Analysys of the performance a PEM-type electrolyzer in variable energy supply conditions
Journal Article
·
· Chemical Engineering Research and Design
- Universidad Nacional de Colombia, Medellin (Colombia); SEI Research Group, Sume Energy C S.A.S., Medellín (Colombia)
- Universidad Nacional de Colombia, Medellin (Colombia)
- Universidad Nacional de Colombia, Medellin (Colombia); CELSIA-Colombia, Medellín (Colombia)
- CELSIA-Colombia, Medellín (Colombia)
- National Renewable Energy Laboratory (NREL), Golden, CO (United States). Renewable Resources and Enabling Science Center
Here in this article, the main variables related to the performance of a proton exchange membrane-type electrolyzer are analyzed along with the risk of explosion for different operating conditions, notably when the electrolyzer works with a variable solar energy power supply and at high pressure. A novel mathematical model was developed that considers all mass transport phenomena through the membrane electrode assembly (MEA) for water, hydrogen, and oxygen, as well as the water evaporation in the anode and cathode channels. The main findings of this work are that for a solar energy supply operating at high pressure, the electrolyzer cannot function safely throughout the day, since in the hours when solar irradiation is lower, low current densities favor high hydrogen concentrations at the anode. Finally, it was found that greater thicknesses of the membrane increased the explosion risk due to the increase in the MEA temperature and therefore the hydrogen solubility.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1995462
- Report Number(s):
- NREL/JA--2800-87171; MainId:87946; UUID:6120e323-d4d8-4bfe-8af7-6a7e78080e1d; MainAdminID:70220
- Journal Information:
- Chemical Engineering Research and Design, Journal Name: Chemical Engineering Research and Design Vol. 196; ISSN 0263-8762
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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