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首页> 外文会议>ASME international heat transfer conference;IHTC14 >MODELING OF HEAT TRANSPORT IN A DIRECT METHANOL FUEL CELL WITH ANISOTROPIC GAS DIFFUSION LAYERS
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MODELING OF HEAT TRANSPORT IN A DIRECT METHANOL FUEL CELL WITH ANISOTROPIC GAS DIFFUSION LAYERS

机译：具有各向异性气体扩散层的直接甲醇燃料电池中的传热模型

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A non-isothermal two-dimensional two-phase numerical model is developed in this paper to investigate the heat generation and transport processes in a direct methanol fuel cell with anisotropic gas diffusion layers (GDLs). Thermal contact resistances at the GDL/CL (catalyst layer) and GDL/Rib interfaces, and the deformation of GDLs are considered together with the inherent anisotropy of the GDL. Latent heat effects due to condensation/evaporation of water and methanol between liquid and gas phases are also taken into account. Formulation of the two-phase mass transport across the membrane electrode assembly (MEA) is mainly based on the classical multiphase flow theory in the porous media. The numerical results show that the overall heat flux in MEA is mainly contributed to heat generation in anode and cathode CLs. And the three anisotropic factors of the GDLs, including the inherent anisotropy, the spatially varying contact resistances, and the deformation of GDLs, have a strong impact on the heat transport processes in the DMFC by altering the distribution of temperature across the MEA.
机译：本文建立了一个非等温二维两相数值模型，以研究具有各向异性气体扩散层（GDL）的直接甲醇燃料电池中的热量产生和传递过程。 GDL / CL（催化剂层）和GDL / Rib界面处的热接触电阻以及GDL的变形与GDL的固有各向异性一起考虑在内。还应考虑到由于液相和气相之间水和甲醇的冷凝/蒸发而产生的潜热效应。跨膜电极组件（MEA）的两相质量传输的公式化主要基于多孔介质中的经典多相流理论。数值结果表明，MEA中的总热通量主要有助于阳极和阴极CL中的热量产生。 GDL的三个各向异性因素，包括固有的各向异性，空间变化的接触电阻和GDL的变形，都会通过改变MEA上的温度分布而对DMFC中的传热过程产生强烈影响。

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