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    Design and Analysis of a New Pressure Relief Valve for Oil-Immersed Electrical Equipment

    Source: Journal of Pressure Vessel Technology:;2022:;volume( 145 ):;issue: 002::page 21701-1
    Author:
    Luo, Liang
    ,
    Li, Jinzhong
    ,
    Zhang, Nong
    ,
    Wang, Ke
    ,
    Zhang, Shuqi
    ,
    Liang, Ningchuan
    DOI: 10.1115/1.4056382
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Internal arcing in oil-immersed electrical equipment is inevitable and of great danger. Transient overpressure should be released by protectors quickly and controllably. Currently available pressure relief valves cannot fully protect the electrical equipment due to mismatch between insufficient relief capacity with correspondingly weak valve structure and increasing arcing energy in upgrading electrical systems. Additionally, flaming possibility of ejected high-temperature oil–gas mixture is distinct, and retained oil in an oil tank without any isolation may be ignited by the flame. Unfortunately, resealing of some existing single-outlet valves is out of control due to asymmetrical hydraulic pressure distribution on the valve plate which causes unstable valve plate movement. Therefore, a new pressure relief valve characterized by symmetrical outlets and improved pressure relief capacity was developed. The novel structure and function of the new valve was first introduced, and comprehensive analysis regarding dynamic performances, strength and fluid development during the relief process were conducted. Finally, a prototype was manufactured and tested on a specific arcing test system. The developed valve can well release the overpressure generated by a 6 MJ equivalent arcing fault without any flame during the entire relief process. Furthermore, the valve structure can withstand the pressure load, and valve plate can precisely reseal the oil tank due to optimized fluid pressure distribution. This research provides an optimized pressure relief valve and a design guide for improved pressure relief valve.
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      Design and Analysis of a New Pressure Relief Valve for Oil-Immersed Electrical Equipment

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4292526
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    contributor authorLuo, Liang
    contributor authorLi, Jinzhong
    contributor authorZhang, Nong
    contributor authorWang, Ke
    contributor authorZhang, Shuqi
    contributor authorLiang, Ningchuan
    date accessioned2023-08-16T18:48:33Z
    date available2023-08-16T18:48:33Z
    date copyright12/14/2022 12:00:00 AM
    date issued2022
    identifier issn0094-9930
    identifier otherpvt_145_02_021701.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4292526
    description abstractInternal arcing in oil-immersed electrical equipment is inevitable and of great danger. Transient overpressure should be released by protectors quickly and controllably. Currently available pressure relief valves cannot fully protect the electrical equipment due to mismatch between insufficient relief capacity with correspondingly weak valve structure and increasing arcing energy in upgrading electrical systems. Additionally, flaming possibility of ejected high-temperature oil–gas mixture is distinct, and retained oil in an oil tank without any isolation may be ignited by the flame. Unfortunately, resealing of some existing single-outlet valves is out of control due to asymmetrical hydraulic pressure distribution on the valve plate which causes unstable valve plate movement. Therefore, a new pressure relief valve characterized by symmetrical outlets and improved pressure relief capacity was developed. The novel structure and function of the new valve was first introduced, and comprehensive analysis regarding dynamic performances, strength and fluid development during the relief process were conducted. Finally, a prototype was manufactured and tested on a specific arcing test system. The developed valve can well release the overpressure generated by a 6 MJ equivalent arcing fault without any flame during the entire relief process. Furthermore, the valve structure can withstand the pressure load, and valve plate can precisely reseal the oil tank due to optimized fluid pressure distribution. This research provides an optimized pressure relief valve and a design guide for improved pressure relief valve.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDesign and Analysis of a New Pressure Relief Valve for Oil-Immersed Electrical Equipment
    typeJournal Paper
    journal volume145
    journal issue2
    journal titleJournal of Pressure Vessel Technology
    identifier doi10.1115/1.4056382
    journal fristpage21701-1
    journal lastpage21701-8
    page8
    treeJournal of Pressure Vessel Technology:;2022:;volume( 145 ):;issue: 002
    contenttypeFulltext
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