Experimental Analysis of Vapour Compression Refrigeration System with Diffuser at Condenser Inlet
R. T. Saudagar1, U. S. Wankhede2
1Rizwankhan Taslimkhan Saudagar, Assistant Professor, Department of Mechanical Engineering and Technology, Yavatmal, Maharashtra, India.
2Dr. U. S. Wankhede, Professor, Department of Mechanical Engineering, Nagpur, Maharashtra, India.
Manuscript received on March 21, 2013. | Revised Manuscript received on April 10, 2013. | Manuscript published on April 30, 2013. | PP:182-186 | Volume-2, Issue-4, April 2013. | Retrieval Number: D1350042413/2013©BEIESP

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Abstract: This paper discusses design and testing of diffuser at condenser inlet in vapour compression refrigeration system. Four diffusers with divergence angle 10⁰, 15⁰, 20⁰ and 30⁰ were designed for same inlet and outlet diameters. The diffusers used were with inlet diameter equal to discharge tube diameter of compressor and outlet diameter equal to condenser inlet diameter. The system was analysed using the first and second laws of thermodynamics to determine the refrigerating effect, the compressor work input, coefficient of performance (COP) and the rate of heat rejected from the system. During the test, the COPs of the system without diffuser and with optimized diffuser at condenser inlet were found out. With diffuser at condenser inlet, amount of heat rejected from condenser is also increased. To remove the same amount of heat, less heat transfer area required. This concept reduces size of condenser to achieve the same system efficiency.
Keywords: Condenser, Diffuser, Experimental analysis, Vapour compression refrigeration system.