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    Thermal Stratification in a Pool With Submerged Heater Under Low Frequency Excitation

    Source: Journal of Nuclear Engineering and Radiation Science:;2022:;volume( 008 ):;issue: 003::page 31405-1
    Author:
    Chauhan
    ,
    S. P.;Chandraker
    ,
    D. K.;Kumar
    ,
    Naveen
    DOI: 10.1115/1.4053221
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Thermal performance of passive residual heat removal systems and solar heaters is affected by thermal stratification in the pool. There are hardly any studies reported in the literature on the role of seismic excitations on thermal stratification in water pools. This work focuses on the experimental investigation of thermal stratification in a pool under the seismic condition with the horizontally mounted heater simulating the heat exchanger. Effects of heater submergence depth, frequency of excitation, and amplitude of displacement on the thermal stratification have been investigated experimentally. It was observed that the heater submergence depth has significant effect on thermal stratification in the pool. When the water pool is subjected to an external excitation, the pool water separates into two zones; convective and impulsive. If the heater is in the impulsive zone, excitation effects are not found. If heater is close to convective zone, significant effects on thermal stratification are observed. However, it is observed that only first mode of excitation with large amplitude helps to achieve complete thermal mixing. Higher modes of excitation have the minimal effect on thermal stratification mitigation. Nondimensional stratification number has been evaluated to explain the mitigation of thermal stratification with seismic excitation.
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      Thermal Stratification in a Pool With Submerged Heater Under Low Frequency Excitation

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4287320
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    • Journal of Nuclear Engineering and Radiation Science

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    contributor authorChauhan
    contributor authorS. P.;Chandraker
    contributor authorD. K.;Kumar
    contributor authorNaveen
    date accessioned2022-08-18T13:02:31Z
    date available2022-08-18T13:02:31Z
    date copyright5/26/2022 12:00:00 AM
    date issued2022
    identifier issn2332-8983
    identifier otherners_008_03_031405.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4287320
    description abstractThermal performance of passive residual heat removal systems and solar heaters is affected by thermal stratification in the pool. There are hardly any studies reported in the literature on the role of seismic excitations on thermal stratification in water pools. This work focuses on the experimental investigation of thermal stratification in a pool under the seismic condition with the horizontally mounted heater simulating the heat exchanger. Effects of heater submergence depth, frequency of excitation, and amplitude of displacement on the thermal stratification have been investigated experimentally. It was observed that the heater submergence depth has significant effect on thermal stratification in the pool. When the water pool is subjected to an external excitation, the pool water separates into two zones; convective and impulsive. If the heater is in the impulsive zone, excitation effects are not found. If heater is close to convective zone, significant effects on thermal stratification are observed. However, it is observed that only first mode of excitation with large amplitude helps to achieve complete thermal mixing. Higher modes of excitation have the minimal effect on thermal stratification mitigation. Nondimensional stratification number has been evaluated to explain the mitigation of thermal stratification with seismic excitation.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThermal Stratification in a Pool With Submerged Heater Under Low Frequency Excitation
    typeJournal Paper
    journal volume8
    journal issue3
    journal titleJournal of Nuclear Engineering and Radiation Science
    identifier doi10.1115/1.4053221
    journal fristpage31405-1
    journal lastpage31405-10
    page10
    treeJournal of Nuclear Engineering and Radiation Science:;2022:;volume( 008 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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