Visualization of pool boiling on plain micro-fins and micro- fins with sintered perforated foil

7th European Thermal-Sciences Conference

Pastuszko, R.^1 ; Kaniowski, R.^1

Kielce University of Technology, Kielce, Poland^1

关键词: Boiling heat transfer;    Enhanced surface;    Micro fins;    Nucleation sites;    Pool boiling;    Pool boiling mechanism;    Porous structures;    Saturated water;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032137/pdf
DOI  :  10.1088/1742-6596/745/3/032137

来源: IOP

【 摘 要 】

The paper presents visualization investigations of boiling heat transfer over enhanced structures. The experiments were carried out for two kinds of enhanced surfaces: an array of 0.5 mm high micro-fins without covering (plain micro-fins designated as MF) and the surfaces made by sintering micro-fin tops with the copper perforated foil (MF+F). Pool boiling data at atmospheric pressure were obtained for saturated water, ethanol, FC-72 and Novec-649. Visualization studies aimed at identifying nucleation sites and determining the diameter and frequency of departing bubbles. Different pool boiling mechanisms were observed for the plain micro-fins and micro-fins covered with the porous structure.