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2019 Vol.10, Issue 4 Preview Page

General Article

Evaluation of building energy and daylight performance according to applying electrochromic and pdcl (polymer dispersed liquid crystal) to office building in South Korea
Myunghwan Oh1
,
Jaesung Park2*
1Researcher, Energy Efficiency Building Materials Center, Energy Division, Korea Conformity Laboratories(KCL), Seosan, South Korea
2Researcher, Energy Efficiency Building Materials Center, Energy Division, Korea Conformity Laboratories(KCL), Ochang, South Korea
* Corresponding Author
31 December 2019. pp. 227-240
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Abstract

In this study, building energy and daylight performance were analyzed when electrochromic and polymer dispersed liquid crystal (PDLC) double glazings, which are a type of solar control glass, were applied to an office building. An analysis model of the office building was constructed based on the spectral data of the two types of solar control glass. The building energy and daylight performance were analyzed in the colored state for the summer season and in the clear state for the winter season. In the case of the building energy, the electrochromic double glazing could save 31.7% of the energy and the PDLC double glazing 25.1% compared to conventional low-e double glazing. As for the discomfort glare reduction performance in the daylight, the PDLC double glazing exhibited a higher discomfort glare reduction effect owing to its narrower visible-light transmittance range and lower transmittance in the clear state compared to the electrochromic double glazing. When the time ratio of comfort daylight illuminance, which corresponds to the daylight performance, was analyzed, the electrochromic double glazing (54.4%) exhibited a 155.2% increase compared to the low-e double glazing (35.6%). The PDLC double glazing (52.5%) showed a 149.1% increase, indicating that both glazings improved the time ratio of appropriate indoor illuminance. The performance evaluation results showed that the two types of solar control glass had benefits and drawbacks, and that both were effective in improving the building energy and daylight performance.

Keywords
electrochromic
polymer dispersed liquid crystal
building energy
daylight performance
energyplus
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Information
  • Publisher :Sustainable Building Research Center (ERC) Innovative Durable Building and Infrastructure Research Center
  • Publisher(Ko) :건설구조물 내구성혁신 연구센터
  • Journal Title :International Journal of Sustainable Building Technology and Urban Development
  • Volume : 10
  • No :4
  • Pages :227-240
  • Received Date : 2019-12-09
  • Accepted Date : 2019-12-31
  • DOI :https://doi.org/10.22712/susb.20190024
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