Experimental measurement and numerical simulation of the thermal performance of a double glazing system with an interstitial Venetian blind

Sun, Yanyi and Wu, Yupeng and Wilson, Robin and Lu, Sixu (2016) Experimental measurement and numerical simulation of the thermal performance of a double glazing system with an interstitial Venetian blind. Building and Environment, 103 . pp. 111-122. ISSN 1873-684X

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Abstract

Venetian blinds, which were originally designed to provide sun shading and privacy, also have the potential to reduce heat transfer caused by internal and external temperature difference when integrated within the cavity between the two panes of a double glazing unit. In this paper, the thermal performance of a glazing system with and without a Venetian blind with various slat orientation angles under different temperature conditions is investigated through both experiment (undertaken in a large climate chamber) and numerical simulation (obtained via Computational Fluid Dynamic modelling). The thermal resistance of a Venetian blind glazing system varies with the change of slat inclination angle, and it also highly depends on the mean temperature of the glazing and the temperature difference between the indoor and outdoor environment. Inclusion of a Venetian blind modifies both the absolute and relative strengths of convection and radiation. Vertically oriented slats showed the most significant contribution to increasing radiative thermal resistance, which led to the best overall thermal performance. The system achieved up to 28% improvement of U-value when compared with a glazing unit without a Venetian blind. Empirical correlations generated based on simulations could be used for future building energy simulation.

Item Type: Article
Keywords: Venetian blind; Climatic chamber; Computational fluid dynamics; Thermal performance; Convection; Radiation
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Architecture and Built Environment
Identification Number: 10.1016/j.buildenv.2016.03.028
Depositing User: Eprints, Support
Date Deposited: 10 Feb 2017 13:47
Last Modified: 14 Apr 2017 03:59
URI: http://eprints.nottingham.ac.uk/id/eprint/40530

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