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Performance of a domestic refrigerator using selected hydrocarbon working fluids and TiO2–MO nanolubricant

Jatinder, Gill and Ohunakin, O.S. and Adelekan, Damola and Atiba, Opemipo E. and Daniel, Ajulibe B. and Singh, Jagdev and Atayero, A. A. (2019) Performance of a domestic refrigerator using selected hydrocarbon working fluids and TiO2–MO nanolubricant. Applied Thermal Engineering.

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In this work, the steady state energetic performance of selected mass charges (40, 60 and 80 g) of R600a refrigerant and varying concentrations of TiO2 based nano-lubricant (0, 0.2, 0.4 and 0.6 g/L) within a domestic refrigerator was investigated and compared with the performance of a domestic refrigerator using LPG refrigerant from authors’ previous publication. Additionally, the effect of the TiO2 concentrations on the thermophysical properties of the nano-lubricants under similar conditions was investigated. The results reported compressor discharge temperature, compressor power consumption and pull-down time within the R600a-based refrigerator were lower by about 41.92%, 33.33% and 21.05% respectively compared to the LPG-based refrigerator. Moreover, refrigeration capacity and COP of the R600-based refrigerator were higher when compared to LPG-based refrigerator, by about 17.39% and 62.54% respectively. Overall, energetic performance of the R600a-based domestic refrigerator was better than that of baseline (LPG) at optimal concentration of 0.2 g/L of TiO2 and 40 g charge of R600a refrigerant, under similar operating conditions.

Item Type: Article
Uncontrolled Keywords: TiO2 R600a Domestic refrigerator Nano lubricant COP Refrigeration capacity Thermo-physical properties
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 16 Apr 2021 12:52
Last Modified: 16 Apr 2021 12:52

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