Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Energy Performance Evaluation of Electrochromic Windows through Sensitivity Analysis by Control Variables in Residential Buildings

Electrochromic window 제어변수별 민감도 분석을 통한 주거건물에서의 에너지 절감 효과 분석

  • Received : 2021.09.23
  • Accepted : 2021.11.25
  • Published : 2021.12.30
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Abstract

The purpose of this study was to analyze the energy saving performance of Electrochromic window (ECW) by various control variables through sensitivity analysis. To this end, control variables were established as daylight illuminance, solar radiation and indoor air temperature, and then energy performance of ECW applied to residential buildings were evaluated using building energy simualtion tool, EnergyPlus (ver. 9.2.0). In addition, regional trends of Cheorwon (Jungbu1), Seoul (Jungbu2), Busan (Nambu), and Jeju (Jeju), which have different climate condition, were compared. As a result, among the all control variables, the best reduction rate in the sum of cooling and lighting energy consumption was found to be daylight illuminance, which was the same in all regions. In addition, the energy saving effect was in the order of Cheorwon (9.1% to 12.3%) > Jeju (7.1% to 9.5% ) > Seoul (6.1% to 8.7%) > Busan (5.8% to 8.2%). In the case of solar radiation, the lower the interior illuminance, the better the effect, but the best setpoint for tinting were different by region, so it was judged that prior consideration about solar radiation setpoint for tinting is needed when conducting related research in the future. In the case of indoor temperature, the higher the interior illuminance, the greater the energy performance, but the energy consumption saving effect was not significant.

Keywords

Acknowledgement

이 연구는 2021년도 국토교통부 AI기반 스마트하우징기술개발사업의 연구비 지원(21SHTD-B157018-02)에 의한 결과의 일부임.

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