Heat transfer evaluation of a micro heat exchanger cooling with spherical carbon-acetone nanofluid

• Published in: International journal of heat and mass transfer 2020-03, Vol.149, p.119124, Article 119124
• Main Authors: Li, Z.X., Khaled, Usama, Al-Rashed, Abdullah A.A.A., Goodarzi, Marjan, Sarafraz, M.M., Meer, Rashed
• Format: Article
• Language: English
• Subjects: Acetone; Brownian motion; Carbon; Carbon nanoparticles; Convective heat transfer; Cooling effects; Flow characteristics; Fluid dynamics; Fluid flow; Fluid friction; Friction factor; Heat exchangers; Heat sinks; Heat transfer; Heat transfer coefficients; Microchannel; Microchannels; Morphology; Nanofluids; Nanoparticles; Pressure drop; Promotion; Thermal boundary layer; Thermophoresis; Viscous forces
• ISSN: 0017-9310; 1879-2189
• DOI: 10.1016/j.ijheatmasstransfer.2019.119124

•Convection of a micro-channel heat sink cooling with carbon-acetone nanofluid studied experimentally.•Heat transfer coefficient, friction factor, pressure drop value, and the thermo-hydraulic performance was quantified.•The structure and morphology of the nanoparticles (NPs) were characterized.•The value of PD was augmented by 18.3% at Reynolds number of 1400 at wt.% = 0.1.•The THP value was increased by 76% despite an increase in the PD of the system. In this article, we experimentally measured the convective heat transfer of a micro-channel heat sink cooling with carbon-acetone nanofluid (NF), which potentially is a cost-effective nano-suspension with plausible heat transfer characteristics. The heat transfer and fluid flow characteristics including heat transfer coefficient (HTC), friction factor (FF), pressure drop value (PD), and the thermo-hydraulic performance (THP) was quantified. The structure and morphology of the nanoparticles (NPs) were characterised. It was found that carbon-acetone NF can enhance the HTC value by ~73%. Also, a small increase in the FF and PD values were reported due to the augmentation of particle-fluid friction forces and viscosity. The value of PD was augmented by 18.3% at Re~1400 at wt.% = 0.1. The THP value was increased by 69% despite an increase in the PD of the system. It was identified that the promotion of heat transfer was due to the micro-scale phenomena such as Brownian motion and thermophoresis. Also, reduction in the thermal boundary layer inside the micro-channel further contributed to the promotion of heat transfer within the micro-channel.