Public Toilets - Appendix 1 - draft report
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Public Toilets - Appendix 1 - draft report
Public Toilets - Appendix 1 - draft report
^jlfWestVirginiaUniversityTHE RESEARCH REPOSITORY @ wvuGraduate Theses, Dissertations, and Problem Reports2014Refined computational modeling of SOFCs Public Toilets - Appendix 1 - draft report degradation due to trace impurities in coal syngasHayri SezerFollow this and additional works at: https7/researchrepo$itory wvu.edu/etdRecommended CitationSezer, Hayri, "Refined computational modeling of SOFCs degradation due to trace impurities in coal syngas" (2014). Graduate Theses. Dissertation Public Toilets - Appendix 1 - draft reports, and Problem Reports. 6607.https://researchrepository.wvu.edu/etd/6607This Dissertation is protected by copyright and/or related rights. It has beenPublic Toilets - Appendix 1 - draft report
brought to you by the The Research Repository © wvu with permission from the rights-holder(s). You are free to use this Dissertation in any way that ^jlfWestVirginiaUniversityTHE RESEARCH REPOSITORY @ wvuGraduate Theses, Dissertations, and Problem Reports2014Refined computational modeling of SOFCs Public Toilets - Appendix 1 - draft reportr(s) directly, unless additional rights are indicated by a Creative Commons license in the record and/ or on the work itself. This Dissertation has been accepted for inclusion in wvu Graduate Theses. Dissertations, and Problem Reports collection by an authorized administrator of The Research Reposit Public Toilets - Appendix 1 - draft reportory © wvu. For more information, please contact researchrepository©mail wvu edu.REFINED COMPUTATIONAL MODELING OF SOFCS DEGRADATION DUE TO TRACE IMPURPublic Toilets - Appendix 1 - draft report
ITIES IN COAL SYNGASHayri SezerDissertation submitted to the Benjamin M. Statler College of Engineering and Mineral Resources at West Virginia Univers^jlfWestVirginiaUniversityTHE RESEARCH REPOSITORY @ wvuGraduate Theses, Dissertations, and Problem Reports2014Refined computational modeling of SOFCs Public Toilets - Appendix 1 - draft reportD.Harry Finklea, Ph.D.Kirk Gerdes. Ph.D.Nianqiang (Nick) Wu, Ph.D.Department of Mechanical and Aerospace EngineeringMorgantown. West Virginia 2014Keywords: Keywords: Solid Oxide Fuel Cells, Contaminant Degradation, Automatic differentiation. Sensitivity Analysis, Impedance, Polarization, Nickel migr Public Toilets - Appendix 1 - draft reportation. Electromigration.Copyright 2014 Hayri SezerABSTRACTREFINED COMPUTATIONAL MODELING OF sores DEGRADATION DUE TO TRACE IMPURITIES IN COALSYNGASITaPublic Toilets - Appendix 1 - draft report
yri Sezer •The Solid Oxide Fuel Cell (SOFC) is a good alternative for clean and efficient power generation. These cells can be operated directly on a ^jlfWestVirginiaUniversityTHE RESEARCH REPOSITORY @ wvuGraduate Theses, Dissertations, and Problem Reports2014Refined computational modeling of SOFCs Public Toilets - Appendix 1 - draft reportmuch less environmental impact. One of the challenges in this technology is poisoning of SOI c anodes by trace impurities contained in coal syngas. One such impurity, phosphine is known to cause catastrophic failure of SOFC anode even at <10ppm concentrations. Fuel impurity degradation patterns can Public Toilets - Appendix 1 - draft reportvary by different operating conditions such as humidity, applied current, temperature and anode thickness.In the present study, more detailed models aPublic Toilets - Appendix 1 - draft report
re developed to predict the typical degradation behaviors observed in SOFC anode due to phosphine by extension of an in-house one-dimensional computat^jlfWestVirginiaUniversityTHE RESEARCH REPOSITORY @ wvuGraduate Theses, Dissertations, and Problem Reports2014Refined computational modeling of SOFCs Public Toilets - Appendix 1 - draft report is refined based on the experimental observation, which indicate that the phosphine degradation is less severe in the absence of steam. Simulations results showed good agreement with experimental data. Then, a sensitivity analysis, using dual numbers automatic differentiation (DNAD) is performed to Public Toilets - Appendix 1 - draft report investigate the influence of empirical model parameters on model outputs, electrical potential, ohmic and polarization losses. Further, the refined oPublic Toilets - Appendix 1 - draft report
ne-dimensional model is extended to a three-dimensional model to study the phosphine induced performance degradation in relatively large planar cells ^jlfWestVirginiaUniversityTHE RESEARCH REPOSITORY @ wvuGraduate Theses, Dissertations, and Problem Reports2014Refined computational modeling of SOFCs Public Toilets - Appendix 1 - draft reportameters are then used in planar cell simulations. The results from the three dimensional model show that the contaminant coverage of nickel and fuel distribution inside the anode is highly non-uniform, These non-uniform distributions arc caused by the geometrical alignment of gas channels and curren Public Toilets - Appendix 1 - draft reportt collectors, as well as the variation of gas concentration along the flow direction. The non-uniform deactivation of anode gave rise to the alteringPublic Toilets - Appendix 1 - draft report
of current distribution inside the planar cell such that the cell can still produce current even when some regions of the anode arc partially inactive^jlfWestVirginiaUniversityTHE RESEARCH REPOSITORY @ wvuGraduate Theses, Dissertations, and Problem Reports2014Refined computational modeling of SOFCs Public Toilets - Appendix 1 - draft reportical behavior (polarization and impedance) of the cell. The simulation results are assessed in comparison to experimental observation whenever possible. Finally, a physics based transport model for nickel migration is formulated based on experimentally observed elemental redistribution in a SOFC ano Public Toilets - Appendix 1 - draft reportde and it is integrated into refined one-dimensional phosphine degradation code. Simulations show that the proposed mechanism ofNi diffusion driven byPublic Toilets - Appendix 1 - draft report
secondary phase formation, the electrical force, and humidity can explain the experimentally observed accumulation of Xi and secondary phases on the ^jlfWestVirginiaUniversityTHE RESEARCH REPOSITORY @ wvuGraduate Theses, Dissertations, and Problem Reports2014Refined computational modeling of SOFCs Public Toilets - Appendix 1 - draft reportlarization, Nickel migration, Electromigration.^jlfWestVirginiaUniversityTHE RESEARCH REPOSITORY @ wvuGraduate Theses, Dissertations, and Problem Reports2014Refined computational modeling of SOFCsGọi ngay
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