JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Fundamentals of Refrigeration vapour compressors refrigeration - working principle, cycle COP - refrigeration cycle in T-s and P-h coordinates, Effect of sub cooling & super heating and cycle analysis and problems using P-h charts. Vehicle cooling, load estimation, capacity requirements of Air Conditioning System, refrigerants used in Automobiles – properties.

UNIT - II

Introduction to Air Conditioning – Psychrometric properties and processes, sensible and latent heat loads, characterization and SHF load for ventilation and filtration, concepts of RSHF& SHF ESHF and ADP, concepts of human comfort and effective temperature. Components of Air conditioners: Air-conditioning Components: Compressor-Evaporator- Condenser- Expansion valve-Receiver Drier- Filters-Mufflers -special features-compressor protection Anti freezing relay.

UNIT - III

Operation of an Air-conditioning System: Type of Air conditioners. Heaters-Vehicle ventilation-combination heater and air conditioner-manually controlled air conditioner and heater system- automatically controlled air conditioner and heater systems. Air Heating equipment, Ducts, Registers and Grills, blowers, filters

UNIT - IV

Trouble Shooting and Services: Servicing of heating Systems, Causes of air conditioner Failure, leak testing guide, discharging the system- Evacuating the system-charging the System-trouble shooting air conditioner heater Systems.

UNIT - V

Servicing of Air Conditioners - Heating Systems: Air conditioner maintenance and service. Compressor trouble shooting and service, clutch service- shaft seal leakage compressor. Seal removal checking oil level-oil addition, repairs on compressors.

TEXT BOOK:

• 1. Automotive Air-conditioning - By William H. Grouse & Donald L. Angtin. MH
• 2. Automotive Air-conditioning and climate control system, by Steven Daly, Elsevier, Distributed by Yes Dee Publishing Pvt. Ltd.

REFERENCES:

• 1. Automotive Air-conditioning- By Lesile F.Gomgs. McGraw Hil1
• 2. Automotive Air-conditioning- By Boyce H. Dwiggins. Reston Pub. R16 B.TECH AUTOMOBILE ENGG.
• 3. Automotive Technology Heating and Air conditioning by Russell Carrigan, John Eichelberger. Cengage Learning, Distributed by Yes Dee Publishing Pvt. Ltd.
• 4. Refrigeration & Air Conditioning by CP Arora R16 B.TECH AUTOMOBILE ENGG.