Three-dimensional CFD modeling of H2/O2 HT-PEMFC based on H3PO4-doped PBI membranes

Panesi, A. R. Q.; Silva, R. P.; Cunha, Edgar Ferrari da; Korkischko, Ivan; Santiago, Elisabete I.

doi:10.1007/s11581-021-04107-9

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…The results and discussions using the model have been recognized by the reviewers of these journals. In addition, the commercial software COMSOL applied in this study was used in many previous studies and their results were validated well [14,15,18,27,28,44,45] . Therefore, the model was thought to be validated.…”

Section: Resultsmentioning

confidence: 60%

“…The COMSOL Multiphysics has a simulation function code consisting of Brinkman formula, Maxwell-Stefan formula, Butler-Volmer formula and heat transfer formula considering the heat generated by over-potentials, thermal conduction through each component in the cell and thermal convection via the flow through the channel as well as transferring from the exhaust gas to the ambient air. Some researchers previously carried out the numerical simulation using COMSOL Multiphysics for HT-PEMFC [4,14,15,[25][26][27][28] and achieved good results for the temperature, gases and current density distributions. In addition, the validation was conducted well.…”

Section: Governing Equationmentioning

confidence: 99%

“…(3) (4) where 𝑁 𝑖 ⃗⃗⃗⃗ indicates the vector molar flow rate on the interface between PEM and catalyst layer (mol/(m 2 •s)), Di indicates the diffusion constant of gas (m 2 /s), Ci indicates the ion i concentration (mol/m 3 ), zi indicates the ion valence (-), um,i indicates the ion i mobility ((s•mol)/kg), F indicates the faraday constant (C/mol), 𝜑 𝑙 indicates the electrical potential of liquid material [28] (V), Ji indicates the molar flow rate of the convection transfer phenomenon (mol/(m 2 •s)) and Ri,tot indicates the species' reaction rate (mol/(m 3 •s)).…”

Section: Governing Equationmentioning

confidence: 99%

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Impact of separator thickness on relationship between temperature distribution and mass & current density distribution in single HT-PEMFC

Nishimura,

Mishima,

Ito

et al. 2024

Therm. Sci. Eng.

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Considering the application of the polymer electrolyte membrane fuel cell (PEMFC), the separator thickness plays a significant role to determine the weight, the volume and the costs of the PEMFC. In addition, thermal management, i.e., temperature distribution is also important for the PEMFC system to obtain higher performance. However, there were few reports investigating the relation between the temperature profile and the power generation characteristics e.g., current density distribution of PEMFC operated at higher temperature (HT-PEMFC). This paper aims to study the impact of separator thickness on the temperature profile and the current density profile of HT-PEMFC. The impact of separator thickness on the gases i.e., H2, O2 profile of HT-PEMFC numerically was also studied using CFD software COMSOL Multiphysics in the paper. In the study, the operating temperature and the relative humidity (RH) of supply gas were varied with the separator thickness of 2.0 mm, 1.5 mm and 1.0 mm, respectively. The study revealed that the optimum thickness was 2.0 mm to realize higher power generation of HT-PEMFC. The heat capacity of the separator thickness of 2.0 mm was the biggest among the separators investigated in this study, resulting that the dry up of PEM and catalyst layer was lower compared to the thinner separator thickness. It was also clarified the effects of separator thickness of profile gases, e.g., O2, H2O, and current density profile became larger under the higher temperature and the lower RH conditions.

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Section: Resultsmentioning

confidence: 60%

Section: Governing Equationmentioning

confidence: 99%

Section: Governing Equationmentioning

confidence: 99%

See 1 more Smart Citation

Impact of separator thickness on relationship between temperature distribution and mass & current density distribution in single HT-PEMFC

Nishimura,

Mishima,

Ito

et al. 2024

Therm. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…This COMSOL Multiphysics has a simulation function code consisting of Brinkman formula, Maxwell-Stefan formula, Butler-Volmer formula and heat transfer formula considering the heat generated by over-potentials, thermal conduction through each component in the cell and thermal convection via the flow through the channel as well as transferring from the exhaust gas to the ambient air. Some researchers carried out the numerical simulation using COMSOL Multiphysics for HT-PEMFC [4,14,15,[23][24][25], which reported the temperature, gases and current density distributions well. Therefore, this software was used in the present study for the numerical simulation of HT-PEMFC.…”

