UNIT 1:
Principles and methods of refrigeration, freezing; mixture cooling by gasreversible expansion, throttling, evaporation, Joule Thomson effect and reverse Carnot cycle;unit of refrigeration, coefficient of performance, vortex tube & thermoelectric refrigeration,adiabatic demagnetization; air refrigeration cycles-Joule’s cycle Boot-strap cycle, reducedambient cycle and regenerative cooling cycles

UNIT 2:
Vapor compression cycle, p-h and t-s diagrams,deviations from theoretical cycle, sub-cooling and super heating, effects of condenser andevaporator pressure on cop; multi-pressure system: removal of flash gas, multiple expansion &compression with flash inter cooling; low temperature refrigeration: production of lowtemperatures, cascade system, dry ice, production of dry ice, air liquefaction system,.

UNIT 3:
Theoretical and practical systems such as aquaammonia,electrolux & other systems; (b) Steam jet refrigeration: Principles and working,simple cycle of operation, description and working of simple system, (c) refrigerants:nomenclature & classification, desirable properties, common refrigeration, comparative study,leak detection methods, environment friendly refrigerants and refrigerant mixtures, brine and itsproperties

UNIT 4:
Calculation of psychometric properties of air by table and charts;psychometric processes: sensible heating and cooling, evaporative cooling, cooling anddehumidification, heating and humidification, mixing of air stream, sensible heat factor; principleof air conditioning, requirements of comfort air conditioning, ventilation standards, infiltrated airload, fresh air load human comfort, effective temperature & chart, heat production & regulationof human body,

UNIT 5:
calculation of summer & winter air conditioning load, bypassfactor of coil, calculation of supply air rate & its condition, room sensible heat factor, grandsensible heat factor, effective sensible heat factor, dehumidified air quantity. Problems oncooling load calculation. Air distribution and ventilation systems