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Zeotropic and Azeotropic refrigerants are the feasible replacements to HCFC due to ecological tribulations; and the production of most widely used HCFC-22 has been banned by the Montreal Protocol and UNFCCC Regulation. This paper presents an experimental study on heat transfer characteristics in evaporation of zeotropic mixture R407C and quasi-azeotropic blend R410A through small diameter (ID 7.0mm) smooth tube inclined at seven different angles from 00 to 900. Experimental data were acquired over an imposed heat flux range of 5-10kW/m2 and the refrigerant mass velocity was varied from 80 to 300kg/m2s at an evaporating temperature range of -50C to +80C. The investigation verified that the heat transfer characteristic of R410A was better than R407C at all inclinations of the tube

Performance Comparison of Zeotropic and Azeotropic Refrigerants in Evaporation Through Inclined Tubes