Geometric optimization of an ejector for a 4 kW SOFC system with anode off-gas recycle

Basit Öğe Kaydı
dc.contributor.authorGenc O.
dc.contributor.authorToros S.
dc.contributor.authorTimurkutluk B.
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2018
dc.departmentNiğde ÖHÜ
dc.description.abstractOne of the important energy saving tools used in solid oxide fuel cell (SOFC) system is the anode off-gas recycling (AGR) via an ejector which allows the recirculation of the unused fuels in the anode exhaust gas including hot steam which is essential for the elimination of the carbon deposition and the initiation of the reactions in the reformer. In an ejector system developed for the SOFCs, the steam to carbon ratio (STCR) and entrainment ratio are the crucial parameters for the determination of the ejector performance. These parameters can be engineered by modifying the geometric dimensions and operation conditions. This study focuses on the determination of the maximum STCR value and entrainment ratio via numerical geometric analyses for a micro combined heat and power (µ-CHP) system based on 4 kW SOFC, utilizing methane. A detailed numerical procedure for designing an ejector is provided and the ejector performance is investigated for different critical dimensions (throat diameter, nozzle exit angle and nozzle position etc.). The results show that the nozzle position and the nozzle exit angle significantly affect STCR and the entrainment ratio. When the nozzle position increases and nozzle exit angle decreases, the entrainment ratio and STCR is found to increase. The entrainment ratio and STCR are determined as around 7.3 and 2.7, respectively for a specific design created in the study. © 2018 Hydrogen Energy Publications LLC
dc.description.sponsorshipThe equipment and materials support of this research by TUBITAK under a project number of 213M030 is gratefully acknowledged.
dc.identifier.doi10.1016/j.ijhydene.2018.03.213
dc.identifier.endpage9422
dc.identifier.issn0360-3199
dc.identifier.issue19
dc.identifier.scopus2-s2.0-85045842971
dc.identifier.scopusqualityQ1
dc.identifier.startpage9413
dc.identifier.urihttps://dx.doi.org/10.1016/j.ijhydene.2018.03.213
dc.identifier.urihttps://hdl.handle.net/11480/1657
dc.identifier.volume43
dc.identifier.wosWOS:000432502700029
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherElsevier Ltd
dc.relation.ispartofInternational Journal of Hydrogen Energy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAnode off-gas recycling
dc.subjectEjector
dc.subjectEntrainment ratio
dc.subjectGeometric design
dc.subjectSolid oxide fuel cell
dc.subjectSteam to carbon ratio
dc.titleGeometric optimization of an ejector for a 4 kW SOFC system with anode off-gas recycle
dc.typeArticle

Dosyalar

Koleksiyon

Scopus İndeksli Yayınlar Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu