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- W4387363469 abstract "Thermochromic film with the ability to self-adaptively switch emittance is important for spacecraft missions experiencing rapidly increasing demand. Current research on thermochromic films primarily focuses on optimizing emittance tunability, while the solar absorptance of these films remains high, limiting their practical application in spacecraft thermal control. In this work, a VO2-based spacecraft smart radiator with low solar absorptance and high emittance tunability is proposed. The smart radiator is a multilayer structured film composed of a switchable resonator (i.e., a superposed Fabry-Perot cavity) and a solar reflector (i.e., a Distributed Bragg Reflector). The performance of the smart radiator is optimized by combining the Rigorous Coupled Wave Analysis method and Genetic Algorithm, achieving a normal solar absorptance of 0.121 and emittance tunability of 0.825. The solar absorptance and emittance tunability of the smart radiator remain excellent even at large incident angles. The underlying mechanisms involved in the smart radiator are attributed to the combination of superposed Fabry-Perot resonance and multiple solar reflectance. In addition, we provide a numerical example using a geosynchronous orbit satellite to demonstrate that the regulation range of the net heat dissipation flux density can increase from 146.5∼463.9 W/m2 by using Optical Solar Reflector to 0∼494.6 W/m2 when using the proposed smart radiator within the permissible temperature range (263.15∼318.15 K) of spacecraft. This VO2-based spacecraft smart radiator with outstanding properties which outperform the existing thermochromic films reveals the promising potential of thermochromic films for spacecraft intelligent thermal control applications." @default.
- W4387363469 created "2023-10-06" @default.
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- W4387363469 date "2024-01-01" @default.
- W4387363469 modified "2023-10-15" @default.
- W4387363469 title "Design of VO2-based spacecraft smart radiator with low solar absorptance" @default.
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- W4387363469 doi "https://doi.org/10.1016/j.applthermaleng.2023.121751" @default.
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