Radiative cooling can be used to reduce building air-conditioning requirements. In urban environments, nearby buildings partially block access to the sky, which hinders radiative cooling, but a thermal beam-shaping design can help solve this problem.
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Yang, R., Yin, X. Passive cooling in an urban setting. Nat Sustain 2, 663–664 (2019). https://doi.org/10.1038/s41893-019-0358-3
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DOI: https://doi.org/10.1038/s41893-019-0358-3
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