Experimental energetic and exergetic performance evaluation of refrigeration systems using Al2O3 and TiO2 nanoparticles operating with HFO-1234yf refrigerant

Abstract In this study, the performance of TiO 2 and Al 2 O 3 nanoparticles with R1234yf refrigerant in a vapor compression refrigeration system is investigated. Nanoparticles are an effective approach to achieving energy savings while simultaneously reducing emissions. Using R1234yf refrigerant at varying mass concentrations and operating settings for TiO 2 and Al 2 O 3 nanolubricants, experiments were carried out to evaluate the performance of vapor compression refrigeration systems. In this study, the thermodynamic and environmental performances of single-type nanoparticles (TiO 2 and Al 2 O 3 ) used at concentration (0.5 mass%) in vapor compression refrigeration systems (VCRS) were investigated. The system with TiO 2 nanolubricant showed the best cooling capacity performance at 0.5% by mass concentration, with an average improvement of 12% and 28.1% power consumption reduction. Al 2 O 3 nanolubricant, at 0.5% mass concentration, achieved 9.1% higher performance improvement and 25.7% power consumption reduction. When POE was used to assess the VCRS’s energy efficiency, an improvement of 22.4% was achieved with 0.5% TiO 2 nanolubricant by mass. The most favorable exergoeconomic outcome was seen for the 0.5% TiO 2 nanolubricant, with an increase of 28.16% compared to POE. The best environmental performance was achieved with a 28.1% reduction in the 0.5% TiO 2 single-type nanolubricant by mass. In summary, the nanoparticle has a good impact on the VCRS performance in a variety of ways.