The Influence of Electrochromic Film on Indoor Environmental Quality

The Influence of Electrochromic Film on Indoor Environmental Quality

This study was conducted at SPINLab. The full-scale experiments were performed using two experimental spaces of identical specifications to investigate the effects of electrochromic film (OG + EC<sub>ON</sub> or OG + EC<sub>OFF</sub>) on indoor environment and air conditionin...

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Bibliographic Details
Main Authors: Kuan-Ting Yeh, Wei-Chieh Hu, Chun-Kuei Chen, Ta-Hui Lin, Feng-Yi Lin, Chung-Chih Cheng, Tzu-Ching Su, Pei-Yu Yu
Format: Article
Language:English
Published: MDPI AG 2025-05-01
Series:Energies
Subjects:
electrochromic film
indoor comfort
electricity consumption
building orientation
Online Access:https://www.mdpi.com/1996-1073/18/10/2499
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Summary:This study was conducted at SPINLab. The full-scale experiments were performed using two experimental spaces of identical specifications to investigate the effects of electrochromic film (OG + EC<sub>ON</sub> or OG + EC<sub>OFF</sub>) on indoor environment and air conditioning electricity consumption in buildings with different orientations (East and West). The electricity-saving effects are more pronounced on the building’s west-facing side than on its east-facing side. For the east-facing side, the average electricity savings for OG + EC<sub>ON</sub> and OG + EC<sub>OFF</sub> were 4.5%, and 5.1%, respectively. For the west-facing side, the average electricity savings increased to 9.2% and 9.4% for OG + EC<sub>ON</sub> and OG + EC<sub>OFF</sub>. The research results on thermal comfort indicate (PMV) that applying electrochromic film (OG + EC<sub>ON</sub> or OG + EC<sub>OFF</sub>) significantly improved indoor thermal comfort compared to using clear glass (OG) alone. The visual comfort analysis results indicate that the opaque (OG + EC<sub>OFF</sub>) and transparent (OG + EC<sub>ON</sub>) states of electrochromic film could reduce daylight glare probability (DGP) values. However, due to the light-scattering properties of the liquid crystal droplets, the OG + EC<sub>OFF</sub> and OG + EC<sub>ON</sub> states of the electrochromic film increased DGP values in 26.5% and 41.5% of the cases, respectively, when sunlight directly entered the interior.
ISSN:1996-1073

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