Theoretical analysis of the performance improvement of a single stage vapour compression refrigeration system when using a nanorefrigerant instead of the pure refrigerant

Feiza Memet

doi:10.1117/12.2642035

2 March 2023 Theoretical analysis of the performance improvement of a single stage vapour compression refrigeration system when using a nanorefrigerant instead of the pure refrigerant

Feiza Memet

Author Affiliations +

Proceedings Volume 12493, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI; 124930E (2023) https://doi.org/10.1117/12.2642035
Event: Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies 2022, 2022, Constanta, Romania

Abstract

Vapour compression refrigeration systems (VCRS) are present in various applications of refrigeration; they work with high power consumption and rise environmental concerns. Important features of VCRS working with R134a are reflected in significant energy consumption and environmental issues. This is why the analysis of performances terms, such as power consumption and Coefficient of Performance (COP), is mandatory. The adoption of nanorefrigerants is a promising step towards new working fluids to be used in refrigeration systems. The environmental issue specific to the traditional R134a can be diminished by replacing it with nanorefrigerants- resulted by adding of nanoparticles to the pure refrigerant (R134a). Traditionally used R134a contributes to the global warming. This problem is associated with the need to improve the efficiency of the plant. The solution is the adoption of a new refrigerant: the nanorefrigerant. This paper focuses on the performance improvement of VCRS working with R134a and R134a/Al₂O₃. The theoretical comparison is developed considering the evaporator temperature of –10° C and a condensing temperature in the range (30÷50)° C. The performance of the system is analysed in terms of work consumption and COP. Since the adoption of R134a/Al₂O₃ will reveal a gain in the energy efficiency (13%) when rising the condensing temperature, the analysis will continue with the performance assessment when the concentration of nanoparticles will vary in the range (0.05÷0.50)%. Results indicate that a 10 times increase in Al₂O₃ concentration will lead to about 77% decrease in work consumption.

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Feiza Memet "Theoretical analysis of the performance improvement of a single stage vapour compression refrigeration system when using a nanorefrigerant instead of the pure refrigerant", Proc. SPIE 12493, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies XI, 124930E (2 March 2023); https://doi.org/10.1117/12.2642035

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KEYWORDS

Nanoparticles

Aluminum

Liquids

Thermodynamics

Climate change

Energy efficiency

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