2024

Vol.31 No.3

Current Issue Archives
Search
Advanced Search
Editorial Office

Review

  • Journal of the Microelectronics and Packaging Society
  • Volume 31(3); 2024
  • Article

Review

Journal of the Microelectronics and Packaging Society 2024;31(3):67-71. Published online: Oct, 30, 2024

PDF Full Text XML

DOI : doi.org/10.6117/kmeps.2024.31.3.067

Evaluation Study of Performance for Solar Energy Blocking of Smart Windows based on Phase Retardation Film

  • Il-Gu Kim, Ho-Chang Yang, Young-Min Park, Yo-Han Suh, Seung Hyun Lee, and Young Kyu Hong†
    Smart Electronics Research Center, Korea Electronics Technology Institute 111, Ballyong-ro, Deokjin-gu, Jeonju-si, Jeollabuk-do 54853, Korea
Corresponding author E-mail: ykhong@keti.re.kr
Abstract

A smart window based on a retarder can transmit or block polarized lights by overlapping two smart windows. In the study, tests were conducted to evaluate the performance of blocking solar heat using smart windows with a size of 300×300 ㎟. Solar heat gain coefficient (SHGC) values were derived through simulation using transmission and reflectance data of the smart windows. As a result of the simulation, it showed that SGHC is effective in blocking solar heat by obtaining values of 0.722 and 0.615 in transmission and blocking mode of smart windows, respectively. The test boxes were fabricated in order to verify the effect of suppressing temperature rise when applying smart windows, the inside temperature in test boxes, which are installed bare glass (reference) and two smart windows with transmission and blocking mode, were measured at 10 minutes-interval for 7 days. As of 1 p.m., the inside temperature of the test boxes with the smart windows applied showed lower temperature compared to the reference. In particular, on the day when the temperature of reference box was the highest at 66.1℃, the temperature of the test box with the smart window applied showed 61.0℃, which was lowered by 5.1℃.

Keywords Smart window, Phase retardation, Retarder, Solar heat, Transmittance-variable

REFERENCES
  • S. C. Sekhar, K. L. C. Toon, On the study of energy performance and life cycle cost of smart window, Energ. Buildings, 28 (1998)
  • C. M. Lampert, Smart switchable glazing for solar energy and daylight control, Sol. Energy Mater. Sol. Cells, 52 (1998)
  • S. K. Deb, , Photovoltaic-integrated electrochromic device for smart-window applications, (2000)
  • R. C. G. M. Loonen, M. Trčka, D. Cóstola, J. L. M. Hensen, Climate adaptive building shells: State-of-the-art and future challenges, Renew. Sust. Energ. Rev., 25 (2013)
  • J. Ebisawa, E. Ando, Solar control coating on glass, Curr. Opin. Solid State Mater. Sci., 3 (1998)
  • R. Baetens, B. P. Jelle, A. Gustavsen, Properties, requirements and possibilities of smart windows for dynamic day-light and solar energy control in buildings: A state-of-the-art review, Sol. Energy Mater. Sol. Cells., 94 (2010)
  • K. H. Kim, Smart window, KISTI Market Report, 5 (2015)
  • S. Kumar, H. Hong, W. Choi, I. Akhtar, M. A. Rehman, Y. Seo, Acrylate-assisted fractal nanostructured polymer dispersed liquid crystal droplet based vibrant colored smart-windows, RSC Adv., 9 (2019)
  • A. Ghosh, B. Norton, Durability of switching behaviour after outdoor exposure for a suspended particle device switchable glazing, Sol. Energy Mater. Sol. Cells, 163 (2017)
  • X. Li, K. Perera, J. He, A. Gumyusenge, J. Mei, Solution-processable electrochromic materials and devices: road-blocks and strategies towards large-scale applications, J. Mater. Chem. C, 7 (2019)
  • S. -M. Guo, X. Liang, C. -H. Zhang, M. Chen, C. Shen, L. -Y. Zhang, X. Yuan, B. -F. He, H. Yang, Preparation of a Thermally Light-Transmittance-Controllable Film from a Coexistent System of Polymer-Dispersed and Polymer-Stabilized Liquid Crystals, ACS Appl. Mater. Interfaces, 9 (2017)
  • I. G. Kim, H. C. Yang, Y. M. Park, Y. K. Hong, S. H. Lee, Fabrication of Visible Light Transmittance-variable Smart Windows Using Phase Retardation Films, J. Microelectron. Packag. Soc., 29 (2022)