Optimization strategies for Solid Oxide Fuel Cell (SOFC) application: A literature survey

Ramadhani, Farah; Hussain, Mohd Azlan; Mokhlis, Hazlie; Hajimolana, S.A.

doi:10.1016/j.rser.2017.03.052

Cited by 244 publications

(75 citation statements)

References 180 publications

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“…It is well‐known that BZCY‐type electrolyte requires very high calcination temperature due to their poor sinterability , , . In turn, poor sinterability causes the electrolytes to show low density and a high number of poorly conductive grain boundaries.…”

Section: Resultsmentioning

confidence: 99%

“…In order to further enhance the output of MT-SOFCs, novel process should be developed to suppress the barium loss during thin electrolyte membrane fabrication. It is well-known that BZCY-type electrolyte requires very high calcination temperature due to their poor sinterability [9,21,22]. In turn, poor sinterability causes the electrolytes to show low density and a high number of poorly conductive grain boundaries.…”

Section: Cell Morphological Propertiesmentioning

confidence: 99%

“…However, the conductivity decreased rapidly with increasing temperature above 800°C, making it unsuitable for practical applications for intermediate temperature solid oxide fuel cells (IT-SOFCs) [4][5][6][7]. Currently, numerous research has been focused on new materials as electrode and electrolyte for IT-SOFCs [8][9][10][11]. One of the most promising technologies is the proton conducting SOFCs, which adopted the solid oxide proton conductors, having lower activation energy ( 0.4-0.6 eV [12] vs. 1.1 eV [13]), and higher conductivity compared with conventional oxide ion counterparts at intermediate temperature range [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

et al. 2019

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Anode‐supported micro‐tubular SOFCs based on a proton and oxide ion mixed conductor electrolyte, BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb), have been successfully fabricated via phase‐inversion process. Typical micro‐tubular cell with the configuration of Ni‐BZCYYb|BZCYYb|La0.6Sr0.4Co0.2Fe0.8O3–δ, consists of anode support, electrolyte and cathode with thicknesses of 200, 12, and 10 μm, respectively. The cells show excellent electrochemical performance with the peak power densities of 1.040, 0.902, 0.721, and 0.590 W cm−2 at 750, 700, 650, and 600 °C, respectively, with humidified (3 vol.% H2O) hydrogen as fuel and ambient air as oxidant. The AC impedance spectroscopy result shows low concentration polarization values of 0.016–0.021 Ω cm2 at 750–600 °C. Further, significant performance enhancement is observed during long‐term stability test at 600 and 750 °C under constant voltage of 0.5 and 0.7 V over 120 h, respectively, indicating excellent stability of BZCYYb under fuel cell operating condition. The high performance is attributed to high‐quality cell, validated by the dense, crack‐free BZCYYb electrolyte film supported by the anode with micro sponge‐like pores.

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Section: Resultsmentioning

confidence: 99%

Section: Cell Morphological Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

et al. 2019

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“…(23) is only valid as long as the current density is higher than the exchange current density, see [2,3]. Accordingly, the current density can be worked out as:…”

Section: Application Of Exergy 70mentioning

confidence: 99%

“…A fuel cell is considered as a highly efficient, environmentally friendly device to generate affordable energy [1,2]. It is well-known that a solid oxide fuel cell converts the chemical energy of a fuel into electrical energy by means of an electrochemical reaction at high operating temperatures (600-1000 C).…”

Section: Introductionmentioning

confidence: 99%

Advanced Exergy Analysis of an Integrated SOFC-Adsorption Refrigeration Power System

Rangel-Hernández¹,

Niño-Avendaño²,

Ramírez-Minguela³

et al. 2018

Application of Exergy

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In this chapter, an exergy analysis applied to a solid oxide fuel cell (SOFC)/vapor adsorption refrigeration (VAR) system is presented. The influences of four significant parameters (current density, inlet fuel temperature, fuel utilization and steam-to-carbon ratio) on the exergy efficiency of both the SOFC stack and the SOFC-VAR system are investigated. In order to do so, a mathematical model is constructed in Engineering Equation Solver (EES) software to generate the simulations. The analysis shows that the calculated exergy efficiency is around 8% lower than the energy efficiency for both cases. Moreover, it is found that most of the causes of irreversibilities in the system are due to electronic and ionic conduction in the components. It is also shown that the exergy efficiency is substantially sensitive to fuel inlet temperature, which is evidenced by a bending-over behavior. Finally, in accordance with the calculated efficiency defects, the main exergy destructions are present in the heat exchangers, the SOFC, the afterburner and the generator.

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Efficient control of a nonlinear solid oxide fuel cell system using an adaptive model predictive controller

Gupta

Pahwa

Verma

2021

Int Trans Electr Energ Syst

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Summary Over the years, the solid oxide fuel cell (SOFC) is growing commercially due to its high fuel flexibility, lesser maintenance requirement, and environmental friendliness feature. However, its control is challenging due to its nonlinear behavior and simultaneous management of its operational constraints. Therefore, in this work, an adaptive model predictive control is designed systematically to handle the SOFC's behavior while optimizing its operational constraints such as fuel input, utilization factor, and change in pressure of hydrogen and oxygen. This model‐oriented control linearizes, augments, and discretizes the SOFC during run time while estimating the states using a time‐varying Kalman filter. Finally, it optimizes the control problem for predicting the internal states of the SOFC using successive linearization. The simulation results show that the proposed controller gives better performance of the SOFC in linear region, and significantly improved performance in nonlinear region in comparison to the conventional model predictive controller. The validation of the work has been done through real‐time simulation using OPAL‐RT's hardware setup. Using such control is beneficial as it enhances the efficiency of the SOFC significantly. Thus, this advanced controller is most suited for these kinds of nonlinear systems due to its superior performance.

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Optimization strategies for Solid Oxide Fuel Cell (SOFC) application: A literature survey

Cited by 244 publications

References 180 publications

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

Advanced Exergy Analysis of an Integrated SOFC-Adsorption Refrigeration Power System

Efficient control of a nonlinear solid oxide fuel cell system using an adaptive model predictive controller

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Optimization strategies for Solid Oxide Fuel Cell (SOFC) application: A literature survey

Cited by 244 publications

References 180 publications

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr0.1Ce0.7Y0.1Yb0.1O3−δ Proton Conducting Electrolyte

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr0.1Ce0.7Y0.1Yb0.1O3−δ Proton Conducting Electrolyte

Advanced Exergy Analysis of an Integrated SOFC-Adsorption Refrigeration Power System

Efficient control of a nonlinear solid oxide fuel cell system using an adaptive model predictive controller

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Product

Resources

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Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro‐tubular IT‐SOFCs with Novel Asymmetric Structure Based on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O₃₋_δ Proton Conducting Electrolyte