scholarly journals Compact Heat Exchange Reformer Used for High Temperature Fuel Cell Systems

10.5772/32865 ◽  
2012 ◽  
Author(s):  
Huisheng Zhang ◽  
Shilie Weng ◽  
Ming Su
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Heat Exchange ◽  
Cell Systems

Performance research on the compact heat exchange reformer used for high temperature fuel cell systems

2008 ◽  
Vol 183 (1) ◽  
pp. 282-294 ◽  
Author(s):  
Huisheng Zhang ◽  
Lijin Wang ◽  
Shilie Weng ◽  
Ming Su
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Heat Exchange ◽  
Cell Systems ◽  
Performance Research

Assessment of the Potential of Combined Micro Gas Turbine and High Temperature Fuel Cell Systems

2002 ◽  
Author(s):  
Dieter Bohn ◽  
Nathalie Po¨ppe ◽  
Joachim Lepers
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Advanced Materials ◽  
Cell Systems ◽  
Micro Gas Turbine ◽  
Technological Assessment

The present paper reports a detailed technological assessment of two concepts of integrated micro gas turbine and high temperature (SOFC) fuel cell systems. The first concept is the coupling of micro gas turbines and fuel cells with heat exchangers, maximising availability of each component by the option for easy stand-alone operation. The second concept considers a direct coupling of both components and a pressurised operation of the fuel cell, yielding additional efficiency augmentation. Based on state-of-the-art technology of micro gas turbines and solid oxide fuel cells, the paper analyses effects of advanced cycle parameters based on future material improvements on the performance of 300–400 kW combined micro gas turbine and fuel cell power plants. Results show a major potential for future increase of net efficiencies of such power plants utilising advanced materials yet to be developed. For small sized plants under consideration, potential net efficiencies around 70% were determined. This implies possible power-to-heat-ratios around 9.1 being a basis for efficient utilisation of this technology in decentralised CHP applications.

The Thermodynamic Evaluation and Optimization of Fuel Cell Systems

2006 ◽  
Vol 3 (2) ◽  
pp. 155-164 ◽  
Author(s):  
N. Woudstra ◽  
T. P. van der Stelt ◽  
K. Hemmes
Keyword(s):  
Heat Transfer ◽  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Energy Conversion ◽  
System Optimization ◽  
Fuel Conversion ◽  
Cell Systems ◽  
Electrochemical Conversion ◽  
Conversion Efficiencies

Energy conversion today is subject to high thermodynamic losses. About 50% to 90% of the exergy of primary fuels is lost during conversion into power or heat. The fast increasing world energy demand makes a further increase of conversion efficiencies inevitable. The substantial thermodynamic losses (exergy losses of 20% to 30%) of thermal fuel conversion will limit future improvements of power plant efficiencies. Electrochemical conversion of fuel enables fuel conversion with minimum losses. Various fuel cell systems have been investigated at the Delft University of Technology during the past 20 years. It appeared that exergy analyses can be very helpful in understanding the extent and causes of thermodynamic losses in fuel cell systems. More than 50% of the losses in high temperature fuel cell (molten carbonate fuel cell and solid oxide fuel cell) systems can be caused by heat transfer. Therefore system optimization must focus on reducing the need for heat transfer as well as improving the conditions for the unavoidable heat transfer. Various options for reducing the need for heat transfer are discussed in this paper. High temperature fuel cells, eventually integrated into gas turbine processes, can replace the combustion process in future power plants. High temperature fuel cells will be necessary to obtain conversion efficiencies up to 80% in the case of large scale electricity production in the future. The introduction of fuel cells is considered to be a first step in the integration of electrochemical conversion in future energy conversion systems.

scholarly journals Optimized High Temperature PEM Fuel Cell & High Pressure PEM Electrolyser for Regenerative Fuel Cell Systems in GEO Telecommunication Satellites

2017 ◽  
Vol 16 ◽  
pp. 10004
Author(s):  
Jarle Farnes ◽  
Dmitry Bokach ◽  
Sander ten Hoopen ◽  
Kim Skåtun ◽  
Max Schautz ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Cell Systems ◽  
Regenerative Fuel Cell ◽  
High Temperature Pem

High Temperature PEM Fuel Cell Systems, Control and Diagnostics

2016 ◽  
pp. 459-486 ◽  
Author(s):  
Søren Juhl Andreasen ◽  
Søren Knudsen Kær ◽  
Kristian Kjær Justesen ◽  
Simon Lennart Sahlin
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Cell Systems ◽  
Systems Control ◽  
High Temperature Pem

scholarly journals Review of Latest Developments in PEM Fuel Cell Research with Application to Hydrogen Powered Drones

2021 ◽  
Vol 19 ◽  
pp. 7-11
Author(s):  
B. Day ◽  
A. Pourmovahed ◽  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Low Temperature ◽  
Energy Content ◽  
Pem Fuel Cell ◽  
Pem Fuel Cells ◽  
Cell Systems ◽  
Cell Technology ◽  
Current State

Fuel cells are becoming an increasingly more enticing option to power drones for extended use applications. This is because under certain conditions, fuel cell systems are able to more efficiently store fuel and, therefore, energy compared to standard battery options. This reality has been proven through multiple research efforts and is reviewed in this paper. It is necessary to review the current state of PEM fuel cell technology for drone applications to determine the extent of its limitations and feasibility. For this reason, the latest developments in low temperature and high temperature PEM fuel cells were studied including their limitations and sensitivity to contamination with a focus on drone applications. It has been reported that hydrogen powered fuel cell systems are more efficient than conventional battery applications when the energy content is higher than 4 MJ. A hybrid fuel cell and battery powertrain is preferred for the purpose of counterbalancing the deficiencies of both individual cases. Currently available products were explored, and it was found that there are fuel cell systems available that are capable of powering drones in excess of 23 kg (50 lb).

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