Requirements for a Flexible and Realistic Air Supply Model for Incorporation into a Fuel Cell Vehicle (FCV) System Simulation

Cunningham, Joshua; Hoffman, Matthew; Moore, Robert M.; Friedman, David J.

doi:10.4271/1999-01-2912

Cited by 43 publications

(39 citation statements)

References 1 publication

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“…A dynamic air supply model including the fuel cell stack manifold and channels and the compressor was developed and then integrated into the fuel cell system/vehicle model developed by the UCD fuel cell vehicle modeling group [5,11,21]. The system shown in The stack current is used to calculate the hydrogen required.…”

Section: Fuel Cell Systemmentioning

confidence: 99%

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Optimization of fuel cell system operating conditions for fuel cell vehicles

Zhao

Burke

2009

Journal of Power Sources

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Proton Exchange Membrane fuel cell (PEMFC) technology for use in fuel cell vehicles and other applications has been intensively developed in recent decades. Besides the fuel cell stack, air and fuel control and thermal and water management are major challenges in the development of the fuel cell for vehicle applications. The air supply system can have a major impact on overall system efficiency. In this paper a fuel cell system model for optimizing system operating conditions was developed which includes the transient dynamics of the air system with varying back pressure. Compared to the conventional fixed back pressure operation, the optimal operation discussed in this paper can achieve higher system efficiency over the full load range. Finally, the model is applied as part of a dynamic forward-looking vehicle model of a load-following direct hydrogen fuel cell vehicle to explore the energy economy optimization potential of fuel cell vehicles.

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Section: Fuel Cell Systemmentioning

confidence: 99%

“…Fuel cell models at the cell level are presented in [2][3][4]. Studies concerned with optimum operating conditions are discussed in [5][6][7][8][9][10][11][12]. The characteristics of the low pressure and high pressure fuel cell systems are addressed with regard to the system efficiency and transient response in [7,13,14].…”

Section: Introductionmentioning

confidence: 99%

Optimization of fuel cell system operating conditions for fuel cell vehicles

Zhao

Burke

2009

Journal of Power Sources

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“…The compressor air mass flow rate, Wcp, is determined, through a compressor flow map (Allied Signal [16]) which is modeled by the nonlinear curve fitting method described in [17]. The thermodynamic equations are used to calculate exit air temperature, T~p,o~,t, and required compressor power, P~p.…”

Section: Reactant Flow Ratesmentioning

confidence: 99%

“…Although the dynamic FC behavior is not included, these studies established a good basis for understanding the fuel cell vehicle integration. Few papers address the effects of transient variations 1Support is provided by the U.S. Army Center of Excellence for Automotive Research, Contract DAAE07-98- [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] in the fuel cell system performance. Excellent examples are the dominant but slow temperature effects on the stack efficiency [8,9], and the effects of reformed hydrogen/-/2 feed rates in the stack response [10,11].…”

Section: Introductionmentioning

confidence: 99%

Modeling and control for PEM fuel cell stack system

Pukrushpan

Stefanopoulou

Peng

2002

Proceedings of the 2002 American Control Conference (IEEE Cat. No.CH37301)

237

140

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A nonlinear fuel cell system dynamic model that is suitable for control study is presented. The transient phenomena captured in the model include the flow characteristics and inertia dynamics of the compressor, the manifold filling dynamics, and consequently, the reactant partial pressures. Characterization of the Fuel Cell polarization curves based on time varying current, partial oxygen and hydrogen pressures, temperature, membrane hydration allows analysis and simulation of the transient fuel cell power generation. An observer based feedback and feedforward controller that manages the tradeoff between reduction of parasitic losses and fast fuel cell net power response during rapid current (load) demands is designed.

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“…The supply manifold temperature T sm is defined by the ideal gas law (A14). The compressor air flow W cp and its temperature T cp are determined using a nonlinear model for the compressor which has been developed in [19] for an Allied Signals centrifugal compressor that has been used in a fuel cell vehicle [23].…”

Section: Model Of the Fuel Cell Systemmentioning

confidence: 99%

Current Management in a Hybrid Fuel Cell Power System: A Model-Predictive Control Approach

Vahidi

Stefanopoulou

Peng

2006

IEEE Trans. Contr. Syst. Technol.

243

118

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The problem of oxygen starvation in fuel cells coupled with air compressor saturation limits is addressed in this paper. We propose using a hybrid configuration, in which a bank of ultracapacitors supplements the polymer electrolyte membrane fuel cell during fast current transients. Our objective is to avoid fuel cell oxygen starvation, prevent air compressor surge and choke, and simultaneously match an arbitrary level of current demand. We formulate the distribution of current demand between the fuel cell and the bank of ultracapacitors in a model predictive control framework which can handle multiple constraints of the hybrid system. Simulation results show that reactant deficit during sudden increase in stack current is reduced from 50% in stand-alone architecture to less than 1% in the hybrid configuration. In addition the explicit constraint handling capability of the current management scheme prevents compressor surge and choke and maintains the state-of-charge of the ultracapacitor within feasible bounds.

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Requirements for a Flexible and Realistic Air Supply Model for Incorporation into a Fuel Cell Vehicle (FCV) System Simulation

Cited by 43 publications

References 1 publication

Optimization of fuel cell system operating conditions for fuel cell vehicles

Optimization of fuel cell system operating conditions for fuel cell vehicles

Modeling and control for PEM fuel cell stack system

Current Management in a Hybrid Fuel Cell Power System: A Model-Predictive Control Approach

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