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    Dynamic Simulation of a Stationary Proton Exchange Membrane Fuel Cell System

    Source: Journal of Fuel Cell Science and Technology:;2009:;volume( 006 ):;issue: 004::page 41015
    Author:
    Kyoungdoug Min
    ,
    Fabian Mueller
    ,
    John Auckland
    ,
    Sanggyu Kang
    ,
    Jacob Brouwer
    DOI: 10.1115/1.3008029
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A dynamic model of a stationary proton exchange membrane (PEM) fuel cell system has been developed in MATLAB-SIMULINK ®. The system model accounts for the fuel processing system, PEM stack with coolant, humidifier with anode tail-gas oxidizer, and an enthalpy wheel for cathode air. Four reactors are modeled for the fuel processing system: (1) an autothermal reformation (ATR) reactor, (2) a high temperature shift (HTS) reactor, (3) a low temperature shift (LTS) reactor, and (4) a preferential oxidation reactor. Chemical kinetics for ATR that describe steam reformation of methane and partial oxidation of methane were simultaneously solved to accurately predict the reaction dynamics. The chemical equilibrium of CO with H2O was assumed at HTS and LTS reactor exits to calculate CO conversion corresponding to the temperature of each reactor. A quasi-one-dimensional PEM unit cell was modeled with five control volumes for solving the dynamic species and mass conservation equations and seven control volumes to solve the dynamic energy balance. The quasi-one-dimensional cell model is able to capture the details of membrane electrode assembly behavior, such as water transport, which is critical to accurately determine polarization losses. The dynamic conservation equations, primary heat transfer equations and equations of state are solved in each bulk component, and each component is linked together to represent the complete system. The model predictions well matched the observed experimental dynamic voltage, stack coolant outlet temperature, and catalytic partial oxidation (CPO) temperature responses to perturbations. The dynamic response characteristics of the current system are representative of a typical stationary PEM fuel cell system. The dynamic model is used to develop and test a proportional-integral (PI) fuel flow controller that determines the fuel flow rate to maintain the uniform system efficiency. The dynamic model is shown to be a useful tool for investigating the effects of inlet conditions, load, and fuel flow perturbations and for the development of control strategies for enhancing system performance.
    keyword(s): Fuels , Simulation , Polarization (Electricity) , Coolants , Humidifiers , Fuel cells , Enthalpy , Equations , Fuel processing , Flow (Dynamics) , Temperature , Proton exchange membrane fuel cells , Water , Wheels , System efficiency , Electric potential , Hydrogen , Anodes , Gas diffusion layers , Dynamic models , Membranes , Proton exchange membranes , Heat transfer , Control equipment , Steady state , oxidation AND Chemical kinetics ,
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      Dynamic Simulation of a Stationary Proton Exchange Membrane Fuel Cell System

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    http://yetl.yabesh.ir/yetl1/handle/yetl/140821
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    • Journal of Fuel Cell Science and Technology

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    contributor authorKyoungdoug Min
    contributor authorFabian Mueller
    contributor authorJohn Auckland
    contributor authorSanggyu Kang
    contributor authorJacob Brouwer
    date accessioned2017-05-09T00:33:22Z
    date available2017-05-09T00:33:22Z
    date copyrightNovember, 2009
    date issued2009
    identifier issn2381-6872
    identifier otherJFCSAU-28939#041015_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/140821
    description abstractA dynamic model of a stationary proton exchange membrane (PEM) fuel cell system has been developed in MATLAB-SIMULINK ®. The system model accounts for the fuel processing system, PEM stack with coolant, humidifier with anode tail-gas oxidizer, and an enthalpy wheel for cathode air. Four reactors are modeled for the fuel processing system: (1) an autothermal reformation (ATR) reactor, (2) a high temperature shift (HTS) reactor, (3) a low temperature shift (LTS) reactor, and (4) a preferential oxidation reactor. Chemical kinetics for ATR that describe steam reformation of methane and partial oxidation of methane were simultaneously solved to accurately predict the reaction dynamics. The chemical equilibrium of CO with H2O was assumed at HTS and LTS reactor exits to calculate CO conversion corresponding to the temperature of each reactor. A quasi-one-dimensional PEM unit cell was modeled with five control volumes for solving the dynamic species and mass conservation equations and seven control volumes to solve the dynamic energy balance. The quasi-one-dimensional cell model is able to capture the details of membrane electrode assembly behavior, such as water transport, which is critical to accurately determine polarization losses. The dynamic conservation equations, primary heat transfer equations and equations of state are solved in each bulk component, and each component is linked together to represent the complete system. The model predictions well matched the observed experimental dynamic voltage, stack coolant outlet temperature, and catalytic partial oxidation (CPO) temperature responses to perturbations. The dynamic response characteristics of the current system are representative of a typical stationary PEM fuel cell system. The dynamic model is used to develop and test a proportional-integral (PI) fuel flow controller that determines the fuel flow rate to maintain the uniform system efficiency. The dynamic model is shown to be a useful tool for investigating the effects of inlet conditions, load, and fuel flow perturbations and for the development of control strategies for enhancing system performance.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDynamic Simulation of a Stationary Proton Exchange Membrane Fuel Cell System
    typeJournal Paper
    journal volume6
    journal issue4
    journal titleJournal of Fuel Cell Science and Technology
    identifier doi10.1115/1.3008029
    journal fristpage41015
    identifier eissn2381-6910
    keywordsFuels
    keywordsSimulation
    keywordsPolarization (Electricity)
    keywordsCoolants
    keywordsHumidifiers
    keywordsFuel cells
    keywordsEnthalpy
    keywordsEquations
    keywordsFuel processing
    keywordsFlow (Dynamics)
    keywordsTemperature
    keywordsProton exchange membrane fuel cells
    keywordsWater
    keywordsWheels
    keywordsSystem efficiency
    keywordsElectric potential
    keywordsHydrogen
    keywordsAnodes
    keywordsGas diffusion layers
    keywordsDynamic models
    keywordsMembranes
    keywordsProton exchange membranes
    keywordsHeat transfer
    keywordsControl equipment
    keywordsSteady state
    keywordsoxidation AND Chemical kinetics
    treeJournal of Fuel Cell Science and Technology:;2009:;volume( 006 ):;issue: 004
    contenttypeFulltext
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