Fuel cell/back-up battery hybrid energy conversion systems: Dynamic modeling and harmonic considerations

Fathabadi, Hassan

doi:10.1016/j.enconman.2015.07.010

Cited by 35 publications

(4 citation statements)

References 34 publications

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“…This causes PEMFC have slow dynamics and will exhibit some delay toward fast load variations. Furthermore, Fathabadi (2015) has stated that the reformer or the purifier that is responsible of transforming fuel to pure hydrogen as shown in Figure 2 causes a time delay of several seconds. Purifier's dynamics are estimated to be of first order as it is highlighted in Figure 2 shown below.…”

Section: Fuel Cell Dynamicsmentioning

confidence: 99%

Novel coordinated power sources switching strategy for transient performance enhancement of hybrid electric vehicles

Oubelaid

Taib

Rekioua

2022

COMPEL

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Purpose The purpose of this paper is the investigation of a new coordinated switching strategy to improve the transient performance of a fuel cell (FC)- supercapacitor (SC) electric vehicle. The proposed switching strategy protects FCs from large currents drawn during abrupt power variations. Furthermore, it compensates the poor FC transient response and suppresses the transient ripples occurring during power source switching instants. Design/methodology/approach Coordinated power source switching is achieved using three different transition functions. Vehicle model is fractioned into computational and console subsystems for its simulation using real time (RT) LAB simulator. Blocs containing coordination switching strategy, power sources models and their power electronics interface are placed in the computational subsystem that will be executed, in RT, on one of real time laboratory simulator central processing unit cores. Findings Coordination switching strategy resulted in reducing transient power ripples by 90% and direct current (DC) bus voltage fluctuations by 50%. Switching through transition functions compensated the difference between FC and SC transient responses responsible for transient power ripples. Among the three proposed transition functions, linear transition function resulted in the best transient performances. Originality/value The proposed coordinated switching strategy allows the control of the switching period duration. Furthermore, it enables the choice of adequate transition functions that fit the dynamics of power sources undergoing transition. Also, the proposed switching technique is simple and does not require the knowledge of system parameters or the complex control models.

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Section: Fuel Cell Dynamicsmentioning

confidence: 99%

Novel coordinated power sources switching strategy for transient performance enhancement of hybrid electric vehicles

Oubelaid

Taib

Rekioua

2022

COMPEL

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“…Most fuel cells use a proton exchange membrane (PEM) to carry out the electrochemical reactions. [11][12][13][14][15][16][17][18][19][20][21][22][23][24] However, in spite of providing a higher energy density at lower operational temperature, membrane fuel cells have multiple issues, such as the PEM cost, fuel crossover, hydration of dehydrated PEMs, PEM shrinkage, and degradation. [14][15][16][17][18] PEM-related issues have been resolved with the development of membraneless microfluidic fuel cells (MMFCs).…”

Section: Introductionmentioning

confidence: 99%

“…Fuel cells have no emissions, better energy density, 10 and could supply power in applications ranging from miniature electronic devices to big plants. Most fuel cells use a proton exchange membrane (PEM) to carry out the electrochemical reactions 11‐24 . However, in spite of providing a higher energy density at lower operational temperature, membrane fuel cells have multiple issues, such as the PEM cost, fuel crossover, hydration of dehydrated PEMs, PEM shrinkage, and degradation 14‐18 …”

Section: Introductionmentioning

confidence: 99%

A membraneless microfluidic fuel cell with a hollow flow channel and porous flow‐through electrodes

Tanveer

Kim

2021

Int J Energy Res

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A novel flow channel configuration of a membraneless microfluidic fuel cell (MMFC) with porous flow-through electrodes was investigated numerically. A numerical model was developed for the electrochemical analysis and validated using experimental data. The physical phenomena involved in the microfluidic fuel cell including the flow of the vanadium redox couple (oxidant and fuel), mass transport, and electrochemical reaction kinetics at the electrodes are coupled in the numerical model. Considering the impact of diffusive mixing zone on the performance of MMFC, a hollow structure is proposed for the cross-section of the central flow channel. The hollow structure showed a peak power density, which is higher than those of the H-shaped, simple bridgeshaped, and rectangular channels by 6%, 18%, and 82%, respectively. Highlights• Numerical model of an MMFC with flow-through porous electrodes was validated using experimental data.• MMFC with flow through electrodes was investigated for various channel configurations.• Hollow flow channel coupled with porous electrodes performed best at critical height ratio.

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“…The water electrolyzer for hydrogen production is the key equipment and bottleneck of direct energy flow between the hydrogen production system and the fluctuating power source . When it is used to damp the fluctuation of a renewable energy source, its basic theory and key technology are similar to that of other energy storage media or smart loads .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the external electrical thermal and dynamic power characteristics of alkaline water electrolyzer

Shen

Zhang

et al. 2018

Int J Energy Res

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Summary As hydrogen production with a water electrolyzer is an effective way for renewable energy consumption, understanding the external electrical characteristics of water electrolyzer is of great significance for the modeling and simulation, system configuration, and control strategy of the system for hydrogen production by renewable energy. However, there are relatively fewer studies in this area. This paper presents the establishment of an experimental platform to conduct an experimental study on the static and dynamic voltage‐current characteristics and analyze the adjustability of the electric power of the traditional alkaline water electrolyzer, the relationship between the electrical characteristics and the electrolyte temperature, and operating point of the alkaline water electrolyzer. In addition, the mathematical fitting problem of the electrical characteristics of the alkaline water electrolyzer is discussed. The work could supply a reference to alkaline water electrolyzer intergrated application in renewable energy.

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Fuel cell/back-up battery hybrid energy conversion systems: Dynamic modeling and harmonic considerations

Cited by 35 publications

References 34 publications

Novel coordinated power sources switching strategy for transient performance enhancement of hybrid electric vehicles

Novel coordinated power sources switching strategy for transient performance enhancement of hybrid electric vehicles

A membraneless microfluidic fuel cell with a hollow flow channel and porous flow‐through electrodes

Experimental study on the external electrical thermal and dynamic power characteristics of alkaline water electrolyzer

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