Record Passive Radiative Cooling of over 15 °C by a Micro-Nanoporous Granular Composite Film
Source abstract
Abstract
Energy-free cooling via passive daytime radiative cooling (PDRC) has great potential for various applications. It is still challenging to develop an inexpensive PDRC material with high temperature reduction. Here, we report a micro-nanoporous granular composite film with an outdoor temperature decrease of over 15 °C. The success relies on the unique micro-nanoporous granular structure that couples strong multiple scattering and surface phonon polariton, leading to a high solar reflectance of 96.2%. Significantly, the thermal emissivity reaches 98.3% within the atmospheric transmittance window, which is the highest value reported to date. Moreover, the film presents a hydrophobicity and mechanical elasticity.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Thermal Radiation and Cooling Technologies · Radiative Heat Transfer Studies · Urban Heat Island Mitigation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, P. R. China
Funding
National Natural Science Foundation of China · Shaanxi Provincial Science and Technology Innovation Team · Zhuhai Innovation and Entrepreneurship Team Project
References (29)
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