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A structural polymer for highly efficient all-day passive radiative cooling

Author

Listed:
  • Tong Wang

    (Fudan University)

  • Yi Wu

    (Fudan University)

  • Lan Shi

    (Fudan University)

  • Xinhua Hu

    (Fudan University)

  • Min Chen

    (Fudan University)

  • Limin Wu

    (Fudan University)

Abstract

All-day passive radiative cooling has recently attracted tremendous interest by reflecting sunlight and radiating heat to the ultracold outer space. While some progress has been made, it still remains big challenge in fabricating highly efficient and low-cost radiative coolers for all-day and all-climates. Herein, we report a hierarchically structured polymethyl methacrylate (PMMA) film with a micropore array combined with random nanopores for highly efficient day- and nighttime passive radiative cooling. This hierarchically porous array PMMA film exhibits sufficiently high solar reflectance (0.95) and superior longwave infrared thermal emittance (0.98) and realizes subambient cooling of ~8.2 °C during the night and ~6.0 °C to ~8.9 °C during midday with an average cooling power of ~85 W/m2 under solar intensity of ~900 W/m2, and promisingly ~5.5 °C even under solar intensity of ~930 W/m2 and relative humidity of ~64% in hot and moist climate. The micropores and nanopores in the polymer film play crucial roles in enhancing the solar reflectance and thermal emittance.

Suggested Citation

  • Tong Wang & Yi Wu & Lan Shi & Xinhua Hu & Min Chen & Limin Wu, 2021. "A structural polymer for highly efficient all-day passive radiative cooling," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20646-7
    DOI: 10.1038/s41467-020-20646-7
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    1. Yang, Zhuo & Zhang, Hongqiang & Zhang, Zihan & Xian, Ming & Shu, Yong & Gong, Xiaomao & Cai, Xianzhi & Jiang, Hong & Cai, Yuanzhu & Sun, Zhipeng & Zhang, Yangang & Li, Yanwen & Zhang, Weidong & Xue, X, 2023. "Sub-ambient daytime cooling effects and cooling energy efficiency of a passive sub-ambient daytime radiative cooling coating applied to telecommunication base stations— Part 1: Distributed base statio," Energy, Elsevier, vol. 283(C).
    2. Meng, Yun & Tan, Yutong & Li, Xin & Cai, Yangjian & Peng, Jinqing & Long, Yi, 2022. "Building-integrated photovoltaic smart window with energy generation and conservation," Applied Energy, Elsevier, vol. 324(C).
    3. Sheng, Mingfeng & Pan, Haodan & Xu, Dikai & Zhao, Dongliang, 2023. "Characterization and performance enhancement of radiative cooling on circular surfaces," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).
    4. Chen, Siru & Lin, Kaixin & Pan, Aiqiang & Ho, Tsz Chung & Zhu, Yihao & Tso, Chi Yan, 2023. "Study of a passive radiative cooling coating on chemical storage tanks for evaporative loss control," Renewable Energy, Elsevier, vol. 211(C), pages 326-335.
    5. Kiyaee, Soroush & Khalilmoghadam, Pooria & Behshad Shafii, Mohammad & Moshfegh, Alireza Z. & Hu, Mingke, 2022. "Investigation of a radiative sky cooling module using phase change material as the energy storage," Applied Energy, Elsevier, vol. 321(C).
    6. Lv, Song & Zhang, Bolong & Ji, Yishuang & Ren, Juwen & Yang, Jiahao & Lai, Yin & Chang, Zhihao, 2023. "Comprehensive research on a high performance solar and radiative cooling driving thermoelectric generator system with concentration for passive power generation," Energy, Elsevier, vol. 275(C).
    7. Lv, Song & Zhang, Mingming & Tian, Junwei & Zhang, Zexu & Duan, Zhiyu & Wu, Yangyang & Deng, Yirong, 2024. "Performance analysis of radiative cooling combined with photovoltaic-driven thermoelectric cooling system in practical application," Energy, Elsevier, vol. 294(C).
    8. Zhang, Yelin & Tso, Chi Yan & Tse, Chung Fai Norman & Fong, Alan Ming-Lun & Lin, Kaixin & Sun, Yongjun, 2024. "A novel radiative sky cooler system with enhanced daytime cooling performance to reduce building roof heat gains in subtropical climate," Renewable Energy, Elsevier, vol. 220(C).
    9. Chen, Ziying & Dong, Mingyu & Wang, Cunhai, 2024. "Passive interfacial photothermal evaporation and sky radiative cooling assisted all-day freshwater harvesting: System design, experiment study, and performance evaluation," Applied Energy, Elsevier, vol. 355(C).
    10. Dong, Yan & Zhang, Xinping & Chen, Lingling & Meng, Weifeng & Wang, Cunhai & Cheng, Ziming & Liang, Huaxu & Wang, Fuqiang, 2023. "Progress in passive daytime radiative cooling: A review from optical mechanism, performance test, and application," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).
    11. Lv, Song & Ji, Yishuang & Ji, Yitong & Qian, Zuoqin & Ren, Juwen & Zhang, Bolong & Lai, Yin & Yang, Jiahao & Chang, Zhihao, 2022. "Experimental and numerical comparative investigation on 24h radiative cooling performance of a simple organic composite film," Energy, Elsevier, vol. 261(PA).
    12. Lv, Song & Sun, Xinyi & Zhang, Bolong & Lai, Yin & Yang, Jiahao, 2024. "Research on the influence and optimization of sunshade effect on radiative cooling performance," Energy, Elsevier, vol. 297(C).
    13. Seo, Junyong & Choi, Minwoo & Yoon, Siwon & Lee, Bong Jae, 2023. "Climate-dependent optimization of radiative cooling structures for year-round cold energy harvesting," Renewable Energy, Elsevier, vol. 217(C).
    14. Pirvaram, Atousa & Talebzadeh, Nima & Leung, Siu Ning & O'Brien, Paul G., 2022. "Radiative cooling for buildings: A review of techno-enviro-economics and life-cycle assessment methods," Renewable and Sustainable Energy Reviews, Elsevier, vol. 162(C).

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