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The utilization of nanolubricants in the thermal system has shown significant efficiency and improvement in the last decade. In current research work, reduced graphene oxide (rGO)-based nanolubricant is utilized to enhance the efficiency of vapor compression refrigeration system. R134a is used as the refrigerant and mineral oil is utilized as base fluid in the experimentation. The two concentrations of rGO is synthesized, i.e., 0.02 wt% and 0.04 wt% using two-step method. The experimental results obtained from utilizing nanolubricant were further than the conventional refrigeration system in terms of coefficient of performance and power consumption. The experimentation result showed that the concentration of 0.04 wt% rGO is found to be the most effective, resulting in a 14.58% increment in the coefficient of performance, a 28% lessening in power consumption, and a 14.44% decrease in pull- down time.

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Experimental Investigation Using R134a—Reduced Graphene Oxide—MO-Based Nanosuspension in Vapor Compression Refrigeration

  • 会议论文

  • 发表日期：

    2026年

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  • Yogesh G. Joshi,
  • Harish Bhatkulkar

摘要

The utilization of nanolubricants in the thermal system has shown significant efficiency and improvement in the last decade. In current research work, reduced graphene oxide (rGO)-based nanolubricant is utilized to enhance the efficiency of vapor compression refrigeration system. R134a is used as the refrigerant and mineral oil is utilized as base fluid in the experimentation. The two concentrations of rGO is synthesized, i.e., 0.02 wt% and 0.04 wt% using two-step method. The experimental results obtained from utilizing nanolubricant were further than the conventional refrigeration system in terms of coefficient of performance and power consumption. The experimentation result showed that the concentration of 0.04 wt% rGO is found to be the most effective, resulting in a 14.58% increment in the coefficient of performance, a 28% lessening in power consumption, and a 14.44% decrease in pull- down time.