Cop Enhancement of Vapour Compression Refrigeration System
B Sairamakrishna1, T Gopala Rao2, N Rama Krishna3
1B Sairamakrishna, Asst Professor, Department of Mechanical Engineering, Amrita Sai Institute of Science and Technology, Paritala, India.
2T Gopala Rao, Asst Professor, Department of Mechanical Engineering, Amrita Sai Institute of Science and Technology, Paritala, India.
3N Rama Krishna, Asst Professor, Department of Mechanical Engineering, Amrita Sai Institute of Science and Technology, Paritala, India.
Manuscript received on 01 April 2021 | Revised Manuscript received on 15 April 2021 | Manuscript Accepted on 15 June 2021 | Manuscript published on 30 June 2021 | PP: 1-6 | Volume-1 Issue-2, June 2021 | Retrieval Number: 100.1/ijpte.B2004041221 | DOI: 10.54105/ijpte.B2004.061221
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© The Authors. Published by Lattice Science Publication (LSP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This experimental investigation exemplifies the design and testing of diffuser at compressor inlet and nozzle at condenser outlet in vapour compression refrigeration system with the help of R134a refrigerant. The diffuser with divergence angle of 12°,14° and the nozzle with convergent angle 12°,14° are designed for same inlet and outlet diameters. Initially diffusers are tested at compressor inlet diffuser is used with inlet diameter equal to exit tube diameter of evaporator and outlet tube diameter is equal to suction tube diameter of the compressor. Diffuser helps to increases the pressure of the refrigerant before entering the compressor it will be helps to reduces the compression work and achieve higher performance of the vapour compression refrigeration system. Then nozzles are testing at condenser outlet, whereas nozzle inlet diameter equal to discharging tube diameter of condenser and outlet diameter equal to inlet diameter of expansion valve. Additional pressure drop in the nozzle helped to achieve higher performance of the vapour compression refrigeration system. The system is analyzes using the first and second laws of thermodynamics, to determine the refrigerating effect, the compressor work input, coefficient of performance (COP).
Keywords: Diffuser, Nozzle, Coefficient of Performance, Refrigeration effect.
Scope of the Article: Thermodynamics