Measurement of deuterium isotope separation by polymer electrolyte fuel cell stack

Tanii, Risako; Ogawa, Ryota; Matsushima, Hisayoshi; Ueda, Mikito

doi:10.1016/j.ijhydene.2018.11.170

Cited by 8 publications

(2 citation statements)

References 31 publications

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“…They realized that the velocity and momentum of the fluid decreased after colliding with the manifold wall, which improves the flow distribution. Tanii et al [10] measured the voltage of cells in a 9-cell fuel cell stack with serial and parallel flow patterns. Experimental data showed that the cell voltage variations in the parallel flow pattern were less than in the serial flow pattern.…”

Section: Introductionmentioning

confidence: 99%

Manifold Design in a PEM Fuel Cell Stack to Improve Flow Distribution Uniformity

2022

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In this paper, a numerical study was performed to investigate the flow distribution in a 52-cell proton exchange membrane (PEM) fuel cell stack. The non-uniformity factor and standard deviation parameters were used to determine the flow distribution uniformity. Flow channels of each bipolar plate were replaced with straight parallel channels filled with porous media to reduce computational costs. The effect of external and integrated humidifiers on the gas distribution among the channels was investigated. Using integrated humidifiers improved the non-uniformity factor and standard deviation by 35% and 19%, respectively. Two methods were employed to improve the flow distribution: gradual reduction of the manifold height, and installing a bump at the bottom wall of the inlet manifold. Reducing the height of the inlet manifold in the stack with integrated and external humidifiers decreased the non-uniformity factor by 62% and 44%, respectively. The installation of the bump on the manifold wall enhanced flow distribution in the stack with the external humidifier. The results show that by using an integrated humidifier in this method, the flow distribution became more non-uniform. The best flow distribution in the stack was obtained with an integrated humidifier and a 90% reduction in manifold height. In this case, the flow rate passing through each channel was more than 99% of the average mass flow rate passing through the entire channel.

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Section: Introductionmentioning

confidence: 99%

Manifold Design in a PEM Fuel Cell Stack to Improve Flow Distribution Uniformity

2022

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“…They reported a highest separation factor of about 10. Our group has applied PEMs 15,16 and AEMs 17 to fuel cells. D was effectively extracted as produced water during power generation, because D + is more easily electrochemically reduced by oxygen than H + .…”

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confidence: 99%

Communication—Deuterium Isotope Separation by Solid Polymer Electrolyte Water Electrolysis

Matsushima

Sato

Ueda

et al. 2019

J. Electrochem. Soc.

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Electrolytic deuterium (D) separation from protium-containing solution has been investigated. Proton (PEM) and anion exchange membrane (AEM) electrolysis were performed at constant current. The mass analysis of hydrogen gas and water vapor was carried out. For both PEM and AEM electrolysis, the D concentration in the evolved hydrogen gas was lower than that of the initial electrolytic solution. The D concentration in the water vapor was unchanged by PEM electrolysis, but was increased by AEM. The separation factor of PEM was smaller than that of AEM, which was attributed to the humidification state on platinum catalyst.

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Deuterium isotope separation by polymer electrolyte fuel cells connected in series

Matsushima

Ogawa

Ueda

2019

International Journal of Hydrogen Energy

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Measurement of deuterium isotope separation by polymer electrolyte fuel cell stack

Cited by 8 publications

References 31 publications

Manifold Design in a PEM Fuel Cell Stack to Improve Flow Distribution Uniformity

Manifold Design in a PEM Fuel Cell Stack to Improve Flow Distribution Uniformity

Communication—Deuterium Isotope Separation by Solid Polymer Electrolyte Water Electrolysis

Deuterium isotope separation by polymer electrolyte fuel cells connected in series

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