Synergistic Thermal Enhancement of Embedded Micro-Pyramid Array and Advanced Nanofluids for High Heat Dissipation.

Area of Science:

• Electronics Engineering
• Materials Science
• Heat Transfer

Background:

• Active Phased Array Radar systems face thermal management challenges due to increasing power density.
• Traditional cold plates present thermal resistance issues for Transmitter and Receiver (T/R) modules.
• Effective thermal management is crucial for optimizing radar performance.

Purpose of the Study:

• To investigate an innovative embedded cooling strategy using micro-pyramid arrays and advanced nanofluids.
• To evaluate the thermal performance enhancement for high-density electronic systems.
• To provide guidance for future thermal management designs.

Main Methods:

• Thermal performance was assessed using maximum temperature, maximum temperature difference, and surface temperature standard deviation (ST).
• Micro-pyramid arrays with varying densities were fabricated and tested.
• Comparative analysis of different nanofluids (Al2O3, CuO, graphene, h-BN) was conducted.

Main Results:

• Higher micro-pyramid density significantly improved temperature uniformity, scaling with power load.
• The 8-circle micro-pyramid configuration reduced maximum temperature by 22.58 K and improved uniformity by 22.5% compared to the 2-circle structure at 100 W.
• Graphene nanofluid demonstrated superior heat transfer enhancement, with a synergistic effect with the 8-circle array yielding a 35.38% improvement in temperature uniformity at 100 W.

Conclusions:

• The combination of dense micro-pyramid arrays and graphene nanofluid offers a highly effective solution for thermal management in high-power electronic systems.
• The study highlights the potential of embedded cooling strategies for overcoming limitations of traditional cold plates.
• Findings offer critical insights for designing advanced thermal management systems for radar and other integrated electronics.