PEM Electrolysis for Hydrogen Production

Bessarabov, Dmitri; Wang, Haijiang Henry; Li, Hui; Zhao, Nana

doi:10.1201/b19096

Cited by 77 publications

(14 citation statements)

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“…It should be included in the model for a system having higher current density. Nernst equation is used to define the overpotential due to diffusion and it reveals that the diffusion limitation increases with increase in concentration of the product species at the reaction interface [42].…”

Section: Electrochemical Sub-model Of the Stackmentioning

confidence: 99%

“…The parameter γ value varies from 14 to 25, whose value depends on the nature of membrane hydration. For a poorly hydrated membrane, it is taken as 14 while for fully hydrated it is taken as 25 [42].…”

Section: Electrochemical Sub-model Of the Stackmentioning

confidence: 99%

“…Thus, the efficiency can be defined as the ratio of energy or power content of the hydrogen produced based on HHV or LHV and the input electrical energy or power to the system. Usually, HHV is preferred over LHV to calculate the efficiency of an electrolysis system supplied with liquid water, as the enthalpy of evaporation has to be provided by the process and it is represented as in Equation ( 49) [42].…”

Section: Efficiency Of Cell/stackmentioning

confidence: 99%

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Generic Dynamical Model of PEM Electrolyser under Intermittent Sources

et al. 2020

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Proton Exchange Membrane (PEM) water electrolysis system is one of the promising technologies to produce green hydrogen from renewable energy sources (wind and solar). However, performance and dynamic analysis of PEM water electrolysis systems are challenging due to the intermittent nature of such sources and involved multi-physical behaviour of the components and subsystems. This study proposes a generic dynamical model of the PEM electrolysis system represented in a modular fashion using Bond Graph (BG) as a unified modelling approach. Causal and functional properties of the BG facilitate the formal PEM electrolyser model to adapt and to fit the different configurations of the electrolyser ranging from laboratory scale to industrial scale. The system-specific key parameter values are identified optimally for a laboratory-scale electrolyser system running on a multi-source energy platform using experimental data. The mean absolute percentage error between simulation and experimental data is found to be less than 5%. The performance characteristic curves of the electrolyser are predicted at different operating temperatures using the identified key parameters. The predicted performance is in good agreement with the expected behaviour of the electrolyser found in the literature. The model also estimates the different energy losses and the real-time efficiency of the system under dynamic inputs. With these capabilities, the developed model provides an economical mean for design, control, and diagnosis development of such systems.

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Section: Electrochemical Sub-model Of the Stackmentioning

confidence: 99%

Section: Electrochemical Sub-model Of the Stackmentioning

confidence: 99%

Section: Efficiency Of Cell/stackmentioning

confidence: 99%

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Generic Dynamical Model of PEM Electrolyser under Intermittent Sources

et al. 2020

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“…The gauge pressure of the cathode side determines the outlet pressure of the device. Thus, an EHC cell performs hydrogen separation and compression in a single electrochemical step [10,11] .…”

Section: The Principle Of Electrochemical Hydrogen Purification and Cmentioning

confidence: 99%

“…Possible sources of hydrogen are industrial waste gas streams and biogas production [5,6] or the recycling of hydrogen waste gas from the semiconductor industry [7]. The operating principle is a combination of a fuel cell anode and an electrolyzer cathode [8][9][10][11]. To meet a competitive cost target, the stack is assembled from stamped metallic flow field plates, as recently discussed with respect to fuel cell applications [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

An Engineering Toolbox for the Evaluation of Metallic Flow Field Plates

et al. 2019

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Metallic flow field plates, also called bipolar plates, are an important component of fuel cell stacks, electrolyzers, hydrogen purification and compression stacks. The manufacturing of these plates by means of stamping or hydroforming is highly suitable for mass production. In this work, a toolbox is created that is suitable for a screening process of different flow field design variants. For this purpose, the geometry and computational mesh are generated in an automated manner. Basic building blocks are combined using the open source software SALOME, and these allow for the construction of a large variant of serpentine-like flow field structures. These geometric variants are evaluated through computational fluid dynamics (CFD) simulations with the open source software OpenFOAM. The overall procedure allows for the screening of more than 100 variants within one week using a standard desktop computer. The performance of the flow fields is evaluated on the basis of two parameters: the overall pressure difference across the plate and the relative difference of the hydrogen concentration at the outlet of the channels. The results of such a screening first provide information about optimum channel geometry and the best choice of the general flow field layout. Such results are important at the beginning of the design process, as the channel geometry has an influence on the selection of the metal for deep drawing or hydroforming processes.

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Inorganic Synthesis

2017

Sustainable and Green Electrochemical Science and Technology

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PEM Electrolysis for Hydrogen Production

Cited by 77 publications

References 0 publications

Generic Dynamical Model of PEM Electrolyser under Intermittent Sources

Generic Dynamical Model of PEM Electrolyser under Intermittent Sources

An Engineering Toolbox for the Evaluation of Metallic Flow Field Plates

Inorganic Synthesis

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