alternativeАльтернативная энергетика и экология (ISJAEE)Alternative Energy and Ecology (ISJAEE)1608-8298Международный издательский дом научной периодики "Спейс10.15518/isjaee.2017.22-24.110-120alternative-1200Research ArticleВОДОРОДНАЯ ЭКОНОМИКАHYDROGEN ECONOMYМИКРОУРОВНЕВЫЙ ДВУМЕРНЫЙ ТЕРМИЧЕСКИЙ АНАЛИЗ И АНАЛИЗ НАПРЯЖЕНИЙ НА ГРАНИЦЕ РАЗДЕЛА АНОД – ЭЛЕКТРОЛИТ ТВЕРДООКСИДНОГО ТОПЛИВНОГО ЭЛЕМЕНТАMICRO LEVEL TWO DIMENSIONAL STRESS AND THERMAL ANALYSIS ANODE/ELECTROLYTE INTERFACE OF A SOLID OXIDE FUEL CELLЧеликС.CelikS.

кафедра машиностроения

Mechanical Engineering Department

scelik@nigde.edu.trИбрахимоглуБ.IbrahimogluB.

кафедра машиностроения

Mechanical Engineering Department

scelik@nigde.edu.trМатМ. Д.MatM. D.

кафедра машиностроения

Mechanical Engineering Department

scelik@nigde.edu.trКапланЮ.KaplanYu.

кафедра машиностроения

Mechanical Engineering Department

scelik@nigde.edu.trВезироглуТ. Н.VezirogluT. N.

д-р наук (теплообмен), профессор, президент Международной ассоциации водородной энергетики

Ph.D. in Heat Transfer, Professor, President of International Association for Hydrogen Energy

scelik@nigde.edu.trУниверситет НигдеТурцияNigde UniversityTurkeyУниверситет Абдуллы ГюляТурцияAbdullah Gul UniversityTurkeyУниверситет МеликшахТурция3Meliksah UniversityTurkeyМеждународное партнерство по водородной экономикеСоединённые Штаты АмерикиInternational Association for Hydrogen Energy, Miami UniversityUnited States201704012018022-24110120Copyright © Международный издательский дом научной периодики "Спейс, 20182018Международный издательский дом научной периодики "СпейсМеждународный издательский дом научной периодики "Спейсhttps://www.isjaee.com/jour/about/submissions#copyrightNoticehttps://www.isjaee.com/jour/article/view/1200

Расслоение и деградация рабочих характеристик поверхности раздела электрод/электролит твердооксидных топливных элементов (ТОТЭ) можно определить путем вычисления напряжений, генерируемых в разных слоях ячейки. В макроскопических математических моделях напряжения, возникшие в ТОТЭ, обычно считаются однородными по всему поперечному сечению. Однако в процессе функционирования этих композиционных материалов фактические напряжения в многофазных пористых слоях могут сильно отличаться от значений на макроуровне. Следовательно, для точной оценки фактических напряжений и функционирования ТОТЭ требуется микроуровневое моделирование. В статье приведена микроструктурная характеристика пористого анода/электролита ТОТЭ, а также двумерные механический и электрохимический анализы для изучения напряжения и перенапряжения. Микро-структура определялась томографией при помощи фокусированного ионного пучка, а полученные микро- структуры использовались для образования твердой сетки из двумерных трехгранных элементов. Для расчета главного напряжения и соотношения Стефана – Максвелла использовался пакет моделирования COMSOL Multiphysics. Поле напряжений рассчитано в диапазоне от комнатной до рабочей температуры, а перенапряжение – при рабочей температуре.

 

The delamination and degradation of solid oxide fuel cells (SOFCs) electrode/electrolyte interface is estimated by calculating the stresses generated within the different layers of the cell. The stresses developed in a SOFC are usually assumed to be homogenous through a cross section in the mathematical models at macroscopic scales. However, during the operating of these composite materials the real stresses on the multiphase porous layers might be very different than those at macro-scale. Therefore micro-level modeling is needed for an accurate estimation of the real stresses and the performance of SOFC. This study combines the microstructural characterization of a porous solid oxide fuel cell anode/electrolyte with two dimensional mechanical and electrochemical ana yses to investigate the stress and the overpotential. The microstructure is determined by using focused ion beam (FIB) tomography and the resulting microstructures are used to generate a solid mesh of two dimensional triangular elements. COMSOL Multiphysics package is employed to calculate the principal stress and Maxwell Stefan Diffusion. The stress field is calculated from room temperature to operating temperature while the overpotential is calculated at operating temperature.

 

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The authors declare that there are no conflicts of interest present.