论文标题
阴极侧运输现象研究和锥形平行流场PEMFC的多目标优化
Cathode Side Transport Phenomena Investigation and Multi-Objective Optimization of a Tapered Parallel Flow Field PEMFC
论文作者
论文摘要
质子交换膜燃料电池（PEMFC）提供稳定的，无发射的高效功率。 PEMFC的水管理和耐用性直接受阴极侧的转运现象的影响。在本研究中，在锥形平行流场中研究和优化了运输现象。流场中的主要通道是锥形的，这使限制电流密度增加了41％。两个目标，即水的饱和度和耐药性，被认为是锥形平行流场PEMFC中传输现象的指标。两侧的工作压力，温度，化学计量法和气体扩散层的孔隙率被选为要优化的参数。通过整合3D多相流计算流体动力学和响应表面方法，为目标生成了两个功能。多目标优化（MOO）使用两种不同的方法进行。多目标粒子群优化（MOPSO）和非主导分类遗传算法II（NSGA-II）用于产生两个具有挑战性的帕累托阵线。结果表明，MOPSO的性能比NSGA-II更好。 Mopso以较低的运行时间识别出相同的帕累托阵线。在最后一步中，使用与理想解决方案（TOPSIS）相似的订单偏好技术可从帕累托前部选择一个最佳点。将结果与实验数据进行比较，并观察到良好的对应关系。最佳特征是温度323，压力1 ATM，阳极化学计量3，阴极化学计量学2.62和孔隙率为0.68。孔隙率和压力在确定水饱和度和电阻方面起着最重要的作用。
A Proton Exchange Membrane Fuel Cell (PEMFC) provides stable, emission-free, high-efficiency power. Water management and durability of PEMFCs are directly affected by transport phenomena at the cathode side. In the present study, transport phenomena are investigated and optimized in a tapered parallel flow field. Main channels in the flow field are tapered, which increases limiting current density by 41%. Two objectives, i.e. water saturation and transport resistance, are considered metrics for transport phenomena in a tapered parallel flow field PEMFC. Operating pressure, temperature, stoichiometries at both sides, and the porosity of gas diffusion layers are selected as parameters to be optimized. Two functions are generated for objectives by integrating 3D multiphase-flow computational fluid dynamics and Response Surface Methodology. Multi-Objective Optimization (MOO) is carried out with two different methods. Multi-Objective Particle Swarm Optimization (MOPSO) and Non-dominated Sorting Genetic Algorithm II (NSGA-II) are employed to produce two challenging Pareto fronts. The results demonstrate that MOPSO performs better than NSGA-II. MOPSO recognized quite the same Pareto front with lower runtime. In the last step, the Technique of Order Preference Similarity to the Ideal Solution (TOPSIS) is used to select an optimum point from the Pareto front. The results are compared against experimental data, and good correspondence is observed. The optimum features are temperature 323, pressure 1 atm, anode stoichiometry 3, cathode stoichiometry 2.62, and porosity 0.68. The porosity and pressure played the most significant roles in determining water saturation and resistance.
