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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2401.11765 |
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| _version_ | 1866913203254984704 |
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| author | Mishra, Bhrigu Rishi Sundaram, Sreerag Sasihithlu, Karthik |
| author_facet | Mishra, Bhrigu Rishi Sundaram, Sreerag Sasihithlu, Karthik |
| contents | Recent developments in radiative cooling technologies have primarily focused on affordable paint coatings that are easy to fabricate and deploy. Using a systematic approach to obtain optimal parameters, a radiative cooling (RC) paint coating using titanium dioxide (TiO2) and polydimethylsiloxane (PDMS) is designed. The resulting paint exhibits a high solar reflectivity of 88.2 % (more than 94% in visible and NIR) and an emissivity of 92.4 %. Outdoor testing demonstrates a maximum reduction of 7.9 0C in the internal temperature of an RC paint-coated aluminium (Al) box compared to a bare Al box but in contrast to other studies, no sub-ambient cooling have been observed. In this context, a comprehensive analysis explaining the absence of sub-ambient cooling and underscore the importance of a standardized reporting methodology for RC paints has been discussed. Theoretical calculations suggest that the developed RC paint can achieve sub-ambient cooling (1-4 0C) under specific ambient conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_11765 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Design of radiative cooling paint coating and insights into its sub-ambient cooling behaviour Mishra, Bhrigu Rishi Sundaram, Sreerag Sasihithlu, Karthik Applied Physics Optics Recent developments in radiative cooling technologies have primarily focused on affordable paint coatings that are easy to fabricate and deploy. Using a systematic approach to obtain optimal parameters, a radiative cooling (RC) paint coating using titanium dioxide (TiO2) and polydimethylsiloxane (PDMS) is designed. The resulting paint exhibits a high solar reflectivity of 88.2 % (more than 94% in visible and NIR) and an emissivity of 92.4 %. Outdoor testing demonstrates a maximum reduction of 7.9 0C in the internal temperature of an RC paint-coated aluminium (Al) box compared to a bare Al box but in contrast to other studies, no sub-ambient cooling have been observed. In this context, a comprehensive analysis explaining the absence of sub-ambient cooling and underscore the importance of a standardized reporting methodology for RC paints has been discussed. Theoretical calculations suggest that the developed RC paint can achieve sub-ambient cooling (1-4 0C) under specific ambient conditions. |
| title | Design of radiative cooling paint coating and insights into its sub-ambient cooling behaviour |
| topic | Applied Physics Optics |
| url | https://arxiv.org/abs/2401.11765 |