Global parameters sensitivity analysis and development of a two-dimensional real-time model of proton-exchange-membrane fuel cells

Zhou, Daming; Nguyen, Thu Trang; Breaz, Elena; Zhao, Dongdong; Clénet, S.; Gao, Fei

doi:10.1016/j.enconman.2018.02.036

Cited by 62 publications

(37 citation statements)

References 30 publications

(28 reference statements)

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“…4 (bottom) in methanol concentrations, which is mainly caused by the parallel serpentine arrangement of flow channel in DMFC systems [33,36]. It coincides very well with previous revealing, and more discussions about the effects of channel geometric patterns can be available in [32,41].…”

Section: Numerical Analysissupporting

confidence: 88%

Adaptive Operation Strategy for Voltage Stability Enhancement in Active DMFCs

Yang¹,

Hu²,

Lei³

et al. 2018

Preprint

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An adaptive operation strategy for on-demand control of active direct methanol fuel cells (DMFCs) is proposed as an alternative method to enhance the voltage stability. A simplified semi-empirical model is firstly developed to describe I-V relationships based on uniform-designed experiments. It is then embedded into multi-objective optimizations to construct the adaptive operation strategy.Experimental studies are implemented on different DMFC systems to validate the proposed semi-empirical model, control strategy and system response to operational adjustments. Numerical simulations are also performed to investigate the underlying mechanisms of the proposed adaptive operation strategy. The results show that the adaptive operation strategy provides possibilities for voltage stability enhancement without the sacrifice of energy conversion efficiency.The adaptive operations are also found to be able to extend the range of operating current density or to decrease the voltage deviation according to ones

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Section: Numerical Analysissupporting

confidence: 88%

Adaptive Operation Strategy for Voltage Stability Enhancement in Active DMFCs

Yang¹,

Hu²,

Lei³

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…For a rigorous study of technology performance parameter effects on the Quantity of Interest (QoI) (e.g., degree of hybridization, total mass of the energy system, etc. ), the analysis of parameter sensitivities is an effective tool (Laoun et al, 2016;Zhao and Howey, 2016;Lin et al, 2018;Zhou et al, 2018). As local sensitivity measures address the effect of individual parameters under the simplifying assumption of linear "causeeffect" relations (Campolongo et al, 2000;Morio, 2011), the global sensitivity analysis (GSA) is the method of choice in this study.…”

Section: Sensitivity Analysismentioning

confidence: 99%

Design of Fuel Cell Systems for Aviation: Representative Mission Profiles and Sensitivity Analyses

et al. 2019

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The global transition to a clean and sustainable energy infrastructure does not stop at aviation. The European Commission defined a set of environmental goals for the "Flight Path 2050": 75% CO 2 reduction, 90% NO x reduction, and 65% perceived noise reduction. Hydrogen as an energy carrier fulfills these needs, while it would also offer a tenable and flexible solution for intermittent, large-scale energy storage for renewable energy networks. If hydrogen is used as an energy carrier, there is no better device than a fuel cell to convert its stored chemical energy. In order to design fuel cell systems for passenger aircraft, it is necessary to specify the requirements that the system has to fulfill. In this paper, a statistical approach to analyze these requirements is presented, which accounts for variations in the flight mission profile. Starting from a subset of flight data within the desired class (e.g., mid-range inter-European flights) a stochastic model of the random mission profile is inferred. This model allows for subsequent predictions under uncertainty as part of the aircraft design process. By using Monte Carlo-based sampling of flight mission profiles, the range of necessary component sizes, as well as optimal degrees of hybridization with a battery, is explored, and design options are evaluated. Furthermore, Monte Carlo-based sensitivity analysis of performance parameters explores the potential of future technological developments. Results suggest that the improvement of the specific power of the fuel cell is the deciding factor for lowering the energy system mass. The specific energy of the battery has a low influence but acts in conjunction with the specific power of the fuel cell.

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“…In order to ensure that the database can resist attacks, an effective marking algorithm must have strong robustness. Inspired by literature, [15][16][17] in this article, a one-way hash function is used as the marking algorithm, which always outputs a fixed length hash value for a certain length of input message, and the hash function is characterized by the easy computation of the forward calculation, and the difficulty of the reverse computer is greatly improved ( Figure 5).…”

Section: Generation Of Watermark Independent Component and Marking Ofmentioning

confidence: 99%

Research on database watermarking based on Independent Component Analysis and multiple rolling

Cao

Shi

2019

International Journal of Distributed Sensor Networks

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Digital watermarking is an important branch of information hiding technology research field. It is a technology that embeds identifiable data into digital works. In order to protect the copyright of digital products, the basic idea is to embed confidential information in digital products such as images, audio, and video to realize data fusion. The current digital watermarking technology is mainly concentrated in the field of multimedia information (such as images, audio, and video) and made good progress. In this article, based on the large database capacity, and much numerical data characteristics, we proposed a separate component analysis on the database watermarking method. First, this article uses a oneway hash function as the marking algorithm to determine the tuple according to the user's given key, the tuple primary key value, and the tuple scale that needs to be marked. Then the watermark is extracted through the key, and the watermarked information is taken out in the database. The matrix is separated by the ratio Independent Component Analysis algorithm, and the watermark is used to separate the matrix. This kind of watermark information is rolled up, and the information in the original database is kept independent of each other, and the embedded watermark information is changed by the smaller carrier. The Independent Component Analysis method is used to extract the watermark image, and the ratio Independent Component Analysis method is used to solve the problem of the influence of the uncertainty of the arrangement order. The experimental results show that the proposed method has a good detection effect.

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Global parameters sensitivity analysis and development of a two-dimensional real-time model of proton-exchange-membrane fuel cells

Cited by 62 publications

References 30 publications

Adaptive Operation Strategy for Voltage Stability Enhancement in Active DMFCs

Adaptive Operation Strategy for Voltage Stability Enhancement in Active DMFCs

Design of Fuel Cell Systems for Aviation: Representative Mission Profiles and Sensitivity Analyses

Research on database watermarking based on Independent Component Analysis and multiple rolling

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