Analysing Gas-Liquid Flow in PEM Electrolyser Micro-Channels Using a Micro-Porous Ceramic as Gas Permeable Wall

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Resumé

The modern civilization is working based on a secure, sustainable, and economic energy. With the increasing share of renewable energies like solar and wind power, the secure and sustainable energy production will go under threat due to highly fluctuating electricity generated from these energy sources. An opportunity is to store energy as a means of energy surplus absorption. Polymer Electrolyte Membrane Electrolysis Cell (PEMEC) as a method of long term (more than an hour) energy storage, converts the unstable generated electricity to hydrogen. It is a key technology for closing the renewable energy economical system loop. It converts water to oxygen and high pressure hydrogen using electricity with a fast response rate that suits to damp grid fluctuations. One of the issues within these electrolysers is their high cost. One means of the cost reduction is to increase production from the existing cell by increasing its current density from 1 (A/cm2) (at the existing conventional cells) to 5 (A/cm2). At high current densities, due to high rate of oxygen generation and concentrated heat generation in the cell, issues related to heat and gas management come up which must be managed. In this study, an experimental setup is made of plexiglass, Titanium-felt (Ti-felt) and nano-porous ceramic. The setup demonstrates a similar gas-liquid flow encounters in PEM water electrolysis micro-channels and anode porous media. The nano-porous ceramic plate simulates small bubbles generation on the real membrane electrode assembly (MEA) surface. The movement of gas-liquid flow upward in the micro-channel at several water stoichiometric numbers are analysed and compared with a transparent PEMEC.
OriginalsprogEngelsk
TidsskriftECS Transactions
Vol/bind80
Udgave nummer8
Sider (fra-til)1107-1115
Antal sider9
ISSN1938-6737
DOI
StatusUdgivet - 2017
Begivenhed232nd ECS Meeting - National Harbor, USA
Varighed: 1 okt. 20175 okt. 2017

Konference

Konference232nd ECS Meeting
LandUSA
ByNational Harbor
Periode01/10/201705/10/2017

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Electrolysis
Electricity
Membranes
Liquids
Current density
Gases
Electrolytes
Water
Hydrogen
Oxygen
Heat generation
Energy absorption
Polymers
Cost reduction
Energy storage
Solar energy
Wind power
Porous materials
Anodes
Titanium

Citer dette

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title = "Analysing Gas-Liquid Flow in PEM Electrolyser Micro-Channels Using a Micro-Porous Ceramic as Gas Permeable Wall",
abstract = "The modern civilization is working based on a secure, sustainable, and economic energy. With the increasing share of renewable energies like solar and wind power, the secure and sustainable energy production will go under threat due to highly fluctuating electricity generated from these energy sources. An opportunity is to store energy as a means of energy surplus absorption. Polymer Electrolyte Membrane Electrolysis Cell (PEMEC) as a method of long term (more than an hour) energy storage, converts the unstable generated electricity to hydrogen. It is a key technology for closing the renewable energy economical system loop. It converts water to oxygen and high pressure hydrogen using electricity with a fast response rate that suits to damp grid fluctuations. One of the issues within these electrolysers is their high cost. One means of the cost reduction is to increase production from the existing cell by increasing its current density from 1 (A/cm2) (at the existing conventional cells) to 5 (A/cm2). At high current densities, due to high rate of oxygen generation and concentrated heat generation in the cell, issues related to heat and gas management come up which must be managed. In this study, an experimental setup is made of plexiglass, Titanium-felt (Ti-felt) and nano-porous ceramic. The setup demonstrates a similar gas-liquid flow encounters in PEM water electrolysis micro-channels and anode porous media. The nano-porous ceramic plate simulates small bubbles generation on the real membrane electrode assembly (MEA) surface. The movement of gas-liquid flow upward in the micro-channel at several water stoichiometric numbers are analysed and compared with a transparent PEMEC.",
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Analysing Gas-Liquid Flow in PEM Electrolyser Micro-Channels Using a Micro-Porous Ceramic as Gas Permeable Wall. / Lafmejani, Saeed Sadeghi; Olesen, Anders Christian; Al Shakhshir, Saher; Kær, Søren Knudsen.

I: ECS Transactions, Bind 80, Nr. 8, 2017, s. 1107-1115.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Analysing Gas-Liquid Flow in PEM Electrolyser Micro-Channels Using a Micro-Porous Ceramic as Gas Permeable Wall

AU - Lafmejani, Saeed Sadeghi

AU - Olesen, Anders Christian

AU - Al Shakhshir, Saher

AU - Kær, Søren Knudsen

PY - 2017

Y1 - 2017

N2 - The modern civilization is working based on a secure, sustainable, and economic energy. With the increasing share of renewable energies like solar and wind power, the secure and sustainable energy production will go under threat due to highly fluctuating electricity generated from these energy sources. An opportunity is to store energy as a means of energy surplus absorption. Polymer Electrolyte Membrane Electrolysis Cell (PEMEC) as a method of long term (more than an hour) energy storage, converts the unstable generated electricity to hydrogen. It is a key technology for closing the renewable energy economical system loop. It converts water to oxygen and high pressure hydrogen using electricity with a fast response rate that suits to damp grid fluctuations. One of the issues within these electrolysers is their high cost. One means of the cost reduction is to increase production from the existing cell by increasing its current density from 1 (A/cm2) (at the existing conventional cells) to 5 (A/cm2). At high current densities, due to high rate of oxygen generation and concentrated heat generation in the cell, issues related to heat and gas management come up which must be managed. In this study, an experimental setup is made of plexiglass, Titanium-felt (Ti-felt) and nano-porous ceramic. The setup demonstrates a similar gas-liquid flow encounters in PEM water electrolysis micro-channels and anode porous media. The nano-porous ceramic plate simulates small bubbles generation on the real membrane electrode assembly (MEA) surface. The movement of gas-liquid flow upward in the micro-channel at several water stoichiometric numbers are analysed and compared with a transparent PEMEC.

AB - The modern civilization is working based on a secure, sustainable, and economic energy. With the increasing share of renewable energies like solar and wind power, the secure and sustainable energy production will go under threat due to highly fluctuating electricity generated from these energy sources. An opportunity is to store energy as a means of energy surplus absorption. Polymer Electrolyte Membrane Electrolysis Cell (PEMEC) as a method of long term (more than an hour) energy storage, converts the unstable generated electricity to hydrogen. It is a key technology for closing the renewable energy economical system loop. It converts water to oxygen and high pressure hydrogen using electricity with a fast response rate that suits to damp grid fluctuations. One of the issues within these electrolysers is their high cost. One means of the cost reduction is to increase production from the existing cell by increasing its current density from 1 (A/cm2) (at the existing conventional cells) to 5 (A/cm2). At high current densities, due to high rate of oxygen generation and concentrated heat generation in the cell, issues related to heat and gas management come up which must be managed. In this study, an experimental setup is made of plexiglass, Titanium-felt (Ti-felt) and nano-porous ceramic. The setup demonstrates a similar gas-liquid flow encounters in PEM water electrolysis micro-channels and anode porous media. The nano-porous ceramic plate simulates small bubbles generation on the real membrane electrode assembly (MEA) surface. The movement of gas-liquid flow upward in the micro-channel at several water stoichiometric numbers are analysed and compared with a transparent PEMEC.

U2 - 10.1149/08008.1107ecst

DO - 10.1149/08008.1107ecst

M3 - Journal article

VL - 80

SP - 1107

EP - 1115

JO - ECS Transactions

JF - ECS Transactions

SN - 1938-6737

IS - 8

ER -