Numerical Investigation of thermal management of Solid Oxide Fuel Cells by flow arrangement

Şen, Fırat
Tarı, İlker
SolidOxide Fuel Cells (SOFCs) are electrochemical cells working at high temperatures. One of the important problems in planar SOFC designs is the non-uniformtemperature distribution on the plane of the cell due to the waste heat produced by electrochemical reactions. Another important problem of SOFCs is the low fuel utilization ratio. In this study, the effect of the flow arrangement on the temperature distribution, which causes the thermal stresses, and the method to increase the fuel utilization, is numerically investigated. An SOFC single cell experimental setup is developed with the cross-flow arrangement. This setup and experimental conditions are modelled with ANSYS Fluent. The cross-flow experimental results are used in order to validate and verify the model. The validated model is used as a reference to develop the models for different flow arrangements and to investigate the effect of the flow arrangement on the temperature distribution. The simulation results are compared, in order to determine the best flow arrangement. Additionally, by using the simulation results, a method to increase the SOFC fuel utilization is suggested.
Proceedings of CHT-15ICHMT International Symposium on Advances in Computational Heat TransferMay 25-29, 2015


Modeling of a high temperature PEM fuel cell
Sezgin, Berna; Eroğlu, İnci; Devrim, Yılser; Department of Chemical Engineering (2016)
High temperature polymer electrolyte membrane fuel cells (HT-PEMFC) are considered as the next generation of fuel cells since high temperature operation for PEM fuel cells has several advantages such as single phase operation, high carbon monoxide tolerance, low or zero carbon emission and removal of some equipment from the system. In order to obtain high performances, HT-PEMFC systems should be optimized in terms of dimensions, materials, operating conditions and other parameters. Modeling can help to pre-...
Designing heat exchanger with spatially variable surface area for passive cooling of PEM fuel cell
Ozden, Ender; Tolj, Ivan; Barbir, Frano (2013-03-01)
The purpose of this work was to design a heat exchanger for a Polymer Electrolyte Membrane (PEM) fuel cell, which would ensure such a temperature profile along the fuel cell cathode channel resulting in close to 100% relative humidity along the channel without external humidification. To achieve this, 3D numerical simulations of a single PEM fuel cell were performed using commercial Computational Fluid Dynamics (CFD) software (ANSYS Fluent). Based on the simulation results a variable surface area finned hea...
Numerical investigation of a stand alone solar hydrogen energy system effects of PEFC degradation
Ender, Ozden; Tarı, İlker (null; 2015-08-12)
An existing stand-alone solar energy system producing hydrogen for energy storage is numerically investigated focusing on the degradation of Polymer Electrolyte Fuel Cell (PEFC) and its effects on the overall performance of the system. The system consists of Photovoltaic (PV) panels, polymer electrolyte based electrolyzers, H2 and O2 storage tanks and a commercial PEFC stack. A PEFC is numerically investigated both as new and as degraded (for about two years). Using a variety of observed degradation pattern...
Numerical modeling and analyses of anisotropic diffusion and stresses in polymer electrolyte fuel cell
Mehrtash, Mehdi; Tarı, İlker; Department of Mechanical Engineering (2017)
A two dimensional, half-cell, non-isothermal, multi-phase model of a polymer electrolyte fuel cell (PEFC) is developed. The model accounts for the acting clamping force on the cell with accompanying effects on gas transport properties and contact resistances. Spatial variations of anisotropic structural and physical properties of gas diffusion layers (GDLs) in both in-plane and through-plane directions are considered. The developed mechanistic model is validated by comparıng its results with the experimenta...
Second law anlysis of solid oxide fuel cells
Bulut, Başar; Yamalı, Cemil; Yüncü, Hafit; Department of Mechanical Engineering (2003)
In this thesis, fuel cell systems are analysed thermodynamically and electrochemically. Thermodynamic relations are applied in order to determine the change of first law and second law efficiencies of the cells, and using the electrochemical relations, the irreversibilities occuring inside the cell are investigated. Following this general analysis, two simple solid oxide fuel cell systems are examined. The first system consists of a solid oxide unit cell with external reformer. The second law efficiency cal...
Citation Formats
F. Şen and İ. Tarı, “Numerical Investigation of thermal management of Solid Oxide Fuel Cells by flow arrangement,” presented at the Proceedings of CHT-15ICHMT International Symposium on Advances in Computational Heat TransferMay 25-29, 2015, Piscataway, USA, 2015, Accessed: 00, 2021. [Online]. Available: