Transient Analysis of Solid Oxide Fuel Cell Hybrids—Part I: Fuel Cell Models

2004 ◽  
Vol 128 (2) ◽  
pp. 288-293 ◽  
Author(s):  
Loredana Magistri ◽  
Francesco Trasino ◽  
Paola Costamagna
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Transient Analysis ◽  
Cell Model ◽  
Hybrid Plant ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Detailed Model ◽  
Whole Plant ◽  
Asme Paper

The main goal of this work is the transient analysis of hybrid systems based on solid oxide fuel cells (SOFC). The work is divided into three parts: in the first, the fuel cell transient models are presented and discussed, whereas in the subsequent parts of the paper the anodic recirculation system (Part B: Ferrari, M.L., Traverso, A., Massardo, A.F., 2004, ASME Paper No. 2004-GT-53716) and the entire hybrid transient performance (Part C: Magistri, L., Ferrari, M.L., Traverso, A., Costamagna, P., Massardo, A.F., 2004, ASME Paper No. 2004-GT-53845) are investigated. In this paper the transient behavior of a solid oxide fuel cell is analyzed through the use of two different approaches: macroscopic and detailed SOFC models. Both models are presented in this paper, and their simulation results are compared to each other and to available experimental data. As a first step the transient response of the fuel cell was studied using a very detailed model in order to completely describe this phenomenon and to highlight the critical aspects. Subsequently, some modifications were made to this model to create an apt simulation tool (macroscopic fuel cell model) for the whole plant analysis. The reliability of this model was verified by comparing several transient responses to the results obtained with the detailed model. In the subsequent papers (Parts B and C), the integration of the macroscopic fuel cell model into the whole plant model will be described and the transient study of the hybrid plant will be presented.

Transient Analysis of Solid Oxide Fuel Cell Hybrids: Part A — Fuel Cell Models

2004 ◽  
Author(s):  
Loredana Magistri ◽  
Francesco Trasino ◽  
Paola Costamagna
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Transient Analysis ◽  
Cell Model ◽  
Transient Behavior ◽  
Hybrid Plant ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Detailed Model ◽  
Whole Plant

The main goal of this work is the transient analysis of Hybrid Systems based on Solid Oxide Fuel Cells. The work is divided into three parts: in the first the fuel cell transient models are presented and discussed, while in the following papers the anodic recirculation system (Part B) and the entire hybrid transient performance (Part C) are investigated. In this paper the transient behavior of a Solid Oxide Fuel Cell is analyzed through the use of two different approaches: macroscopic and detailed SOFC models. Both models are presented in this paper and their simulation results are compared to each other and to available experimental data. As a first step the transient response of the fuel cell was studied using very detailed model in order to completely describe this phenomenon and to highlight the critical aspects. Subsequently some modifications were made to this model to create an apt simulation tool (Macroscopic Fuel Cell Model) for the whole plant analysis. The reliability of this model was verified comparing several transient responses to the results obtained with the detailed model. In the following papers (Parts B and C) the integration of the macroscopic fuel cell model into the whole plant model will be described and the transient study of the hybrid plant will be presented.

Numerical stiffness study of multi-physical solid oxide fuel cell model for real-time simulation applications

2018 ◽  
Vol 226 ◽  
pp. 570-581 ◽  
Author(s):  
Rui Ma ◽  
Chen Liu ◽  
Elena Breaz ◽  
Pascal Briois ◽  
Fei Gao
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Real Time ◽  
Cell Model ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Real Time Simulation ◽  
Time Simulation

Comparison of Solid Oxide Fuel Cell Stack Performance Using Detailed and Simplified Models

2013 ◽  
Author(s):  
R. T. Nishida ◽  
S. B. Beale ◽  
J. G. Pharoah
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Computational Cost ◽  
Transport Equations ◽  
Solid Oxide ◽  
Simplified Model ◽  
Oxide Fuel ◽  
Simplified Models ◽  
Detailed Model ◽  
Fuel Cell Stack

Two computational fluid dynamics models have been developed to predict the performance of a solid oxide fuel cell stack, a detailed and a simplified model. In the detailed model, the three dimensional momentum, heat, and species transport equations are coupled with electrochemistry. In the simplified model, the diffusion terms in the transport equations are selectively replaced by rate terms within the core region of the stack. This allows much coarser meshes to be employed at a fraction of the computational cost. Following the mathematical description of the problem, results for a single cell and multi-cell stack are presented. Comparisons of local current density, temperature, and cell voltage indicate that good agreement is obtained between the detailed and simplified models, confirming the validity of the latter as a practical option in stack design.

Sheet Resistance in Thin Film Solid Oxide Fuel Cell Model Cathodes: A Case Study on Circular Bi1-xSrxFeO3-  Microelectrodes

2012 ◽  
Vol 45 (1) ◽  
pp. 213-224 ◽  
Author(s):  
A. Wedig ◽  
M. E. Lynch ◽  
R. Merkle ◽  
J. Maier ◽  
M. Liu
Keyword(s):  
Thin Film ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Sheet Resistance ◽  
Cell Model ◽  
Solid Oxide ◽  
Oxide Fuel

Performance Study of Hybrid Solid Oxide Fuel Cell–Gas Turbine Power System

2010 ◽  
Vol 171-172 ◽  
pp. 319-322
Author(s):  
Hong Bin Zhao ◽  
Xu Liu
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Gas Turbine ◽  
Hybrid System ◽  
Cell Model ◽  
Research Work ◽  
Atmospheric Condition ◽  
Operating Conditions ◽  
Solid Oxide ◽  
Oxide Fuel

The simulation and analyses of a “bottoming cycle” solid oxide fuel cell–gas turbine (SOFC–GT) hybrid system at the standard atmospheric condition is presented in this paper. The fuel cell model used in this research work is based on a tubular Siemens–Westinghouse–type SOFC with 1.8MW capacity. Energy and exergy analyses of the whole system at fixed conditions are carried out. Then, comparisons of the exergy destruction and exergy efficiency of each component are also conducted to determine the potential capability of the hybrid system to generate power. Moreover, the effects of operating conditions including fuel flow rate and SOFC operating temperature on performances of the hybrid system are analyzed.

Numerical Analysis of Heat/Mass Transfer and Electrochemical Reaction in an Anode-Supported Flat-Tube Solid Oxide Fuel Cell

2006 ◽  
Author(s):  
Masayuki Suzuki ◽  
Naoki Shikazono ◽  
Koji Fukagata ◽  
Nobuhide Kasagi
Keyword(s):  
Mass Transfer ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Electrochemical Reaction ◽  
Cell Model ◽  
Flow Direction ◽  
Three Dimensional ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Flat Tube

Three-dimensional heat and mass transfer and electrochemical reaction in an anode-supported flat-tube solid oxide fuel cell (FT-SOFC) are studied. Transport and reaction phenomena mainly change in the streamwise direction. Exceptionally, hydrogen and water vapor have large concentration gradients also in the cross section perpendicular to the flow direction, because of the insufficient mass diffusion in the porous anode. Based on these results, we develop a simplified one-dimensional cell model. The distributions of temperature, current, and overpotential predicted by this model show good agreement with those obtained by the full three-dimensional simulation. We also investigate the effects of pore size, porosity and configuration of the anode on the cell performance. Extensive parametric studies reveal that, for a fixed three-phase boundary (TPB) length, rough material grains are preferable to obtain higher output voltage. In addition, when the cell has a thin anode with narrow ribs, drastic increase in the volumetric power density can be achieved with small voltage drop.

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