Effect of CuO nanolubricant on compressor characteristics and performance of LPG based refrigeration cycle: experimental investigation
Refrigeration, Ventilation and Air Conditioning system is the largest reason behind the increasing demand of energy consumption in the world and saving that energy through some innovative methods becomes a large issue for the researchers. Compressor is a primary component of the refrigeration cycle. The application of nanoparticles in refrigeration cycle overcomes the energy consumption issue by improving the compressor suction and discharge characteristics. In this paper, an experimental study is carried out to investigate the effect of copper oxide (CuO) nanoparticles on different parameters of the refrigeration cycle. CuO particles are appended with the system refrigerant through lubricating oil of the compressor. Further, the viscosity measurements and friction coefficient analysis of compressor lubricant for different fractions of nanoparticles has been investigated. The results showed that both the suction and discharge characteristics of the compressor were enhanced with the utilization of nanolubricant in LPG based refrigeration cycle. Nanoparticles additive in lubricant increases the viscosity which lead to a significant decrease in friction coefficient. The COP of the cycle was improved by 46%, as the energy consumption of the compressor was decreased by 7%.
Mass of water (kg)
Specific heat kJ kg−1 K−1
Energy meter constant.
Number of pulses taken in energy meter
Heat transfer coefficient
Coefficient of performance
Compliance with ethical standards
Conflict of interest
The research paper has no conflict of interest.
- 1.Elcock D (2007) Potential impacts of nanotechnology on energy transmission applications and need. ANL/EVS/TM/08-3, Argonne National Laboratory (ANL)Google Scholar
- 2.Wang RX, Hao B, Xie GZ, Li HQ (2003) A refrigerating system using R134a and mineral oil appended with n-TiO2 (R) as working fluids. Proceedings of the 4th international symposium on HAVC, Tsinghua University Press, Beijing, China, pp 888-892Google Scholar
- 5.Wang KJ, Ding GI, Jiang WT (2006) Nanoscale thermal transporting and its use in engineering. Proceedings of the 4th symposium on refrigeration and air condition. Southest University Press, Nanjing, China, pp 66-75Google Scholar
- 6.Wu X-M, Peng LI, Hui LI, Wang W-C (2008) Investigation of pool boiling heat transfer of R11 with TiO2 nanoparticles. J Eng Thermophys 28:124–126Google Scholar
- 13.Abbas M, Walvekar R, Hajibeigy M, Javadi F (2013) Efficient air—condition unit by using nano—refrigerant. In 1st Engineering undergraduate research catalyst conference, Selangor Darul, Malaysia, 1-2 July 2013Google Scholar
- 14.Hussen H (2016) Experimental investigation for titanium oxide nanoparticles as a lubricant additive for a compressor of window type air conditioner system. Journal of. Engineering 20(2):62–72Google Scholar
- 15.Kumar R, Singh J (2016) Effect of ZnO nanoparticles in R290/R600a based vapour compression refrigeration system added via lubricant oil on compressor suction and discharge charateristics. Heat Mass Transf. https://doi.org/10.1007/s00231-016-1921-3