Evaluation of glazing retrofitting solution for the tropics

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Evaluation of glazing retrofitting solution for the tropics
Evaluation of glazing retrofitting solution for the tropics
Other Titles:
Energy & Buildings
Publication Date:
03 June 2020
Wee Shing Koh, Huizhe Liu, Sivanand Somasundaram, Sundar Raj Thangavelu, Alex Chong, Karthik Pillai, Hirosi Kojima, Yusuke Mori, Evaluation of glazing retrofitting solution for the tropics, Energy and Buildings, Volume 223, 2020, 110190, ISSN 0378-7788, https://doi.org/10.1016/j.enbuild.2020.110190.
With the increase in the stock of old buildings in urban cities, there is an imperative demand to retrofit the old buildings to reduce their energy consumption and also maximize the use of natural daylight to enhance the well-being of the occupants in the buildings. For old commercial buildings, one of the solutions to reduce energy consumption is to reduce the heat transfer through the building envelope to the air-conditioned interior spaces. However, there are very limited solutions to alter the building envelope without the involvement of major construction works. The glass is usually an indispensable part of the building envelope for commercial buildings. Many old commercial buildings in Singapore and several other South-East Asian countries near the equator are fitted with monolithic glass as the window facade due to small variation in outdoor air temperature in the region throughout the year. By converting the monolithic glass facade into a double glazing unit, some energy savings will result, but it is unclear if the benefit is substantial. A new retrofitting solution known as the ‘‘ATTOCH Inner Window” or AIW in short, was developed by AGC recently. The retrofitting solution, AIW, basically converts an existing single pane glass facade into a double glazing unit by adding a secondary glass from the interior of the building. With a low-emissivity coated glass as the secondary glass, the effective g-value (solar transmittance) and U-value (thermal transmittance) of the double glazing unit are both reduced. Thus, the aim of this manuscript is to evaluate the performance of AIW when subjected to the tropical climate in selected Southeast Asian cities.
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Funding Info:
Singapore Ministry of National Development and National Research Foundation under L2 NIC Award No.: L2NICCFP1-2013-6 and the Singapore Maritime Institute Grant Project ID: SMI-2016-MA-04
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