Investigations of solid oxide fuel cells with functionally graded electrodes for high performance and safe thermal stress

Sadgal, Mohammed; Ahmed, Khaled; Ahmed, Mahmoud; Nemat-Alla, M.; El-Sebaie, M.G.

doi:10.1016/j.ijhydene.2017.05.071

Cited by 33 publications

(14 citation statements)

References 38 publications

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“…The results of mesh independency are presented in Table 2, from which it was noticed that mesh of 304,000 cells led to a reasonable agreement when compared to the numerical results of [37]. For more details about the mesh independency, refer to [34,38,39]. Once the computational mesh was created, it must be imported into the solver ANSYS FLUENT 18.1.…”

Section: Methodsmentioning

confidence: 84%

Performance analysis of AS-SOFC fuel cell combining single and sinusoidal flow field: numerical study

Horr

Mohcene

Bouguettaia

et al. 2021

Renew. Energy Environ. Sustain.

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The performance of a solid oxide fuel cell (SOFC) was examined using 3D computational fluid dynamics to model mass and heat flows inside the channels. In the present investigation, a SOFC fuel cell with a new flow field based on a sinusoidal flow has been studied. The latter was tested and compared with a single flow using ANSYS FLUENT. The obtained results showed that at a given operating voltage, the maximum power for the sinusoidal and the single flow fields were 1.43 and 1.35 W/cm2, respectively. By taking in addition, into account the concentration, activation and Ohmic losses; it was noticed that the distribution of velocity and temperature for the sinusoidal flow led to bettered results. Furthermore, it was observed that the maximum use of H2 mass fraction consumed in sinusoidal and single flow field designs were 60% and 55% respectively. Similarly, the highest H2O mass fraction values produced for the sinusoidal and single flow designs were 42% and 34% respectively. This model was validated and confronted to previous data. The present results agree well with reported studies in literature.

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Section: Methodsmentioning

confidence: 84%

Performance analysis of AS-SOFC fuel cell combining single and sinusoidal flow field: numerical study

Horr

Mohcene

Bouguettaia

et al. 2021

Renew. Energy Environ. Sustain.

View full text Add to dashboard Cite

show abstract

“…In recent years, the energy manufacturers have been seeking diverse types of the FGMs, in order to improve the performance and efficiency of some of their devices. The FGMs have been strongly used in the energy field [214][215][216][217] including piezoelectric FGMs for the ultrasonic transducers, actuators, damping materials, energy absorption, energy harvesting, thermoelectric converter for energy conversion, solar panels, solar cells, fuel cells, turbine blade coatings and the graded electrode for the production of solid oxide fuels cells [71,213,[218][219][220][221][222][223][224][225][226][227][228][229][230][231][232][233][234][235][236]. Cano et al [218] have studied the growth of hybrid III-V/SiGe solar cells on Si substrates through reverse graded buffers.…”

Section: Energymentioning

confidence: 99%

Functionally graded materials (FGMs): A review of classifications, fabrication methods and their applications

Mohammadi

Rajabi

Ghadiri

2021

PAC

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Functionally graded materials (FGMs) are new materials whose properties change gradually in respect to their dimensions. This group of materials shows a tremendous improvement of previously used composite materials. FGM consists of two or more materials whose combination enables the achievement of specified properties in accordance with the desired application. The article gives an overview of different classifications, various fabrication methods and applications of the FGMs. It could also provide insight and perspective for researchers, university students and research and development teams since it has brought together diverse aspects of FGMs. As mentioned in section two, we took all FGMs fabrication methods under consideration, giving the reader an insight into how to make a product while satisfying the conditions of financial and mechanical efficiency. The classification section specifically goes over structures, types of gradients, sizes/scales, state of matter and finishes with the manufacturing processes. Section two deep dives into the fabrication methods used in the FGMs, which are divided into three sub-sections, including gas-based, liquid-based and solid-based. Lastly, various applications of the FGMs in different fields and industries, namely aerospace, energy, medicine, military, manufacturing and eventually other applications, are demonstrated.

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“…Renewable energy resources are the key solution to the coming energy shortage that the world faces. As a promising renewable energy source, fuel cells can produce electricity through the electrochemical energy stored in hydrocarbons through electrochemical reactions between hydrogen and oxygen [1][2][3]. Solid oxide fuel cells (SOFC) are fuel cells that have high power densities.…”

Section: Introductionmentioning

confidence: 99%

Developing a Novel Design for a Tubular Solid Oxide Fuel Cell Current Collector

Ahmed

2022

Applied Sciences

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This study presents a novel current collector design for a tubular SOFC and numerically investigates its performance. The new current collector design has a flow channel with a trapezoidal shape. Several channels, such as four, eight, and twelve, are investigated, and their effects on cell performance are reported and compared. Additionally, a traditional tubular SOFC and the newly developed design are presented. The equations of mass conservation, momentum, charge transport, and energy were considered in the numerical model, and the ANSYS Fluent SOFC module was used to solve the numerical model. The results show that the developed design performed better than the traditional design. The new design with twelve channels collected 0.384 A, higher than the other designs. Although the design with twelve channels gave a high concentration of hydrogen at the outlet compared to the designs with four and eight channels, it gave higher performance than the designs with four and eight channels. Increasing the number of channels in the developed design enhanced the cell performance significantly due to the increased contact area, leading to the efficient collection of the generated current.

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Investigations of solid oxide fuel cells with functionally graded electrodes for high performance and safe thermal stress

Cited by 33 publications

References 38 publications

Performance analysis of AS-SOFC fuel cell combining single and sinusoidal flow field: numerical study

Performance analysis of AS-SOFC fuel cell combining single and sinusoidal flow field: numerical study

Functionally graded materials (FGMs): A review of classifications, fabrication methods and their applications

Developing a Novel Design for a Tubular Solid Oxide Fuel Cell Current Collector

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