Enhanced Color-Preserving Radiative Coolers for Versatile Architectural Applications

June Tae Kim, Seung Kyu Jeon, Min Seong Kim, Dong Hun Yeo, Sahn Nahm, Yeong Jae Kim, Gil Ju Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Global climate crises are the most significant challenges to be solved these days. As one of the technological endeavors to tackle the issue, radiative cooling is amongst the most attractive approaches for sustainable heat energy regulation, which involves maximizing solar heat reflection and thermal heat emission. These green technologies inevitably require architectural applicability, considering that building facades take a large proportion of the heat-radiating surfaces. For mass-production suitability and durability, radiative coolers (RCs) fabricated in a fully ceramic context are recently suggested, featuring scalable, thermally insulative, and non-shrinking advantages. However, the visual effects are also imperative for architectural instances but are seldom accounted for. In this context, this article suggests the enhanced color-preserving radiative cooling (ECRC) structure for practical architectural applications of glass-infiltrated ceramic RCs. By simply blending ceramic pigment into the uppermost porous alumina layer, the ECRC structure can maintain the physical, and thermal features of all-ceramic RC, while exhibiting color by visible reflectance adjustment. ECRCs exhibit an additional cooling performance of up to ≈17.3 °C depending on their color, compared to their conventional counterparts. With additional chromatic features, ECRC can further enhance the availability of radiative cooling technology for practically realizing the energy-saving structures in real-world architectural circumstances.

Original languageEnglish
JournalAdvanced Optical Materials
DOIs
Publication statusAccepted/In press - 2024

Bibliographical note

Publisher Copyright:
© 2024 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.

Keywords

  • glass infiltration
  • multi-layer
  • non-shrinkable ceramics
  • passive radiative cooling
  • thermal management

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Fingerprint

Dive into the research topics of 'Enhanced Color-Preserving Radiative Coolers for Versatile Architectural Applications'. Together they form a unique fingerprint.

Cite this