UNIT - I
Introduction to Refrigeration : Necessity and applications - Unit of refrigeration and C.O.P. - Mechanical Refrigeration - Types of Ideal cycle of refrigeration.
Air Refrigeration : Bell Coleman cycle and Brayton Cycle, Open and Dense air systems - Actual air refrigeration system - Refrigeration needs of Air crafts- Air systems - Application of Air Refrigeration, Justification - Types of systems - Problems. (Chapters - 1, 2)
UNIT - II
Vapour compression refrigeration - working principle and essential components of the plant - Simple Vapour compression refrigeration cycle - COP - Representation of cycle on T-S and p-h charts - effect of sub cooling and super heating - cycle analysis - Actual cycle Influence of various parameters on system performance - Use of p-h charts - Problems. (Chapter - 3)
UNIT - III
System Components : Compressors - General classification - comparison - Advantages and Disadvantages. Condensers - classification - Working Principles. Evaporators - classification - Working Principles. Expansion devices - Types - Working Principles.
Refrigerants - Desirable properties - common refrigerants used - Nomenclature - Ozone Depletion - Global Warming - Azeotropes and Zeotropes. (Chapters - 4, 5)
UNIT - IV
Vapor Absorption System - Calculation of max COP - description and working of NH3 - water system - Li - Br system. Principle of operation Three Fluid absorption system, salient features.
Steam Jet Refrigeration System - Working Principle and Basic Components Principle and operation of (i) Thermoelectric refrigerator (ii) Vortex tube or Hilsch tube. (Chapters - 6, 7)
UNIT - V
Introduction to Air Conditioning : Psychometric Properties & Processes - Sensible and latent heat loads - Characterization - Need for Ventilation, Consideration of Infiltration - Load concepts of RSHF, ASHF, ESHF and ADP.
Concept of human comfort and effective temperature - Comfort Air conditioning - Industrial air conditioning and Requirements - Air conditioning Load Calculations. Air Conditioning systems - Classification of equipment, cooling, heating humidification and dehumidification, filters, grills and registers, deodorants, fans and blowers. Heat Pump - Heat sources - different heat pump circuits - Applications. (Chapters - 8, 9, 10)