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Experimental investigations into thermal transport phenomena in vacuum insulation panels (VIPs) using fumed silica cores.

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Title: Experimental investigations into thermal transport phenomena in vacuum insulation panels (VIPs) using fumed silica cores.
Authors: Singh, H.1 harjit.singh@brunel.ac.uk, Geisler, M.2, Menzel, F.2
Source: Energy & Buildings. Nov2015, Vol. 107, p76-83. 8p.
Subjects: Vacuum insulation, Silica fume, Core materials, Silicon carbide, Carbon-black, Thermal conductivity, Pore size distribution
Abstract: This paper reports the experimental and theoretical evaluation of various heat exchange phenomena that occur in a vacuum insulation panel (VIP). Fumed silica and a range of IR-opacifiers were mixed in different proportions to identify the best composition that yields minimum thermal conductivity value at ambient and evacuated conditions. Three variants of carbon black (CB) and one each of silicon carbide (SiC) and titania (TiO 2 ) were employed as opacifiers. Of all tested, CB was found to be the best opacifier based on the detailed experimental FTIR investigations performed whereby specific extinction was measured for each composition. To demonstrate the performance of the optimised samples of core materials developed four VIPs were manufactured which achieved a significantly low overall VIP thermal conductivity of <4 mW m −1 K −1 ( R -value > 36.03 ft 2 ̊F h/BTU in.) measured using guarded hot plate apparatus. With these thermal conductivity values the samples perform much better than most state of the art commercially offered VIPs. [ABSTRACT FROM AUTHOR]
Copyright of Energy & Buildings is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 110100057
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Experimental investigations into thermal transport phenomena in vacuum insulation panels (VIPs) using fumed silica cores.
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Energy+%26+Buildings%22&quot;&gt;Energy &amp; Buildings&lt;/searchLink&gt;. Nov2015, Vol. 107, p76-83. 8p.
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  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Vacuum+insulation%22&quot;&gt;Vacuum insulation&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Silica+fume%22&quot;&gt;Silica fume&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Core+materials%22&quot;&gt;Core materials&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Silicon+carbide%22&quot;&gt;Silicon carbide&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Carbon-black%22&quot;&gt;Carbon-black&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Thermal+conductivity%22&quot;&gt;Thermal conductivity&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Pore+size+distribution%22&quot;&gt;Pore size distribution&lt;/searchLink&gt;
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  Data: This paper reports the experimental and theoretical evaluation of various heat exchange phenomena that occur in a vacuum insulation panel (VIP). Fumed silica and a range of IR-opacifiers were mixed in different proportions to identify the best composition that yields minimum thermal conductivity value at ambient and evacuated conditions. Three variants of carbon black (CB) and one each of silicon carbide (SiC) and titania (TiO 2 ) were employed as opacifiers. Of all tested, CB was found to be the best opacifier based on the detailed experimental FTIR investigations performed whereby specific extinction was measured for each composition. To demonstrate the performance of the optimised samples of core materials developed four VIPs were manufactured which achieved a significantly low overall VIP thermal conductivity of &lt;4 mW m −1 K −1 ( R -value &gt; 36.03 ft 2 ̊F h/BTU in.) measured using guarded hot plate apparatus. With these thermal conductivity values the samples perform much better than most state of the art commercially offered VIPs. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Energy &amp; Buildings is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.enbuild.2015.08.004
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 76
    Subjects:
      – SubjectFull: Vacuum insulation
        Type: general
      – SubjectFull: Silica fume
        Type: general
      – SubjectFull: Core materials
        Type: general
      – SubjectFull: Silicon carbide
        Type: general
      – SubjectFull: Carbon-black
        Type: general
      – SubjectFull: Thermal conductivity
        Type: general
      – SubjectFull: Pore size distribution
        Type: general
    Titles:
      – TitleFull: Experimental investigations into thermal transport phenomena in vacuum insulation panels (VIPs) using fumed silica cores.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Singh, H.
      – PersonEntity:
          Name:
            NameFull: Geisler, M.
      – PersonEntity:
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            NameFull: Menzel, F.
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          Dates:
            – D: 15
              M: 11
              Text: Nov2015
              Type: published
              Y: 2015
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              Value: 03787788
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              Value: 107
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            – TitleFull: Energy & Buildings
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