scholarly journals Entropy Generation Analysis of a Proton Exchange Membrane Fuel Cell (PEMFC) with a Fermat Spiral as a Flow Distributor

10.5772/51979 ◽  
2012 ◽  
Author(s):  
V.H. Rangel-Hernandez ◽  
C. Damian-Ascencio ◽  
D. Juarez-Robles ◽  
A. Gallegos-Munoz ◽  
A. Zaleta-Aguilar ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Entropy Generation ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane ◽  
Flow Distributor

scholarly journals Entropy generation analysis of a proton exchange membrane fuel cell (PEMFC) with a fermat spiral as a flow distributor

Energy ◽  
2011 ◽  
Vol 36 (8) ◽  
pp. 4864-4870 ◽  
Author(s):  
V.H. Rangel-Hernandez ◽  
C. Damian-Ascencio ◽  
D. Juarez-Robles ◽  
A. Gallegos-Muñoz ◽  
A. Zaleta-Aguilar ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Entropy Generation ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane ◽  
Flow Distributor

Optimal design of a novel M-like channel in bipolar plates of proton exchange membrane fuel cell based on minimum entropy generation

2020 ◽  
Vol 205 ◽  
pp. 112386 ◽  
Author(s):  
Zhongmin Wan ◽  
Wenxiang Quan ◽  
Chen Yang ◽  
Hanzhang Yan ◽  
Xi Chen ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Optimal Design ◽  
Entropy Generation ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Bipolar Plates ◽  
Minimum Entropy ◽  
Minimum Entropy Generation ◽  
Exchange Membrane

Numerical modeling of a proton exchange membrane fuel cell with tree-like flow field channels based on an entropy generation analysis

Energy ◽  
2017 ◽  
Vol 133 ◽  
pp. 306-316 ◽  
Author(s):  
Cesar E. Damian-Ascencio ◽  
Adriana Saldaña-Robles ◽  
Abel Hernandez-Guerrero ◽  
Sergio Cano-Andrade
Keyword(s):  
Numerical Modeling ◽  
Fuel Cell ◽  
Flow Field ◽  
Entropy Generation ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Exchange Membrane

Highly proton conductive membranes based on carboxylated cellulose nanofibres and their performance in proton exchange membrane fuel cells

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Annika Carlson ◽  
Shun Yu ◽  
Göran Lindbergh ◽  
Rakel Wreland Lindström ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Surface Charge ◽  
Proton Exchange Membrane ◽  
Membrane Surface ◽  
Proton Exchange ◽  
Membrane Thickness ◽  
Fuel Cell Performance ◽  
Cellulose Nanofibres ◽  
Exchange Membrane

The performance of thin carboxylated cellulose nanofiber-based (CNF) membranes as proton exchange membranes in fuel cells has been measured in-situ as a function of CNF surface charge density (600 and 1550 µmol g<sup>-1</sup>), counterion (H<sup>+</sup>or Na<sup>+</sup>), membrane thickness and fuel cell relative humidity (RH 55 to 95 %). The structural evolution of the membranes as a function of RH as measured by Small Angle X-ray scattering shows that water channels are formed only above 75 % RH. The amount of absorbed water was shown to depend on the membrane surface charge and counter ions (Na<sup>+</sup>or H<sup>+</sup>). The high affinity of CNF for water and the high aspect ratio of the nanofibers, together with a well-defined and homogenous membrane structure, ensures a proton conductivity exceeding 1 mS cm<sup>-1</sup>at 30 °C between 65 and 95 % RH. This is two orders of magnitude larger than previously reported values for cellulose materials and only one order of magnitude lower than Nafion 212. Moreover, the CNF membranes are characterized by a lower hydrogen crossover than Nafion, despite being ≈ 30 % thinner. Thanks to their environmental compatibility and promising fuel cell performance the CNF membranes should be considered for new generation proton exchange membrane fuel cells.<br>

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