00
Practicals (FT) 28.00
Lectures (FT) 56.00

Assessment Methods

Component Duration Weighting Threshold Description
Exam (School) 1.50 20.00 n/a Mid-term test - Unseen written examination-1½ Hours
Exam (Exams Office) 3.00 50.00 45% Final Examination - Unseen written examination-3 Hours
Coursework 1 n/a 30.00 n/a Lab exercises with report of 2000 words linked to a test