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Heat Transfer Enhancement Using Al2O3-MWCNT Hybrid-Nanofluid inside a Tube/Shell Heat Exchanger with Different Tube
Maissa Bouselsal1, Fateh Mebarek-Oudina1,2, Nirmalendu Biswas3
1Department of Physics, Faculty of Sciences, University of 20 Août 1955-Skikda, Skikda 21000, Algeria.
Micromachines
|May 27, 2023
Summary
Researchers enhanced heat exchanger efficiency using diamond-shaped tubes and Al2O3-MWCNT hybrid nanofluid. This novel approach significantly boosts heat transfer rates while minimizing entropy generation for industrial applications.
Area of Science:
- Thermodynamics and Heat Transfer
- Materials Science and Engineering
Background:
- Compact heat exchangers are in high demand, necessitating cost-effective, energy-efficient designs.
- Conventional heat exchangers face limitations in performance and size.
Purpose of the Study:
- To improve tube/shell heat exchanger efficiency through geometric modifications and advanced heat transfer fluids.
- To investigate the impact of hybrid nanofluids and tube shapes on thermal performance.
Main Methods:
- Numerical simulation using a finite-element-based tool to solve transport equations.
- Utilizing water-based Al2O3-MWCNT hybrid nanofluid as the heat transfer fluid.
- Analyzing performance across various nanoparticle concentrations (0.01-0.04) and Reynolds numbers (2400-2700) for different tube shapes.
Main Results:
- Heat transfer rate increases with nanoparticle concentration and fluid velocity.
- Diamond-shaped tubes demonstrate superior heat transfer capabilities compared to other shapes.
- Hybrid nanofluid inclusion enhances heat transfer up to 103.07% at 2% particle concentration.
- Diamond-shaped tubes minimize entropy generation.
Conclusions:
- Geometric optimization of tubes and the use of hybrid nanofluids are effective strategies for enhancing heat exchanger efficiency.
- Diamond-shaped tubes combined with Al2O3-MWCNT hybrid nanofluid offer significant improvements in heat transfer and reduced energy loss.
- The findings have substantial implications for industrial heat transfer applications.
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