Transient pulse condensation

Date

2020-08-01

Author

Sett, Soumyadip
Sokalski, Peter
Mehta, Manan
Rabbi, Kazi Fazle
Günay, Ahmet Alperen
Miljkovic, Nenad

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Transient convective droplet removal from condenser surfaces has the potential to significantly enhance thermal transport. Despite a century of progress in understanding of steady-state condensation, less is known about transient condensation. Here, we study transient pulse condensation of ethanol vapor. Using rigorous two-phase heat transfer measurements, we characterize transient heat transfer performance for filmwise and dropwise condensation of ethanol on smooth copper and nanostructured copper oxide lubricant-infused surfaces, respectively. We demonstrate an 8X and 5X enhancement in the condensation heat transfer coefficient during transient operation for dropwise and filmwise modes, respectively, when compared to the steady state. Beyond transient heat transfer enhancement, repeated cycles or pulses of dropwise condensation led to 30% higher time-averaged heat transfer performance due to higher nucleation site density and convective effects. Our work not only demonstrates transient condensation as a method to enhance heat transfer but also develops a methodology for enabling enhanced condensers for high power density thermal management systems for applications employing transient energy dissipation.

URI

https://hdl.handle.net/11511/92872

Journal

APPLIED PHYSICS LETTERS

DOI

https://doi.org/10.1063/5.0015311

Collections

Department of Mechanical Engineering, Article

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Citation Formats

S. Sett, P. Sokalski, M. Mehta, K. F. Rabbi, A. A. Günay, and N. Miljkovic, “Transient pulse condensation,” APPLIED PHYSICS LETTERS, vol. 117, no. 9, pp. 0–0, 2020, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/92872.