THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Authors of this Paper

External Links

online first only

Thermodynamical study and Taguchi optimization of a two-stage vapor compression refrigeration system

ABSTRACT
This study's primary purpose is to optimize the multistage refrigeration system with statistical methods. Taguchi optimization and ANOVA methods were applied to statistically determine the effects of components on system performance. The best operational conditions were defined for the maximum COP and exergy efficiency. Critical parameters have been determined to maximize the system's performance. The evaporator temperature was defined as the most vital parameter (46.32%), and it is followed by condenser temperature (32.65%) for the maximum Coefficient of Performance (COP). The most important two parameters are determined as evaporator temperature with 29.14% and condenser temperature with 20.34% for maximum exergetic performance. As a result of 27 tests, the highest COP of the system was calculated as 2.67 and exergy efficiency as 55.22%. By using the optimum levels determined by Taguchi, it was ensured that the system's COP was increased to 3.326 and its exergy efficiency to 71.23%. ANOVA analyses indicate that the results' confidence level is relatively high, to be 99.9%. Another parameter examined in this study is the inter-stage level determination method and its effect on system performance. The method of determining the optimum inter-stage level may vary according to the objective function and system conditions.
KEYWORDS
PAPER SUBMITTED: 2021-11-11
PAPER REVISED: 2022-03-22
PAPER ACCEPTED: 2022-04-08
PUBLISHED ONLINE: 2022-05-22
DOI REFERENCE: https://doi.org/10.2298/TSCI211111054K
REFERENCES
  1. S. S. Baakeem et al., Optimization of a multistage vapor-compression refrigeration system for various refrigerants, Applied Thermal Engineering, 136 (2018), February, pp. 84-96.
  2. K. Chopra et al., Energy, exergy and sustainability analysis of two-stage vapour compression refrigeration system, Journal of Thermal Engineering, 1 (2015), 4, pp. 440-445.
  3. S. S. Seyitoǧlu and A. Kiliçarslan, Second law analysis of different refrigerants in a two stage vapor compression cycle, Isi Bilimi Ve Teknigi Dergisi/ Journal of Thermal Science and Technology, 35 (2015), 2, pp. 89-97.
  4. A. Kilicarslan and M. Hosoz, Energy and irreversibility analysis of a cascade refrigeration system for various refrigerant couples, Energy Conversion Management, 51 (2010), 12, pp. 2947-2954.
  5. C. Nikolaidis and D. Probert, Exergy-method analysis of a two-stage vapour-compression refrigeration-plants performance, Applied Energy, 60 (1998), 4, pp. 241-256.
  6. S. M. Zubair et al., Second-law-based thermodynamic analysis of two-stage and mechanical-subcooling refrigeration cycles Analyse thermodynamique, International Journal of Refrigeration, 19 (1996), 8, pp. 506-516.
  7. N. Arslanoglu and A. Yigit, Experimental investigation of radiation effect on human thermal comfort by Taguchi method, Applied Thermal Engineering, 92 (2016), pp. 18-23.
  8. A. Ustaoglu et al., Performance optimization and parametric evaluation of the cascade vapor compression refrigeration cycle using Taguchi and ANOVA methods, Applied Thermal Engineering, 180 (2020), May, p. 115816.
  9. A. R. Motorcu et al., Effects of control factors on operating temperatures of a mechanical heat pump in waste heat recovery: Evaluation using the Taguchi method, Thermal Science, 22 (2018), 1, pp. 205-222.
  10. A. S. Canbolat et al., Performance optimization of absorption refrigeration systems using Taguchi, ANOVA and Grey Relational Analysis methods, Journal of Cleaner Production, 229 (2019), pp. 874-885.
  11. W. Koch, Why Your Fridge Pollutes and How It's Changing, National Geographic Magazine
  12. Overview of Advantages and Disadvantages of Alternatives, in Technical Meeting on HCFC Phase-Out.
  13. R290 Refrigerant Grade Propane.
  14. S. Liu et al., Performance analysis of two-stage compression transcritical CO2 refrigeration system with R290 mechanical subcooling unit, Energy, 189 (2019), p. 116143.
  15. I. Dincer, Refrigeration Systems and Applications. West Sussex, England: John Wiley & Sons, Ltd., 2003.
  16. Ashrae, ASHRAE Position Document on Ammonia as refrigerant, ASHRAE, 2014.
  17. İ. Dinçer, Heat Transfer in Food Cooling Applications. Washington (D.C.) : Taylor and Francis, 2020.
  18. G. Lorentzen, Ammonia: an excellent alternative, International Journal of Refrigeration, 11 (1988), 4, pp. 248-252.
  19. W. F. Walter et al., Designation and safety classification of refrigerants, ASHRAE Standarts, 4723, 34, 2004.
  20. A. Mota-Babiloni et al., Ultralow-temperature refrigeration systems: Configurations and refrigerants to reduce the environmental impact, International Journal of Refrigeration, 111 (2020), March, pp. 147-158.
  21. E. Torrella et al., Experimental evaluation of the inter-stage conditions of a two-stage refrigeration cycle using a compound compressor, International Journal of Refrigeration, 32 (2009), 2, pp. 307-315.
  22. M. A. Çengel, Y. A. and Boles, Thermodynamics: An Engineering Approach, 4th ed. New York: McGraw Hill, 2002.
  23. R. Prasad, Optimum Design Of Multistage Vapour Compression Refrigeration System, Indian Institute of Technology, Kanpur, 1983.
  24. W. B. Gosney, Principles of Refrigeration. Cambridge University Press., 1982.
  25. De Lepeleire, Une nouvelle fac¸on d'appre´ciation et de se´ lection des compresseurs frigorifiques bie´tage´ s., in XIII International Congress of Refrigeration, (1973), pp. 39-48.
  26. M. Prasad, Optimum interstage pressure for two stage refrigeration system, ASHRAE Journal, 23 (1981), pp. 58-60.
  27. S. M. Zubair and S. H. Khan, On optimum interstage pressure for two-stage and mechanical-subcooling vapor-compression refrigeration cycles, Journal of Solar Energy Engineering, Transactions of the ASME, 117 (1995), 1, pp. 64-66.
  28. E. B. Ratts and J. Steven Brown, A generalized analysis for cascading single fluid vapor compression refrigeration cycles using an entropy generation minimization method, International Journal of Refrigeration, 23 (2000), 5, pp. 353-365.
  29. R. K. Mobley, 36 - Compressors, R. K. B. T.-P. E. H. Mobley, Ed. Woburn: Butterworth-Heinemann, (2001), pp. 601-614.
  30. A. Ouadha, M. En-nacer, L. Adjlout, and O. Imine, Exergy analysis of a two-stage refrigeration cycle using two natural substitutes of HCFC22, International Journal of Exergy, 2 (2005 ), 1, pp. 14-30, 2005, doi: 10.1504/IJEX.2005.006430.
  31. R. Jones, Design and Analysis of Experiments (fifth edition), Douglas Montgomery, John Wiley and Sons, Qual. Reliab. Eng. Int., 18 (2002), 2, p. 163.