REFRIGERATION AND AIR CONDITIONING (BME613B)

REFRIGERATION AND AIR CONDITIONING

Course Code BME613B
CIE Marks 50
Teaching Hours/Week (L: T:P: S) 3:0:0:0 
SEE Marks 50
Total Hours of Pedagogy 4 
Total Marks 100
Credits 03 
Exam Hours 03
Examination type (SEE) Theory

Module­ 1

Introduction to Refrigeration –Basic Definitions, ASHRAE Nomenclature, Air Refrigeration Cycle-s­reversed Carnot cycle, Bell­-Coleman cycle analysis, Air Refrigeration systems-­merits and demerits and applications; Aircraft refrigeration cycles, Joule Thompson coefficient and Inversion Temperature, Linde, Claude and Stirling cycles for liquefaction of air.

Industrial Refrigeration­Chemical and process industries, Dairy plants, Petroleum refineries, Food processing and food chain, Miscellaneous

Module­ 2

Vapour Compression Refrigeration System(VCRS): Comparison of Vapour Compression Cycle and Gas cycle, Vapour Compression Refrigeration system Working and analysis, Limitations, Superheat horn and throttling loss for various refrigerants, efficiency, Modifications to standard cycle – liquid suction heat exchangers, Grindlay cycle and Lorenz cycle, Optimum suction condition for optimum COP – Ewing’s construction and Gosney’s method. Actual cycles with pressure drops, Complete Vapour Compression Refrigeration System, Multi­Pressure, Ultievaporator systems or Compound Vapour Compression Refrigeration Systems – Methods like Flash Gas removal, Flash inter cooling and water Inter cooling.

Module ­3

Vapour Absorption Refrigeration Systems: Absorbent – Refrigerant combinations, WaterAmmonia Systems, Practical problems, Lithium­ Bromide System, Contrast between the two systems, Modified Version of Aqua­Ammonia System with Rectifier and Analyzer Assembly. Practical problems – crystallization and air leakage, Commercial systems.

Other types of Refrigeration systems: Brief Discussion on (i) Steam­Jet refrigeration system and          (ii) Thermoelectric refrigeration, pulse tube refrigeration, thermoacoustic refrigeration systems

Module ­4

Refrigerants: Primary and secondary refrigerants, Designation of Refrigerants, Desirable properties of refrigerants including solubility in water and lubricating oil, material compatibility, toxicity, flammability, leak detection, cost, environment and performance issues Thermodynamic properties of refrigerants, Synthetic and natural refrigerants, Comparison between different refrigerants vis a vis applications, Special issues and practical implications Refrigerant mixtures – zeotropic and azeotropic mixtures.

Refrigeration systems Equipment: Compressors, Condensers, Expansion Devices and Evaporators, A brief look at other components of the system.

Module ­5

Air-­Conditioning: Introduction to Air­-Conditioning, Basic Definition, Classification, power rating, Mathematical Analysis of Air­-Conditioning Loads, Related Aspects, Different Air-Conditioning Systems­Central – Station Air-­Conditioning System, Unitary Air-­Conditioning System, Window Air­Conditioner and Packaged Air-­Conditioner, Components related to Air-Conditioning Systems.

Transport air conditioning Systems: Air conditioning systems for automobiles (cars, buses etc.), Air conditioning systems for trains, Air conditioning systems for ships

Suggested Learning Resources:

Text Books

1. Roy J. Dossat, Principles of Refrigeration, Wiley Limited

2. Arora C.P., Refrigeration and Air­conditioning, Tata Mc Graw –Hill, New Delhi, 2ndEdition, 2001.

3. Stoecker W.F., and Jones J.W., Refrigeration and Air­conditioning, Mc Graw ­ Hill, New Delhi 2nd edition, 1982.

Reference Books:

1. Dossat, Principles of Refrigeration Pearson­2006.

2. McQuistion, Heating, Ventilation and Air Conditioning, Wiley Students edition,5th edition, 2000.

3. Refrigeration and Air­Conditioning' by Manohar prasad

4. S C Arora& S Domkundwar, Refrigeration and Air­Conditioning Dhanpat Rai Publication