Improved dynamic performance of hybrid PEM fuel cells and ultracapacitors for portable applications

Yalçınöz, Tankut; Alam, Mohammad Saad

doi:10.1016/j.ijhydene.2008.01.027

Cited by 68 publications

(22 citation statements)

References 34 publications

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“…While the above mentioned systems have shown to serve sensor network application scenarios where the solar energy is available and loads commonly have very low duty cycles (the experiments are typically for the 1%-5% duty cycles) they are not suitable for many mobile application scenarios with higher workloads. Hybrid systems based on supercapacitors, batteries, or fuel cells were proposed [1], [11], [12], but exact models, detailed optimizations, or results for portable systems were not provided.…”

Section: Related Workmentioning

confidence: 99%

HypoEnergy. Hybrid supercapacitor-battery power-supply optimization for Energy efficiency

Mirhoseini

Koushanfar

2011

2011 Design, Automation &Amp; Test in Europe

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Abstract-This paper presents HypoEnergy, a framework for extending the hybrid battery-supercapacitor power supply lifetime. HypoEnergy combines high energy density and reliable workload supportability of an electrochemical battery with high power density and high number of recharge cycles of supercapacitors. The lifetime optimizations consider nonlinear battery characteristics and supercapacitors' charging overhead. HypoEnergy-KI studies the hybrid supply lifetime optimization for a preemptively known workload and for one ideal supercapacitor. We show a mapping of HypoEnergy-KI to the multiplechoice knapsack problem and use dynamic programming to address the problem. HypoEnergy-KN considers the optimization for the known workload but in the case of having a nonideal supercapacitor bank that leaks energy. Evaluations on iPhone load measurements demonstrate the efficiency and applicability of the HypoEnergy framework in extending the system's lifetime.

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Section: Related Workmentioning

confidence: 99%

HypoEnergy. Hybrid supercapacitor-battery power-supply optimization for Energy efficiency

Mirhoseini

Koushanfar

2011

2011 Design, Automation &Amp; Test in Europe

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“…The DC-DC converter employed in this simulation is different from the usual ones, which are simple topologies without galvanic isolation [1][2][3][4][5][6]. Indeed, in order to fulfill the telecommunications equipment requirements, galvanic isolation is required.…”

Section: Contribution To Technological Innovationmentioning

confidence: 99%

“…The fuel cell model and its parameters were taken from [1][2][3][4][5][6] and they have been used to simulate innumerous standalone applications like portable equipments (laptops, for example) [1], residential houses [2,3], vehicles [4], and hybrid power generation plants [5,6]. The model has been implemented in the Matlab-Simulink …”

Section: Fuel Cell System Simulationmentioning

confidence: 99%

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Fuel Cell Systems for Telecommunications

Ribeiro

Cardoso

Boccaletti

2010

IFIP Advances in Information and Communication Technology

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Abstract. Standalone power systems for telecommunications are becoming an emergent need, due to environmental problems and their current tendency to be localized in remote places. Along with photovoltaic and wind generators, fuel cells are one of the most mature technologies to be employed in this kind of systems. As they are expensive and complex systems, it is important to simulate their behaviour to study different operating modes. This paper intends to propose a simulation of a fuel cell system with a voltage-fed full-bridge converter in the Matlab-Simulink © environment fulfilling the strict telecommunications equipment requirements.

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“…The real output voltage of the fuel cell stack expresses Nernst voltage that is decreased by overpotentials [5]. The mentioned overpotentials represent the voltage losses of the fuel cell stack and moreover the size of the losses influences the efficiency of the full cell stack significantly:…”

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confidence: 99%

The definition of input parameters for modelling of energetic subsystems

Ptacek

2013

EPJ Web of Conferences

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Summary. -This paper is a short review and a basic description of mathematical models of renewable energy sources which present individual investigated subsystems of a system created in Matlab/Simulink. It solves the physical and mathematical relationships of photovoltaic and wind energy sources that are often connected to the distribution networks. The fuel cell technology is much less connected to the distribution networks but it could be promising in the near future. Therefore, the paper informs about a new dynamic model of the low-temperature fuel cell subsystem, and the main input parameters are defined as well. Finally, the main evaluated and achieved graphic results for the suggested parameters and for all the individual subsystems mentioned above are shown.

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Improved dynamic performance of hybrid PEM fuel cells and ultracapacitors for portable applications

Cited by 68 publications

References 34 publications

HypoEnergy. Hybrid supercapacitor-battery power-supply optimization for Energy efficiency

HypoEnergy. Hybrid supercapacitor-battery power-supply optimization for Energy efficiency

Fuel Cell Systems for Telecommunications

The definition of input parameters for modelling of energetic subsystems

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