Three-Dimensional Numerical Study of Overheating of Two Intermediate Temperature P-AS-SOFC Geometrical Configurations

Sahli, Youcef; Zitouni, Bariza; Hocine, Ben Moussa

doi:10.4018/978-1-7998-4945-2.ch008

Cited by 2 publications

(3 citation statements)

References 48 publications

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“…This proved that fire scenario is one of the most credible hazard scenarios for SOFC system. This findings are supported by [22] where this recent studies indicated that overheating occur in SOFC stack are due to disruption of air flow or malfunction of temperature controller that causes higher temperature which led to overheating and eventually may lead to fire. On the other hand, Fig.…”

Section: Sensitivity Analysissupporting

confidence: 53%

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Dynamic Hazard Identification on Solid Oxide Fuel Cell system using Bayesian Networks

Shamsuddin

Muchtar

Nordin

et al. 2022

IJIE

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Accidents are expected when operating Solid Oxide Fuel Cell (SOFC) unit system in a plant due to its complexity and operating conditions. SOFC system which consists of risky components such as combustor, reformer, heaters and SOFC stack poses risk of fire and explosion especially due to its high operating temperature. In addition, other factors such as failure rate components, quantity materials, gas leakage and chemical characteristics involved further increase the risks to an alarming level. In reality, these conditions are evolving depending on the current situation which make it challenging in determining the actual risks. Since SOFC technology is still emerging and not widely used, the studies on hazard identification on SOFC system is very minimal. The present work develops a new hazard evolution framework for SOFC system which is mapped into Bayesian network model using open-source software programs, GeNie to bring dynamics in identifying risks and hazards. This allow all potential hazards to be updated in real-time to ensure safe implementation of SOFC unit system in a plant. With this, all factors and evolving conditions contributing to the risks can be estimated with higher precisions to reduce the accidents probability. Sensitivity analysis is also carried out to determine how input parameters influencing the identified hazards. Results showed the probability of fire and explosion occurring in SOFC system is approximately 21% and 7% respectively. Operating conditions (temperature and pressure) are identified as the main causes contributing to the risks. Higher temperature increases risks of Fire from 17% to 21% while higher pressure increases the risks of Explosion from 7% to 18%. The current work identified the occurrence of final hazards in SOFC system dynamically and can be served as guideline for safer implementation of SOFC.

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Section: Sensitivity Analysissupporting

confidence: 53%

“…Accident scenarios or sequence are generated based on logic with respect to past experience and relevant knowledge [17]- [22] . In this study, the main components of SOFC system studied is based on generic SOFC system employing anode gas recycle as shown in Fig.…”

Section: Creating Accident Scenariosmentioning

confidence: 99%

Dynamic Hazard Identification on Solid Oxide Fuel Cell system using Bayesian Networks

Shamsuddin

Muchtar

Nordin

et al. 2022

IJIE

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“…Based on our previous works on the PEMFC and SOFC technology [19][20][21][22][23][24][25][26][27][28][29][30][31] as well as the consulted literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], where this subject has received considerable attention in the literature, but the electrical production effect on SOFC overheating is not yet apparent and undetailed. This present work focuses on obtaining and analyzing the profiles and distributions of the temperature of a single cell P-SOFC, with the same element hart dimensions, according to a steady-state three-dimensional model, when, in the conducted investigation, only the ohmic loss is considered as the heat source to study and determine the current density impact on the P-SOFC heating.…”

Section: Introductionmentioning

confidence: 99%

Electrical Production Effect on the Planar Solid Oxide Fuel Cell Overheating

Sahli¹,

Moungar²,

Benhammou³

et al. 2022

IJHT

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In this work, a steady-state three-dimensional model is employed to investigate the heat transfer phenomena in a Planar Solid Oxide Fuel Cell (P-SOFC) and determine the current density impact on the overheating of this fuel cell type. The thermoelectric characteristics of various components of the P-SOFC are provided from the standard materials: Ni-YSZ for the anode, YSZ for the electrolyte, La1-xSrxMnO3 for the cathode, and LaCrO3 for the interconnectors. The partial differential equations governing the heat transfer phenomena in the different cell parts are modelled using the finite difference method in a threedimensional environment. A program in FORTRAN language is locally developed for solving simultaneously the discretized heat conduction equation. The interest of this work is focused on determining the temperature profiles, fields, and distributions as well as evaluating and analysing the heat created by the current densities produced by the cell itself. The obtained results' analysis shows that for the considered geometric configuration, the P-SOFC components' heating is found to be proportional to the electric energy production.

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Three-Dimensional Numerical Study of Overheating of Two Intermediate Temperature P-AS-SOFC Geometrical Configurations

Cited by 2 publications

References 48 publications

Dynamic Hazard Identification on Solid Oxide Fuel Cell system using Bayesian Networks

Dynamic Hazard Identification on Solid Oxide Fuel Cell system using Bayesian Networks

Electrical Production Effect on the Planar Solid Oxide Fuel Cell Overheating

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