Analysing Gas-Liquid Flow in PEM Electrolyser Micro-Channels

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

9 Citationer (Scopus)

Resumé

PEM water electrolysis is a key component for closing the loop of the renewable energy eco-system. In particular, these high response water electrolysers are suitable for fluctuating power sources. Conventional PEM water electrolysers are typically operated at a current density of around 1 A/cm2 and are fairly expensive. One means of increasing the hydrogen yield to cost ratio of such systems, is to increase the operating current density. However, at high current densities, management of heat and mass transfer in the anode current collector and channel becomes crucial. This entails that further understanding of the gas-liquid flow in both the porous media and the channel is necessary for insuring proper oxygen, water and heat management of the electrolysis cell. In this work, the patterns of vertical upward gas-liquid flow in a 5×1×94 mm micro-channel are experimentally analysed. A sheet of titanium felt is used as a permeable wall for permeation of air through a column of water similar to the phenomenon encountered at the anode. The transparent setup is operated ex-situ and the gas-liquid flow regimes are identified using a camera.
OriginalsprogEngelsk
TidsskriftECS Transactions
Vol/bind75
Udgave nummer14
Sider (fra-til)1121-1127
Antal sider7
ISSN1938-6737
DOI
StatusUdgivet - sep. 2016

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Liquids
Gases
Current density
Water
Electrolysis
Anodes
Permeation
Porous materials
Mass transfer
Titanium
Cameras
Heat transfer
Hydrogen
Oxygen
Air
Costs
Hot Temperature

Citer dette

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title = "Analysing Gas-Liquid Flow in PEM Electrolyser Micro-Channels",
abstract = "PEM water electrolysis is a key component for closing the loop of the renewable energy eco-system. In particular, these high response water electrolysers are suitable for fluctuating power sources. Conventional PEM water electrolysers are typically operated at a current density of around 1 A/cm2 and are fairly expensive. One means of increasing the hydrogen yield to cost ratio of such systems, is to increase the operating current density. However, at high current densities, management of heat and mass transfer in the anode current collector and channel becomes crucial. This entails that further understanding of the gas-liquid flow in both the porous media and the channel is necessary for insuring proper oxygen, water and heat management of the electrolysis cell. In this work, the patterns of vertical upward gas-liquid flow in a 5×1×94 mm micro-channel are experimentally analysed. A sheet of titanium felt is used as a permeable wall for permeation of air through a column of water similar to the phenomenon encountered at the anode. The transparent setup is operated ex-situ and the gas-liquid flow regimes are identified using a camera.",
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Analysing Gas-Liquid Flow in PEM Electrolyser Micro-Channels. / Lafmejani, Saeed Sadeghi; Olesen, Anders Christian; Kær, Søren Knudsen.

I: ECS Transactions, Bind 75, Nr. 14, 09.2016, s. 1121-1127.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Analysing Gas-Liquid Flow in PEM Electrolyser Micro-Channels

AU - Lafmejani, Saeed Sadeghi

AU - Olesen, Anders Christian

AU - Kær, Søren Knudsen

PY - 2016/9

Y1 - 2016/9

N2 - PEM water electrolysis is a key component for closing the loop of the renewable energy eco-system. In particular, these high response water electrolysers are suitable for fluctuating power sources. Conventional PEM water electrolysers are typically operated at a current density of around 1 A/cm2 and are fairly expensive. One means of increasing the hydrogen yield to cost ratio of such systems, is to increase the operating current density. However, at high current densities, management of heat and mass transfer in the anode current collector and channel becomes crucial. This entails that further understanding of the gas-liquid flow in both the porous media and the channel is necessary for insuring proper oxygen, water and heat management of the electrolysis cell. In this work, the patterns of vertical upward gas-liquid flow in a 5×1×94 mm micro-channel are experimentally analysed. A sheet of titanium felt is used as a permeable wall for permeation of air through a column of water similar to the phenomenon encountered at the anode. The transparent setup is operated ex-situ and the gas-liquid flow regimes are identified using a camera.

AB - PEM water electrolysis is a key component for closing the loop of the renewable energy eco-system. In particular, these high response water electrolysers are suitable for fluctuating power sources. Conventional PEM water electrolysers are typically operated at a current density of around 1 A/cm2 and are fairly expensive. One means of increasing the hydrogen yield to cost ratio of such systems, is to increase the operating current density. However, at high current densities, management of heat and mass transfer in the anode current collector and channel becomes crucial. This entails that further understanding of the gas-liquid flow in both the porous media and the channel is necessary for insuring proper oxygen, water and heat management of the electrolysis cell. In this work, the patterns of vertical upward gas-liquid flow in a 5×1×94 mm micro-channel are experimentally analysed. A sheet of titanium felt is used as a permeable wall for permeation of air through a column of water similar to the phenomenon encountered at the anode. The transparent setup is operated ex-situ and the gas-liquid flow regimes are identified using a camera.

U2 - 10.1149/07514.1121ecst

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