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    A Controllable Membrane-Type Humidifier for Fuel Cell Applications—Part II: Controller Design, Analysis and Implementation

    Source: Journal of Fuel Cell Science and Technology:;2011:;volume( 008 ):;issue: 001::page 11004
    Author:
    Denise A. McKay
    ,
    Anna G. Stefanopoulou
    ,
    Jeffrey Cook
    DOI: 10.1115/1.4001020
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A membrane-based gas humidification apparatus was employed to actively manage the amount of water vapor entrained in the reactant gas supplied to a fuel cell stack. The humidification system utilizes a gas bypass and a series of heaters to achieve accurate and fast humidity and temperature control. A change in fuel cell load induces a reactant mass flow rate disturbance to this humidification system. If not well regulated, this disturbance creates undesirable condensation and evaporation dynamics, both to the humidification system and the fuel cell stack. Therefore, controllers were devised, tuned, and employed for temperature reference tracking and disturbance rejection. Two heater controller types were explored: on-off (thermostatic) and variable (proportional integral), to examine the ability of the feedback system to achieve the control objectives with minimal hardware and software complexities. The coordination of the heaters and the bypass valve is challenging during fast transients due to the different time scales, the actuator constraints, and the sensor responsiveness.
    keyword(s): Temperature , Control equipment , Humidifiers , Water , Errors , Flow (Dynamics) AND Cycles ,
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      A Controllable Membrane-Type Humidifier for Fuel Cell Applications—Part II: Controller Design, Analysis and Implementation

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    http://yetl.yabesh.ir/yetl1/handle/yetl/146515
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    • Journal of Fuel Cell Science and Technology

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    contributor authorDenise A. McKay
    contributor authorAnna G. Stefanopoulou
    contributor authorJeffrey Cook
    date accessioned2017-05-09T00:44:43Z
    date available2017-05-09T00:44:43Z
    date copyrightFebruary, 2011
    date issued2011
    identifier issn2381-6872
    identifier otherJFCSAU-28946#011004_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/146515
    description abstractA membrane-based gas humidification apparatus was employed to actively manage the amount of water vapor entrained in the reactant gas supplied to a fuel cell stack. The humidification system utilizes a gas bypass and a series of heaters to achieve accurate and fast humidity and temperature control. A change in fuel cell load induces a reactant mass flow rate disturbance to this humidification system. If not well regulated, this disturbance creates undesirable condensation and evaporation dynamics, both to the humidification system and the fuel cell stack. Therefore, controllers were devised, tuned, and employed for temperature reference tracking and disturbance rejection. Two heater controller types were explored: on-off (thermostatic) and variable (proportional integral), to examine the ability of the feedback system to achieve the control objectives with minimal hardware and software complexities. The coordination of the heaters and the bypass valve is challenging during fast transients due to the different time scales, the actuator constraints, and the sensor responsiveness.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleA Controllable Membrane-Type Humidifier for Fuel Cell Applications—Part II: Controller Design, Analysis and Implementation
    typeJournal Paper
    journal volume8
    journal issue1
    journal titleJournal of Fuel Cell Science and Technology
    identifier doi10.1115/1.4001020
    journal fristpage11004
    identifier eissn2381-6910
    keywordsTemperature
    keywordsControl equipment
    keywordsHumidifiers
    keywordsWater
    keywordsErrors
    keywordsFlow (Dynamics) AND Cycles
    treeJournal of Fuel Cell Science and Technology:;2011:;volume( 008 ):;issue: 001
    contenttypeFulltext
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