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Course Detail

Course Name HVAC Systems & Applications
Course Code 19MEE353
Program B. Tech. in Mechanical Engineering
Year Taught 2019


Unit 1

History of refrigeration, Refrigeration cycles: vapour Compression Cycle and vapour absorption systems. Thermodynamic analysis of cycles.System components: Refrigerant Compressors-Reciprocating, Hermetic, Rotary, Centrifugal Scroll Compressors -Comparison, Construction and Operation characteristics. Evaporators – DX coil, flooded type Chillers, Condensing Units and Cooling Towers.

Unit 2

Refrigerants: Desirable properties, Classification, Designation, Alternate Refrigerants, Global Warming Potential & Ozone Depleting Potential aspects Expansion devices: Automatic Expansion Valves, Capillary Tube & Thermostatic Expansion Valves. Cycling controls and system balancing: Pressure and Temperature controls, Range and Differential settings. Selection and balancing of system components – Graphical method.

Unit 3

Psychrometry: Moist air behaviour – Psychrometric chart – Different Psychrometric process and their analysis. Air conditioning: Summer and Winter Air conditioning – Cooling Load Calculations – Air Distribution Patterns – Dynamic and Frictional Losses in Air Ducts – Equal Friction Method – Fan Characteristics in Duct Systems.

Objectives and Outcomes

Course Objectives

  • To introduce basic concepts in refrigeration and air-conditioning
  • To impart knowledge on refrigerants for domestic and industrial applications
  • To familiarize cooling/ heating load calculations for a given application

Course Outcomes

  • CO1: Identify the suitability of refrigeration systems
  • CO2: Select refrigerants and components like evaporator, compressor, condenser, expansion devices etc. based on operational characteristics
  • CO3: Design of refrigeration and air-conditioning systems using fundamentals of heat and mass transfer principles
  • CO4: Evaluate the performance of an air-conditioning system
  • CO5: Estimate cooling / heating load for given application

CO – PO Mapping

CO1 3 3 1 3
CO2 3 3 1 3 3
CO3 3 3 3 2 1 1 1 1 1 1 3 1
CO4 3 3 3 3 3 1 1 1 1 1 1 3 3 1

Textbook / References


  • Ramesh Chandra Arora. “Refrigeration and Air Conditioning”, Prentice Hall India, 2015.


  • Stocker W. F. and Jones J. W. ‘Refrigeration & Air Conditioning’ – McGraw Hill, 1985.
  • Dossat R. J. “Principles of Refrigeration”, John Wiley, 1989.
  • Goshnay W. B. “Principles and Refrigeration”, Cambridge University Press,1982.

Evaluation Pattern

Assessment Internal External
Periodical 1 15
Periodical 2 15
*Continuous Assessment (CA) 20
End Semester 50
*CA – Can be Quizzes, Assignment, Projects, and Reports.

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