A transient analysis of a micro-tubular solid oxide fuel cell (SOFC)

Serincan, Mustafa Fazıl; Pasaogullari, Ugur; Sammes, Nigel M.

doi:10.1016/j.jpowsour.2009.06.036

Cited by 42 publications

(15 citation statements)

References 48 publications

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“…A major issue inhibiting transient SOFC operation is that thermal stresses during transient operation can increase the probability of failure and degradation of the fuel cell (e.g., see [11][12][13][14]). To minimize thermal stresses and the corresponding probability of failure, it is critical to minimize spatial temperature variations during SOFC operation.…”

Section: Introductionmentioning

confidence: 99%

Feedback control of solid oxide fuel cell spatial temperature variation

Fardadi

Mueller

Jabbari

2010

Journal of Power Sources

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Section: Introductionmentioning

confidence: 99%

Feedback control of solid oxide fuel cell spatial temperature variation

Fardadi

Mueller

Jabbari

2010

Journal of Power Sources

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“…Full descriptions of these expressions can be found in published works [50,35,[51][52][53][54]. The methodology used here has been previously used by others, including [18,32,33,36,[40][41][42][55][56][57][58], who have compared predictions to both cell and system level experimental data [18,33,40,41,59,60]. The model used here is based on conservation of mass, species, and energy, as well as equations of convective and conductive heat transfer, steam reformation reactions, momentum, and fuel cell electrochemistry.…”

Section: Fuel Cell Stackmentioning

confidence: 99%

Investigation of thermal control for different SOFC flow geometries

2016

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h i g h l i g h t s Thermal control of cross flow SOFC is investigated. Changing flow directions in a subset of channels can improve thermal profiles. Non uniform air flow improves thermal profile at the expense of small efficiency loss. Advanced controllers minimize thermal variations for large changes in power demand. a b s t r a c t A dynamic solid oxide fuel cell (SOFC) model is used to investigate the effects of different flow arrangements, as well as those of non-uniform air flow across channels, on temperature profile and thermal gradients under transient and steady state response. A high performance multi-input multi-output feedback controller has been developed to minimize SOFC spatial temperature variations during changes in power demands for different flow patterns. Numerical results show that the controller would result in negligible temperature variations for the modified cross-flow arrangement proposed here, even for large changes in the power drawn. The combination of a high performance controller and design modification results in a more uniform temperature profile at steady state nominal conditions, and modest variations in temperature profile, from the nominal, for ±15% change in power. Similarly, non-uniform air flow rate decreases the temperature gradient as well as maximum temperature across the cell, though its effect is less pronounced in the closed loop response.

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“…We utilize the thermal-fluid model we previously developed [23][24][25] and use the predicted temperature distribution in the mechanical analysis. The geometry of the previous model is extended to include the sealants that are applied between the electrolyte coating and the supporting alumina tubes as seen in Fig.…”

Section: Mathematical Modelmentioning

confidence: 99%