Hierarchical Structured Surfaces for Higher Heat Transfer Performance

Technology #15659

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Inventors
Professor Evelyn Wang
Department of Mechanical Engineering, MIT
External Link (meche.mit.edu)
Ryan Enright
Department of Mechanical Engineering, MIT
Kuang-Han Chu
Department of Mechanical Engineering, MIT
Managed By
Christopher Noble
MIT Technology Licensing Officer - Clean and Renewable Energy
Patent Protection

Hierarchical Structured Surfaces

US Patent Pending 2015-0375997
Publications
Structured surfaces for enhanced pool boiling heat transfer
Applied Physics Letters, Vol. 100, Issue 24, pg. 241603, 2012


Applications

This method is applicable to thermal energy conversion in power generation and high performance thermal management systems.

Problem Addressed

Methods to extend the critical heat flux (CHF), at which the nucleate pool boiling regime transitions to the film boiling regime, have been studied extensively owing to its significant practical importance in areas such as thermal energy conversion in power generation and high performance thermal management systems. Pool boiling on micro structured surfaces can demonstrate high critical heat flux (CHF) which can be modeled to predict CHF on structured surfaces

Technology

This invention is a method of extending the critical heat flux by increasing surface roughness of a surface having a plurality of microstructured features to enhance surface wettability, whereby the critical heat flux of the surface is increased by at least 150%. The hierarchically-structured surfaces are fabricated using electrophoretic deposition on microstructured silicon and electroplated. A thermal oxide layer is subsequently grown to enhance surface wettability.

Advantages

  • High performance boiling heat transfer
  • Enhanced critical heat flux