Dynamic Model of 5kW SOFC CHP Test Station

Saarinen, Jaakko; Halinen, Matias; Ylijoki, Jukka; Noponen, Matti; Simell, Pekka; Kiviaho, Jari

doi:10.1115/1.2759502

Cited by 17 publications

(35 citation statements)

References 9 publications

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“…A system for such an application is presented in [11]. In this case the anode exhaust gas is burned in an afterburner together with fresh air.…”

Section: Stack Modelmentioning

confidence: 99%

“…The ATR unit also has some other interesting advantages compared to other reformers when considering start-up and unit size. In addition to the reforming reactions (35) -(38), other reactions will occur in the autothermal reformer as well [11,20]:…”

Section: Stack Modelmentioning

confidence: 99%

“…For this purpose a model of a catalytic burner including reactions for oxidation of methane, carbon monoxide and hydrogen is implemented [11]:…”

Section: Catalytic Burnermentioning

confidence: 99%

“…1073 K E a [11] 0.65 eV A cell [11] 361 cm 2 n cell [11] 50 Fuel molar fraction [11] 33% H 2 , 10% CH 4 , 6% CO 6% CO 2 , 20% H 2 O, 25% N 2 Air oxygen mass fraction 23% Stack temperature [11] 760…”

Section: Ohmic Loss Cell Modelmentioning

confidence: 99%

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Dynamic modeling of a solid oxide fuel cell system in Modelica

Andersson¹,

Åberg²,

Eborn³

et al. 2011

Linköping Electronic Conference Proceedings

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In this study a dynamic model of a solid oxide fuel cell system has been developed. The work has been conducted in cooperation with Modelon AB using the Modelica language and the Dymola modeling and simulation tool. Modelica is an equation based, object oriented modeling language, which promotes exibility and reuse of code. The objective of the study is to investigate the suitability of the Modelica language for dynamic fuel cell modeling. A cell electrolyte model including ohmic, activation and concentration irreversibilities is implemented and validated against simulations and experimental data presented in the open literature. A 1D solid oxide fuel cell model is created by integrating the electrolyte model and a 1D fuel ow model, which includes dynamic internal steam reforming of methane and water-gas shift reactions. Several cells are then placed with parallel ow paths and connected thermally and electrically in series. By introducing manifold pressure drop a stack model is created. The stack model is used in a complete system model including an autothermal reformer, a catalytic afterburner and heat recirculation. Four reactions are modeled in the autothermal reformer. Those are two types of methane steam reforming, the water-gas shift reaction and total combustion of methane. The simulation results have been compared with those in the literature and it can be concluded that the models are accurate and that Dymola and Modelica are tools well suited for simulations of the transient fuel cell system behaviour.

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“…A system for such an application is presented in [11]. In this case the anode exhaust gas is burned in an afterburner together with fresh air.…”

Section: Stack Modelmentioning

confidence: 99%

Section: Stack Modelmentioning

confidence: 99%

“…For this purpose a model of a catalytic burner including reactions for oxidation of methane, carbon monoxide and hydrogen is implemented [11]:…”

Section: Catalytic Burnermentioning

confidence: 99%

Section: Ohmic Loss Cell Modelmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic modeling of a solid oxide fuel cell system in Modelica

Andersson¹,

Åberg²,

Eborn³

et al. 2011

Linköping Electronic Conference Proceedings

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show abstract

“…Ref. [31], for example, reports a modeling effort within a Finnish comprehensive project to develop a 5 kW e SOFC system for cogeneration applications. The simplified model is implemented in a commercial software and applied to a test station for phenomenological studies on transients and is capable of real-time execution.…”

mentioning

confidence: 99%

Modeling of solid oxide fuel cells for dynamic simulations of integrated systems

Salogni

Colonna

2010

Applied Thermal Engineering

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Solid oxide fuel cell (SOFC) stacks are at the core of complex and efficient energy conversion systems for distributed power generation. Such systems are currently in various stages of development. These power plants of the future feature complicated configurations, because the fuel cell demands for a complex balance of plant. Moreover, proposed SOFCbased systems for stationary applications are often connected to additional components and subsystems, such as a gasifier with its gas-cleaning section, a gas turbine, and a heat recovery system for thermal cogeneration or additional power production. For the simplest SOFC configurations, and more so for complex integrated systems, the dynamic operation of the power plant is challenging, especially because the fluctuating electrical load of distributed energy systems demand for reliable transient operation. Issues related to dynamic operation must be studied in the early design stage and simulation results can be used to optimize the system configuration, taking into account transient behavior. This paper presents the development and the validation of a non-linear dynamic lumped-parameters model of a SOFC stack suitable for integration into models of complex power plants. Particular emphasis is placed on the systematic approach to model development. The model is implemented using the open-source Modelica language, which allows for a high degree of flexibility and modularity, the main features of the model herein presented. The SOFC stack model will be incorporated into ThermoPower, a freely distributed library of reusable software components for the modeling of thermo-hydraulic processes and power plants.

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Experimental Analysis on Performance and Durability of SOFC Demonstration Unit

et al. 2010

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A technical description and experimental analysis of a SOFC demonstration unit is presented. The unit contains most of the primary BoP‐components of a complete SOFC system, except of air and fuel recirculation equipment or fuel system compressor. Natural gas is used as the fuel and electricity is supplied to the electric grid. A 5 kW power class planar SOFC stack from Research Centre Jülich is assembled to the demo unit and a long‐term experiment is conducted to assess the characteristic performance and durability of different components of the unit (e.g. the SOFC stack, the fuel pre‐reformer and air heat exchangers). The evolution of absolute voltage drop of the stack over time is found to be of the same magnitude when compared to short stack experiments. Thus, other system components are not observed to cause an increase in the characteristic voltage drop of the stack. Two BoP‐components, the afterburner and the power conversion unit failed to operate as designed. The performance of other BoP‐components i.e. fuel pre‐reformer and heat exchangers were satisfactory during the test run, and no significant performance loss could be measured.

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Dynamic Model of 5kW SOFC CHP Test Station

Cited by 17 publications

References 9 publications

Dynamic modeling of a solid oxide fuel cell system in Modelica

Dynamic modeling of a solid oxide fuel cell system in Modelica

Modeling of solid oxide fuel cells for dynamic simulations of integrated systems

Experimental Analysis on Performance and Durability of SOFC Demonstration Unit

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