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Research Article

Performance study of aluminium oxide based nanorefrigerant in an air-conditioning system

Mohammed Dilawara, Adnan Qayoum

Department of Mechanical Engineering, National Institute of Technology Srinagar, J&K, India-190006

Keywords

Abstract



Nanorefrigerant;


Power Saving;


Heat Transfer Enhancement;


Thermal conductivity;


COP

The present issues related to global warming have attracted refrigerants with low Global Warming Potential (GWP). Two of the most promising low-GWP refrigerants, R32 (difluoromethane) and R290 (propane) are flammable. The addition of a flame retardant to R290 or R32 can enhance their flammable characteristics. Trifluoroiodomethane (R13I1) is a flame retardant with an enormously low global warming and can be used as a component of the refrigerant. In addition, dispersing nanoparticles in these refrigerants improves thermal conductivity. Nanorefrigerants are new refrigerants possessing better heat dissipation performance over traditional refrigerants. An ultra-low GWP mixture refrigerant consisting of R32, R161 and trifluoroiodomethane with aluminum oxide (Al2O3) nanoparticles is used in the present study. Simulation Model-based theoretical results of R410a and with R410a/Al2O3, mixture refrigerant (R32, R161 and trifluoroiodomethane) and nanorefrigerant (R32, R161 and trifluoroiodomethane with aluminum oxide nanoparticles) are carried. The study shows the coefficient of performance (COP) of R410a/Al2O3 and M (R32/R161/R13I1)/Al2O3 increased by 47.3% and 89.8% respectively. The power-saving up to 31.8% and 47.2% at a volume concentration of 0.09%. The comparison has been made with reference to the R410a/Al2O3 system. The thermophysical properties of refrigerants have been calculated using REFPROP (NIST properties of fluid reference). The theoretical model-based calculations are computed in MATLAB software. This study provides an insight in providing appropriate refrigerant substitutes for air conditioning systems.

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2023 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.



2023 Best Paper Award:

The paper authored by Ferzan Fidan, Naim Aslan, Mümin Mehmet Koç entitled as “Morpho-structural and compressive mechanical properties of graphene oxide reinforced hydroxyapatite scaffolds for bone tissue applications” is awarded.



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The paper authored by Ercan Işık, Ehsan Harirchian, Hüseyin Bilgin, Kirti Jadhav entitled as “The effect of material strength and discontinuity in RC structures according to different site-specific design spectra" is awarded.


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