The influence of dynamic load changes on temporary impedance in hydrogen fuel cells, selection and validation of the electrical equivalent circuit

Darowicki, Kazimierz; Janicka, Ewa; Mielniczek, Michal; Zieliński, A.; Gawel, L.; Mitzel, Jens; Hunger, Jürgen

doi:10.1016/j.apenergy.2019.113396

Cited by 21 publications

(4 citation statements)

References 28 publications

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“…EIS allows the differentiation between nominal operation and operation under critical conditions, such as flooding, dryout or reactant starvation [37,38]. Furthermore, EIS devices using multiple, parallel channels can be used to identify inhomogeneous operation of individual cells.…”

Section: Impedance Setupmentioning

confidence: 99%

Fault Diagnostics in PEMFC Stacks by Evaluation of Local Performance and Cell Impedance Analysis

et al. 2020

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Starvation, flooding, and dry‐out phenomena occur in polymer electrolyte membrane fuel cells (PEMFCs), due to heterogeneous local conditions, material inhomogeneity, and uneven flow distribution across the single cell active area and in between the individual cells. The impact of the load level and air feed conditions on the performance was identified for individual single cells within a 10‐cell stack. Analysis of the current density distribution across the active area at the cell level was correlated with electrochemical impedance spectroscopy to enable operando fault diagnostic without any impact of the applied analytical tools on the single cell behavior. Moreover, the combination of both technologies allows in‐depth analysis of fault mechanisms in fuel cell single cells with improved sensitivity. Current density distribution and the quantitative assessment of the performance homogeneity demonstrated high sensitivity to small humidity changes and allow the detection of critical events, such as dry‐out in single cells. Impedance analysis is more sensitive regarding polarization and diffusion limitations and allows detection of cell flooding. The combination of both techniques is required for reliable identification of air starvation faults.

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Section: Impedance Setupmentioning

confidence: 99%

Fault Diagnostics in PEMFC Stacks by Evaluation of Local Performance and Cell Impedance Analysis

et al. 2020

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“…Evidently, the performance losses up to 1.5 A cm -2 are fully mitigated and increase sharply only upon further increasing the current density. On-line fault diagnostics and state-of-health monitoring Electrochemical Impedance Spectroscopy (EIS) represents an established method for on-line fault monitoring in PEMFC stacks [23,24]. This analysis technique can provide detailed information about different processes in the stack during operation and enables the differentiation between nominal operation and operation under critical conditions, such as flooding, dry-out or reactant starvation.…”

Section: Accelerated Stress Testsmentioning

confidence: 99%

Operando and Ex-Situ Investigation of PEMFC Degradation

Gazdzicki¹,

Mitzel²,

Sánchez³

et al. 2019

ECS Trans.

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Longevity is one of key requirements of PEMFC for automotive applications. Hence, understanding degradation phenomena and durability limitations is fundamental to increase PEMFC life time and to make this technology competitive In this contribution a selection of our recent work on these topics is presented. In particular, attention in dedicated to study effect of performance limitations at low Pt loadings and to investigate impact of operation conditions on local degradation phenomena such as drying, contaminations or heterogeneities during dynamic operation. Moreover, specific operando accelerated stress tests are being developed and the relative impact on various stressors on individual MEA components is studied. Eventually, we present results related to on-line fault monitoring using current density distribution measurements linked with impedance spectroscopy.

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“…Proton Exchange Membrane (PEM) Fuel Cells, fed by pure H2, represent the most promising technology, thanks to their compactness, fast answer to load variations and zero impact in terms of emissions. These features recently encouraged researchers to investigate solutions for PEM Fuel Cells and hybrid systems modelling [18][19] [20][21] [22], also considering dynamic conditions [23] [24].…”

Section: Introductionmentioning

confidence: 99%

Comparison of different control strategies for PEM fuel cells thermal management system for Zero Emission Ship (ZEUS) onboard power generation

Cavo¹,

Cavo²,

Rivarolo³

et al. 2022

Preprint

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The present paper aims to analyse the thermal coupling of PEM fuel cells fed by hydrogen, stored in metal hydride tanks for maritime applications, considering the first Italian zero emissions ship with hydrogen PEM fuel cells propulsion (ZEUS), launched in 2022. A dynamic model is developed, and the integrated propulsion system is analysed in different operative conditions, considering the transitory that can be experimented during navigation (i.e., from harbour to cruise speed). The behaviour of the fuel cells in dynamic conditions is investigated, considering two different control systems, based on PID and Model Predictive Control approaches.

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The influence of dynamic load changes on temporary impedance in hydrogen fuel cells, selection and validation of the electrical equivalent circuit

Cited by 21 publications

References 28 publications

Fault Diagnostics in PEMFC Stacks by Evaluation of Local Performance and Cell Impedance Analysis

Fault Diagnostics in PEMFC Stacks by Evaluation of Local Performance and Cell Impedance Analysis

Operando and Ex-Situ Investigation of PEMFC Degradation

Comparison of different control strategies for PEM fuel cells thermal management system for Zero Emission Ship (ZEUS) onboard power generation

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