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Sustainability 2018, 10(1), 64; https://doi.org/10.3390/su10010064

Solar Heat Gain Reduction of Ventilated Double Skin Windows without a Shading Device

1
Korea Institute of Civil Engineering and Building Technology, 10223 Goyang-si, Korea
2
Kolon Global Corp., 21984 Incheon-si, Korea
*
Author to whom correspondence should be addressed.
Received: 13 November 2017 / Revised: 26 December 2017 / Accepted: 27 December 2017 / Published: 28 December 2017
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Abstract

With global efforts to strengthen various energy-saving policies for buildings to reduce greenhouse gas emissions, in South Korea, new laws and regulations have been in force since May 2015 to install shading devices in public buildings and to include the solar heat gain coefficient (SHGC) reduction performance of shading devices in the evaluation of building performance. By making a ventilated air layer outer glass and inner glass to lower the temperatures of the air layer and glass surface, it is possible to reduce the amount of heat flowing into the building while maintaining the same level of light transmission as plain window systems. This study proposes a double-skin façade window with a 20 mm ventilated air cavity, and assumes that insolation inflow indoors would be reduced through ventilation in the air cavity. The artificial solar lab test results show that the SHGC can be lowered through ventilation by 28% to 52.9%. Additionally, in an outdoor test cell experiment, the results show that the mean temperature was 0.6 K and the peak temperature was 0.9 K lower with ventilation in the air cavity than that without ventilation in the air cavity. View Full-Text
Keywords: building envelope; double façade window; SHGC; artificial solar labs; outdoor chamber test building envelope; double façade window; SHGC; artificial solar labs; outdoor chamber test
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Koo, B.; Lee, K.; An, Y.; Lee, K. Solar Heat Gain Reduction of Ventilated Double Skin Windows without a Shading Device. Sustainability 2018, 10, 64.

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