scholarly journals Numerical investigation on the characteristics of water transfer in PEMFC with bionic flow channel

2019 ◽  
Vol 83 ◽  
pp. 01005
Author(s):  
Tao Chen ◽  
Shihua Liu ◽  
Li Yang
Keyword(s):  
Water Transport ◽  
Polymer Electrolyte Membrane ◽  
Flow Channel ◽  
Water Drainage ◽  
Transmission Characteristics ◽  
Electrolyte Membrane ◽  
Numerical Studies ◽  
Flow Channels ◽  
Significant Difference ◽  
Different Types

The content and the transmission characteristics of the water in the polymer electrolyte membrane fuel cell (PEMFC) have a significant influence on its performance. So far, there are few separate numerical studies on the process of water transport in the bionic flow channel, and the performance of bionic flow channel is different from conventional flow channel in part owing to the differences of their water drainage. Therefore, in order to understand the water drainage process of bionic flow channel, two different types of bionic flow channels are adopted in this paper. The method of numerical simulation is used to study the transmission process of liquid water in the bionic flow channel of different placement orientations. The simulation results found that the orientations of bionic flow channel has an influence on the process of water transport in the flow channel, and the process of water drainage also has a significant difference in the two different types of bionic flow channel.

Neutron radiographic in operando investigation of water transport in polymer electrolyte membrane fuel cells with channel barriers

2017 ◽  
Vol 148 ◽  
pp. 604-610 ◽  
Author(s):  
Saad S. Alrwashdeh ◽  
Ingo Manke ◽  
Henning Markötter ◽  
Jan Haußmann ◽  
Nikolay Kardjilov ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Water Transport ◽  
Polymer Electrolyte Membrane ◽  
Electrolyte Membrane ◽  
In Operando

Numerical Validation of Water Transport in a Polymer Electrolyte Membrane

2013 ◽  
Vol 50 (2) ◽  
pp. 967-978
Author(s):  
R. S. Fu ◽  
N. Khajeh-Hosseini-Dalasm ◽  
U. Pasaogullari
Keyword(s):  
Polymer Electrolyte ◽  
Water Transport ◽  
Polymer Electrolyte Membrane ◽  
Numerical Validation ◽  
Electrolyte Membrane

Effects of Geometrical Parameters on Improving the Transversal Mass Transport in PEM Fuel Cells

2006 ◽  
Author(s):  
Yanxia Zhao ◽  
Renwei Mei ◽  
James F. Klausner
Keyword(s):  
Fuel Cells ◽  
Flow Rate ◽  
Fluid Transport ◽  
Polymer Electrolyte Membrane ◽  
Pem Fuel Cells ◽  
Gas Diffusion ◽  
Flow Channel ◽  
Geometrical Parameters ◽  
Electrolyte Membrane ◽  
Transversal Flow

A computational model using Lattice Boltzmann Equation (LBE) method is employed to investigate the fluid transport on the anode side of Polymer Electrolyte Membrane (PEM) fuel cells, with an emphasis on mass transfer enhancement. A 3-dimensional LBE code is developed to solve the flows in the channel and the porous media in the gas diffusion layer (GDL) simultaneously. Multiple flow enhancers (obstructions in the flow channel) are placed in the channel to enhance the transversal flow across the GDL. The mass flow rate, the velocity field and the pressure distribution are analyzed. The effects of flow enhancers are assessed. The results show that the transversal flow across the GDL is enhanced by placing flow enhancers in the channel. Increasing flow enhancer size can significantly increase the transversal flow rate, with high pressure-loss through the flow channel. The results also demonstrate that the location of flow enhancers in the flow channel have a remarkable impact on the transversal flow rate. The transversal flow rate increases as the GDL porosity increases.

Droplet and slug formation in polymer electrolyte membrane fuel cell flow channels: The role of interfacial forces

2011 ◽  
Vol 196 (23) ◽  
pp. 10057-10068 ◽  
Author(s):  
Carlos E. Colosqui ◽  
May J. Cheah ◽  
Ioannis G. Kevrekidis ◽  
Jay B. Benziger
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Interfacial Forces ◽  
Electrolyte Membrane ◽  
Flow Channels

Effect of Operating Conditions on the Water Transport Phenomena at the Cathode of Polymer Electrolyte Membrane Fuel Cell

2009 ◽  
Author(s):  
Sang Hern Seo ◽  
Chang Sik Lee
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Water Transport ◽  
Flow Rate ◽  
Water Droplet ◽  
Polymer Electrolyte Membrane ◽  
Transport Phenomena ◽  
Operating Conditions ◽  
Water Flooding ◽  
Electrolyte Membrane

Water management is very important for polymer electrolyte membrane fuel cell because the fuel cell performance is decreased by flooding phenomena generated by liquid water in the cathode channels. In addition, the proton conductivity and water transport of membrane could become different by hydration contents of membrane. This study is observed water transport phenomena of cathode channels with a polymer electrolyte membrane fuel cell according to various operating conditions. In order to obtain the water images, the transparent fuel cell consists of polycarbonate window of the cathode end plate and gold coated stainless steel as the flow field and current collector of the cathode. To investigate the effects of operating conditions on the water transport, experiments were conducted under various operating conditions such as cell temperature, cathode flow rate and cathode backpressure. As operating time elapsed, it is observed that the water droplet formation, growth, coalescence and removal occurred in the cathode channel. It can be known that the high cathode flow rate prevents water flooding by removal of water in the cathode flow channel. Also, the quantity of water droplet was increased by the high cathode backpressure.

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