Experimental measurement of hermetic edge seal's thermal conductivity for the thermal transmittance prediction of triple vacuum glazing

Saim Memon

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Thermal conductivity of hermetic edge-sealing materials plays an important part in the thermal transmittance (U-value) of the triple vacuum glazing. Thermal conductivity of Cerasolzer CS186 alloy and J-B Weld epoxy-steel resin were measured and validated with the mild-steel and indium using transient plane source method with a sensor element of double spiral and resistance thermometer in a hot disk thermal constants analyser TPS2500s are reported. The thermal conductivity data of Cerasolzer CS186 alloy and J-B Weld epoxy steel resin were measured to be 46.49 Wm-1K-1 and 7.47 Wm-1K-1, with the deviations (using analytical method) of ±4% and ±7% respectively. These values were utilised to predict the thermal transmittance value of triple vacuum glazing using 3D finite element model. The simulated results show the centre-of-glass and total U-value of 300mmx300mm triple vacuum glazing to be 0.33Wm-2K-1 and 1.05 Wm-2K-1, respectively. The influence of such a wide edge seal on the temperature loss spreading from the edge to the central glazing area is analysed, in which the predictions show wider edge seal has affected the centre-of-glass U-value to 0.043 Wm-2K-1 due to the temperature gradient loss spread to 54 mm and 84 mm on the cold and warm side respectively.
Original languageEnglish
Pages (from-to)169-178
Number of pages10
JournalCase Studies in Thermal Engineering
DOIs
Publication statusPublished - 1 Sept 2017
Externally publishedYes

Keywords

  • Thermal conductivity
  • Thermal performance
  • Triple vacuum glazing
  • Transient plane source

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