This article presents an experimental investigation of domestic refrigerator using R134a as working fluid with different concentration of Al₂O₃, TiO₂ nano particles and nano composite particles dispersed in polyolester (POE) oil lubricant. All the nano particles were added to the POE oil with 0.1gL⁻¹ volume concentration. The experiments are conducted for different compositions such as R134a with POE oil, R134a with nano lubricant (Al₂O₃/POE oil and TiO₂/POE oil) and R134a with nano composite lubricant (75% Al₂O₃/25% TiO₂/POE oil, 50% Al₂O₃/50% TiO₂/POE oil and 25% Al₂O₃/75% TiO₂/POE oil). Both second law analysis and performance analysis was conducted. Analysis was based on temperature and pressure readings measured from various sensors and gauges which is attched to the system. The test conducted at −18 °C temperature in evaporator with reference to 27 °C environment state. Findings show that best performance is given by R134a with nano composite lubricant 50% Al₂O₃/50% TiO₂/POE oil which results in lowest power consumption of 92.2 W, highest actual coefficient of performance of 2.33, lowest compressor work of 61.24 kJ/kg, lowest total irreversibility of the system of 36.19 kJ/kg and highest second law efficiency of the system of 40.9%. Thus, using this nano composite fluid mixture as lubricant in domestic refrigerator is suggested.

本文介绍了一种家用冰箱的实验研究，该冰箱使用R134a作为工作液，并在多元醇（POE）油润滑剂中分散了不同浓度的Al ₂ O ₃，TiO ₂纳米颗粒和纳米复合颗粒。将所有纳米颗粒以0.1gL ^-1体积浓度添加到POE油中。针对不同的成分进行了实验，例如R134a和POE油，R134a和纳米润滑剂（Al ₂ O ₃ / POE油和TiO ₂ / POE油）和R134a和纳米复合润滑剂（75％Al ₂ O ₃ /25％TiO）₂ / POE油，50％Al ₂ O ₃/ 50％TiO ₂ / POE油和25％Al ₂ O ₃ /75％TiO ₂ / POE油）。进行了第二定律分析和性能分析。分析基于从安装在系统上的各种传感器和压力表测得的温度和压力读数。该测试是在−18°C的温度下于蒸发器中根据27°C的环境状态进行的。研究结果表明，R134a与50％Al ₂ O ₃ /50％TiO ₂纳米复合润滑剂可提供最佳性能/ POE油，其最低功耗为92.2 W，最高实际性能系数为2.33，最低压缩机工作为61.24 kJ / kg，系统的总不可逆性最低，为36.19 kJ / kg，系统的第二定律效率最高。 40.9％。因此，建议在家用冰箱中使用这种纳米复合流体混合物作为润滑剂。