International Scientific Journal


Compression of vaporized refrigerant is the essential process of the refrigeration cycle which is performed by using a compressor. The amount of power consumed by a refrigeration system is governed by the work input given to its compressor, which also determines the COP of the system. By reducing the work input given to the compressor, the power consumption of refrigerator is reduced along with the improvement in its COP. Nowadays, nanoparticles have emerged as the new generation additives in various working fluids because of their remarkable ability to improve the heat transfer, tribological and other thermophysical properties of the base fluid. In such a vein, we propose a compressor oil based nanofluid prepared by dispersing nanoparticles into the conventional compressor oil. In the present study, four samples of nanoadditive compressor oil were prepared by dispersing the nanoparticles like Al2O3, TiO2, and ZnO into the conventional mineral oil as a lubricant. The tribological properties of this four samples were studied, out of which one sample gave a better lubrication and heat transfer properties which are considered as one of the key parameters for reducing work input to the compressor, this can result in reduced power consumption, with enhancement of COP. These results are analyzed experimentally by carrying out performance and exergy analysis in a vapor compression refrigeration system, using R600a as a refrigerant. The experimental results show that, there is an improvement of COP by 14.61% and exergy efficiency by 7.51%. Also, the efficiency defect in the major components of vapor compression refrigeration system has been reduced effectively.
PAPER REVISED: 2019-01-03
PAPER ACCEPTED: 2019-01-04
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  1. Bolaji, B. O., & Huan, Z., Ozone depletion and global warming: Case for the use of natural refrigerant-a review. Renewable and Sustainable Energy Reviews, (2013) 18, 49-54.
  2. Bhatkar, V. W., et al., Alternative refrigerants in vapour compression refrigeration cycle for sustainable environment: a review of recent research. International Journal of Environmental Science and Technology, (2013), 10(4), 871-880.
  3. Palm, B., Hydrocarbons as refrigerants in small heat pump and refrigeration systems-a review. International journal of refrigeration, (2008), 31(4), 552-563.
  4. Corberan, J. M., et al., Review of standards for the use of hydrocarbon refrigerants in A/C, heat pump and refrigeration equipment. International Journal of refrigeration, (2008), 31(4), 748-756.
  5. Miyara, A., et al., Ways of next generation refrigerants and heat pump/refrigeration systems. International Journal of refrigeration, (2010), 18(1), 1-5.
  6. Shecco, Natural refrigerants market growth for Europe, 2012.
  7. Jiang, W., et al., Measurement and model on thermal conductivities of carbon nanotube nanorefrigerants. International Journal of Thermal Sciences, (2009), 48(6), 1108-1115.
  8. Jiang, W., et al., Experimental and model research on nanorefrigerant thermal conductivity. HVAC&R Research, (2009), 15(3), 651-669.
  9. Wang, K. J., et al., Nano-scale thermal transporting and its use in engineering. In Proceedings of the 4th Symposium on Refrigeration and Air Conditioning Southeast University Press, Nanjing, China, (2006), pp. 66-75.
  10. Xiao-Min, W. U., et al., Investigation of pool boiling heat transfer of R11 with TiO2 nanoparticle. Journal of EngineeringThermophysics, 28 (2008), 124-126.
  11. Park, K. J., & Jung, D., Boiling heat transfer enhancement with carbon nanotubes for refrigerants used in building air-conditioning. Energy and Buildings, (2007), 39(9), 1061-1064.
  12. Peng, H., et al., Heat transfer characteristics of refrigerant-based nanofluid flow boiling inside a horizontal smooth tube. International Journal of Refrigeration, (2009), 32(6), 1259-1270.
  13. Peng, H., et al., Measurement and correlation of frictional pressure drop of refrigerant-based nanofluid flow boiling inside a horizontal smooth tube. International Journal of Refrigeration, (2009), 32(7), 1756-1764.
  14. Bi, S., et al., Performance of a domestic refrigerator using TiO2-R600a nano-refrigerant as working fluid. Energy Conversion and Management, (2011), 52(1), 733-737.
