High-Reflectance Low-Emissivity Multilayer Wallpaper for Envelope Cooling and Energy Saving of Tropical Buildings
- 1State Key Laboratory of Advanced Waterproof Materials, School of Materials Science and Engineering, Peking University, Beijing 100871, China
- 2State Key Laboratory of Advanced Waterproof Materials, Beijing Oriental Yuhong Waterproof Technology Co., Ltd., Beijing 101300, China
Abstract
Buildings account for a large share of global energy use, and tropical cooling loads are intensified by solar radiation and humidity. This study characterizes a tape-applied four-layer wallpaper (PET grid fabric/PVC/commercial aluminized film/PE) on one model house per finish in Hainan, China. Laboratory solar reflectance is approximately 0.77 and comparative 8–13 µm emissivity is 0.32–0.38, indicating a solar reflector plus radiant barrier rather than a high-emittance sky-window cooler. In May 2022, EE-1 reduced exterior-roof and indoor-air temperatures by up to 8 °C and 4 °C relative to a contemporaneous uncoated house. Treatments were not randomized, and no pre-treatment baseline exists, so the contrasts are descriptive. Electricity use was 10% and 22% lower at 23 and 20 °C; the 2% contrast at 26 °C is not primary evidence. After 3–4 months, EE-1 delaminated. Retrieved EE-1 retained solar reflectance of 0.769, while transverse elongation fell to 58% of the unexposed value. EE-3/EE-4 improved short-term appearance only. Cooling and multi-month durability were not demonstrated for one formulation.
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BibTeX
@article{liu2026highreflectance,
title = {{High-Reflectance Low-Emissivity Multilayer Wallpaper for Envelope Cooling and Energy Saving of Tropical Buildings}},
author = {Jinjing Liu and Yangyang Ge and Zhenghui Shen and Shenghui Han and Weixin Luo and Ruqiang Zou},
journal = {Nanomaterials},
year = {2026},
month = oct,
doi = {10.3390/nano16201325},
url = {https://www.mdpi.com/2079-4991/16/20/1325},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - High-Reflectance Low-Emissivity Multilayer Wallpaper for Envelope Cooling and Energy Saving of Tropical Buildings
AU - Jinjing Liu
AU - Yangyang Ge
AU - Zhenghui Shen
AU - Shenghui Han
AU - Weixin Luo
AU - Ruqiang Zou
PY - 2026
DA - 2026/10/01
JO - Nanomaterials
DO - 10.3390/nano16201325
UR - https://www.mdpi.com/2079-4991/16/20/1325
AB - Buildings account for a large share of global energy use, and tropical cooling loads are intensified by solar radiation and humidity. This study characterizes a tape-applied four-layer wallpaper (PET grid fabric/PVC/commercial aluminized film/PE) on one model house per finish in Hainan, China. Laboratory solar reflectance is approximately 0.77 and comparative 8–13 µm emissivity is 0.32–0.38, indicating a solar reflector plus radiant barrier rather than a high-emittance sky-window cooler. In May 2022, EE-1 reduced exterior-roof and indoor-air temperatures by up to 8 °C and 4 °C relative to a contemporaneous uncoated house. Treatments were not randomized, and no pre-treatment baseline exists, so the contrasts are descriptive. Electricity use was 10% and 22% lower at 23 and 20 °C; the 2% contrast at 26 °C is not primary evidence. After 3–4 months, EE-1 delaminated. Retrieved EE-1 retained solar reflectance of 0.769, while transverse elongation fell to 58% of the unexposed value. EE-3/EE-4 improved short-term appearance only. Cooling and multi-month durability were not demonstrated for one formulation.
SN - 2079-4991
ER -