A reduced 1D dynamic model of a planar direct internal reforming solid oxide fuel cell for system research

Kang, Ying-Wei; Li, Jun; Guang-yi, Cao; Tu, Hongwei; Li, Jian; Yang, Jie

doi:10.1016/j.jpowsour.2008.11.073

Cited by 53 publications

(32 citation statements)

References 11 publications

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“…[1][2][3][4][5][6][7] Several previous studies demonstrated that various types of fuels can be converted into hydrogen-rich gas without using an external fuel processor. [8][9][10][11] In order to prevent the accelerated degradation, operation in DIR-SOFC mode requires additional means to control temperature distribution at the level of the single cell and the complete stack. [12][13][14][15][16] For that reason, external fuel processors are commonly used to generate gas in order to supply the anodic compartments of fuel cell stacks.…”

Section: Discussionmentioning

confidence: 99%

“…This, however, requires dedicated materials and geometries to allow steam reforming to take place at the surface of the anode . Several previous studies demonstrated that various types of fuels can be converted into hydrogen‐rich gas without using an external fuel processor . In order to prevent the accelerated degradation, operation in DIR‐SOFC mode requires additional means to control temperature distribution at the level of the single cell and the complete stack .…”

Section: Introductionmentioning

confidence: 99%

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Kinetic model of a plate fin heat exchanger with catalytic coating as a steam reformer of methane, biogas, and dimethyl ether

et al. 2019

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Summary The paper presents an analysis of a compact plate fin heat exchanger with catalytic coating. The unit is used to convert various fuels into hydrogen‐rich gas, which is then fed into the anodic compartments of a solid oxide fuel cell (SOFC) stack. The study looks at the fuel processor for methane, biogas, and dimethyl ether (DME). In the first phase, the reaction kinetics model was based on data from the literature. This was followed by tuning and validation of the numerical model using data collected during an experimental campaign. Four values of the steam to carbon ratio (2.0, 2.5, 3.0, and 3.5) were used to analyze the performance of the heat exchanger, which was investigated in a temperature range of 500°C to 750°C. The experimental data are compared with predictions of the model implemented in Aspen HYSYS modeling software and discussed. It was found that the relative prediction error of the simulator does not exceed 3.5%.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinetic model of a plate fin heat exchanger with catalytic coating as a steam reformer of methane, biogas, and dimethyl ether

et al. 2019

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“…Based on Kangs work, [22] as implified 1D model for direct internal reforming planar SOFCs (DIR-SOFCs)h as been established. Thes chematic diagram of this SOFC is shown in Figure 2.…”

Section: Methane-fueled Sofc Modelingmentioning

confidence: 99%

Partial‐Load Analysis of a Temperature‐Controlled Solid‐Oxide Fuel Cell–Gas Turbine (SOFC–GT) Hybrid Power Plant

et al. 2015

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Due to high conversion efficiency and low environmental impact, solid‐oxide fuel cells coupled with a gas turbine (SOFC–GT) have received much attention. A proper stack temperature control strategy ensures safety and enhances performance. A heat management subsystem capable of adjusting the stack temperature is critical for the hybrid plant. Most present SOFC–GT plants deliver the full volume of the GT’s exhaust to heat up the stack. Stack cooling is realized by blowing extra air, which consumes more parasitic energy and impacts the plant’s conversion efficiency. In this study, a heat management subsystem has been added into the SOFC–GT plant. The stack average temperature can be adjusted by controlling the volume of the GT’s exhaust and additional fuel. In this way, the parasitic energy owing to the air compressor is reduced. To investigate the proposed plant’s performance, a corresponding model has been established. Simulation results of the specific operating point show that the heat management subsystem can maintain the stack average temperature at its proper value. Furthermore, based on the different air/additional fuel supply patterns, the partial‐load performance of the proposed plant has been compared, and an optimal partial‐load strategy is proposed. The proposed SOFC–GT plant shows a wide output range (370.0–1540.7 kW) with remarkable efficiency (56.8 %–75.0 %).

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“…External reforming requires additional fuel processing units for methane steam reforming and water gas shift (WGS) reactions, thus increasing the system's overall cost and complexity [29][30][31][32][33][34][35]. For comparison, direct internal reforming (DIR) eliminates the need of an external reformer as the high working temperature enables DIR reaction as well as WGS reaction for H 2 production [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. Thus the SOFC system can be simpler and compact.…”

Section: Introductionmentioning

confidence: 99%

Electrolytic effect in solid oxide fuel cells running on steam/methane mixture

2011

Journal of Power Sources

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a b s t r a c tA two-dimensional model is developed to study the performance of a planar solid oxide fuel cell (SOFC) running on steam/methane mixture. The model considers the heat/mass transfer, electrochemical reactions, direct internal reforming of methane (CH 4 ), and water gas shift reaction in an SOFC. It is found that at an operating potential of 0.8 V, the upstream and downstream of SOFC work in electrolysis and fuel cell modes, respectively. At the open-circuit voltage, the electricity generated by the downstream part of SOFC is completely consumed by the upstream through electrolysis, which is contrary to our common understanding that electrochemical reactions cease under the open-circuit conditions. In order to inhibit the electrolytic effect, the SOFC can be operated at a lower potential or use partially pre-reformed CH 4 as the fuel. Increasing the inlet gas velocity from 0.5 m s −1 to 5.0 m s −1 does not reduce the electrolytic effect but decreases the SOFC performance.

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A reduced 1D dynamic model of a planar direct internal reforming solid oxide fuel cell for system research

Cited by 53 publications

References 11 publications

Kinetic model of a plate fin heat exchanger with catalytic coating as a steam reformer of methane, biogas, and dimethyl ether

Kinetic model of a plate fin heat exchanger with catalytic coating as a steam reformer of methane, biogas, and dimethyl ether

Partial‐Load Analysis of a Temperature‐Controlled Solid‐Oxide Fuel Cell–Gas Turbine (SOFC–GT) Hybrid Power Plant

Electrolytic effect in solid oxide fuel cells running on steam/methane mixture

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