Comparative Thermodynamic Analysis of Vapour Compression Refrigeration System with Dedicated Mechanical Subcooling
DOI:
https://doi.org/10.69996/fmep.2025010Keywords:
Refrigeration, VCRS, COP, Subcooling, thermodynamicAbstract
It is known that in countries like India, the demand for high-grade energy is growing continuously. The cost of electricity is also going up with the demand. Many researchers have proved that the Mechanical Sub-cooling of the Vapour Compression Refrigeration (VCR) cycle improves its performance. In the present investigation, a dedicated mechanical sub cooling system from the thermodynamic standpoint is considered. It was found that the system performance improved when operating in situations where the difference between the condensing and evaporating temperatures is large. The improvement of 6-8% in the Coefficient of Performance (COP) and 20- 170% in the capacity over the simple cycle. Using the sub-cooling, the Second Law efficiency of the cycle increased by 21% and this percentage is directly proportional to the ambient temperature.
References
[1] Advantages and Disadvantages of Vapor Compression Refrigeration Cycle over Air Refrigeration System, Mecholic. (n.d.).
[2] S. Agarwal, A. Arora and B. B. Arora, "Thermodynamic performance analysis of dedicated mechanically subcooled vapour compression refrigeration system,” Yildiz Technical University Press, vol.5. no.4, pp.222-236, 2019.
[3] B. A. Qureshi and S. M. Zubair, “Mechanical sub-cooling vapor compression systems: Current status and future directions,” International Journal of Refrigeration, vol.36, pp.2097–2110, 2013.
[4] V. Jain, A. Singhal, G. Sachdeva and S. S. Kachhwaha, “Advanced exergy analysis and risk estimation of novel NH3-H2O and H2O-LiBr integrated vapor absorption refrigeration system,” Energy Convers Manag, vol.224, 2020.
[5] V. Jain and D. Colorado, “Thermoeconomic and feasibility analysis of novel transcritical vapor compression-absorption integrated refrigeration system,” Energy Convers Manag, vol.224, 2020.
[6] B. A. Qureshi, M. Inam, M. A. Antar and S.M. Zubair, “Experimental energetic analysis of a vapor compression refrigeration system with dedicated mechanical sub-cooling,” Appl Energy, vol.102, pp.1035–1041, 2013.
[7] B. A. Qureshi, S. M. Zubair, “The impact of fouling on performance of a vapor compression refrigeration system with integrated mechanical sub-cooling system,” Appl Energy, vol.92, pp.750– 762, 2012.
[8] R. S. Mishra and S. Agarwal, “Thermodynamic analysis of vapor compression refrigeration cycle using expander as an expansion device,” International Journal of Research in Engineering and Innovation, vol.3, no.5, pp.326-329, 2019.
[9] J. García-Ibáñez, G. Valencia-Ochoa and M. Vanegas-Chamorro, “Universidad Autónoma del Caribe Design of a mechanical subcooling system device for increasing a low temperature refrigeration system’s capacity Diseño de un dispositivo de subenfriamiento mecánico para aumentar la capacidad de un ciclo de refrigeración de baja temperatura,” Prospectiva, vol.11, pp.13–20, 2013.
[10] T. S. Mogaji, A. Awolala, O. Z. Ayodeji, P. B. Mogaji and D. E. Philip, “COP enhancement of vapour compression refrigeration system using dedicated mechanical subcooling cycle,” Nigerian Journal of Technology, vol.39, pp.776–784, 2020.
[11] S. M. Zubair, M. Yaqub and S. H. Khan, “PI: SO 140-7007(96)00045-X Second-law-based thermodynamic analysis of two-stage and mechanical-subcooling refrigeration cycles,” International Journal of Refrigeration, vol.19, no.8, pp.506-516, 1996.
[12] S. M. Zubair, “Thermodynamics of a vapor-compression refrigeration cycle with mechanical subcooling,” Energy, vol.19, no.6, pp.707-715, 1994.
[13] B.A. Qureshi and S. M. Zubair, “The effect of refrigerant combinations on performance of a vapor compression refrigeration system with dedicated mechanical sub-cooling,” International Journal of Refrigeration, vol.35, pp.47–57, 2012.
[14] M. Dixit, S. C. Kaushik and A. Arora, “Energy and exergy analysis of absoption-compression cascade refrigeration system,” Journal of Thermal Engineering, vol.3, no.5, pp.1466-1477, 2017.
[15] S. K. Kalla, B. B. Arora and J. A. Usmani, “Performance analysis of R22 and its substitutes in air conditioners,” Journal of Thermal Engineering, vol.4, no.1, pp.1724-1736, 2018.
[16] A. Mota-Babiloni, J. Navarro-Esbrí, A. Barragán-Cervera, F. Molés, B, Peris and G. Verdú, “Commercial refrigeration–an overview of current status,” International journal of refrigeration, vol.57, pp.186-196, 2015.
[17] R. Llopis, R. Cabello, D. Sánchez and E. Torrella, “Energy improvements of CO2 transcritical refrigeration cycles using dedicated mechanical subcooling,” International Journal of Refrigeration, vol.55, pp.129-141, 2015.
[18] A. Arora, B. B. Arora, B. D. Pathak and H. L. Sachdev, “Exergy analysis of a vapour compression refrigeration system with R-22, R-407C and R-410A,” International journal of Exergy, vol.4, no.4, pp.441, 2007.
