Enhanced radiative/evaporative cooling from air eddies above zebra stripes: A deductive approach

Abstract

As for maximizing efficiency of evaporation, utilizing the heating power of nature, specifically the sun, has gained significant research interest, in modern society. In order to successfully demonstrate this, we employ zebra- patterned cellulose acetate(CA) fiberous network on the surface of the LiBr hydrogel sample. The hydrogel possesses the ability to absorb moisture from the atmosphere and retain the water within the structure, while the CA networks desired to wick the water for evaporation, facilitating continuous evaporative cooling. Given the numerical study presented by Austin et al. (2022) that zebra-striped roof buildings demonstrate lower internal temperatures in comparison to all-white roof buildings, the proposed statement appears to be plausible. The incorporation of a zebra-pattern atop a hydrogel, accompanied by localized heating of the sample surface corresponding to the regions occupied by the black stripes, paradoxically, has the potential to enhance the cooling performance beyond that achievable through sole radiative cooling or radiative/evaporative cooling methods.