Cited by 167Thermal Radiation and Cooling TechnologiesMetamaterials and Metasurfaces ApplicationsThermal properties of materials

Recent Progress in Daytime Radiative Cooling: Is It the Air Conditioner of the Future?

Open access
Santamouris, Mattheos, Feng, Jie·2018·Buildings

Abstract

Radiative cooling is a well-researched area. For many years, surfaces relying on radiative cooling failed to exhibit a sub-ambient surface temperature under the sun because of the limited reflectance in the solar spectrum and the reduced absorptivity in the atmospheric window. The recent impressive developments in photonic nanoscience permitted to produce photonic structures exhibiting surface temperatures much below the ambient temperature. This paper aims to present and analyze the main recent achievements concerning daytime radiative cooling technologies. While the conventional radiative systems are briefly presented, the emphasis is given on the various photonic radiative structures and mainly the planar thin film radiators, metamaterials, 2 and 3D photonic structures, polymeric photonic technologies, and passive radiators under the form of a paint. The composition of each structure, as well as its experimental or simulated thermal performance, is reported in detail. The main limitations and constraints of the photonic radiative systems, the proposed technological solutions, and the prospects are presented and discussed.

Integrity signals

Registry

Crossref · 10.3390/buildings8120168

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90 of 90 references verified0 citation errors · 0 not checkable

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  • Buildings can make use of roof ponds, movable insulation systems, radiators, or existing solar heating systems integrated as passive or active systems that extract heat from the indoor environment and release it to the sky.

    “However, buildings can also make use of roof ponds, movable insulation systems, radiators, or existing solar heating systems integrated as passive or active systems (with or without pumps and fans) that extract the heat from the indoor environment and release it to the sky [92,226,228].”
  • Recent progress in solar reflective materials with high emissivity in the atmospheric window may further enhance sky radiative cooling's restorative capacity because cooling could be achieved during the day.

    “However, recent progress in solar reflective materials with high emissivity in the atmospheric window may further enhance the sky radiative cooling's restorative capacity as cooling could be achieved concurrently with the demand, i.e. during the day [92,228].”

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Authors
Santamouris, M., & Feng, J.
Affiliations
UNSW Sydney (AU)
Corresponding author
Santamouris, Mattheos
Venue
Buildings
Publisher
MDPI AG
Published
2018-11-30
Volume
8
Issue
12
Pages
168
ISSN
2075-5309 (ISSN-L)
OpenAlex
W2903034540
Cited by
167
References
91
Citations by year
2026: 12 · 2025: 14 · 2024: 27 · 2023: 32 · 2022: 24 · 2021: 28 · 2020: 22 · 2019: 8
FWCI
13.04
Type
journal article
Language
en
Open access
Locations
  • Buildings (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Physical Sciences › Engineering › Civil and Structural Engineering › Thermal Radiation and Cooling Technologies
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Metamaterials and Metasurfaces Applications
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
Keywords
radiative cooling, daytime cooling, photonic structures, metamaterials, atmospheric window, solar reflectance, passive radiators, air conditioning

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