Other university all, Mechanical Engineering , Refrigeration and Air Conditioning Syllabus

REFRIGERATION & AIR CONDITIONING 

Credits:1

Unit-1
Refrigeration:
Introduction to refrigeration system, Methods of refrigeration, Carnot refrigeration cycle, Unit of
refrigeration, Refrigeration effect & C.O.P.
Air Refrigeration cycle:
Open and closed air refrigeration cycles, Reversed Carnot cycle, Bell Coleman or Reversed Joule air
refrigeration cycle, Aircraft refrigeration system, Classification of aircraft refrigeration system. Boot
strap refrigeration, Regenerative, Reduced ambient, Dry air rated temperature (DART).

Unit-2
Vapour Compression System:
Single stage system, Analysis of vapour compression cycle, Use of T-S and P-H charts, Effect of
change in suction and discharge pressures on C.O.P, Effect of sub cooling of condensate &
superheating of refrigerant vapour on C.O.P of the cycle, Actual vapour compression refrigeration
cycle, Multistage vapour compression system requirement, Removal of flash gas, Intercooling,
Different configuration of multistage system, Cascade system.

Unit-3
Vapour Absorption system;

Working Principal of vapour absorption refrigeration system, Comparison between absorption &
compression systems, Elementary idea of refrigerant absorbent mixtures, Temperature – concentration
diagram & Enthalpy – concentration diagram , Adiabatic mixing of two streams, Ammonia – Water
vapour absorption system, Lithium- Bromide water vapour absorption system, Comparison. Three fluid
system.

Refrigerants:
Classification of refrigerants, Nomenclature, Desirable properties of refrigerants, Common refrigerants,
Secondary refrigerants and CFC free refrigerants. Ozone layer depletion and global warming
considerations of refrigerants

Unit-4
Air Conditioning:
Introduction to air conditioning, Psychometric properties and their definitions, Psychometric chart,
Different Psychometric processes, Thermal analysis of human body, Effective temperature and comfort
chart, Cooling and heating load calculations, Selection of inside & outside design conditions, Heat
transfer through walls & roofs, Infiltration & ventilation, Internal heat gain, Sensible heat factor ( SHF
), By pass factor, Grand Sensible heat factor ( GSHF), Apparatus dew point (ADP). Air Washers,
Cooling towers & humidifying efficiency.

Unit-5
Refrigeration Equipment & Application:
Elementary knowledge of refrigeration & air conditioning equipmentse.g compressors, condensers,
evaporators & expansion devices, Food preservation, Cold storage, Refrigerates Freezers, Ice plant,
Water coolers, Elementary knowledge of transmission and distribution of air through ducts and fans,
Basic difference between comfort and industrial air conditioning.