PhD defence by Saeed S. Lafmejani on Experimental and Numerical Analysis of Gas - Liquid Flow in PEM Water Electrolysis
09.05.2019 kl. 13.00 - 16.00
Saeed Sadeghi Lafmejani, Department of Energy Technology, will defend the thesis "Experimental and Numerical Analysis of Gas - Liquid Flow in PEM Water Electrolysis".
Experimental and Numerical Analysis of Gas - Liquid Flow in PEM Water Electrolysis
Saeed Sadeghi Lafmejani
Professor Søren Knudsen Kær
Associate Professor Mads Pagh Nielsen
Associate Professor Matthias Mandø, Dept. of Energy Technology, Aalborg University Esbjerg (Chairman)
Dr. Felix Büchi, Paul Scherrer Institute, Switzerland
Dr. Uwe Reimer, Forschungszentrum Jülich, Germany
As the share of renewable energy in the electricity grid increases, the necessity of a set of storage systems intensifies. Existing power plants currently follow demand for electricity, meaning that they generate the amount of electricity that consumers need (grid balancing). Adhering to the same grid balancing method becomes challenging when more renewable energy sources such as wind and solar are involved. Hydrogen production and storage of the surplus of renewable energy has received increasing attention in recent years. Among different hydrogen generation technologies, proton exchange membrane (PEM) water electrolysers are highly responsive; therefore, they can effectively stabilise the electricity grid. Improving their cell performance to operate at high current densities prepares the technology for large scale hydrogen production. This entails a greater understanding of the various phenomena occurring in the cell. This study first focuses on the numerical simulation of the gas---liquid flow in the anode channel and porous transport layer. To validate the CFD simulation, two types of experimental facilities were designed and constructed. One focused on the fluid mechanics in the channel, and another included the electrochemical reactions. Ultimately, expanded metal mesh was tested to measure the pressure loss and visualise the flow of air and water along the mesh flow field at different orientations.
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ALL ARE WELCOME. THE DEFENCE WILL BE IN ENGLISH.
AFTER THE DEFENCE THERE WILL BE AN INFORMAL RECEPTION AT PONTOPPIDANSTRAEDE 111 IN ThE COFFEE ROOM.
Department of Energy Technology
Pontoppidanstræde 111, auditorium 1.177