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Chem. Eng. Thermodynamics(TKK-2137)
14/15 Semester 3
Instructor: Rama OktavianEmail: [email protected] Hr.: M.13-15, Tu. 13-15, W. 13-15, Th. 13-15, F. 09-11
Refrigeration cycle
Applications:
1. the manufacture of ice and the dehydration of gases
2. gas liquefaction
3. Air separation unit
4. Ammonia processing
Refrigeration cycle
Refrigeration ≡ transfer of heat from a cold to hot temperature region
Circulating fluid ≡ refrigerant
NET
CREF W
Q
POWER
RATECOOLINGCOP
Refrigeration cycle
Carnot refrigerator – reverse of Carnot engine
NET
CREF W
Q
POWER
RATECOOLINGCOP
Refrigeration cycle
Vapor compression cycle
1 2 A liquid evaporating at constant pressure
2 3 the actual compression process
3 4 condensation process at constant pressure
4 1 throttling process
Refrigeration cycle
Vapor compression cycle configuration