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

Bokyoung Koo, Keonho Lee, Youngsub An and Kyudong Lee
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Bokyoung Koo: Korea Institute of Civil Engineering and Building Technology, 10223 Goyang-si, Korea
Keonho Lee: Korea Institute of Civil Engineering and Building Technology, 10223 Goyang-si, Korea
Youngsub An: Kolon Global Corp., 21984 Incheon-si, Korea
Kyudong Lee: Kolon Global Corp., 21984 Incheon-si, Korea

Sustainability, 2017, vol. 10, issue 1, 1-18

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.

Keywords: building envelope; double façade window; SHGC; artificial solar labs; outdoor chamber test (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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