Abstract: The Montreal Protocol has sealed the use of Halogenated Hydrocarbons; keeping in view they affect the environment in the form of Ozone layer depletion and Global warming. Thus one of the major thrust areas is to identify substitute of Halogenated Hydrocarbons, especially CFCs. The substitute refrigerant should be eco-friendly, chemically stable and compatible with existing refrigeration systems with transport and thermal properties similar to or better than CFCs. According to the recent studies carried by U.S. energy development society, approximately 75 million new refrigerators are manufactured would wide every year and year and the total number of refrigerators will cross 100 million mark by the year 2010. Since the refrigeration system use CFC- 12 as refrigerant universally, the search for a suitable alternative for CFC-12 is inevitable. HFC-134a is currently the leading alternative to CFC-12. Other promising substitutes are R-407c a ternary mixture of HFC-32 & HFC-125 & HFC-134a. R-507 Binary mixture of HFC-143a & HFC-125 and R-404a is a ternary mixture of HFC-125, HFC-143a, HFC-134a. The present work aims to analysis suitability of three newly discovered mixtures R-407c R-507 & R-404A for replacement of CFC-12 in existing refrigeration units. A cycle analysis has been carried out to predict the performance of system under various operation conditions. In this paper, performance evaluation of eco-friendly alternate refrigerant 407c, R-507 & R-404a for replacing CFC12 has been done and a suitable alternative refrigerant for retrofitting has been identified.
The Montreal Protocol has sealed the use of Halogenated Hydrocarbons; keeping in view they affect the environment in the form of Ozone layer depletion and Global warming. Thus one of the major thrust areas is to identify substitute of Halogenated Hydrocarbons, especially CFCs. The substitute refrigerant should be eco-friendly, chemically stable and compatible with existing refrigeration systems with transport and thermal properties similar to or better than CFCs. Since the refrigeration system use CFC- 12 as refrigerant universally, the search for a suitable alternative for CFC-12 is inevitable.HFC-134a is currently the leading alternative to CFC-12. Other promising substitutes are R-507 as a binary mixture of R-143a & R-125, R-407c ternary mixture of R-134a, R-32 & R-125 and R-404a ternary mixture Of R-134a, R-143a & R-125 In this paper, performance evaluation of eco-friendly alternate refrigerant R-134a, R-507a, R-407c & R-404a for replacing CFC12 has been done and a suitable alternative refrigerant for retrofitting has been identified.
Keywords: Ozone depletion, Montreal protocol, eco-friendly refrigerant, hydrocarbon refrigerant, retrofits.
Title: Performance Evaluation of Eco- Friendly Alternate Refrigerants for VCRS
Author: Lalit Narayan, Abhishek Arya
International Journal of Engineering Research and Reviews
ISSN 2348-697X (Online)
Research Publish Journals
