Performance analysis of a tubular solid oxide fuel cell/micro gas turbine hybrid power system based on a quasi-two dimensional model

Song, Taewon; Sohn, Jeong L.; Kim, Jaehwan; Kim, Tong Seop; Ro, Sung Tack; Suzuki, Kenjiro

doi:10.1016/j.jpowsour.2004.10.011

Cited by 112 publications

(54 citation statements)

References 17 publications

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“…(9) - (12), shown in Table 2. These equations developed by Song et al [23] take into account realistic electron/ion paths in a tubular SOFC and they have been used in many studies to simulate the ohmic loss for SPGI tubular SOFC systems [6,23,33]. They assumed uniform current density in the circumferential direction and uniform ionic flux in the electrolyte in the radial direction.…”

Section: Voltage Calculationmentioning

confidence: 99%

“…The equilibrium model, which is based on Gibbs free energy minimisation, performs heat and mass balances and considers the ohmic, activation and concentration losses for the voltage calculation. Equations reported by Song et al [23] were used to calculate ohmic loss. Achenbach's semi-empirical correlations were implemented to determine the activation loss [24].…”

Section: Introductionmentioning

confidence: 99%

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Computer simulation of a biomass gasification-solid oxide fuel cell power system using Aspen Plus

Doherty¹,

Reynolds²,

Kennedy³

2010

Energy

185

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Received ABSTRACTThe operation and performance of a solid oxide fuel cell (SOFC) stack on biomass syn-gas from a biomass gasification combined heat and power (CHP) plant is investigated. The objective of this work is to develop a model of a biomass-SOFC system capable of predicting performance under diverse operating conditions. The tubular SOFC technology is selected. The SOFC stack model, equilibrium type based on Gibbs free energy minimisation, is developed using Aspen Plus. The model performs heat and mass balances and considers ohmic, activation and concentration losses for the voltage calculation. The model is validated against data available in the literature for operation on natural gas. Operating parameters are varied; parameters such as fuel utilisation factor (U f ), current density (j) and steam to carbon ratio (STCR) have significant influence. The results indicate that there must be a trade-off between voltage, efficiency and power with respect to j and the stack should be operated at low STCR and high U f . Operation on biomass syn-gas is compared to natural gas operation and as expected performance degrades.The realistic design operating conditions with regard to performance are identified. High efficiencies are predicted making these systems very attractive.

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Section: Voltage Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computer simulation of a biomass gasification-solid oxide fuel cell power system using Aspen Plus

Doherty¹,

Reynolds²,

Kennedy³

2010

Energy

185

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“…That is why there have been many review papers on the modeling of different types of fuel cells, especially for modeling and simulation of PEFC (Biyikoglu, 2005;Haraldsson & Wipke, 2004;Sousa & Gonzalez, 2005;Tao et al, 2006;Young, 2007;Wang, 2004), SOFC (Young, 2007;Wang, 2004;Kakac et al, 2007;Bove & Ubertini, 2006) and to a lesser extent MCFC (Baker, 1984). As mentioned previously, although both SOFC and MCFC can be used in hybrid cycles, due to the cell reactions and the molten nature of the electrolyte and lower efficiency of MCFC (Song et al, 2005), vast majority of research in this field are in SOFC hybrid cycles. There have been some steady state (Massardo & Bosio, 2002;Iora & Campanari, 2007) and dynamic (Ghezel-Ayagh et al, 2004) modeling on the hybrid MCFC-GT cycles.…”

Section: Fuel Cell Modelingmentioning

confidence: 99%

Advanced Power Generation Technologies: Fuel Cells

Zabihian¹,

Fung²

2010

Paths to Sustainable Energy

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“…There are several different approaches presented in the literature for modeling the complex behavior of a SOFC: 0D models [3,4], 1D models [5], 2D models [6], quasi-2D models [7], 3D models [8], and combined 2D and 3D models [9]. The SOFC model presented in this study has been used to analyze various SOFC hybrid cycles.…”

Section: Introductionmentioning

confidence: 99%

Macro Level Modeling of a Tubular Solid Oxide Fuel Cell

et al. 2010

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This paper presents a macro-level model of a solid oxide fuel cell (SOFC) stack implemented in Aspen Plus ® for the simulation of SOFC system. The model is 0-dimensional and accepts hydrocarbon fuels such as reformed natural gas, with user inputs of current density, fuel and air composition, flow rates, temperature, pressure, and fuel utilization factor. The model outputs the composition of the exhaust, work produced, heat available for the fuel reformer, and electrochemical properties of SOFC for model validation. It was developed considering the activation, concentration, and ohmic losses to be the main over-potentials within the SOFC, and mathematical expressions for these were chosen based on available studies in the literature. The model also considered the water shift reaction of CO and the methane reforming reaction. The model results were validated using experimental data from Siemens Westinghouse. The results showed that the model could capture the operating pressure and temperature dependency of the SOFC performance successfully in an operating range of 1-15 atm for pressure and 900 °C-1,000 °C for temperature. Furthermore, a sensitivity analysis was performed to identify the model constants and input parameters that impacted the over-potentials.

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Performance analysis of a tubular solid oxide fuel cell/micro gas turbine hybrid power system based on a quasi-two dimensional model

Cited by 112 publications

References 17 publications

Computer simulation of a biomass gasification-solid oxide fuel cell power system using Aspen Plus

Computer simulation of a biomass gasification-solid oxide fuel cell power system using Aspen Plus

Advanced Power Generation Technologies: Fuel Cells

Macro Level Modeling of a Tubular Solid Oxide Fuel Cell

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