Balancing Stack, Air Supply, and Water/Thermal Management Demands for an Indirect Methanol PEM Fuel Cell System

Friedman, David J.; Eggert, Anthony; Badrinarayanan, P.; Cunningham, Joshua

doi:10.4271/2001-01-0535

Cited by 23 publications

(7 citation statements)

References 7 publications

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“…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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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: 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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“…Fuel cell (propulsion) system models in the literature are mostly steady-state models which are typically used for component sizing [3,4,5], cumulative fuel consumption or bybridization studies [6], and forward-looking simulation models [7]. These models represent each component such as compressor, heat exchanger and fuel cell stack voltage as a static performance or efficiency map.…”

Section: Introductionmentioning

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)

230

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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“…In contrast, the heat load in the intercooler in Figure 9b (with condenser) has negative impacts; that is, the demand of the heating becomes large, and the reactant needs energy to evaporate liquid water. As revealed in references [16] and [17] at low operating pressure, the heating demand is too large (around 40 kW) to be balanced in the 100-kW PEMFCs systems.…”

Section: Resultsmentioning

confidence: 99%

Analysis of Proton Exchange Membrane Fuel Cell Systems Involving Heat Exchangers

Sundén

Yuan

2013

Heat Transfer Engineering

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Proton-exchange membrane fuel cells (PEMFCs) have been regarded as the new energy source for portable, stationary, and automotive applications. However, commercial exploitation of PEMFCs is still in an early stage, due to shortage of infrastructure in the society, high cost, and particularly the difficulty of the water/thermal management. One of the objectives of the current work is to analyze the water/thermal balances in a 100-kW class PEMFC system, consisting of PEMFC stack, compressor, intercooler, heater, humidifier, condenser, and radiator. As a first step, the heat and mass balances in the heat exchangers are analyzed for various water recovery schemes, followed by an analysis of the PEMFC stack effects on the system balance concerning the pressure drop and operating current density.

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Balancing Stack, Air Supply, and Water/Thermal Management Demands for an Indirect Methanol PEM Fuel Cell System

Cited by 23 publications

References 7 publications

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

Analysis of Proton Exchange Membrane Fuel Cell Systems Involving Heat Exchangers

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