Experimental measurement of hermetic edge seal's thermal conductivity for the thermal transmittance prediction of triple vacuum glazing
Memon, S (2017). Experimental measurement of hermetic edge seal's thermal conductivity for the thermal transmittance prediction of triple vacuum glazing. Case Studies in Thermal Engineering. 10, pp. 169-178.
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 W m−1 K−1 and 7.47 W m−1 K−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 300 mm × 300 mm triple vacuum glazing to be 0.33 W m−2 K−1 and 1.05 W m−2 K−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 W m−2 K−1 due to the temperature gradient loss spread to 54 mm and 84 mm on the cold and warm side respectively.
|Keywords||Thermal conductivity; Transient plane source; Triple vacuum glazing; Thermal performance|
|Journal||Case Studies in Thermal Engineering|
|Journal citation||10, pp. 169-178|
|Digital Object Identifier (DOI)||doi:10.1016/j.csite.2017.06.002|
|15 Jun 2017|
|Publication process dates|
|Deposited||09 Nov 2017|
|Accepted||14 Jun 2017|
|Accepted author manuscript|
CC BY-NC-ND 4.0
CC BY-NC-ND 4.0
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