Multi-layered Ti–Si solar absorber design based on tungsten material for solar thermal energy conversion

Abstract

We present a solar absorber with a higher absorptance with Multi-layers Titanium (Ti)- Silicon (Si) based on Tungsten material. Tungsten is used as a ground layer, and Si and Ti are stacked in multilayered positions above that. The absorptance can be calculated in six peak wavelengths between the overall wavelength spectrum for 0.2–3 μm. The overall solar absorptance is 93.87% with a bandwidth of 2300 nm, above 95% with a bandwidth of 1000 nm, and above 97% at 800 nm. The situation of solar absorptance is improved by adding multi-layered structure and this is also exhibited with the respective absorptance (A), reflectance (R), and transmittance (T) step by step. Moreover, all absorptance are distributed in one figure, and AM 1.5 figure is also included. The solar absorption variation can also be checked by changing the parameters of ground layer width and thickness, and Ti and Si resonator thickness. The solar absorption situation can be expressed in TE and TM modes by changing the degree from 0 to 50. The electric field intensity and comparison between other published works are also presented. Thus, the proposed solar absorber can be possible to use in many ways with a higher absorptance. It can be provided from individual home facilities to production in large industries.