JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Vapour Compression System: Analysis of vapour compression refrigeration cycle Reverse Carnot Cycle for vapour. Effect of suction temperature and condensing temperature on cycle performance. Practical refrigeration cycle, Sub cooled liquid and super heated vapour refrigeration cycles, their effect on performance. Multi-pressure system. Removal of flash gas, inter cooling. Compound compression- Multi vapour- Cascade system- dry ice system

UNIT - II

Vapour Absorption System: Simple vapour Absorption system-Actual vapour absorption cycle- representation on enthalpy concentration h-c diagram, Water lithium bromide absorption system. Electrolux refrigerator- Aqua Ammonia Refrigeration System – Enthalpy Concentration Diagram

UNIT - III

Aircraft Refrigeration: Thermodynamic Cycle – Different systems – Analysis – Comparison Un Conventional Refrigeration: Thermoelectric refrigeration system, Vortex refrigeration system, Pulse refrigeration.

UNIT - IV

Steam jet water vapour system: Analysis and Excercises Industrial Refrigeration: Chemical and process industries, Diary plants, Petroleum Refineries

UNIT - V

Refrigerants: Primary and secondary refrigerants. Designation of refrigerants, Desirable properties of refrigerants such as solubility in water and lubricating oil. Material compatibility, Toxicity, Flammability, Thermodynamic properties of refrigerants, Inorganic, Halocarbon refrigerants. Secondary refrigerants. Refrigerants mixtures, Need for Alternate refrigerants – Retrofitting aspects

REFERENCES:

• 1. Principles of Refrigeration / Roy. J. Dossat
• 2. Refrigeration and Air Conditioning / F. Stoecker & Jerold. W. Jones./ MGH Intrl 1982
• 3. Refrigeration and Air Conditioning / C.P Arora./ TMG).
• 4. Refrigeration and Air Conditioning /Manohar Prasad.