4月 10, 2018

论文代写:水资源管理

论文代写:水资源管理

由于水资源管理是一个至关重要的问题,因此选择这一领域进行研究。这个问题对于聚合物电解质膜(PEM)燃料电池(PEMFC)的设计和操作至关重要。这成为一个问题,因为PEM燃料电池内液态水的收集和运输会降低PEM燃料电池的性能。研究确定,水经常通过完全加湿的阳极和来自阴极气体的蒸汽到达PEM燃料电池。这发生的目的是为聚合物膜的电解质提供所需的水合作用。同时,在电池的阴极产生水作为电化学反应的一部分。水通过各种机制在细胞内转移。电渗的阻力效应将阳极处的水转移到阴极的一侧。

论文代写:水资源管理
阳极和阴极之间浓度的差异使反向扩散发生,并且由于梯度压力可导致水常规存在。因此,为了理解水管理作为一个问题及其解决方案,已经选择了三篇论文,通过中子成像对PEMFC中的水分配问题提供了重要见解。文章的重点之一是通过运行PEMFC飞机的水分布的中子图像。另一篇文章讨论了通过PEMFC中的中子成像进行水合测量。第三部分重点介绍PEMFC通过中子成像的性能和水分配。中子成像技术相对较新,因此从这个角度来看这些研究更加有趣。

论文代写:水资源管理

This area has been selected for the study as the management of water is a crucial issue. This issues is critical for the polymer electrolyte membrane (PEM) fuel cells (PEMFC)’ design as well as operation. This becomes an issue as the collection and transportation of the water in liquid form within the PEM fuel cells can reduce the performance of the PEM fuel cell. It is identified from the research that the water is often reached to the PEM fuel cell by the anode that is completely humidified and the steam from the cathode gas. This takes place for the purpose of providing the required hydration for the electrolyte of the polymer membrane. Simultaneously, the water is generated at the cell’s cathode as part reaction of the electro-chemical. The water is transferred within the cell by various mechanisms. The drag effect of the electroosmotic transfers the water present at anode to the side of the cathode.

论文代写:水资源管理
The difference in the concentration among the anode and cathode enables the back diffusion to take place and it can result in the water convention to exist due to the gradient pressure. Therefore, in order to understand the water management as an issue and its resolution, three papers have been selected that provide with the critical insight to the topic of water distribution in PEMFC by neutron imaging. One of the article focuses on the neutron images of the water distribution that is through plane of the operating PEMFC. Another article discusses the hydration measurement through the neutron imaging in PEMFC. The third focuses on the performance and water distribution among PEMFC through the neutron imaging. The technique of neutron imaging is relatively new due to which it is further interesting to review these studies from this perspective.

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