BM2027 REFRIGERATION AND AIR CONDITIONING Lecture Notes for BME - Seventh (7th) semester -by R.Anirudhan

BM2027 REFRIGERATION AND AIR CONDITIONING Lecture Notes for BME - Seventh (7th) semester


BM2027 Lecture Notes

Syllabus :

UNIT I REFRIGERATION CYCLES & REFRIGERANTS 
Vapour Compression Refrigeration Cycle-Simple saturated vapour compression
Refrigeration cycle.Thermodynamic analysis of the above. Refrigerant Classification,
Designation, Alternate Refrigerants, Global Warming Potential & Ozone Depleting
Potential aspects.

UNIT II SYSTEM COMPONENTS 
Refrigerant Compressors - Reciprocating Open & Hermetic type, Screw Compressors and
Scroll Compressors -Construction and Operation characteristics. Evaporators - DX coil,
Flooded type Chillers Expansion devices -Automatic Expansion Valves, Capillary Tuber &
Thermostatic Expansion Valves. Condensing Units and Cooling Towers.

UNIT III CYCLING CONTROLS AND SYSTEM BALANCING 
Pressure and Temperature controls. Range and Differential settings. Selection and
balancing of system components - Graphical method.

UNIT IV PSYCHROMETRY 
Moist air behaviour, Psychrometric chart, Different Psychrometric process analysis.

UNIT V AIR CONDITIONING 
Summer and Winter Airconditioning, Cooling Load Calculations, Air Distribution Patterns,
Dynamic and Frictional Losses in Air Ducts, Equal Friction Method, Fan Characteristics in
Duct Systems.


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