The analyses of the start-up process of a planar, anode-supported solid oxide fuel cell using three different start-up procedures

Chen, Ming Hong; Jiang, Tsung Leo

doi:10.1016/j.jpowsour.2012.08.018

Cited by 16 publications

(2 citation statements)

References 35 publications

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“…Benign operation conditions in terms of transient gradients already lead to complex control strategies due to the number of physical variables that need to be controlled as well as material and operational constraints. For safe and economically feasible system start-up, further aspects need to be addressed [18,19], for example due to the need for safety gas [20] to maintain proper conditions with respect to chemical potential in the material to avoid excessive stresses during rapid transients. However, compared to studies that are concerned with design point performance and off-design (including part-load operation), relatively few publications exist dealing with detailed transient behavior on a system level.…”

Section: Introductionmentioning

confidence: 99%

Start-Up of a Solid Oxide Fuel Cell System with a View to Materials Science-Related Aspects, Control and Thermo-Mechanical Stresses

Colombo

Хартон

2021

Crystals

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The start-up of a solid oxide fuel cell (SOFC) is investigated by means of numerical simulation with a view to material and operational constraints on a component and system level, as well as thermo-mechanical stresses. The applied multi-physics modeling approach couples thermal-, electrochemical, chemical-, and thermo-mechanical phenomena. In addition to constraints, emphasis is given to degrees of freedom with respect to manipulated and controlled variables of the system. Proper ramping during the start-up procedure keeps critical parameter values within a safe regime. Of particular interest are gradient in terms of temperature and chemical concentrations. Nevertheless, simulations show that thermo-mechanical stresses are relatively high during the initial start-up phase, the system is, thus, more susceptible to failure. The combination of multi-physics modeling in conjunction with practical control aspects for start-up of an SOFC, which is presented in this paper, is important for applications.

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Section: Introductionmentioning

confidence: 99%

Start-Up of a Solid Oxide Fuel Cell System with a View to Materials Science-Related Aspects, Control and Thermo-Mechanical Stresses

Colombo

Хартон

2021

Crystals

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“…[27][28][29][30][31][32][33][34][35] Operation under relatively benign conditions in terms of transient gradients already leads to complex control strategies, because of the number of physical variables that need to be controlled as well as material and operational constraints. For safe and economically feasible system start-up, further requirements need to be addressed, 36,37 for example, the use of inert gas (so-called safety gas) 38 to maintain proper conditions with respect to chemical potential in the material and thus avoiding excessive stresses under rapid transients. However, compared with studies that are concerned with design point and off-design/part-load performance, relatively few works exist on detailed transient behavior on a system level.…”

mentioning

confidence: 99%

Transient simulation of failures during start‐up and power cut of a solid oxide fuel cell system using multiphysics modeling

Colombo

Хартон

Berto

et al. 2020

Mat Design & Process Comms

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We investigate failure incidents of a solid oxide fuel cell (SOFC) system during start-up from ambient conditions as well as during operation around the design point, using numerical simulation with a view to performance and thermo-mechanical stresses. During start-up, which comprises heating and load ramping phases, the system's trajectory moves through a relatively large temperature range. The simulated failure scenarios include reversible operational discontinuities in terms of input parameters and irreversible hardware failures. Furthermore, we also present results for a complete power cut. A multiphysics modeling approach is used to couple thermal, electrochemical, chemical, and thermo-mechanical phenomena by means of time-dependent partial differential, algebraic, and integral equations. Simulations revealed that the system can smooth out thermal discontinuities that are within a few minutes, that is, within the range of its thermal inertia. However, during the initial phase of the start-up procedure, thermo-mechanical stresses are relatively high due to larger differences between the sintering (manufacturing) and operation temperature, which makes the system more susceptible to failure. This work demonstrates that a multiphysics approach with control-and reliability-relevant aspects leads to a realistic problem formulation and analysis for practical applications.

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Feasibility study on saturated water cooled solid oxide fuel cell stack

et al. 2020

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The analyses of the start-up process of a planar, anode-supported solid oxide fuel cell using three different start-up procedures

Cited by 16 publications

References 35 publications

Start-Up of a Solid Oxide Fuel Cell System with a View to Materials Science-Related Aspects, Control and Thermo-Mechanical Stresses

Start-Up of a Solid Oxide Fuel Cell System with a View to Materials Science-Related Aspects, Control and Thermo-Mechanical Stresses

Transient simulation of failures during start‐up and power cut of a solid oxide fuel cell system using multiphysics modeling

Feasibility study on saturated water cooled solid oxide fuel cell stack

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