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Related Concept Videos

Single Pipe Systems01:24

Single Pipe Systems

140
In pipe flow analysis, problems are typically categorized into three types — Type I, Type II, and Type III — based on the known parameters and the desired outcome. Each type of problem addresses specific engineering requirements using fluid properties, pipe characteristics, and operational conditions.
In a Type I problem, fluid properties (density and viscosity), pipe characteristics (including diameter, length, and surface roughness), and the flow rate or average velocity are...
140

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Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow
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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
PubMed
Summary
This summary is machine-generated.

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.

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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.