Comparison of bubble parameters between boiling and hydrogen evolving systems

Hae Kyun Park; Bum Jin Chung

doi:10.1016/j.expthermflusci.2020.110316

Comparison of bubble parameters between boiling and hydrogen evolving systems

Hae Kyun Park, Bum Jin Chung

School of Energy Engineering

Kyung Hee University

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Bubble behavior in a hydrogen evolving system was compared to that under boiling conditions. Hydrogen was generated electrochemically in an aqueous solution of 1.5 M sulfuric acid (H₂SO₄). Hydrogen bubble parameters such as active nucleation site density, bubble departure diameter, and bubble frequency, were measured and compared to those observed during boiling. The hydrogen evolving system exhibited higher active nucleation site density that increased, and smaller departure diameters that gradually decreased, with increasing current density. Bubble growth time, which is related to bubble frequency, was shorter in the hydrogen evolving system due to smaller departure diameters. This study provides experimental evidence supporting the analogous relationship between bubble formation in boiling and that in hydrogen evolving systems.

Original language	English
Article number	110316
Journal	Experimental Thermal and Fluid Science
Volume	122
DOIs	https://doi.org/10.1016/j.expthermflusci.2020.110316
State	Published - 1 Apr 2021

Keywords

Active nucleation site density
Analogy
Boiling system
Bubble departure diameter
Bubble frequency
Hydrogen evolving system

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10.1016/j.expthermflusci.2020.110316

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title = "Comparison of bubble parameters between boiling and hydrogen evolving systems",

abstract = "Bubble behavior in a hydrogen evolving system was compared to that under boiling conditions. Hydrogen was generated electrochemically in an aqueous solution of 1.5 M sulfuric acid (H2SO4). Hydrogen bubble parameters such as active nucleation site density, bubble departure diameter, and bubble frequency, were measured and compared to those observed during boiling. The hydrogen evolving system exhibited higher active nucleation site density that increased, and smaller departure diameters that gradually decreased, with increasing current density. Bubble growth time, which is related to bubble frequency, was shorter in the hydrogen evolving system due to smaller departure diameters. This study provides experimental evidence supporting the analogous relationship between bubble formation in boiling and that in hydrogen evolving systems.",

keywords = "Active nucleation site density, Analogy, Boiling system, Bubble departure diameter, Bubble frequency, Hydrogen evolving system",

author = "Park, {Hae Kyun} and Chung, {Bum Jin}",

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AU - Chung, Bum Jin

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N2 - Bubble behavior in a hydrogen evolving system was compared to that under boiling conditions. Hydrogen was generated electrochemically in an aqueous solution of 1.5 M sulfuric acid (H2SO4). Hydrogen bubble parameters such as active nucleation site density, bubble departure diameter, and bubble frequency, were measured and compared to those observed during boiling. The hydrogen evolving system exhibited higher active nucleation site density that increased, and smaller departure diameters that gradually decreased, with increasing current density. Bubble growth time, which is related to bubble frequency, was shorter in the hydrogen evolving system due to smaller departure diameters. This study provides experimental evidence supporting the analogous relationship between bubble formation in boiling and that in hydrogen evolving systems.

AB - Bubble behavior in a hydrogen evolving system was compared to that under boiling conditions. Hydrogen was generated electrochemically in an aqueous solution of 1.5 M sulfuric acid (H2SO4). Hydrogen bubble parameters such as active nucleation site density, bubble departure diameter, and bubble frequency, were measured and compared to those observed during boiling. The hydrogen evolving system exhibited higher active nucleation site density that increased, and smaller departure diameters that gradually decreased, with increasing current density. Bubble growth time, which is related to bubble frequency, was shorter in the hydrogen evolving system due to smaller departure diameters. This study provides experimental evidence supporting the analogous relationship between bubble formation in boiling and that in hydrogen evolving systems.

KW - Active nucleation site density

KW - Analogy

KW - Boiling system

KW - Bubble departure diameter

KW - Bubble frequency

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VL - 122

JO - Experimental Thermal and Fluid Science

JF - Experimental Thermal and Fluid Science

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ER -

Comparison of bubble parameters between boiling and hydrogen evolving systems

Abstract

Keywords

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