Internal Humidification in PEM Fuel Cells Using Wick Based Water Transport

2015 ◽  
Vol 162 (9) ◽  
pp. F1000-F1010 ◽  
Author(s):  
Ramendra Pandey ◽  
Harshal Agarwal ◽  
B. Saravanan ◽  
P. Sridhar ◽  
Santoshkumar D. Bhat
Keyword(s):  
Fuel Cells ◽  
Water Transport ◽  
Pem Fuel Cells

Effect of Vibration on the Liquid Water Transport of PEM Fuel Cells

2009 ◽  
Author(s):  
Luis Breziner ◽  
Peter Strahs ◽  
Parsaoran Hutapea
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Water Transport ◽  
Liquid Water ◽  
Pem Fuel Cells ◽  
Gas Diffusion ◽  
Cell Performance ◽  
Sinusoidal Vibration ◽  
Fuel Cell Performance ◽  
Liquid Water Transport

The objective of this research is to analyze the effects of vibration on the performance of hydrogen PEM fuel cells. It has been reported that if the liquid water transport across the gas diffusion layer (GDL) changes, so does the overall cell performance. Since many fuel cells operate under a vibrating environment –as in the case of automotive applications, this may influence the liquid water concentration across the GDL at different current densities, affecting the overall fuel cell performance. The problem was developed in two main steps. First, the basis for an analytical model was established using current models for water transport in porous media. Then, a series of experiments were carried, monitoring the performance of the fuel cell for different parameters of oscillation. For sinusoidal vibration at 10, 20 and 50Hz (2 g of magnitude), a decrease in the fuel cell performance by 2.2%, 1.1% and 1.3% was recorded when compared to operation at no vibration respectively. For 5 g of magnitude, the fuel cell reported a drop of 5.8% at 50 Hz, whereas at 20 Hz the performance increased by 1.3%. Although more extensive experimentation is needed to identify a relationship between magnitude and frequency of vibration affecting the performance of the fuel cell as well as a throughout examination of the liquid water formation in the cathode, this study shows that sinusoidal vibration, overall, affects the performance of PEM fuel cells.

Liquid Water Transport in PEM Fuel Cells

2019 ◽  
Vol 12 (1) ◽  
pp. 67-79 ◽  
Author(s):  
Jay B. Benziger ◽  
Tamara Whitaker ◽  
Erin Kimball ◽  
Ioannis G. Kevrekidis
Keyword(s):  
Fuel Cells ◽  
Water Transport ◽  
Liquid Water ◽  
Pem Fuel Cells ◽  
Liquid Water Transport

Non-isothermal transient modeling of water transport in PEM fuel cells

2007 ◽  
Vol 165 (1) ◽  
pp. 232-243 ◽  
Author(s):  
Hao Wu ◽  
Peter Berg ◽  
Xianguo Li
Keyword(s):  
Fuel Cells ◽  
Water Transport ◽  
Pem Fuel Cells ◽  
Transient Modeling

Investigation of water transport and its effect on performance of high-temperature PEM fuel cells

2014 ◽  
Vol 149 ◽  
pp. 271-277 ◽  
Author(s):  
Caizhi Zhang ◽  
Lan Zhang ◽  
Weijiang Zhou ◽  
Youyi Wang ◽  
Siew Hwa Chan
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Water Transport ◽  
Pem Fuel Cells ◽  
High Temperature Pem

Improved Passive Water Management Design for Use in Unitized Regenerative Fuel Cells

2014 ◽  
Author(s):  
Sandeep S. Lele ◽  
Michael A. Sizemore ◽  
Drazen Fabris
Keyword(s):  
Water Management ◽  
Fuel Cells ◽  
Water Transport ◽  
Proton Exchange Membrane ◽  
Management Strategies ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Porous Polymer ◽  
Transport Layer ◽  
Stable Operation

Proton Exchange Membrane (PEM) fuel cells require effective water transport away from the cathode to ensure stable operation. Many existing water management strategies involve active methods, reducing system efficiency by introducing parasitic losses. In the present work, we report on the improved design and fabrication of a passive water management scheme involving UV-catalyzed porous polymer wicks. The design features two connected porous domains consisting of a methacrylate-based transport layer and polyvinyl alcohol storage layer. In our previous prototype, large water transport lengths (∼12 mm) prevented adequate removal of generated water. The capillary pressure drop across the two porous domains was insufficient to drive a flow rate matched to the rate of generation. Thus, the current design produces a shorter transport distance (∼3 mm) by developing a new vertical design. An independently produced SU-8 photolithographic mold is incorporated to improve the fabrication process.

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