Investigation on the Intake Process for a Theoretical Twin Opposite Piston Compressor Using R744 Refrigerant

Abstract:

This study aims to validate the use of R744 for a resonant twin piston compressor for domestic applications. The vapor-compression refrigeration is the most commonly approached method for cooling household appliances such as refrigerators and air conditioning systems. The R134a refrigerant is one of the most suitable refrigerants from an energetic point of view. R744 (CO₂) compressors are less efficient, but the fact that the R134a raises serious environmental issues pushes commercial trend towards the usage of R744 [1]-[3]. Use of R744 in household appliances is currently an open topic and no company has switched yet to the environmental-friendly alternative. In this paper the fill efficiency will be simulated in order to validate if a conventional compressor such as the opposite twin piston compressor is capable of filling with refrigerant when operating at a 50Hz frequency. Such a validation can enable further investigations regarding the replacement of R134a with R744.

• Periodical: Applied Mechanics and Materials (Volume 823)
• Pages: 75-78
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.823.75
• Online since: January 2016
• Authors: Doru Groza*, Dan Mihai Dogariu
• Keywords: CFD, Opposite Piston Compressor, R744

References

[1] C. Aprea, A. Greco, A. Maiorino, The substitution of R134a with R744: An exergetic analysis based on experimental data, International Journal of Refrigeration, 2013, V. 36, Issue 8, pp.2148-2159.

DOI: 10.1016/j.ijrefrig.2013.06.012

[2] r744. com Everything R744, The Natural Refrigerant, Use CO2 to cool refrigerators, (2014).

[3] r744. com Everything R744, The Natural Refrigerant, Knowledge, 2006-(2015).

[4] C. Aprea, A. Greco, A. Maiorino, An experimental evaluation of the greenhouse effect in the substitution of R134a with CO2, Energy, 2012, 45, pp.753-761.

DOI: 10.1016/j.energy.2012.07.015

[5] Commission Directive 2003/66/EC, 3 July 2003, European Parliament and Council.

[6] Commission Directive 97/68/EC, 16 December 1997, European Parliament and Council.

[7] S. Itoh, World's First CO2 Air Conditioning System, Auto Zeitung Technik, 2004, V. 4, Issue 1, pp.40-43.

[8] J. M. Hollerbach, I. W. Hunter, J. Ballantyne, A Comparative Analysis of Actuator Technologies for Robotics, MIT Press Cambridge, 1992, ISBN: 0-262-11171-3.

[9] J. M. Hollerbach, I. W. Hunter, J. Ballantyne, A Comparative Analysis of Actuator Technologies for Robotics, MIT Press Cambridge, 1992, ISBN: 0-262-11171-3.

[10] B. Ku, J. Park, Y. Hwang, J. Lee, Performance Evaluation of the Energy Efficiency of Crank-Driven Compressor and Linear Compressor for a Household Refrigerator, International Compressor Engineering Conference, (2010).

[11] Commission Directive 86/594/EC, 1 December 1986, The Council of The European Communities.

[12] Commission Directive 2000/14/EC, 8 May 2000, European Parliament and Council.

[13] Dong-Koo Shin, US Patent 6802700 B2, LG Electronics, (2004).

[14] Comsol help, information on http: /www. comsol. com.