Evaluation of the Effects of Window Films on the Indoor Environment and Air-Conditioning Electricity Consumption of Buildings
Hsing-Yun Huang,
Wei-Chieh Hu,
Chun-Kuei Chen,
Ta-Hui Lin,
Feng-Yi Lin,
Chung-Chih Cheng,
Tzu-Ching Su,
Pei-Yu Yu
Affiliations
Hsing-Yun Huang
Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
Wei-Chieh Hu
Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 70101, Taiwan
Chun-Kuei Chen
Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 70101, Taiwan
Ta-Hui Lin
Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
Feng-Yi Lin
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, 195, Sec. 4, Chung Hsing Rd., Chutung, Hsinchu 310401, Taiwan
Chung-Chih Cheng
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, 195, Sec. 4, Chung Hsing Rd., Chutung, Hsinchu 310401, Taiwan
Tzu-Ching Su
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, 195, Sec. 4, Chung Hsing Rd., Chutung, Hsinchu 310401, Taiwan
Pei-Yu Yu
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, 195, Sec. 4, Chung Hsing Rd., Chutung, Hsinchu 310401, Taiwan
The objective of this study was to evaluate the effects of window films on indoor environmental conditions and electricity consumption of air conditioning. The research focused on the performance of different window films (HAG, RG), taking into account variations from different building orientations. The findings of this research indicated that building orientation could significantly influence the duration of direct sunlight entering the interior, with the areas closer to the glass being more susceptible to the effects of outdoor temperature and solar radiation. The clear glass with heat-absorbing film (HAG) and reflective film (RG) both reduced the indoor temperature and indoor illuminance while increasing indoor comfort. The RG could accumulate less heat on the glass surface compared with the HAG. The glass temperature of the RG will be lower than the HAG. The electricity-saving ratios of the HAG were 1.4%, 1.9%, 1.4%, and 1.2%, respectively, when facing the east, south, west, and northwest orientations compared with the clear glass (OG). The electricity-saving ratios of the RG were 3%, 4.2%, 4.2%, and 10.3%, respectively.
