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Entropy Generation and Heat Transfer Performance in Microchannel Cooling.
Jundika C Kurnia1, Desmond C Lim1, Lianjun Chen2
1Department of Mechanical Engineering, Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Perak Darul Ridzuan, Malaysia.
Entropy (Basel, Switzerland)
|December 3, 2020
Summary
This study explores liquid cooling channels with oblique fins, analyzing thermal performance using both laws of thermodynamics. Optimal fin angles enhance heat transfer, while higher flow rates reduce energy loss for better electronic cooling.
Area of Science:
- Thermal Engineering
- Fluid Dynamics
- Thermodynamics
Background:
- Liquid cooling is crucial for electronics due to its efficiency.
- Channel design significantly impacts heat sink performance.
- Traditional studies often focus solely on the first law of thermodynamics.
Purpose of the Study:
- Investigate flow behavior and heat transfer in oblique fin channels.
- Analyze performance based on both first and second laws of thermodynamics.
- Evaluate the effects of fin angle, Reynolds number, and heat flux.
Main Methods:
- Computational fluid dynamics (CFD) simulations.
- Analysis of incompressible fluid flow and heat transfer.
- Thermodynamic evaluation using first and second laws.
Main Results:
- The 20° oblique fin channel achieved the highest figure of merit, particularly at higher Reynolds numbers (250-1000).
- The 90° oblique fin channel exhibited the lowest entropy generation, though still higher than conventional parallel channels.
- Increased Reynolds number reduced entropy generation, while increased heat flux raised it.
Conclusions:
- Oblique fin geometry offers potential for enhanced electronic cooling.
- Fin angle critically influences thermal performance and thermodynamic efficiency.
- Balancing heat transfer and entropy generation is key for optimal channel design.
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