Section: Considered Governing Equationsmentioning

confidence: 99%

“…where Ni indicates the vector molar flow rate on the interface between PEM and catalyst layer (mol/(m 2 ・s)), Di indicates the diffusion constant of gas (m 2 /s), Ci indicates the ion i concentration (mol/m 3 ), zi indicates the ion valence (-), um, i indicates the ion i mobility ((s・mol)/kg), F indicates the Faraday constant (C/mol), l indicates the electrical potential of liquid material [25] (V), Ji indicates the molar flow rate of the convection transfer phenomenon (mol/(m 2 ・s)) and Ri, tot indicates the species' reaction rate (mol/(m 3 ・s)).…”

Section: Considered Governing Equationsmentioning

confidence: 99%

Impact of Separator Thickness on Relationship between Temperature Distribution and Mass & Current Density Distribution in Single Cell of HT-PEFC

Nishimura,

Mishima,

Ito

et al. 2023

Preprint

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For the polymer electrolyte fuel cell (PEFC), the separator thickness plays an important role to determine the weight, the volume and the costs of the PEFC. In addition, thermal management, i.e. temperature distribution is also important for the PEFC system to obtain higher performance. However, there were few reports investigating the relationship between the temperature distribution and the power generation performance such as current density distribution of PEFC operated at higher temperature (HT-PEFC). The aim of this study is to clarify the impact of separator thickness on the relationship between the temperature distribution and the current density distribution of HT-PEFC. This study has also investigated the impact of separator thickness on the relationship between the temperature distribution and the gases such as H2, O2 and the current density distribution of HT-PEFC numerically using CFD software COMSOL Multiphysics. The separator thicknesses of 2.0 mm, 1.5 mm and 1.0 mm were studied. In the study, the operation temperature and the relative humidity (RH) of supply gas were also changed. As a result, it was revealed that the optimum separator thickness was 2.0 mm to obtain higher power generation of HT-PEFC. Since the heat capacity in the case of the separator thickness of 2.0 mm was the largest among the separators investigated in this study, the dehydration of PEM and catalyst layer was smaller compared with the thinner separator thicknesses. It was also revealed that the impacts of separator thickness on distribution of gases, e.g. O2, H2O, and current density distribution became larger under higher temperature and lower RH conditions. This study also concluded that the tendency of temperature distribution matched those of O2, H2O and current density distributions.

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Electrocatalytic contributions from Brazilian research groups for clean energy conversion and environmental remediation

Medina,

Carvalho,

da Silva

et al. 2024

J Solid State Electrochem

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Three-dimensional CFD modeling of H2/O2 HT-PEMFC based on H3PO4-doped PBI membranes

Cited by 8 publications

References 7 publications

Impact of separator thickness on relationship between temperature distribution and mass & current density distribution in single HT-PEMFC

Impact of separator thickness on relationship between temperature distribution and mass & current density distribution in single HT-PEMFC

Impact of Separator Thickness on Relationship between Temperature Distribution and Mass & Current Density Distribution in Single Cell of HT-PEFC

Electrocatalytic contributions from Brazilian research groups for clean energy conversion and environmental remediation

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Three-dimensional CFD modeling of H2/O2 HT-PEMFC based on H3PO4-doped PBI membranes

Cited by 8 publications

References 7 publications

Impact of separator thickness on relationship between temperature distribution and mass & current density distribution in single HT-PEMFC

Impact of separator thickness on relationship between temperature distribution and mass & current density distribution in single HT-PEMFC

Impact of Separator Thickness on Relationship between Temperature Distribution and Mass &amp; Current Density Distribution in Single Cell of HT-PEFC

Electrocatalytic contributions from Brazilian research groups for clean energy conversion and environmental remediation

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Product

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About

Impact of Separator Thickness on Relationship between Temperature Distribution and Mass & Current Density Distribution in Single Cell of HT-PEFC