Analysis of Different Configurations of Hybrid Fuel Cells System With Supercapacitors and Battery for Small Stationary Applications

2006 ◽  
Author(s):  
Stefano Cordiner ◽  
Francesco Pagliarini ◽  
Michele Prencipe ◽  
Fabio Romanelli
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte Fuel Cells ◽  
Uninterruptible Power Supply ◽  
Electric Power Grid ◽  
Start Up ◽  
Low Temperature Fuel Cells ◽  
Uninterruptible Power ◽  
Technical Solutions ◽  
Interesting Solution ◽  
Critical Aspects

The overall characteristics of electric power grid in terms of continuity of the supply and energy quality are of outmost importance for both industrial and civil applications with special attention to the uninterruptible ones. Net congestion problems are becoming more and more frequent boosting the development of small energy generation systems with back-up function. In this field low temperature fuel cells are an interesting solution addressing both environmental and efficiency issues. In the present work the application of Polymer Electrolyte Fuel Cells (PEFC) for an Uninterruptible Power Supply (UPS) system (<1kWe) is analysed by examining different possible technical solutions. This system is composed by a PEFC 1kWe stack, assisted by a set of battery and a supercapacitors pack, and using hydrogen stored into a metal hydride tank. Critical aspects as system start-up, response rapidity and autonomy are addressed to obtain an optimal configuration. Both numerical and experimental analysis have been carried out to characterize component behaviour. Once realized and tested, the system has proved to be able to work as UPS with an autonomy of 6.5 hours, only determined by hydrogen storage capability.

Investigation of the corrosion of carbon supports in polymer electrolyte fuel cells using simulated start-up/shutdown cycling

2013 ◽  
Vol 91 ◽  
pp. 195-207 ◽  
Author(s):  
Young-Chul Park ◽  
Katsuyoshi Kakinuma ◽  
Makoto Uchida ◽  
Donald A. Tryk ◽  
Takeo Kamino ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Carbon Supports ◽  
Start Up

Degradation Mapping of Polymer Electrolyte Fuel Cells During Start-Up/Shutdown Cycling

2021 ◽  
Author(s):  
Lara Rasha ◽  
Theo A. M. Suter ◽  
Tobias P. Neville ◽  
Paul R. Shearing ◽  
Dan J.L. Brett
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Start Up

One Dimensional Analysis of Subzero Start-Up for Polymer Electrolyte Fuel Cells

2019 ◽  
Vol 16 (2) ◽  
pp. 273-284 ◽  
Author(s):  
Jixin Chen ◽  
Yun Wang ◽  
Partha P. Mukherjee
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Dimensional Analysis ◽  
Polymer Electrolyte Fuel Cells ◽  
One Dimensional ◽  
Start Up

Start/Stop Induced Carbon Corrosion in Polymer Electrolyte Fuel Cells

2010 ◽  
Author(s):  
Nicolas Linse ◽  
Gu¨nther G. Scherer ◽  
Alexander Wokaun ◽  
Lorenz Gubler
Keyword(s):  
Fuel Cells ◽  
Corrosion Rate ◽  
Water Content ◽  
Polymer Electrolyte ◽  
Relative Water Content ◽  
Polymer Electrolyte Fuel Cells ◽  
Carbon Corrosion ◽  
Corrosion Rates ◽  
Start Up ◽  
Relative Water

The effect of different operating parameters on carbon corrosion in polymer electrolyte fuel cells was investigated by applying single triangular potential pulses to cells operated in H2/N2 mode. Corrosion rates were determined by integration of the resulting CO2 concentration peaks in the cathode exhaust gas. A significant effect of the lower voltage limit was observed which was attributed to a partial inhibition of the platinum catalyzed corrosion pathway through the formation of a stable oxide layer on the platinum surface. Humidity variation experiments showed a linear correlation between carbon corrosion rate and water vapor partial pressure. However, corrosion rate strongly decreased at low relative humidity, showing that both absolute and relative water content influence corrosion. Since the distinction between the influence of absolute and relative water content is not clear yet, interpretation of temperature effects is difficult. In case of fully humidified gases, corrosion rates showed an exponential-like increase with increasing temperature. In order to assess the relevance for real start-up and shut-down processes, carbon corrosion rates were compared to degradation data obtained in application oriented start/stop cycling experiments, which were carried out by alternating purging of the anode compartment with hydrogen and air. Generally, fuel cell performance loss rates are in good agreement with corrosion rates determined in potential pulse experiments. Due to the high complexity of real start-up and shut-down processes, however, potential pulse experiments can not provide an accurate prediction of start/stop induced degradation behavior.

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