Improvement in Energy Performance of Building Envelope Incorporating Electrochromic Windows (ECWs)

Bo Rang Park, Jongin Hong, Eun Ji Choi, Young Jae Choi, Choonyeob Lee and Jin Woo Moon
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Bo Rang Park: School of Architecture and Building Science, Chung-Ang University, Seoul 06974, Korea
Jongin Hong: School of Chemistry, Chung-Ang University, Seoul 06974, Korea
Eun Ji Choi: School of Architecture and Building Science, Chung-Ang University, Seoul 06974, Korea
Young Jae Choi: School of Architecture and Building Science, Chung-Ang University, Seoul 06974, Korea
Choonyeob Lee: Orion Co., Ltd, Gumi-si 39370, Korea
Jin Woo Moon: School of Architecture and Building Science, Chung-Ang University, Seoul 06974, Korea

Energies, 2019, vol. 12, issue 6, 1-18

Abstract: The present study sets out to review the thermal and optical properties of electrochromic windows (ECWs) through an analysis of the improvement in the energy performance of a building resulting from their application. The performance analysis was based on the change in the room temperature according to the solar transmittance and the orientation of the ECWs, the energy consumptions of the building’s heating/cooling systems, and that of the building’s lighting according to the visible light transmittance (VLT). To achieve this, the Quick Energy Simulation Tool (eQUEST), a building energy interpretation program, was used. The solar heat gain coefficient (SHGC) of the ECWs was found to be significantly reduced. This had the effect of lowering the room temperature in summer, such that the effect on the summer cooling energy consumption was also remarkable. However, with a reduction in the VLT, the lighting energy consumption increased. The net result of the changes in the heating/cooling and lighting energy consumptions was a reduction of about 11,207 kWh/yr (8.89%). The ECWs were found to realize a greater reduction in a building’s energy consumption than was possible with windows glazed with low-E coated glass.

Keywords: electrochromic windows; building energy; smart windows (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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