  15. Kumar, D. S., &Elansezhian, R., ZnOnanorefrigerant in R152a refrigeration system for energy conservation and green environment. Frontiers of Mechanical Engineering, (2014), 9(1), 75-80.
  16. Singh, K., &Lal, K., An investigation into the performance of a nanorefrigerant (R134a+ Al2O3) based refrigeration system. IJRMET, (2014), 4(2), 158-162.
  17. Lee, K., et al., Performance evaluation of nano-lubricants of fullerene nanoparticles in refrigeration mineral oil. Current Applied Physics, (2009), 9(2), e128-e131.
  18. Jwo, C. S., et al., Effects of nanolubricant on performance of hydrocarbon refrigerant system. Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena, (2009), 27(3), 1473-1477.
  19. Subramani, N., & Prakash, M. J., Experimental studies on a vapour compression system using nanorefrigerants. International Journal of Engineering, Science and Technology, (2011), 3(9), 95-102.
  20. Kumar, D. S., & Elansezhian, R., Experimental study on Al2O3-R134a nanorefrigerant in refrigeration system. International Journal of Modern Engineering Research, (2012), 2(5), 3927-3929.
  21. Omer A.Alawi.,et al.,Applications of nanorefrigerant and nanolubricants in refrigeration, air-conditioning and heat pump systems: A review. International Communications in Heat and Mass Transfer, (2015) 68, 91-97.
  22. Subramani, N., et al., Performance studies on a vapour compression refrigeration system using nano-lubricant. Int. J. Innov. Res. Sci. Eng. Technol, (2013), 2(1), 522-530.
  23. Hayness WM (2015). CRC Handbook of chemistry and physics (96thed). Boca Raton, FL CRC Press. ISBN 978-1-4822-6096-0.
  24. IS 1476 (part-1) Schedule-5 Direct cool Refrigerator, Bureau of Energy Efficiency.
  25. SeokPilJanga and Stephen U.S.Choib., Role of Brownian motion in the enhanced thermal conductivity of nanofluids. Applied Physics Letters volume 84, NUMBER 21, 24 May 2004.
  26. Li Chang and Klaus Friedrich., Enhancement effect of nanoparticles on the sliding wear of short fiber-reinforced polymer composites, (2010), 43, 2355-2364.
  27. Giri Prasad, M.J., et al.,Investigation of Stability of Water Based Mwcnts Nanofluids and Size Distribution of MWCNTS Functionalised by Different Chemical Treatment Processes. Applied Mechanics and Materials, (2015), 852, 712-718.
  28. RecepYumrutus., et al.,Exergy analysis of vapour compression refrigeration systems. Exergy, an International Journal, (2002) 2, 266-272.
  29. Jatinder Gill., et al., Energetic and Exergetic Analysis of a Domestic Refrigerator System with LPG as a replacement for R134a refrigerant, using POE lubricant and Mineral oil based TiO2-, SiO2- and Al2O3-lubricants. International journal of refrigeration, (2018), doi: 10.1016/j.ijrefrig.2018.05.010.
  30. Jatinder Gill., et al., Exergy analysis of vapor compression refrigeration system using R450A as a replacement of R134a. Journal of Thermal Analysis and Calorimetry, (2018), htts://
  31. R. Saravana Kumar and V. Selladurai., Exergy analysis of a domestic refrigerator using eco-friendly R290/R600a refrigerant mixture as an alternative to R134a. Journal of Thermal Analysis and Calorimetry, (2014), 115(1), 933-940.
  32. Fang WANG., et al., Energy and Exergy analysis of heat pump using R744/R32 refrigerant mixture. Thermal Science, (2014), 18(5), 1649-1654.
  33. Gill, J., & Singh, J., Energetic and exergetic performance analysis of the vapour compression refrigeration system using adaptive neuro-fuzzy inference system approach. Exp Thermal Fluid Sci, (2017), 88, 246-260.
  34. Jatinder Gill., et al., Component - wise exergy analysis using adaptive neuro - fuzzy inference system in vapour compression refrigeration system. Journal of Thermal Analysis and calorimetry, (2018), htts://

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