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Analysis Tool for Fuel Cell Vehicle Hardware and Software (Controls) with an Application to Fuel Economy Comparisons of Alternative System Designs

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  • Hauer , Karl-Heinz

Abstract

In the area of analysis, a modeling tool for fuel cell vehicles needs to address the transient dynamic interaction between the electric drive train and the fuel cell system. Especially for vehicles lacking an instantaneously responding on-board fuel processor, this interaction is very different from the interaction between a battery (as power source) and an electric drive train in an electric vehicle design. Non-transient modeling leads to inaccurate predictions of vehicle performance and fuel consumption. Applied in the area of development, the existing programs do not support the employment of newer techniques, such as rapid prototyping. This is because the program structure merges control algorithms and component models, or different control algorithms are lumped together in one single control block and not assigned to individual components as they are in real vehicles. In both cases, the transfer of control algorithms from the model into existing hardware is not possible. The simulation program developed in this dissertation recognizes the dynamic interaction between fuel cell system, drive train and optional additional energy storage. It provides models for four different fuel cell vehicle topologies: 1) A load following fuel cell vehicle; 2) A battery hybrid fuel cell vehicle; 3) An ultra-capacitor hybrid fuel cell vehicle in which the ultra-capacitor unit is coupled via a dc-dc converter to the stack; 4) An ultra-capacitor hybrid fuel cell vehicle with direct coupling between fuel cell stack and ultra-capacitor. The structure of the model is a causal and forward-looking. The model separates the modeling of control algorithms from the component models. The setup is strictly modular and encourages the use of rapid prototyping techniques in the development process. The first half of the dissertation explains the model setup. In the second half of the dissertation, the simulation of different hybrid vehicle designs illustrates the capabilities of the model.

Suggested Citation

  • Hauer , Karl-Heinz, 2001. "Analysis Tool for Fuel Cell Vehicle Hardware and Software (Controls) with an Application to Fuel Economy Comparisons of Alternative System Designs," Institute of Transportation Studies, Working Paper Series qt52g0c03n, Institute of Transportation Studies, UC Davis.
  • Handle: RePEc:cdl:itsdav:qt52g0c03n
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    Cited by:

    1. Sundaresan, Meena, 2004. "A Thermal Model to Evaluate Sub-Freezing Startup for a Direct Hydrogen Hybrid Fuel Cell Vehicle Polymer Electrolyte Fuel Cell Stack and System," Institute of Transportation Studies, Working Paper Series qt2tv631c3, Institute of Transportation Studies, UC Davis.
    2. Sundaresan, Meena, 2004. "A Thermal Model to Evaluate Sub-Freezing Startup for a Direct Hydrogen Hybrid Fuel Cell Vehicle Polymer Electrolyte Fuel Cell Stack and System," Institute of Transportation Studies, Working Paper Series qt0d66g2cn, Institute of Transportation Studies, UC Davis.
    3. Zaid O. Alrayes & Mohamed Gadalla, 2021. "Development of a Flexible Framework Multi-Design Optimization Scheme for a Hand Launched Fuel Cell-Powered UAV," Energies, MDPI, vol. 14(10), pages 1-27, May.
    4. Contadini, Jose F., 2002. "Life Cycle Assessment of Fuel Cell Vehicles - Dealing with Uncertainties," Institute of Transportation Studies, Working Paper Series qt9gz1s67d, Institute of Transportation Studies, UC Davis.
    5. Uzunoglu, M. & Onar, O.C. & Alam, M.S., 2009. "Modeling, control and simulation of a PV/FC/UC based hybrid power generation system for stand-alone applications," Renewable Energy, Elsevier, vol. 34(3), pages 509-520.

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    Engineering;

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