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Numerical study of high emissivity metamaterials for radiative cooling application

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Abstract

In this research, we designed a disc structure metamaterial emitter using silver and titanium dioxide for radiative cooling applications. We used COMSOL Multiphysics software for numerical simulations, considering temperature changes induced by atmospheric and surface radiation. The results of the numerical simulations demonstrated that the designed emitter had an average emissivity of 89.5% within the atmospheric transparency window, which spans from 8 to 13 µm. Furthermore, the designed emitter has the potential to achieve a radiative cooling power of 200.4 W/m2 at an ambient temperature of 300 K and can reach an equilibrium temperature of 268.25 K. Impressively, the designed emitter can cool down to 31.75 °C below the ambient temperature. Based on the results of our research, metamaterial emitter has the potential to be crucial components in the development of energy-efficient radiative cooling devices. Therefore, this work further contributes to the advancement of passive radiative coolers based on metal–dielectric–metal.

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Authors and Affiliations

  1. Department of Physics, College of Natural and Computational Science, Mizan-Tepi University, Tepi, Ethiopia

    Wendimu Minalu

  2. Department of Applied Physics, School of Applied Natural Science, Adama Science and Technology University, Adama, Ethiopia

    Fekadu Tolessa

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  1. Wendimu Minalu
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  2. Fekadu Tolessa
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Contributions

All authors contributed to the study’s conception and design. The processes of conceptualizing, designing, data analysis, and interpretation were performed by all authors (WM and FT). The first draft of the manuscript was written by WM, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript after critical revision. All authors met the requirements for authorship, and they confirm that the manuscript represents honest work.

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Correspondence to Fekadu Tolessa.

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Minalu, W., Tolessa, F. Numerical study of high emissivity metamaterials for radiative cooling application. Indian J Phys (2024). https://doi.org/10.1007/s12648-024-03139-x

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