A comparative study of pool boiling heat transfer in different porous artery structures

Kai Zhang, Lizhan Bai, Haichuan Jin, Guiping Lin, Guice Yao, Dongsheng Wen

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A novel porous artery structure is proposed and experimentally validated to enhance the pool boiling heat transfer performance based on the concept of “phase separation and modulation”. In the experiment, multiple rectangular arteries are formed in the bottom of a porous structure, and a thin copper microporous layer is placed between the heating surface and the rectangular arteries. Compared with conventional porous structures, this novel porous artery structure can effectively improve the pool boiling heat transfer performance due to i) increased nucleation site density, ii) improved liquid replenishment by capillarity, and iii) effective liquid/vapor phase separation. Experimental results show that comparing with boiling heat transfer on a plain surface, a 200% higher in CHF, and a 144% higher in heat transfer coefficient (HTC), together with a 59% lower in superheat at the onset of nucleate boiling (ONB) are obtained for this new structure. In addition, the effects of the top and bottom microporous layer thickness and the artery depth on the pool boiling heat transfer performance are investigated, and the inherent physical mechanisms are analyzed.

Original languageEnglish
Article number117759
JournalApplied Thermal Engineering
Volume202
DOIs
StatePublished - 5 Feb 2022
Externally publishedYes

Keywords

  • Critical heat flux
  • Heat transfer coefficient
  • Phase separation
  • Pool boiling
  • Porous structure

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