Implementation of Natural Refrigerants for Refrigeration and Air Conditioning Systems



The use of halogen based chemical compound as refrigerants has compromised the existence of life in the earth. this fundamental paper discuss the suitability of natural refrigerants CO2 in refrigeration and air conditioning system for high ambient climatic conditions encountered in India The lower critical temperature of CO2 converts the subcritical vapour compression cycle to transcritical mode whenever the ambient temperature crosses the critical temperature of 31 C. the trans critical cycle gives lower cooling capacity and higher compressor power consumption which results in less energy efficiency of the system. the thermo physical and transport properties of CO2 are much better than chemical refrigerants results in compact size of system with competitive energy efficient at lower ambient temperature.


chemical refrigerants, subcritical cycle, transcritical cycle, thermophysical properties of CO2 and NH3.

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Dr. Shivaji Takale

Bharati Vidyapeeth's

Group of Institutes, Technical Campus

College of Engineering Lavale

Mobile: 9881679908


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