Analytical Study, One Dimensional Computational Simulation, and Optimization of an Electrode Supported Solid Oxide Electrolysis Cell

Persistent Link:
http://hdl.handle.net/10150/193404
Title:
Analytical Study, One Dimensional Computational Simulation, and Optimization of an Electrode Supported Solid Oxide Electrolysis Cell
Author:
Milobar, Daniel Gregory
Issue Date:
2010
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
A one dimensional mass transfer analysis was performed for convective transport as well as mass transport within a porous media. This analysis was based on the analogous average heat transfer within a duct. Equations were developed to calculate the concentration of gas species at the triple phase boundary sites present at the interface of a porous electrode and a nonporous electrolyte. The mass transport analyzed on the steam side electrode of a solid oxide electrolysis cell was performed for a ternary gas mixture. In this analysis two gas species were actively diffusing in the presence of a third inert carrier gas. Multicomponent diffusion coefficients were determined for each species in the steam side electrode mixture. The mass transport analysis performed on the air side electrode utilized a binary gas mixture, namely air. At less than one percent of the total mixture of air, the combined effects of Argon and Carbon Dioxide were assumed to be negligible. This assumption allowed us to consider air a binary mixture. A comprehensive model was developed to determine cell performance under various operating condition and multiple cell geometries. The output of this model was used to optimize various physical features of the cell. Tests were performed on electrode supported solid oxide electrolysis cells at the Idaho National Laboratory. These cells were subjected to various operating temperatures and inlet steam mole fractions. Voltage vs. current density experimental data were collected and compared to computational data in order to validate the model.
Type:
text; Electronic Thesis
Keywords:
Coupled Processes; Electrolysis; Hydrogen; Mathematical Model; Optimization; SOEC
Degree Name:
M.E.
Degree Level:
masters
Degree Program:
Mechanical Engineering; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Li, Peiwen

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleAnalytical Study, One Dimensional Computational Simulation, and Optimization of an Electrode Supported Solid Oxide Electrolysis Cellen_US
dc.creatorMilobar, Daniel Gregoryen_US
dc.contributor.authorMilobar, Daniel Gregoryen_US
dc.date.issued2010en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractA one dimensional mass transfer analysis was performed for convective transport as well as mass transport within a porous media. This analysis was based on the analogous average heat transfer within a duct. Equations were developed to calculate the concentration of gas species at the triple phase boundary sites present at the interface of a porous electrode and a nonporous electrolyte. The mass transport analyzed on the steam side electrode of a solid oxide electrolysis cell was performed for a ternary gas mixture. In this analysis two gas species were actively diffusing in the presence of a third inert carrier gas. Multicomponent diffusion coefficients were determined for each species in the steam side electrode mixture. The mass transport analysis performed on the air side electrode utilized a binary gas mixture, namely air. At less than one percent of the total mixture of air, the combined effects of Argon and Carbon Dioxide were assumed to be negligible. This assumption allowed us to consider air a binary mixture. A comprehensive model was developed to determine cell performance under various operating condition and multiple cell geometries. The output of this model was used to optimize various physical features of the cell. Tests were performed on electrode supported solid oxide electrolysis cells at the Idaho National Laboratory. These cells were subjected to various operating temperatures and inlet steam mole fractions. Voltage vs. current density experimental data were collected and compared to computational data in order to validate the model.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
dc.subjectCoupled Processesen_US
dc.subjectElectrolysisen_US
dc.subjectHydrogenen_US
dc.subjectMathematical Modelen_US
dc.subjectOptimizationen_US
dc.subjectSOECen_US
thesis.degree.nameM.E.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineMechanical Engineeringen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairLi, Peiwenen_US
dc.contributor.committeememberLi, Peiwenen_US
dc.contributor.committeememberChan, Cho Liken_US
dc.contributor.committeememberGanapol, Barry Den_US
dc.identifier.proquest11028en_US
dc.identifier.oclc752260965en_US
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