Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells
Water management within the gas diffusion layer (GDL) plays an important role in the performance of the proton exchange membrane fuel cell (PEMFC) and its reliability. The compression of the gas diffusion layer during fabrication and assembly has a significant impact on the mass transport, and the p...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/13/3/303 |
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| author | Hao Wang Guogang Yang Qiuwan Shen Shian Li Fengmin Su Ziheng Jiang Jiadong Liao Guoling Zhang Juncai Sun |
| author_facet | Hao Wang Guogang Yang Qiuwan Shen Shian Li Fengmin Su Ziheng Jiang Jiadong Liao Guoling Zhang Juncai Sun |
| author_sort | Hao Wang |
| collection | DOAJ |
| description | Water management within the gas diffusion layer (GDL) plays an important role in the performance of the proton exchange membrane fuel cell (PEMFC) and its reliability. The compression of the gas diffusion layer during fabrication and assembly has a significant impact on the mass transport, and the porosity gradient design of the gas diffusion layer is an essential way to improve water management. In this paper, the two-dimensional lattice Boltzmann method (LBM) is applied to investigate the two-phase behavior in gas diffusion layers with different porosity gradients under compression. Compression results in an increase in flow resistance below the ribs, prompting the appearance of the flow path of liquid water below the channel, and liquid water breaks through to the channel more quickly. GDLs with linear, multilayer, and inverted V-shaped porosity distributions with an overall porosity of 0.78 are generated to evaluate the effect of porosity gradients on the liquid water transport. The liquid water saturation values within the linear and multilayer GDLs are significantly reduced compared to that of the GDL with uniform porosity, but the liquid water within the inverted V-shaped GDL accumulates in the middle region and is more likely to cause flooding. |
| first_indexed | 2024-03-11T06:12:00Z |
| format | Article |
| id | doaj.art-115ad06c3102452eb1922a6884e1ab03 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-11T06:12:00Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-115ad06c3102452eb1922a6884e1ab032023-11-17T12:34:40ZengMDPI AGMembranes2077-03752023-03-0113330310.3390/membranes13030303Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel CellsHao Wang0Guogang Yang1Qiuwan Shen2Shian Li3Fengmin Su4Ziheng Jiang5Jiadong Liao6Guoling Zhang7Juncai Sun8Marine Engineering College, Dalian Maritime University, Dalian 116026, ChinaMarine Engineering College, Dalian Maritime University, Dalian 116026, ChinaMarine Engineering College, Dalian Maritime University, Dalian 116026, ChinaMarine Engineering College, Dalian Maritime University, Dalian 116026, ChinaMarine Engineering College, Dalian Maritime University, Dalian 116026, ChinaMarine Engineering College, Dalian Maritime University, Dalian 116026, ChinaMarine Engineering College, Dalian Maritime University, Dalian 116026, ChinaMarine Engineering College, Dalian Maritime University, Dalian 116026, ChinaMarine Engineering College, Dalian Maritime University, Dalian 116026, ChinaWater management within the gas diffusion layer (GDL) plays an important role in the performance of the proton exchange membrane fuel cell (PEMFC) and its reliability. The compression of the gas diffusion layer during fabrication and assembly has a significant impact on the mass transport, and the porosity gradient design of the gas diffusion layer is an essential way to improve water management. In this paper, the two-dimensional lattice Boltzmann method (LBM) is applied to investigate the two-phase behavior in gas diffusion layers with different porosity gradients under compression. Compression results in an increase in flow resistance below the ribs, prompting the appearance of the flow path of liquid water below the channel, and liquid water breaks through to the channel more quickly. GDLs with linear, multilayer, and inverted V-shaped porosity distributions with an overall porosity of 0.78 are generated to evaluate the effect of porosity gradients on the liquid water transport. The liquid water saturation values within the linear and multilayer GDLs are significantly reduced compared to that of the GDL with uniform porosity, but the liquid water within the inverted V-shaped GDL accumulates in the middle region and is more likely to cause flooding.https://www.mdpi.com/2077-0375/13/3/303gas diffusion layercompressionporosity gradienttwo-phase behaviorlattice Boltzmann method |
| spellingShingle | Hao Wang Guogang Yang Qiuwan Shen Shian Li Fengmin Su Ziheng Jiang Jiadong Liao Guoling Zhang Juncai Sun Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells Membranes gas diffusion layer compression porosity gradient two-phase behavior lattice Boltzmann method |
| title | Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells |
| title_full | Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells |
| title_fullStr | Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells |
| title_full_unstemmed | Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells |
| title_short | Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells |
| title_sort | effects of compression and porosity gradients on two phase behavior in gas diffusion layer of proton exchange membrane fuel cells |
| topic | gas diffusion layer compression porosity gradient two-phase behavior lattice Boltzmann method |
| url | https://www.mdpi.com/2077-0375/13/3/303 |
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