Heat transfer coefficient

Critical heat flux

Heat transfer

Materials science

Convective heat transfer

Heat transfer enhancement

Dynamic scraped surface heat exchanger

Acetone

Heat exchanger

Plate heat exchanger

Thermodynamics

Physics

Organic chemistry

Composite material

Heat sink

Nanofluid

Chemistry

Mechanics

Micro heat exchanger

International Journal of Heat and Mass Transfer

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.

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