Investigation on absorptivity control of thermochromatic materials

Spectral control characteristics of one-dimensional microstructure is introduced for the investigation of absorption features of a (La_1-xSr_x) MnO₃ type thermochromatic material. The matching characteristic between the one-dimensional microstructure and the thermochromatic material is analyzed based on the energy distribution of solar radiation and operation temperature of the thermochromatic material, and the spectroscopic property as well as the bandwidth of the one-dimensional microstructure is determined. A genetic algorithm optimization design is carried out for the one-dimensional microstructure. The spectroscopic property of the optimal microstructure is calculated, based on which the absorption control performance and the feature of emissivity variation of the microstructure are calculated.