Optimal design and operation of dual-ejector PEMFC hydrogen supply and circulation system

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dc.contributor.authorChen, Li
dc.contributor.authorXu, Keda
dc.contributor.authorYang, Zuyong
dc.contributor.authorYan, Zhen
dc.contributor.authorDong, Zuomin
dc.date.accessioned2022-11-04T22:07:43Z
dc.date.available2022-11-04T22:07:43Z
dc.date.copyright2022en_US
dc.date.issued2022
dc.description.abstractA proton exchange membrane fuel cell (PEMFC) system requires an adequate hydrogen supply and circulation to achieve its expected performance and operating life. An ejector-based hydrogen circulation system can reduce the operating and maintenance costs, noise, and parasitic power consumption by eliminating the recirculation pump. However, the ejector’s hydrogen entrainment capability, restricted by its geometric parameters and flow control variability, can only operate properly within a relatively narrow range of fuel cell output power. This research introduced the optimal design and operation control methods of a dual-ejector hydrogen supply/circulation system to support the full range of PEMFC system operations. The technique was demonstrated on a 70 kW PEMFC stack with an effective hydrogen entrainment ratio covering 8% to 100% of its output power. The optimal geometry design ensured each ejector covered a specific output power range with maximized entrainment capability. Furthermore, the optimal control of hydrogen flow and the two ejectors’ opening and closing times minimized the anode gas pressure fluctuation and reduced the potential harm to the PEMFC’s operation life. The optimizations were based on dedicated computational fluid dynamics (CFD) and system dynamics models and simulations. Bench tests of the resulting ejector-based hydrogen supply/circulation system verified the simulation and optimization results.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.identifier.citationChen, L., Xu, K., Yang, Z., Yan, Z., & Dong, Z. (2022). “Optimal design and operation of dual-ejector PEMFC hydrogen supply and circulation system.” Energies, 15(15), 5427. https://doi.org/10.3390/en15155427en_US
dc.identifier.urihttps://doi.org/10.3390/en15155427
dc.identifier.urihttp://hdl.handle.net/1828/14400
dc.language.isoenen_US
dc.publisherEnergiesen_US
dc.subjecthydrogen ejectors
dc.subjectdual-ejector system
dc.subjectPEM fuel cell
dc.subjecthydrogen supply and circulation
dc.subjectCFD simulation
dc.subjectoptimal design
dc.subjectoptimal control
dc.subjectInstitute for Integrated Energy Systems (IESVic)
dc.subject.departmentDepartment of Mechanical Engineering
dc.titleOptimal design and operation of dual-ejector PEMFC hydrogen supply and circulation systemen_US
dc.typeArticleen_US

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