Reliability assessment of a continuous-state fuel cell stack system with multiple degrading components
- Authors
- Yuan, Tao; Wu, Xinying; Bae, Suk Joo; Zhu, Xiaoyan
- Issue Date
- Sep-2019
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Continuous-state systems; Degradation analysis; Failure-time distribution; Gibbs sampling; Hierarchical Bayesian modeling; k-out-of-m:Fsystem
- Citation
- RELIABILITY ENGINEERING & SYSTEM SAFETY, v.189, pp.157 - 164
- Indexed
- SCIE
SCOPUS
- Journal Title
- RELIABILITY ENGINEERING & SYSTEM SAFETY
- Volume
- 189
- Start Page
- 157
- End Page
- 164
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/147180
- DOI
- 10.1016/j.ress.2019.04.021
- ISSN
- 0951-8320
- Abstract
- A polymer electrolyte membrane fuel cell (PEMFC) stack is a multi-component system composed of continuously degrading fuel cells. The voltage degradation of the fuel cells causes the degradation of the stack system, which has two system-level degradation measures; the overall stack output voltage and the minimum voltage of individual cells. This paper develops a hierarchical Bayesian modeling and data analysis method to predict the reliability of a PEMFC stack system using the voltage degradation data collected from its fuel cell components. We introduce a two-term exponential model to describe the nonlinear voltage degradation paths of the fuel cell components, then builds a hierarchical Bayesian degradation model to predict the stack system reliability by taking a k-out-of-m:F system into account. Possible alternative modeling approaches are discussed with an in-depth comparison. This paper will contribute to the modeling and data analysis methods for continuous-state systems composed of continuous-state components.
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