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dc.contributor.authorAydin, Ozgur
dc.contributor.authorMatsumoto, Go
dc.contributor.authorShiratori, Yusuke
dc.date.accessioned2022-02-17T12:13:31Z
dc.date.available2022-02-17T12:13:31Z
dc.date.issued2021en_US
dc.identifier.issn1300-0527
dc.identifier.urihttps //doi.org/10.3906/kim-2011-48
dc.identifier.urihttps://hdl.handle.net/20.500.12573/1164
dc.descriptionThis work was supported by JSPS KAKENHI Grant Number JP17H03185. A part of Dr. Aydin's contribution to this research was supported by "Postdoctoral Fellowship of JSPS (Japanese Society for the Promotion of Science)".en_US
dc.description.abstractGenerating power from renewable biogas in solid oxide fuel cells (SOFCs) is an environment-friendly, efficient, and promising energy conversion process. Biogas can be used in SOFCs via a reforming process for which dry reforming is more suitable as the reforming agent exists in the biogas mixture. Biogas can be directly reformed to H-2 -rich fuel stream in the anode chamber of a SOFC by the heat released during power generation. Exploiting the heat and water produced in the SOFC for internal reforming of biogas makes the energy conversion process very efficient; however, various challenges are reported. Thus, indirect internal reforming is opted for which a separate reforming domain is required. In an indirect internal reformer operating at usual conditions, dry reforming rate is quite high in the inlet and it decreases steeply toward the fuel outlet. Great temperature gradients develop over the reformer, since the dry reforming reaction is strongly endothermic. The abruptly varying rate of the reforming reaction affects the temperature fields in the adjacent components of SOFC and hence intolerable thermal stresses emerge on the SOFC components. In our preceding study, we graded the reforming domain, homogenized the temperature profile over the reforming domain, and executed performance and durability experiments. However, most of the experiments failed due to fracturing SOFC components hinting at existence of thermal stresses. In that study, we focused on minimizing the temperature gradients within the reforming domain; namely, we neglected the other processes. To eliminate the thermal stresses, we modeled the entire module of SOFC equipped with a reformer featuring a graded reforming domain. We found that the mismatch between the thermal conductivities of the adjacent module components is the major reason for the thermal stresses. When the mismatch is eliminated, thermal stresses disappear even if the reforming domain is not graded.en_US
dc.description.sponsorshipMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research (KAKENHI) JP17H03185 Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Scienceen_US
dc.language.isoengen_US
dc.publisherSCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAKATATURK BULVARI NO 221, KAVAKLIDERE, TR-06100 ANKARA, TURKEYen_US
dc.relation.isversionof10.3906/kim-2011-48en_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectIndirect internal reformingen_US
dc.subjectgraded reforming domainen_US
dc.subjectdry reformingen_US
dc.subjectsolid oxide fuel cellen_US
dc.subjectthermal analysisen_US
dc.subjectone-cell moduleen_US
dc.titleThermal stresses in SOFC stacks: the role of mismatch among thermal conductivity of adjacent componentsen_US
dc.typearticleen_US
dc.contributor.departmentAGÜ, Mühendislik Fakültesi, Makine Mühendisliği Bölümüen_US
dc.contributor.institutionauthorAydin, Ozgur
dc.identifier.volumeVolume 45 Issue 3 Page 719-736en_US
dc.relation.journalTURKISH JOURNAL OF CHEMISTRYen_US
dc.relation.publicationcategoryMakale - Uluslararası - Editör Denetimli Dergien_US


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