Full
Outline
To study the temperature evolution law in the hydrogen fuel cell diffusion layer and analyze the factors affecting the temperature distribution, the cathode and anode diffusion layers and their internal fluid were taken as the research objects, and a correlation method for the heat and mass transfer between diffusion layer Z-Y profile and X-Y profile was established. Considering the fluid Soret effect, Dufour effect, adsorption effect and fluid-solid conjugate heat transfer effect in the diffusion layer, and combined with the N-S equation, Brinkman-Darcy extended model, Langmuir adsorption equation and interfacial capture Cahn-Hilliard theory, a heat and mass double-diffusion model of gas-liquid two-phase flow in porous media was constructed. The Lattice Boltzmann method was used for numerical solution to demonstrate the temperature evolution law in the diffusion layer and elucidate the mechanism of fluid state influence on the temperature distribution. Results show that the diffusion layer's thermal conductivity is closely related to its internal fluid state. The thermal conductivity of hydrogen-water vapor atomized flow in the anode diffusion layer is better than that of the separated flow composed of air-liquid water in the cathode diffusion layer. Therefore, the anode diffusion layer has obvious advantages over the cathode diffusion layer in terms of the equilibrium of temperature field evolution, continuity of isotherm distribution and utilization of heat transfer area. The research results can provide a theoretical basis for improving the thermal management level of hydrogen fuel cells.
62
10
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
