Multi-Level Mathematical Modeling of Solid Oxide Fuel Cells

Kupecki, Jakub; Milewski, Jarosaw

doi:10.5772/50724

Cited by 11 publications

(5 citation statements)

References 60 publications

(55 reference statements)

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“…Typical cells in a SOFC stack are operating under constant current density of 200-250 mA cm -2 during continuous operation (25). Value of 225 mA cm -2 was selected as a reference for creation of the efficiency characteristics.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Sensitivity of a Micro-CHP Unit Performance to SOFC Parameters

2013

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The work presents outcomes of a study of micro-CHP (Combined Heat and Power) unit with SOFCs (Solid Oxide Fuel Cells). Numerical simulator of the entire micro-CHP system was created, and characteristics of auxiliary equipment were implemented. Typically, micro-CHP system with solid oxide fuel cells is capable of achieving electrical efficiency of over 45% at the scale of 1-3 kWel. This is possible only when proper cells are selected for the stack. In the work eights planar fuel cells with different properties were included in the analysis. Numerical tool was used to predict performance of each of the cells in the operating conditions corresponding to the studied system. Simulations allowed performing sensitivity evaluation of the power unit to fuel cell properties. Results clearly show that different SOFC materials and type of support strongly influence system performance. Efficiency of the system ranges between 38-50% LHV-based depending on a cell.

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Section: Resultsmentioning

confidence: 99%

Evaluation of Sensitivity of a Micro-CHP Unit Performance to SOFC Parameters

2013

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“…Mass transport in fuel and air gas channels can be treated as a fully developed laminar flow described sufficiently by means of velocity and temperature. Flow patterns within fuel cell channels were previously studied, and laminar character was found to be indeed a proper assumption [2]. Additionally, in the systemlevel studies, one-and two-dimensional models can help to evaluate thermal integration of components.…”

Section: One-and Two-dimensional Modellingmentioning

confidence: 99%

“…Selection of a modelling method must be based on its capability of covering these processes in a sufficient way and with a required accuracy. Summary of typically considered phenomena with their corresponding length scales is presented in Table 1 after [2]. Additionally, corresponding time scales have to be taken into account while developing mathematical description of processes involved in transient 2 analysis.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Physical, Chemical, and Material Properties of Solid Oxide Fuel Cells

Kupecki

2015

Journal of Chemistry

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This paper provides a review of modelling techniques applicable for system-level studies to account for physical, chemical, and material properties of solid oxide fuel cells. Functionality of 0D to 3D models is discussed and selected examples are given. Author provides information on typical length scales in evaluation of power systems with solid oxide fuel cells. In each section, proper examples of previous studies done in the field of 0D–3D modelling are recalled and discussed.

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“…Fuel conversion into electricity is never completed in SOFCs. Typically, fuel utilization in range 0.70-0.85 is chosen in a fully operational system [13]. Lean fuel leaving the stack is directed to the post-combustor.…”

Section: Introductionmentioning

confidence: 99%

Mathematical model of a plate fin heat exchanger operating under solid oxide fuel cell working conditions

Kupecki¹,

Badyda²

2013

Archives of Thermodynamics

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Heat exchangers of different types find application in power systems based on solid oxide fuel cells (SOFC). Compact plate fin heat exchangers are typically found to perfectly fit systems with power output under 5 kW el . Micro-combined heat and power (micro-CHP) units with solid oxide fuel cells can exhibit high electrical and overall efficiencies, exceeding 85%, respectively. These values can be achieved only when high thermal integration of a system is assured. Selection and sizing of heat exchangers play a crucial role and should be done with caution. Moreover, performance of heat exchangers under variable operating conditions can strongly influence efficiency of the complete system. For that reason, it becomes important to develop high fidelity mathematical models allowing evaluation of heat exchangers under modified operating conditions, in high temperature regimes. Prediction of pressure and temperatures drops at the exit of cold and hot sides are important for system-level studies. Paper presents dedicated mathematical model used for evaluation of a plate fin heat exchanger, operating as a part of micro-CHP unit with solid oxide fuel cells.

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Multi-Level Mathematical Modeling of Solid Oxide Fuel Cells

Cited by 11 publications

References 60 publications

Evaluation of Sensitivity of a Micro-CHP Unit Performance to SOFC Parameters

Evaluation of Sensitivity of a Micro-CHP Unit Performance to SOFC Parameters

Modelling of Physical, Chemical, and Material Properties of Solid Oxide Fuel Cells

Mathematical model of a plate fin heat exchanger operating under solid oxide fuel cell working conditions

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