Nonlinear Thermal Modelling and Control of a PEM Fuel Cell Stack
The purpose of this paper is to present a nonlinear control method for accurately maintaining coolant temperature within a proton exchange membrane (PEM) fuel cell stack by controlling coolant flow ra...
The purpose of this paper is to present a nonlinear control method for accurately maintaining coolant temperature within a proton exchange membrane (PEM) fuel cell stack by controlling coolant flow ra...
Thermodynamic View on the Loss Mechanisms in PEM-Fuel Cells
The fuel cell, which is a highly promising candidate for high efficiency energy conversion, is not reaching expected conversion efficiencies of > 0,5 yet. Parallel to standard explanations of loss...
The fuel cell, which is a highly promising candidate for high efficiency energy conversion, is not reaching expected conversion efficiencies of > 0,5 yet. Parallel to standard explanations of loss...
Analysis, Modeling, and Validation for the Thermal Dynamics of a Polymer Electrolyte Membrane Fuel Cell System
Paper no. FUELCELL2005-74050 pp. 389-404 (16 pages)
doi:10.1115/FUELCELL2005-74050
ASME 2005 3rd International Conference on Fuel Cell Science, Engineering and Technology
(FUELCELL2005)
May 23–25, 2005 , Ypsilanti, Michigan, USA Sponsor: Nanotechnology Institute
May 23–25, 2005 , Ypsilanti, Michigan, USA Sponsor: Nanotechnology Institute
3rd International Conference on Fuel Cell Science, Engineering and Technology
ISBN: 0-7819-3764-5
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A control-oriented mathematical model of a polymer electrolyte membrane (PEM) fuel cell stack is developed and experimentally verified. The model predicts the bulk fuel cell transient temperature and voltage as a function of the current drawn and the inlet coolant conditions. The model enables thermal control synthesis and optimization and can be used for estimating the system performance. Unlike other existing thermal models, it includes the gas supply system, which is assumed to be capable of controlling perfectly the excess air and hydrogen ratio. The fuel cell voltage is calculated quasi-statically. Measurement data of a 1.25 kW, 24-cell fuel cell stack with an integrated membrane-type humidification section is used to identify the system parameters and to validate the performance of the simulation model. The predicted thermal response is verified during typical variations in load, coolant flow, and coolant temperature. A first-law control volume analysis is performed to separate the relevant from the negligible contributions to the thermal dynamics and to determine the sensitivity of the energy balance to sensor errors and system parameter deviations.
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