THEORETICAL INVESTIGATION OF PERFORMANCE OF VAPOR COMPRESSION COOLING CYCLE FOR DME, R125, R134A, R143A, R152A, AND R32 REFRIGERANTS AND THEIR MIXTURES

In this study, the performances of refrigerant mixtures in ideal vapor compression refrigeration cycles were investigated theoretically. By choosing six different refrigerants as dimethyl ether (DME), R125, R134a, R143a, R152a, and R32, eleven different refrigerant mixtures were handled. Each mixture's vapor compression refrigeration cycle performances were evaluated according to three different condenser outlet temperatures and nine different mass fractions (90%/10% to 10%/90%). To examine the thermodynamic performance of refrigerant mixtures, constant evaporator outlet temperature (-10 oC) and different constant condenser outlet temperatures (20 oC, 25 oC, and 30 oC) were determined. According to the evaluated refrigerant mixtures, the COPR values of the refrigerant mixtures containing DME were calculated as the highest among all the mixtures. In the mixtures containing DME, it was observed that the COPR values decreased as the mass percentage of DME decreased. The COPR values are calculated in the range of 3.66-5.70 for the R134a/R32 mixture, 3.82-5.81 for the R134a/R143a mixture, 3.97-5.99 for the R143a/R32 mixture, 3.83-5.83 for the R125/R143a mixture, 3.86-5.98 for the R125/R32 mixture, 4.34-6.24 for R134a/R152a mixture, 3.78-5.81 for R143a/R152a mixture, 3.57-5.55 for R152a/R32 mixture, 3.40-6.28 for DME/R125 mixture, 4.34-6.27 for DME/R134a mixture and 3.59-5.82 for the DME/R32 mixture. When the pure forms and mixtures of the refrigerants discussed in the study are compared, it is seen that the pure DME and R32 gases are slightly more performant than the gas mixtures examined. The R125 gas mixture shows a higher performance than the pure R125 gas, and the R134a and R143a mixtures show slightly higher performance than the pure gas forms. Finally, the specific energies of pure refrigerants and refrigerant mixtures were calculated within the scope of the study. DME has the highest specific energy among pure refrigerants, while DME/R32 mixture has the highest specific energy among refrigerant mixtures.

Keywords:

Refrigerant mixture, Dimethyl Ether, R125, R134a, R143a, R152a, R32 COPR,

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[1] Dalkılıç, A.S. (2012). Theoretical analysis on the prediction of performance coefficient of two-stage cascade refrigeration system using various alternative refrigerants. Journal of Thermal Science and Technology, 32 (1), 67–79.
[2] Ismael Hasan, M. and Mohsin Chitheer, J. (2021). Theoretical analysis of vapour refrigeration cycle with hybrid refrigerant of different types and mixing ratios. University of Thi-Qar Journal for Engineering Sciences, 111 (2), 24–32.
[3] Kılıç, B. and İpek, O. (2021). Performance analysis of vapor compression refrigeration system using mixed refrigerant R410a. International Journal of Energy Applications and Technologies, 8 (2), 60–64.
[4] Taylor, J.J., Carson, J.K., Hoang, D.K., Walmsley, T.G., Chen, Q. and Cleland, D.J. (2022). Use of refrigerant blends to improve thermal efficiency of heat pump cycles. Chemical Engineering Transactions, 94 (1), 1189–1194.
[5] Wu, Y., Zhang, H., Zhang, Q., Qiu, J. and Rui, S. (2017). The study of thermodynamic properties of zeotropic mixtures of R600a/R23/R14. Advances in Mechanical Engineering, 9 (3), 168781401769121.
[6] Zühlsdorf, B., Jensen, J.K., Cignitti, S., Madsen, C. and Elmegaard, B. (2017). Improving efficiency of heat pumps by use of zeotropic mixtures for different temperature glides. Proceedings of ECOS 2017: 30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, San Diego, California, USA, 2-6 July 2017.
[7] Khordad, R. and Mirhosseini, B. (2015). Transport Properties of refrigerant mixtures: thermal conductivity. Iranian Journal of Chemistry and Chemical Engineering, 34 (1), 75–85.
[8] Baskaran, A. and Mathews, K. (2015). Thermodynamic analysis of R152a and Dimethylether refrigerant mixtures in refrigeration system. Jordan Journal of Mechanical and Industrial Engineering, 9 (4), 289–296.
[9] Saleh, B., Aly, A.A., Alsehli, M., Elfasakhany, A. and Bassuoni, M.M. (2020). Performance analysis and working fluid selection for single and two stages vapor compression refrigeration cycles. Processes, 8 (9), 1017.
[10] Sawjanya, Y. and Rao, Y.C. (2007). Prediction of VLE data for alternative refrigerant mixtures. Korean Journal of Chemical Engineering, 24 (1), 106–112.
[11] Bolaji, B.O. and Huan, Z. (2013). Thermodynamic analysis of the performance of a vapour compression refrigeration system, working with R290 and R600a mixtures. Scientia Iranica B, 20 (6), 1720–1728.
[12] Arcaklioğlu, E. and Erişen, A. (2003). Soğutucu akışkan karışımlarının buhar sıkıştırmalı soğutma sisteminde termodinamik analizi. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi, 9 (2), 153–162.
[13] Ranjan Panda, S. and Behera, P. (2019). Experimental research on the performance of environmental friendly refrigerant mixtures in a vapour compression refrigeration system. Proceedings of International Conference on Artificial Intelligence in Manufacturing & Renewable Energy (ICAIMRE), Bhubaneswar, India, 25-26 October 2019.
[14] Gil, B., Fievez, A. and Zajaczkowski, B. (2021). Pool boiling heat transfer coefficient of dimethyl ether and its azeotropic ternary mixtures. International Journal of Heat and Mass Transfer, 171 (1), 121063.
[15] Gil, B. and Fijałkowska, B. (2019). Experimental study of nucleate boiling of flammable, environmentally friendly refrigerants. Energies, 13 (1), 160.
[16] NIST. (2020). NIST chemistry webbook, SRD 69, thermophysical properties of fluid systems. National Institute of Standards and Technology, USA.
[17] ASHRAE. (2008). ASHRAE standard designation and safety classification of refrigerants.
[18] Good, D.A., Francisco, J.S., Jain, A.K. and Wuebbles, D.J. (1998). Lifetimes and global warming potentials for dimethyl ether and for fluorinated ethers: CH3 OCF3 (E143a), CHF2 OCHF2 (E134), CHF2 OCF3 (E125). Journal of Geophysical Research: Atmospheres, 103 (D21), 28181–28186.
[19] Roy, Z. and Halder, G. (2020). Replacement of halogenated refrigerants towards sustainable cooling system: a review. Chemical Engineering Journal Advances, 3 (1), 100027.
[20] Cengel, Y.A. and Boles, M.A. (2015). Thermodynamics: an engineering approach. 8th Edition McGraw-Hill.