Evacuated glazing with tempered glass

Fang, Yueping and Arya, Farid (2019) Evacuated glazing with tempered glass. Solar Energy, 183. pp. 240-247. ISSN 0038092X

[img]
Preview
Text
17892_Ayra_F.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (5MB) | Preview

Abstract

The application of tempered glass has made it possible to significantly reduce the support pillar number within evacuated glazing (EG) since tempered glass (T-glass) is four to ten times mechanically stronger than annealed glass (A-glass). The thermal transmittance (U-value) of 0.4 m by 0.4 m double evacuated glazing (DEG) with 4 mm thick T-glass and A-glass panes with emittance of 0.03 were determined to be 0.3 Wm−2K−1 and 0.57 Wm−2K−1, respectively (47.4% improvement) using previously experimentally validated finite volume model. The thermal transmittance (U-value) of 0.4 m by 0.4 m triple evacuated glazing (TEG) with 4 mm thick T-glass and A-glass panes with emittance of 0.03 were determined to be 0.11 Wm−2K−1 and 0.28 Wm−2K−1, respectively (60.7% improvement). The improvement in the U-value of EG with T-glass is due to a reduction in support pillar number, leading to reduction in heat conduction through pillar array. The impact of tempered glass on the thermal transmittance for TEG is greater than that of DEG since radiative heat transfer in TEG is much lower than that in DEG, thus the reduction in heat conduction resulted from the reduction of support pillar number in TEG is much larger than that in DEG

Item Type: Article
Keywords: Evacuated glazing, Annealed glass (A-glass), Tempered glass (T-glass), Thermal performance, Support pillars
Depositing User: RED Unit Admin
Date Deposited: 12 Nov 2019 11:44
Last Modified: 22 Sep 2020 06:31
URI: http://bucks.repository.guildhe.ac.uk/id/eprint/17892

Actions (login required)

Edit Item Edit Item