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Title: Photonic thermal management of coloured objects

Abstract

The colours of outdoor structures, such as automobiles, buildings and clothing, are typically chosen for functional or aesthetic reasons. With a chosen colour, however, one must control the radiative thermal load for heating or cooling purposes. Here we provide a comprehensive calculation of the tunable range of radiative thermal load for all colours. The range exceeds 680 Wm–2 for all colours, and can be as high as 866 Wm–2, resulting from effects of metamerism, infrared solar absorption and radiative cooling. We experimentally demonstrate that two photonic structures with the same pink colour can have their temperatures differ by 47.6 °C under sunlight. These structures are over 20 °C either cooler or hotter than a commercial paint with a comparable colour. Furthermore, the hotter pink structure is 10 °C hotter than a commercial black paint. Here, these results elucidate the fundamental potentials of photonic thermal management for coloured objects.

Authors:
ORCiD logo [1];  [1];  [2];  [1]
  1. Stanford Univ., Stanford, CA (United States). Dept. of Electrical Engineering, Ginzton Lab.
  2. Stanford Univ., Stanford, CA (United States). Dept. of Electrical Engineering, Ginzton Lab.; Southeast Univ., Nanjing (China). School of Mechanical Engineering
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI); California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1483402
Grant/Contract Number:  
SC0001293
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Li, Wei, Shi, Yu, Chen, Zhen, and Fan, Shanhui. Photonic thermal management of coloured objects. United States: N. p., 2018. Web. doi:10.1038/s41467-018-06535-0.
Li, Wei, Shi, Yu, Chen, Zhen, & Fan, Shanhui. Photonic thermal management of coloured objects. United States. https://doi.org/10.1038/s41467-018-06535-0
Li, Wei, Shi, Yu, Chen, Zhen, and Fan, Shanhui. Fri . "Photonic thermal management of coloured objects". United States. https://doi.org/10.1038/s41467-018-06535-0. https://www.osti.gov/servlets/purl/1483402.
@article{osti_1483402,
title = {Photonic thermal management of coloured objects},
author = {Li, Wei and Shi, Yu and Chen, Zhen and Fan, Shanhui},
abstractNote = {The colours of outdoor structures, such as automobiles, buildings and clothing, are typically chosen for functional or aesthetic reasons. With a chosen colour, however, one must control the radiative thermal load for heating or cooling purposes. Here we provide a comprehensive calculation of the tunable range of radiative thermal load for all colours. The range exceeds 680 Wm–2 for all colours, and can be as high as 866 Wm–2, resulting from effects of metamerism, infrared solar absorption and radiative cooling. We experimentally demonstrate that two photonic structures with the same pink colour can have their temperatures differ by 47.6 °C under sunlight. These structures are over 20 °C either cooler or hotter than a commercial paint with a comparable colour. Furthermore, the hotter pink structure is 10 °C hotter than a commercial black paint. Here, these results elucidate the fundamental potentials of photonic thermal management for coloured objects.},
doi = {10.1038/s41467-018-06535-0},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {Fri Oct 12 00:00:00 EDT 2018},
month = {Fri Oct 12 00:00:00 EDT 2018}
}

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Cited by: 94 works
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