Full solid-state magnetic refrigeration device toward thermal management.

Area of Science:

• Materials Science
• Thermodynamics
• Solid-State Physics

Background:

• Increasing demand for effective electronics thermal management driven by information technology advancements.
• Limitations of current cooling technologies: low convective heat-transfer coefficients in gases and inefficiencies/environmental concerns with vapor compression systems.
• Need for efficient, point-to-point cooling solutions for microchips.

Purpose of the Study:

• To develop a scalable, simple-structure, full solid-state magnetic refrigeration device.
• To achieve active point-to-point thermal management for electronic components.
• To utilize hybrid regeneration with solid heat transfer materials for enhanced cooling.

Main Methods:

• Design and construction of a full solid-state magnetic refrigeration device.
• Implementation of a hybrid regeneration cycle using solid heat transfer materials.
• Experimental testing of the device's thermal management capabilities, including heat-transfer coefficient and cooling power measurements.

Main Results:

• Achieved a high heat-transfer coefficient (h) of 336 W m⁻² K⁻¹, significantly exceeding typical forced air convection (<100 W m⁻² K⁻¹).
• Demonstrated a high unit cascade heat-transfer coefficient (h/n) of 168 W m⁻² K⁻¹.
• Obtained a large area cooling power (W) of 0.72 W cm⁻² at a temperature difference of -20 K.

Conclusions:

• The developed solid-state magnetic refrigeration device offers superior thermal management performance.
• The design's scalability and simple structure make it a promising alternative to existing cooling technologies.
• This technology represents a significant advancement in solid-state caloric cooling for electronics.