Most of refrigerants used in vapor Compression system were Chlorofluorocarbon (CFCs) and Hydro Chlorofluorocarbon(HCFCs) which contains chlorine and if any leakage in the system, these gases will group and reach stratosphere. The chlorine atoms in the gases will act as a catalyst to destroy ozone layer and cause ozone depletion which causes health hazards, global warming, melting of polar ice caps and drought. Hence, it is necessary to minimize the Global warming and Ozone depletion. The refrigerant R22 widely used in the air conditioners is a major Contributor of Chlorofluorocarbons (CFCs) which cause irreparable loss to the ozone layer and has to be replaced. There are two types of global warming contributions through refrigeration and air conditioning systems. The first one is the Direct Global Warming Potential (DGWP) due to the emission of refrigerants and their interaction with heat radiation. The second one is the Indirect Global Warming Potential (IDGWP) due to the emission of Carbon Dioxide (CO2) by consuming the energy that is generated through the combustion of fossil fuels. Experimental work has been performed on three capillary tubes of different diameter to determine the performance of domestic water cooler when a extemporaneous is liquefied petroleum gas (LPG) which is locally available and comprises 24. 4% propane, 56. 4% butane and 17. 2% iso butane which is very from company to company. The LPG is cheaper and possesses an environmental friendly nature with no ozone depletion potential (ODP). It is used in world for cooking purposes.

1. Shank K. Wang, Handbook of air conditioning and refrigeration" Edition.
2. A. Baskaran, P. Koshy Mathews, International Journal of Scientific and Research Publications", Volume 2, Issue 9, 1 ISSN 2250-3153, September 2012
3. B. O. Bolaji, Investigating the performance of some environment-friendly refrigerants as alternative to R12 in vapour compression refrigeration system", PhD Thesis in the Department of Mechanical Engineering, Federal University of Technology Akure, Nigeria (2008).
4. Prashant Sharma, Rahul Sharma, "International Journal of Latest Research in Science and Technology" ISSN (Online):2278-5299 Vol. 1, Issue 1:45-48, May-June (2012)
5. ASHRAE, "Thermo physical Properties of Refrigerants", Chapter 20, ASHRAE Fundamental, In c. Atlanta 20 (2001) 1-67.
6. W. F Stoecker. , and J. W. Jones, "Refrigeration and Air conditioning", TATA McGraw-Hill pub. Co. Ltd. pp. 264.
7. ASHRAE, 2002, "Adiabatic capillary tube selection", Refrigeration Handbook, chapter. 45,pp. 45. 26-45. 30, ASHRAE.
8. "PCRA energy audit report", HPCL LPG bottling plant Asauda Bahadurgarh (Haryana) Dec. 2006.
9. "Basic statics on Indian petroleum and natural gas"2006-07. 10. Shank K. Wang,"Handbook of air conditioning and refrigeration "page no. 11. 14 chapter 11.
10. ASHRAE handbook 1998.
11. C. P. ARORA, "Hand book of Refrigeration and air conditioning", by page no. 425
12. A. Bejan, "The thermodynamic design of heat and mass transfer processes and devices", Heat and Fluid Flow pp. 258-276, 1987
13. A. S. Dalkilic, A. S. and Wongwises, S. (2010). A performance comparison of vapour-compression refrigeration system using various alternative refrigerants. International Communications in Heat and Mass Transfer. Vol. 37; 1340–1349.

Global Warming Vapour Compression Cycle Refrigerant Coefficient Of Performance.