Effect of Biomaterial (Citrullus Lanatus Peels) Nanolubricant on the Thermal Performance and Energy Consumption of R600a in Refrigeration System

  • Oluseyi O. AjayiEmail author
  • Caleb C. Aba-Onukaogu
  • Enesi Y. Salawu
  • F. T. Owoeye
  • D. K. Akinlabu
  • A. P. I. Popoola
  • S. A. Afolalu
  • A. A. Abioye
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


The study experimentally investigated the combinatorial impact of bio-based nanoparticles from agriculture waste of Citrullus Lanatus (watermelon) peels on the improvement of thermal performance and energy consumption of R600a as an alternative refrigerant to environment malignant R134a in a domestic refrigeration system. The thermodynamic system includes Copeland 46B/R600a or R134a as control and bio-based nanolubricant/R600a at different concentrations as test samples. The outcome showed that despite the results of coefficient of performance and pull-down time for the conventional R134a refrigerant fluid system, the R600a and its nanorefrigerant fluid variants performed better in terms of energy consumption, cooling capacity, and quantity of heat absorbed and expelled. Thus, reconfiguration of the thermodynamic system with bio-based nanoparticles had effect on the performance and improvement of R600a as a worthy refrigerant alternative to R134a.


Thermal system Energy system Nanolubricant Nanorefrigerant Power consumption Energy savings 



The authors wish to appreciate the management of Covenant University for the part sponsorship of this research and Tshwane University of Technology for the platform provided towards the completion of this research.


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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Oluseyi O. Ajayi
    • 1
    • 4
    Email author
  • Caleb C. Aba-Onukaogu
    • 1
  • Enesi Y. Salawu
    • 1
  • F. T. Owoeye
    • 2
  • D. K. Akinlabu
    • 3
  • A. P. I. Popoola
    • 4
  • S. A. Afolalu
    • 1
  • A. A. Abioye
    • 1
  1. 1.Department of Mechanical EngineeringCovenant UniversityOtaNigeria
  2. 2.Department of Industrial ChemistryCovenant UniversityOtaNigeria
  3. 3.Department of Biological SciencesCovenant UniversityOtaNigeria
  4. 4.Department of Chemical, Metallurgical and Materials EngineeringTshwane University of TechnologyPretoriaSouth Africa

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