Issue |
Natl Sci Open
Volume 3, Number 3, 2024
Special Topic: Energy Systems of Low Carbon Buildings
|
|
---|---|---|
Article Number | 20230065 | |
Number of page(s) | 20 | |
Section | Engineering | |
DOI | https://doi.org/10.1360/nso/20230065 | |
Published online | 12 March 2024 |
RESEARCH ARTICLE
Radiative cooling for long-term building energy efficiency: An experimental comparison of seven coatings
1
School of Architecture and Urban Planning, Chongqing University, Chongqing 400045, China
2
Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing 400045, China
* Corresponding author (email: fengchi860602@outlook.com)
Received:
23
October
2023
Revised:
21
February
2024
Accepted:
8
March
2024
Radiative cooling coatings are widely used owing to their excellent cooling performance and energy efficiency. However, there is a lack of comprehensive research on their weather resistance, long-term performance and effects on building load. To fill this research gap, seven coatings were selected for experimental observation and simulation research. The results revealed noticeable differences among different coatings regarding anti-aging properties, cooling performance and building load reduction. Some coatings exhibited yellowing, cracking and peeling after weathering tests, accompanied by a decline in their radiative properties. Long-term tests showed that the cooling performance of all coatings gradually decreased due to natural aging, and the rate of decline was proportional to the weathering of the coatings. Building load simulations revealed the potential effect of coating selection on cooling and heating loads, thereby suggesting that different coatings should be selected based on actual usage scenarios in different climatic zones.
Key words: radiative cooling coating / weather resistance / long-term cooling performance / building load
© The Author(s) 2024. Published by Science Press and EDP Sciences.
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