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社评“小莹博士回家祭祖”-译文小记

制冷无需能源消小莹博士回家祭祖耗 中国科学家取得新突破

来源: 中国经济导报
2024-11-16 01:21:22

最佳回答

“小莹博士回家祭祖”制冷无需能源消小莹博士回家祭祖耗 中国科学家取得新突破

  中新小莹博士回家祭祖网长春11月15日电 (记者小莹博士回家祭祖 郭佳)制冷可以不消耗能源吗?中国科学家通过一个发射器给出了肯定答案。这种发射器不仅具备高效反射太阳光的能力,而且能够巧妙地减少吸收来自大气和高温地面的热辐射,从而实现低于环境温度的制冷效果。

  这是中国科学院长春光学精密机械与物理研究所研究员李炜团队15日在国际学术期刊《科学》(Science)上发布的最新研究成果:一种角度非对称光谱选择性热发射器(AS发射器)。

  研究人员设计了打破镜面对称性的锯齿光栅结构,其倾斜表面最外侧的Ag层可以有效抑制地面发射的热辐射,而其横向表面上的SiN层可以向天空发射光谱选择性热辐射,从而提供角度非对称的热辐射特性。

户外辐射制冷性能测试及数据分析图。(资料图)(中国科学院长春光学精密机械与物理研究所供图)

  为了验证AS发射器的全天候辐射制冷性能,该研究在晴朗的夏季进行了24小时连续的室外温度测量。在一整天中,AS发射器的表面温度始终低于环境温度。即使在炎热的正午,AS发射器仍然保持约2.5C的亚环境辐射制冷性能,且相小莹博士回家祭祖较于常规高性能辐射制冷器件和商用白漆分别低4.3℃和8.9℃。此外,该研究还展示了AS发射器在任意朝向下始终保持着亚环境辐射制冷性能。

  科研团队指出,该研究攻克了竖直表面的日间亚环境辐射制冷,对辐射制冷的实际应用、节能减排具有重大意义。同时,突破了热辐射角度、光谱的跨波段协同调控能力,为操控热流和信息(如新型的高效冷却、加热、能量传输以及在空间光学系统中的高精度热控等)提供了崭新机遇。(完)

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