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    Dynamic Heat Transfer Characteristic of Heat Exchanger for Sensible Heat Recovery of Raw Coke Oven Gas

    Source: Journal of Thermal Science and Engineering Applications:;2022:;volume( 014 ):;issue: 012::page 121009
    Author:
    Wenping, Peng;Zhiping, Jin;Gailin, Lu;Tao, Bai;Lixing, Zheng;Congxiu, Guo
    DOI: 10.1115/1.4055260
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A simplified hybrid-dimensional unsteady heat transfer model for the ascension-pipe heat exchanger with a helically coiled tube embedded in the jacket and supported by high conductivity particles is established based on the non-thermal equilibrium theory of porous medium. This idea can also be used in the design of other heat exchange devices involving the helically coiled tube. According to calculations, the wall temperature of the ascension-pipe heat exchanger periodically varies due to the periodic variations of flow rate and temperature of raw coke oven gas. A great thermal stress will be produced due to this reason. The coal tar precipitation mainly occurs in the late stage of the coking period due to the continuous cooling of molten salt. Based on the detailed analysis, thermal conductivity of packing layer, heat capacity per unit volume of packing layer, volume of packing layer, flow rate of molten salt and inlet temperature of molten salt are important factors that should be scientifically designed in the design of this type of heat exchanger to reduce thermal stress and coal tar precipitation. Cutting off molten salt in the late stage of the coking period is an effective measure to control the wall temperature of the ascension pipe above the dew point of coal tar vapor.
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      Dynamic Heat Transfer Characteristic of Heat Exchanger for Sensible Heat Recovery of Raw Coke Oven Gas

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4288437
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    • Journal of Thermal Science and Engineering Applications

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    contributor authorWenping, Peng;Zhiping, Jin;Gailin, Lu;Tao, Bai;Lixing, Zheng;Congxiu, Guo
    date accessioned2022-12-27T23:21:00Z
    date available2022-12-27T23:21:00Z
    date copyright9/5/2022 12:00:00 AM
    date issued2022
    identifier issn1948-5085
    identifier othertsea_14_12_121009.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4288437
    description abstractA simplified hybrid-dimensional unsteady heat transfer model for the ascension-pipe heat exchanger with a helically coiled tube embedded in the jacket and supported by high conductivity particles is established based on the non-thermal equilibrium theory of porous medium. This idea can also be used in the design of other heat exchange devices involving the helically coiled tube. According to calculations, the wall temperature of the ascension-pipe heat exchanger periodically varies due to the periodic variations of flow rate and temperature of raw coke oven gas. A great thermal stress will be produced due to this reason. The coal tar precipitation mainly occurs in the late stage of the coking period due to the continuous cooling of molten salt. Based on the detailed analysis, thermal conductivity of packing layer, heat capacity per unit volume of packing layer, volume of packing layer, flow rate of molten salt and inlet temperature of molten salt are important factors that should be scientifically designed in the design of this type of heat exchanger to reduce thermal stress and coal tar precipitation. Cutting off molten salt in the late stage of the coking period is an effective measure to control the wall temperature of the ascension pipe above the dew point of coal tar vapor.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDynamic Heat Transfer Characteristic of Heat Exchanger for Sensible Heat Recovery of Raw Coke Oven Gas
    typeJournal Paper
    journal volume14
    journal issue12
    journal titleJournal of Thermal Science and Engineering Applications
    identifier doi10.1115/1.4055260
    journal fristpage121009
    journal lastpage121009_11
    page11
    treeJournal of Thermal Science and Engineering Applications:;2022:;volume( 014 ):;issue: 012
    contenttypeFulltext
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