Hu Run, Chen Zihe, Kim Sun-Kyung
School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Department of Applied Physics, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
Research (Wash D C). 2024 Dec 20;7:0563. doi: 10.34133/research.0563. eCollection 2024.
Radiative cooling has witnessed substantial progress while its performance is constrained by the thermal reciprocal Kirchhoff's law. Violating Kirchhoff's law to pursue nonreciprocal radiative cooling seems promising; however, the energy conservation requirement and radiant flux integrated over the entire hemisphere make the nonreciprocal benefit insignificant. This commentary discusses the practical limits of nonreciprocal radiative cooling and points toward the future direction of directional radiative cooling.
辐射冷却已取得显著进展，但其性能受到热互易基尔霍夫定律的限制。违反基尔霍夫定律以追求非互易辐射冷却似乎很有前景；然而，能量守恒要求以及在整个半球上积分的辐射通量使得非互易优势并不显著。本评论讨论了非互易辐射冷却的实际限制，并指出了定向辐射冷却的未来方向。
