Abstract
Abstract This paper taken SiO2 nanofluid spectral splitting PV/T system on as the object of the research, considering the effects of scattering, the Mie scattering theory combined with Monte Carlo Ray Tracing (Tracepro software) method was developed to study optical properties and solar energy conversion efficiency with SiO2 nanofluid volume fraction and particle diameter. It is found that with the diameter of the nanoparticle is 5 nm, the spectral transmittance does not change with the increasing volume fraction, and the scattering effect of the nanofluid can be neglected, while the diameter of the nanoparticle is larger than 15 nm, the spectral transmittance change greatly, and the scattering needs to be considered; with the volume fraction and the diameter of SiO2 nanofluids becoming larger, the total energy absorbed by the photothermal conversion of nanofluid increase slightly, so the scattering of SiO2 nanofluid have minor effect on photothermal conversion of PV/T system, while the photoelectric conversion efficiency reduce because of the increasing scattering coefficient, which made total solar energy conversion efficiency reduced.
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