RADIATIVE COOLING WITH SOLAR SPECTRUM REFLECTION

摘要

Various aspects as described herein are directed to a radiative cooling apparatuses and methods for cooling an object. As consistent with one or more embodiments, a radiative cooling apparatus includes an arrangement of a plurality of different material located at different depths along a depth dimension relative to the object. The plurality of different material includes a solar spectrum reflecting portion configured and arranged to suppress light modes, thereby inhibiting coupling of the incoming electromagnetic radiation, of at least some wavelengths in the solar spectrum, to the object at a range of angles of incidence relative to the depth dimension. Further, the plurality of material includes a thermally-emissive arrangement configured and arranged to facilitate, simultaneously with the inhibiting coupling of the incoming electromagnetic radiation, the thermally-generated electromagnetic emissions from the object at the range of angles of incidence and in mid-IR wavelengths.

主权项

1. A radiative cooling apparatus for cooling an object comprising:
an arrangement of a plurality of different material located at different depths along a depth dimension relative to the object, the plurality of different material including:
a solar spectrum reflecting portion configured and arranged to suppress light modes, thereby inhibiting coupling of incoming electromagnetic radiation, of at least some wavelengths in the solar spectrum, to the object at a range of angles of incidence relative to the depth dimension; anda thermally-emissive portion that includes a portion of the different material that is arranged in the depth dimension to facilitate, simultaneously with the inhibiting coupling of the incoming electromagnetic radiation, thermally-generated electromagnetic emissions from the object at the range of angles of incidence and in mid-IR wavelengths.