scholarly journals Dynamics of low-pressure and high-pressure fuel cell air supply systems

2004 ◽  
Author(s):  
S. Gelfi ◽  
A.G. Stefanopoulou ◽  
J.T. Pukrushpan ◽  
Huei Peng
Keyword(s):  
High Pressure ◽  
Fuel Cell ◽  
Low Pressure ◽  
Air Supply ◽  
Supply Systems

A Comparison of High-Pressure and Low-Pressure Operation of PEM Fuel Cell Systems

2001 ◽  
Author(s):  
Joshua M. Cunningham ◽  
Myron A. Hoffman ◽  
David J. Friedman
Keyword(s):  
High Pressure ◽  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Low Pressure ◽  
Cell Systems

Comparative Study of Different Air Supply Systems for Automotive Fuel Cell Applications

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Florian Uhrig ◽  
Mario Schinnerl ◽  
Peter Haluska ◽  
Peter Kurzweil ◽  
Thomas von Unwerth
Keyword(s):  
Fuel Cell ◽  
Comparative Study ◽  
Automotive Fuel ◽  
Air Supply ◽  
Supply Systems

Comparative Investigation on Waste Heat Driven Air Supply Systems for PEM Fuel Cells

2016 ◽  
Author(s):  
Lili Yu ◽  
Weilin Zhuge ◽  
Yangjun Zhang ◽  
Jie Peng
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Waste Heat ◽  
Pem Fuel Cell ◽  
Pem Fuel Cells ◽  
Stoichiometric Ratio ◽  
Exhaust Gas ◽  
Supply Pressure ◽  
Air Supply ◽  
Supply Systems

The air supply system plays a key role for Proton Exchange Membrane (PEM) fuel cells. The performance of PEM fuel cells can be significantly improved by increasing the air supply pressure and air stoichiometric ratio. However, the increased electrical power consumption of the conventional motor driven air compressor operated at higher pressure would reduce the overall efficiency of the PEM fuel cell system. This paper proposes three novel air supply systems in which the compressor is driven by the waste heat recovered by the Organic Rankine Cycle (ORC) from the stack cooling water and the exhaust gas. The influences of air supply pressure and air stoichiometric ratio on the PEM fuel cell performance and exhaust gas are investigated through the fuel cell stack model. The performance analysis of the air supply system is carried out using a thermodynamic simulation model. And the proposed three air systems are compared to an air system driven by the exhaust gas and the assisted motor. Results show that both the air pressure and air stoichiometric ratio are improved significantly. The gross output electric power and the net efficiency of the PEM fuel cells are also improved greatly because of higher operating pressure and the elimination of the compressor power consumption. Among the 3 proposed air systems, the air system which has a self-circulation to maintain the stack temperature has the best performance and is most stable in operation.

Fouling Is the Beginning: Upcycling Biopolymer-Fouled Substrates for Fabricating High-Permeance Thin-Film Composite Polyamide Membranes

2020 ◽  
Author(s):  
Ruobin Dai ◽  
Hongyi Han ◽  
Tianlin Wang ◽  
Jiayi Li ◽  
Chuyang Y. Tang ◽  
...  
Keyword(s):  
Thin Film ◽  
High Pressure ◽  
End Of Life ◽  
Water Purification ◽  
Low Pressure ◽  
Polymeric Membranes ◽  
Membrane Recycling ◽  
Film Composite ◽  
Thin Film Composite ◽  
First Time

Commercial polymeric membranes are generally recognized to have low sustainability as membranes need to be replaced and abandoned after reaching the end of their life. At present, only techniques for downcycling end-of-life high-pressure membranes are available. For the first time, this study paves the way for upcycling fouled/end-of-life low-pressure membranes to fabricate new high-pressure membranes for water purification, forming a closed eco-loop of membrane recycling with significantly improved sustainability.

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