06ME663-Refrigeration and Air ConditioningI |
PART – A |
UNIT I: |
BRIEF REVIEW OF VARIOUS METHODS OF REFRIGERATION:
Vapour compression cycle: Analysis of Vapour Compression cycle using
P-H and T-S diagrams- calculations, standard rating of operating conditions,
Actual vapour compression cycle, Second law analysis of Vapour
Compression Cycle.
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UNIT II: |
REFRIGERANTS: Types of Refrigerants, Comparative study of Ethane and
Methane derivatives, selection of Refrigerants, Requirements of Refrigerants,
Effects of lubricants in Refrigerants, substitutes of CFC Refrigerants,
Mixture Refrigerants-azeotropic mixtures
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UNIT III: |
MULTI PRESSURE VAPOUR COMPRESSION SYSTEMS: Multi stage
compression, Multi evaporator systems, Cascade systems, calculation,
production of solid carbon dioxide, System practices for multistage system.
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UNIT IV: |
EQUIPMENTS USED IN VAPOUR COMPRESSIONREFRIGERATION SYSTEM: Compressors: Principle, types of
compressors, capacity control. Condensers: Types and construction,
Expansion devices: Types- Automatic expansion valve, Thermostatic
expansion valves, capillary tube. Sizing Evaporator: Types & construction.
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PART – B |
UNIT V: |
VAPOUR ABSORPTION SYSTEM: Common refrigerant absorbent
combinations, Binary mixtures, Ammonia Water Absorption system, Actual
vapour absorption cycle and its representation on enthalpy. composition
diagram, calculations. Triple fluid vapour absorption refrigeration system.
Water-Lithium Bromide absorption chiller.
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UNIT VI: |
PSYCHOMETRY OF AIR CONDITIONING PROCESS-REVIEW: Review of Psychometric processes, Summer Air conditioning, Apparatus
Dew point, winter air conditioning.
DESIGN CONDITIONS: Outside design conditions, choice of inside
conditions, comfort chart. Choice of supply design condition.
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UNIT VII: |
LOAD CALCULATIONS AND APPLIED PSYCHOMETRICS: Internal
heat gains, system heat gains, break up of ventilation load and effective
sensible heat factor, Bypass factor, cooling load estimate. Psychometric
calculations for cooling. Selection of Air conditioning apparatus for cooling
and dehumidification, evaporative cooling.
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UNIT VIII: |
TRANSMISSION AND DISTRIBUTION OF AIR: Room Air
Distribution, Friction loss in ducts, dynamic losses in ducts, Air flow through
simple Duct system, Duct design.
CONTROLS IN REFRIGERATION AND AIR CONDITIONINGEQUIPMENTS: High pressure and low pressure cut out, thermostats, pilot
operated solenoid valve, motor controls, bypass control-Damper motor. VAV
controls.
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REFERENCE |
TEXT BOOKS: |
1. ‘Refrigeration and Air-Conditioning’ by C. P. Arora, Tata
McGraw Hill Publication, 2nd edition, 2001.
2. ‘Refrigeration and Air-Conditioning’ by W. F. Stoecker, Tata
McGraw Hill Publication, 2nd edition, 1982.
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Reference Books |
1. ‘Principles of Refrigeration’ Dossat, Pearson-2006.
2. ‘Heating, Ventilation and Air Conditioning’ by McQuistion,
Wiley Students edition, 5th edition 2000.
3. ‘Air conditioning’ by PITA, 4th edition, pearson-2005
4. ‘Refrigeration and Air-Conditioning’ by Manohar prasad
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