Effects of operating parameters on the performance of a high-pressure proton exchange membrane electrolyzer

2012 ◽  
Vol 37 (5) ◽  
pp. 457-467 ◽  
Author(s):  
Ömer F. Selamet ◽  
M. Caner Acar ◽  
Mahmut D. Mat ◽  
Yüksel Kaplan
Keyword(s):  
High Pressure ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Operating Parameters ◽  
Exchange Membrane

Catalyst-coated proton exchange membrane for hydrogen production with high pressure water electrolysis

2021 ◽  
Vol 119 (12) ◽  
pp. 123903
Author(s):  
Xinrong Zhang ◽  
Wei Zhang ◽  
Weijing Yang ◽  
Wen Liu ◽  
Fanqi Min ◽  
...  
Keyword(s):  
High Pressure ◽  
Hydrogen Production ◽  
Proton Exchange Membrane ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Pressure Water ◽  
Exchange Membrane

scholarly journals Faraday’s Efficiency Modeling of a Proton Exchange Membrane Electrolyzer Based on Experimental Data

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4792 ◽  
Author(s):  
Burin Yodwong ◽  
Damien Guilbert ◽  
Matheepot Phattanasak ◽  
Wattana Kaewmanee ◽  
Melika Hinaje ◽  
...  
Keyword(s):  
High Pressure ◽  
Hydrogen Pressure ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Gas Pressure ◽  
Operating Conditions ◽  
Mechanical Resistance ◽  
Pem Electrolyzer ◽  
Hydrogen Crossover ◽  
Exchange Membrane

In electrolyzers, Faraday’s efficiency is a relevant parameter to assess the amount of hydrogen generated according to the input energy and energy efficiency. Faraday’s efficiency expresses the faradaic losses due to the gas crossover current. The thickness of the membrane and operating conditions (i.e., temperature, gas pressure) may affect the Faraday’s efficiency. The developed models in the literature are mainly focused on alkaline electrolyzers and based on the current and temperature change. However, the modeling of the effect of gas pressure on Faraday’s efficiency remains a major concern. In proton exchange membrane (PEM) electrolyzers, the thickness of the used membranes is very thin, enabling decreasing ohmic losses and the membrane to operate at high pressure because of its high mechanical resistance. Nowadays, high-pressure hydrogen production is mandatory to make its storage easier and to avoid the use of an external compressor. However, when increasing the hydrogen pressure, the hydrogen crossover currents rise, particularly at low current densities. Therefore, faradaic losses due to the hydrogen crossover increase. In this article, experiments are performed on a commercial PEM electrolyzer to investigate Faraday’s efficiency based on the current and hydrogen pressure change. The obtained results have allowed modeling the effects of Faraday’s efficiency by a simple empirical model valid for the studied PEM electrolyzer stack. The comparison between the experiments and the model shows very good accuracy in replicating Faraday’s efficiency.

Study Effect of Stress in the Electrical Contact Resistance of Bipolar Plate and Membrane Electrode Assembly in Proton Exchange Membrane Fuel Cell: A Review

2010 ◽  
Vol 447-448 ◽  
pp. 775-779 ◽  
Author(s):  
Kurniawan Miftah ◽  
Wan Ramli Wan Daud ◽  
Edy Herianto Majlan
Keyword(s):  
High Pressure ◽  
Contact Resistance ◽  
Proton Exchange Membrane ◽  
Electrical Contact ◽  
Membrane Electrode Assembly ◽  
Bipolar Plate ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Electrical Contact Resistance ◽  
Exchange Membrane

Stress applying in the stack of Proton Exchange Membrane Fuel Cell (PEMFC) effects the performance of PEMFC. High pressure in the Membrane Electrode Assembly (MEA) can reduce electrical contact resistance between bipolar plate and MEA. Nevertheless, too high pressure in the PEMFC can destroy MEA. Performance of PEMFC can be optimized by make proportional stress in the assembly of PEMFC. Finite element analysis (FEA) is one of method that can be used for analysis of stress in the PEMFC stack. However, setting of parameter in the analysis using FEA still became one of problem if realistic result must be desired. This paper reports setting of parameters in the stress analysis of PEMFC assembly using FEA method and study relationship of stress analysis with electrical contact resistance.

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