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Research Papers

Optimal Design of Hybrid Fuel Cell Vehicles

[+] Author and Article Information
Jeongwoo Han

Department of Mechanical Engineering, University of Michigan, 2350 Hayward, Ann Arbor, MI 48109jwhan@umich.edu

Michael Kokkolaras

Department of Mechanical Engineering, University of Michigan, 2350 Hayward, Ann Arbor, MI 48109mk@umich.edu

Panos Y. Papalambros

Department of Mechanical Engineering, University of Michigan, 2350 Hayward, Ann Arbor, MI 48109pyp@umich.edu

J. Fuel Cell Sci. Technol 5(4), 041014 (Sep 11, 2008) (8 pages) doi:10.1115/1.2890106 History: Received October 26, 2006; Revised June 06, 2007; Published September 11, 2008

Automotive use of fuel cells has received increased attention due to clean and efficient power generation. Successful vehicular applications require careful balance of design and control trade-offs. This article presents a model-based vehicle design capability with sufficient fidelity and efficiency to perform design and power management optimization using quasisteady fuel cell performance maps. Optimized fuel cell systems demonstrate a trade-off between power density and efficiency depending on compressor size. Vehicle performance can be improved significantly when the fuel cell system is designed to balance this trade-off.

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Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Reactant supply subsystems (modified from Ref. 12)

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Figure 2

Diagram of reactant flows in a PEM fuel cell

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Figure 3

SIMULINK model of hybrid electric FC vehicles with a regenerative brake module

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Figure 4

Process integration

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Figure 5

Surge and control lines on a compressor map

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Figure 6

Comparison of results of FC vehicle simulator with a full dynamic FC model and a quasisteady FC model

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Figure 7

Oxygen excess ratio during the cycle and transient response on the compressor map

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Figure 8

Simulation of a hybrid electric FC vehicle model with/without regenerative braking

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Figure 9

Operating points of the FC systems optimized for different objectives plotted on the compressor efficiency map

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Figure 10

Efficiency versus power ratio and stack current of the FC systems optimized for different objectives

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