Enhancement of phase change heat transfer by using surface energy patterning techniques

Tzong Shyng Leu, Hung Wen Lin, Tseng Hsin Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

Using phase change of working fluid to remove heat in a heat exchanger device is a high efficiency method. When superheated vapor passes over a sub-cooled substrate, water droplets nucleate and grow by coalescence with the surrounding drops. The merging droplets exhibit two-dimensional random motion somewhat like the Brownian movements of colloidal particles. If surface energy patterns are designed on the substrate surface, the random condensing droplets will nucleate and grow to a certain size and move toward the more hydrophilic side of the surface. Powered by this forces, condenser surface will not grow into film-wise condensation situation. Thus condensation speeds are faster than those of typical surfaces without any surface modification. This effect has implications for passively enhancing heat transfer in heat exchangers or heat pipes.

Original languageEnglish
Title of host publicationProceedings of 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS
Pages994-998
Number of pages5
DOIs
Publication statusPublished - 2006 Dec 1
Event1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS - Zhuhai, China
Duration: 2006 Jan 182006 Jan 21

Publication series

NameProceedings of 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS

Other

Other1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS
CountryChina
CityZhuhai
Period06-01-1806-01-21

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Materials Science (miscellaneous)

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  • Cite this

    Leu, T. S., Lin, H. W., & Wu, T. H. (2006). Enhancement of phase change heat transfer by using surface energy patterning techniques. In Proceedings of 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS (pp. 994-998). [4135114] (Proceedings of 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS). https://doi.org/10.1109/NEMS.2006.334597