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An Ultralight Capillary-Driven Heat Pipe
Yong Ju Lee1, Yi Xiang Wang1, Yoon Chang Jeong1
1School of Mechanical Engineering, Chonnam National University, Gwangju 61186, South Korea.
Langmuir : the ACS Journal of Surfaces and Colloids
|April 8, 2024
Summary
We developed ultralight heat pipes (uHPs) for mobile electronics cooling, achieving a 73% weight reduction. These advanced heat pipes offer superior thermal performance and reduced evaporator temperatures.
Area of Science:
- Materials Science
- Thermal Engineering
- Nanotechnology
Background:
- Capillary-driven heat pipes are crucial for compact electronic cooling.
- Existing heat pipes often lack lightweighting for mobile applications.
Purpose of the Study:
- To develop ultralight heat pipes (uHPs) for mobile applications.
- To achieve significant weight reduction while maintaining thermal performance.
Main Methods:
- Fabrication of ultrathin (∼40 μm) electroless-plated envelopes.
- Electroless plating of a 100-μm-thick microporous wick structure.
- Superhydrophilization of the wick via blackening and nanotexture formation.
Main Results:
- Achieved an average 73% weight reduction compared to commercial counterparts (∼2.7 g vs. ∼10.0 g).
- Maintained equivalent heat spreading capabilities.
- Operated at a 25% lower evaporator temperature due to enhanced heat rejection.
Conclusions:
- The developed uHPs offer a highly effective solution for lightweight electronic cooling.
- The novel fabrication and surface treatment enhance thermal performance and reduce weight.
- This technology is suitable for weight-sensitive mobile applications.
