Analyzing the Impact of using Sio2 and Graphene Oxide Nanoparticles Over the Performance of Vapor Compression Refrigeration System

Abstract

Any refrigeration and air conditioning system produce heat as a byproduct. The rate of temperature rise in a vapor compression refrigeration system is determined by the difference between the rates of heat generation and loss. The same rules apply to heat transport in the compressor, condenser, and evaporator. The technique of mixing nanofluids and suspending nanophase particles in the base fluid will be thoroughly investigated in this study. The experiment was conducted out on a test rig with different percentages of nanoparticles in the base fluid. To improve the efficiency of the test rig, silicon dioxide (SiO₂) and graphene oxide nanoparticles are used as potential additives to the refrigerant 1,1,1,2-tetrafluoroethane (R-134a) and the lubricant Polyol-ester (POE) oil. The stability of SiO₂ and Graphene oxide nanoparticles in oil is investigated experimentally. In stationary circumstances for lengthy periods of time, nanoparticles were shown to be more persistently suspended in mineral oil than in refrigerants. SiO₂ and Graphene oxide at particular concentrations from 0.25 to 1.5% with 0.25% increment (by a mass fraction) were added to the R-134a refrigerant and compressor oil. Energy consumption and C.O.P tests were used to assess the performance of nanoparticles. According to the findings, using nanorefrigerant instead of traditional refrigerant raised the device's C.O.P by 16.31%, while using nano-oil instead of pure oil increased it by 19.38%. Additionally, by combining nano-oil and nano-refrigerant, the usage of nanoparticles minimizes compressor effort and saves the most energy.