Development of Solid Oxide Fuel Cells at Versa Power Systems and FuelCell Energy

2015 ◽  
Vol 68 (1) ◽  
pp. 89-94 ◽  
Author(s):  
B. P. Borglum ◽  
H. Ghezel-Ayagh
Keyword(s):  
Fuel Cells ◽  
Power Systems ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel

scholarly journals Modelling of Physical, Chemical, and Material Properties of Solid Oxide Fuel Cells

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Jakub Kupecki
Keyword(s):  
Fuel Cells ◽  
Power Systems ◽  
Solid Oxide Fuel Cells ◽  
Material Properties ◽  
3D Models ◽  
Solid Oxide ◽  
System Level ◽  
Oxide Fuel ◽  
Physical Chemical ◽  
Modelling Techniques

This paper provides a review of modelling techniques applicable for system-level studies to account for physical, chemical, and material properties of solid oxide fuel cells. Functionality of 0D to 3D models is discussed and selected examples are given. Author provides information on typical length scales in evaluation of power systems with solid oxide fuel cells. In each section, proper examples of previous studies done in the field of 0D–3D modelling are recalled and discussed.

Quantification of the Improvement of Performance of Solid Oxide Fuel Cell Using Chiller-Based Fuel Recirculation

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Jakub Kupecki ◽  
Konrad Motylinski ◽  
Lukasz Szablowski ◽  
Agnieszka Zurawska ◽  
Yevgeniy Naumovich ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Power Systems ◽  
Solid Oxide Fuel Cells ◽  
Complete Removal ◽  
External Source ◽  
Operating Conditions ◽  
Solid Oxide ◽  
Processing Unit ◽  
Oxide Fuel ◽  
Hydrogen Molecules

Abstract Solid oxide fuel cells operate at high temperature, typically in the range 650–850 °C, utilizing between 50% and 75% of fuel. The remaining fuel can be either burned in a post-combustor located downstream of the solid oxide fuel cells (SOFC) stack or partially recycled. Several of the SOFC-based power systems include recirculation which is used to supply the steam to the fuel processing unit based on steam reforming. In such a system, the recycled stream makes it possible to eliminate the supply of water from the external source. In the same time, recirculation aids in increasing the overall fuel utilization in the power system. As a result the efficiency increases by 5–12% points. The electrochemical reaction in SOFC generates a substantial amount of water by combining the hydrogen molecules with oxygen extracted from the air entering the cathodic compartments. The recycled stream contains water vapor which is circulated in the recycled loop. In the current analysis, the system for recirculation of the anodic off-gas with complete removal of water was proposed and studied. Performance of a planar cell operated with different rates of recycling was studied using the experimental setup with chiller-based recirculation. Quantification of the improvement of the efficiency was based on the analysis of the increase of voltage of cell operated at a given current density. The experimental study demonstrated that the performance of a stand-alone SOFC can be increased by 18–31%. Additionally, the numerical model was proposed to determine the performance in other operating conditions.

Development of Solid Oxide Fuel Cells at Versa Power Systems & FuelCell Energy

2016 ◽  
Vol 72 (7) ◽  
pp. 3-9
Author(s):  
A. Torabi ◽  
J. Barton ◽  
C. Willman ◽  
H. Ghezel-Ayagh ◽  
E. Tang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Power Systems ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel

scholarly journals Mathematical model of a plate fin heat exchanger operating under solid oxide fuel cell working conditions

2013 ◽  
Vol 34 (4) ◽  
pp. 3-21 ◽  
Author(s):  
Jakub Kupecki ◽  
Krzysztof Badyda
Keyword(s):  
Mathematical Model ◽  
Fuel Cells ◽  
Heat Exchanger ◽  
Power Systems ◽  
Solid Oxide Fuel Cells ◽  
Heat Exchangers ◽  
Operating Conditions ◽  
Solid Oxide ◽  
System Level ◽  
Oxide Fuel

Abstract Heat exchangers of different types find application in power systems based on solid oxide fuel cells (SOFC). Compact plate fin heat exchangers are typically found to perfectly fit systems with power output under 5 kWel. Micro-combined heat and power (micro-CHP) units with solid oxide fuel cells can exhibit high electrical and overall efficiencies, exceeding 85%, respectively. These values can be achieved only when high thermal integration of a system is assured. Selection and sizing of heat exchangers play a crucial role and should be done with caution. Moreover, performance of heat exchangers under variable operating conditions can strongly influence efficiency of the complete system. For that reason, it becomes important to develop high fidelity mathematical models allowing evaluation of heat exchangers under modified operating conditions, in high temperature regimes. Prediction of pressure and temperatures drops at the exit of cold and hot sides are important for system-level studies. Paper presents dedicated mathematical model used for evaluation of a plate fin heat exchanger, operating as a part of micro-CHP unit with solid oxide fuel cells.

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