PERFORMANCE ANALYSIS AND CHARACTERISTICS OF A DOMESTIC REFRIGERATION SYSTEM USING NANO-LUBRICANT ZIRCONIUM OXIDE (ZRO2) AS AN ADDITIVE

This study suggests ZrO2 nano-oil as a suitable lubricant to improve the efficiency of a
refrigerator compressor that uses vapor compression. Experimental research is done to determine
the stability of SiO2 microparticles in the oil. It was proven that the nanoparticles remained steady
and steadily suspended in the mineral oil for a considerable amount of time. The compressor oil was
supplemented with nano-oil at precise concentrations of 0.1%, 0.2%, and 0.3% (by a mass fraction).
The results reveal that using nano-oil instead of pure oil increased the system's coefficient of
performance by 7.61%, 14.05%, and 11.90%, respectively.