Thermodynamic, Economic and Environmental Assessment of Vapor Compression Refrigeration System Using Mono and Binary Nanolubricants (TiO2-B)

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Nowadays, the need for energy is gaining significant importance. However, energy consumption in developed countries is quite high. Almost 40% of this energy consumption comes from heating, refrigeration, and air conditioning systems in buildings. Hence, even a minor enhancement in refrigeration systems will lead to energy savings on a global scale. Many studies are being conducted for this circumstance. One of these is the addition of nanoparticles to refrigerants and lubricants. In this study, the effects of mono and binary nanolubricants obtained from different nanoparticles (TiO2 and Boron) used at different concentrations (3.5 g/L and 7 g/L) in the vapor compression refrigeration system were evaluated in terms of energy, exergy, environment, and economy. As a result, a 16.47% increase in COP value was obtained in 7 g/L TiO2-B binary nanolubricant compared to pure POE. The energy consumption of the compressor in the system reduced by 13.06% in the 7 g/L TiO2-B binary nanolubricant compared to POE. A 35.20% decrease in total exergy destruction was detected in 7 g/L TiO2-B binary nanolubricant compared to POE. 43.44% increase in exergy efficiency occurred in 7 g/L TiO2-B binary nanolubricant compared to POE in the system. When the system was examined from an economic perspective, a 35.84% improvement was observed in the 7 g/L TiO2 binary nanolubricant compared to POE. When the system was examined environmentally, an 11.90% reduction was achieved in 7 g/L TiO2-B binary nanolubricant compared to POE. As a result, it is seen that significant improvements occur in the system as the concentration increases when mono and binary nanolubricants are used compared to POE.