JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Vapour Compression Refrigeration: Performance of Complete vapor compression system. Components of Vapor Compression System: The condensing unit – Evaporators – Expansion valve – Refrigerants – Properties – ODP & GWP - Load balancing of vapor compression Unit. Compound Compression: Flash inter-cooling – flash chamber – Multi-evaporator & Multistage systems.

UNIT - II

Production of Low Temperature: Liquefaction system; Cascade System – Applications.– Dry ice system. Vapor absorption system – Simple and modified aqua – ammonia system – Representation on Enthalpy –Concentration diagram. Lithium – Bromide system Three fluid system – HCOP.

UNIT - III

Air Refrigeration: Applications – Air Craft Refrigeration -Simple, Bootstrap, Regenerative and Reduced ambient systems – Problems based on different systems. Steam Jet refrigeration system: Representation on T-s and h-s diagrams – limitations and applications Unconventional Refrigeration system – Thermo-electric – Vortex tube & Pulse tube – working principles.

UNIT - IV

Air –Conditioning: Psychrometric properties and processes – Construction of Psychrometric chart. Requirements of Comfort Air –conditioning – Thermodynamics of human body – Effective temperature and Comfort chart – Parameters influencing the Effective Temperature. Summer, Winter, and year round air – conditioning systems. Cooling load Estimation: Occupants, equipments, infiltration, duet heat gain fan load, Fresh air load.

UNIT - V

Air –Conditioning Systems: All Fresh air, Re-circulated air with and without bypass, with reheat systems – Calculation of Bypass Factor, ADP, RSHF, ESHF and GSHF for different systems. Components: Humidification and dehumidification equipment – Systems of Air cleaning – Grills and diffusers – Fans and blowers – Measurement and control of Temperature and Humidity.

REFERENCES:

• 1. Refrigeration & Air Conditioning /C. P. Arora/TMH
• 2. Refrigeration & Air Conditioning /Arora & Domkundwar/ Dhanpat Rai
• 3. Refrigeration and Air Conditioning /Manohar Prasad
• 4. Refrigeration and Air Conditioning /Stoecker /McGraw Hill
• 5. Basic Refrigeration & Air Conditioning – P.N. Ananthanarayanan – McGraw Hill
• 6. Principles of Refrigeration/Dossat /Pearson
• 7. Refrigeration and Air Conditioning – Dr. S.S. Thipse - Jaico
• 8. Refrigeration and Air Conditioning /Jordan & Preister /Prentice Hall M. Tech – I Year – II Sem. (Energy Systems)