분광 선택적 역설계를 통한 무고분자 다층 투명 복사 냉각기
Polymer-free Multilayer Visibly Transparent Radiative Cooler via Spectrally Selective Inverse Design
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초록
Radiative cooling is a promising approach for sustainable thermal management that does not consume energy. We developed a polymer-free, multilayer, visibly transparent radiative cooler (PF-MTRC) structure. We designed this structure using a spectrally selective inverse design method based on particle swarm, and we evaluated the performance of the structure through numerical simulations. The visible light transparency, near-infrared reflectance, and mid- infrared absorptivity of a single six-layer PF-MTRC structure were 58.7%, 74.7%, and of 84%, respectively. The solar reflectance and the mid-infrared emissivity of the PF-MTRC were higher than and comparable to those of the conventional polymer-based emitter layer, respectively, demonstrating higher spectral selectivity within a single multilayer design. Additionally, the PF-MTRC was highly stable in the tolerance to thickness variations during fabrication. PF-MTRC shows the potential to overcome the durability issues of conventional polymer-based structures for applications in transparent passive cooling devices.
Abstract
Radiative cooling is a promising approach for sustainable thermal management that does not consume energy. We developed a polymer-free, multilayer, visibly transparent radiative cooler (PF-MTRC) structure. We designed this structure using a spectrally selective inverse design method based on particle swarm, and we evaluated the performance of the structure through numerical simulations. The visible light transparency, near-infrared reflectance, and mid- infrared absorptivity of a single six-layer PF-MTRC structure were 58.7%, 74.7%, and of 84%, respectively. The solar reflectance and the mid-infrared emissivity of the PF-MTRC were higher than and comparable to those of the conventional polymer-based emitter layer, respectively, demonstrating higher spectral selectivity within a single multilayer design. Additionally, the PF-MTRC was highly stable in the tolerance to thickness variations during fabrication. PF-MTRC shows the potential to overcome the durability issues of conventional polymer-based structures for applications in transparent passive cooling devices.