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    The Determination of Thermal Diffusivities of Thermal Energy Storage Materials, Part I: Solids up to Melting Point

    Source: Journal of Engineering for Gas Turbines and Power:;1967:;volume( 089 ):;issue: 003::page 407
    Author:
    H. Chang
    ,
    M. Altman
    ,
    R. Sharma
    DOI: 10.1115/1.3616705
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This paper describes a method for the determination of thermal diffusivities which has been developed specifically for substances which are poor conductors and which have high melting points. Materials which are useful for thermal energy storage fall into this category. The method has several unique features. The basic principle involved consists of raising the surface temperature of a solid specimen at a uniform rate. After the initial transients have died out, the diffusivity can be determined from temperature measurements alone. The advantages of the method are: (a) Heat flux measurements are not needed; (b) materials can be tested right up to the melting point, since the specimens can be encapsulated and softening can be tolerated; (c) large temperature ranges can be tested quickly; (d) precision and accuracy are good. The method has been extended to the liquid range, and results will be published as Part II. Results of measurements are reported for alumina and lithium fluoride. The results for alumina (Lucalox) check results reported previously. The results on LiF differ from published results. Data on other substances are still being produced and results will be published at a later date.
    keyword(s): Solids , Melting point , Thermal energy storage , Temperature , Measurement , Temperature measurement , Accuracy and precision , Lithium AND Heat flux ,
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      The Determination of Thermal Diffusivities of Thermal Energy Storage Materials, Part I: Solids up to Melting Point

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    http://yetl.yabesh.ir/yetl1/handle/yetl/118434
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    contributor authorH. Chang
    contributor authorM. Altman
    contributor authorR. Sharma
    date accessioned2017-05-08T23:53:00Z
    date available2017-05-08T23:53:00Z
    date copyrightJuly, 1967
    date issued1967
    identifier issn1528-8919
    identifier otherJETPEZ-26661#407_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/118434
    description abstractThis paper describes a method for the determination of thermal diffusivities which has been developed specifically for substances which are poor conductors and which have high melting points. Materials which are useful for thermal energy storage fall into this category. The method has several unique features. The basic principle involved consists of raising the surface temperature of a solid specimen at a uniform rate. After the initial transients have died out, the diffusivity can be determined from temperature measurements alone. The advantages of the method are: (a) Heat flux measurements are not needed; (b) materials can be tested right up to the melting point, since the specimens can be encapsulated and softening can be tolerated; (c) large temperature ranges can be tested quickly; (d) precision and accuracy are good. The method has been extended to the liquid range, and results will be published as Part II. Results of measurements are reported for alumina and lithium fluoride. The results for alumina (Lucalox) check results reported previously. The results on LiF differ from published results. Data on other substances are still being produced and results will be published at a later date.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThe Determination of Thermal Diffusivities of Thermal Energy Storage Materials, Part I: Solids up to Melting Point
    typeJournal Paper
    journal volume89
    journal issue3
    journal titleJournal of Engineering for Gas Turbines and Power
    identifier doi10.1115/1.3616705
    journal fristpage407
    journal lastpage414
    identifier eissn0742-4795
    keywordsSolids
    keywordsMelting point
    keywordsThermal energy storage
    keywordsTemperature
    keywordsMeasurement
    keywordsTemperature measurement
    keywordsAccuracy and precision
    keywordsLithium AND Heat flux
    treeJournal of Engineering for Gas Turbines and Power:;1967:;volume( 089 ):;issue: 003
    contenttypeFulltext
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