A novel geometrical design of gas‐to‐gas planar membrane humidifier for proton electrolyte membrane fuel cells

Wang, Bing-Bing; Li, Wen-Ken; Lee, Chung-Yuan; Yan, Wei‐Mon; Ghalambaz, Mohammad

doi:10.1002/er.6854

Cited by 6 publications

(1 citation statement)

References 26 publications

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“…An overview of the application of CFD models and simulations in the field of membrane technology can be found in [17]. CFD models of flat membrane humidifiers are set up and investigated in different studies and are shown to be an accurate tool to investigate the water transfer in membrane humidifiers [15,16,18,19]. Schmitz et al present a 3D CFD model of a hollow fibre humidifier to analyse the sorption behaviour and the water transport in membrane humidifiers and validate the model with measurement data [20].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Surrogate Models for Vapour Transport and Distribution in a Hollow Fibre Membrane Humidifier

et al. 2023

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To achieve high efficiency and low degradation of a polymer electrolyte fuel cell (PEMFC), it is necessary to maintain an appropriate level of humidification in the fuel cell membrane. Thus, membrane humidifiers are typically used in PEMFC systems. Parameter studies are important to evaluate membrane humidifiers under various operating conditions to reduce the amount of physical tests. However, simulative studies are computationally expensive when using detailed models. To reduce the computational cost, surrogate models are set up. In our study, a 3D computational fluid dynamics (CFD) model of a hollow fibre membrane humidifier is presented and validated using measurement data. Based on the results of the validated CFD model, a surrogate model of the humidifier is constructed using proper orthogonal decomposition (POD) in combination with different interpolation methods. To evaluate the surrogate models, their results are compared against reference solutions from the CFD model. Our results show that a Halton design combined with a thin-plate-spline interpolation results in the most accurate surrogate humidifier model. Its normalised mean absolute error for 18 test points when predicting the water mass fraction in the membrane humidifier is 0.58%. Furthermore, it is demonstrated that the solutions of the POD model can be used to initialise CFD calculations and thus accelerate the calculation of steady state CFD solutions.

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Section: Introductionmentioning

confidence: 99%

Analysis of Surrogate Models for Vapour Transport and Distribution in a Hollow Fibre Membrane Humidifier

et al. 2023

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Analysis of the effects of fiber positioning on water transfer in hollow fiber humidifiers using cfd and statistical uniformity metrics

Pollak,

Tegethoff,

Koehler

2024

Heat Mass Transfer

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Hollow fiber membrane humidifiers are used in mobile proton exchange membrane (PEM) fuel cell systems to humidify the supply air of the fuel cell and thereby to achieve a sufficient level of humidification of the PEM. A hollow fiber humidifier contains a large amount of hollow fiber membrane that transfers water from the moisture-laden exhaust gas of the fuel cell to the dry supply air along a concentration gradient. In this study, the effect of fiber placement on the water transfer inside hollow fiber bundles is investigated in detail using a validated CFD model of a membrane humidifier. To analyze the effects of fiber positioning, 80 simulations using humidifiers with different fiber numbers and placements are carried out and analyzed for two operating points. Two statistical metrics, the wrap-around discrepancy and a distance-based metric called MaxiMin, are used to assess the uniformity and space-filling properties of the fiber placements. Correlations of the uniformity of fiber placement and the water transfer inside hollow fiber bundles are then identified. Furthermore, it is demonstrated that both, the wrap-around discrepancy and the MaxiMin, can be used as optimization criterion for the fiber placement inside humidifiers to maximize water transfer rates. The optimization leads to an average improvement of 5 % in water transfer compared to a median random fiber distribution.

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Experimental analysis of water transfer and thermal–hydraulic performance of membrane humidifiers with three flow field designs

et al. 2023

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A novel geometrical design of gas‐to‐gas planar membrane humidifier for proton electrolyte membrane fuel cells

Cited by 6 publications

References 26 publications

Analysis of Surrogate Models for Vapour Transport and Distribution in a Hollow Fibre Membrane Humidifier

Analysis of Surrogate Models for Vapour Transport and Distribution in a Hollow Fibre Membrane Humidifier

Analysis of the effects of fiber positioning on water transfer in hollow fiber humidifiers using cfd and statistical uniformity metrics

Experimental analysis of water transfer and thermal–hydraulic performance of membrane humidifiers with three flow field designs

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