Unit 1

Refrigeration cycles: Vapour Compression Cycle – Simple saturated vapour compression cycle. Thermodynamic analysis of cycles. Refrigerant Classification – Designation – Alternate Refrigerants. Global Warming Potential & Ozone Depleting Potential aspects, vapour absorption systems.

System components: Refrigerant Compressors – Reciprocating, Open type & Hermetic type, Screw Compressors and Scroll Compressors – Construction and Operation characteristics. Evaporators – DX coil, Flooded type Chillers.

Unit 2

Expansion devices – Automatic Expansion Valves, Capillary Tuber & Thermostatic Expansion Valves. Condensing Units and Cooling Towers. Cycling controls and system balancing: Pressure and Temperature controls. Range and Differential settings.

Selection and balancing of system components – Graphical method.

Psychrometry: Moist air behaviour – Psychrometric chart – Different Psychrometric process analysis.

Unit 3

• Dossat R. J. – ‘Principles of Refrigeration’ – John Wiley – 1989
• Goshnay W. B. – ‘Principles and Refrigeration’ – Cambridge University Press – 1982
• Prasad M. – ‘Refrigeration and Air Conditioning’ – Wiley Eastern -1995