Nanotechnology in Solar Lighting

In recent years, many scholars over the world have studied the enhanced heat transfer and spectral control properties of nanomaterials. As the research progresses, nanofluids present more and more mutual matching enhancements with solar energy utilization technologies. The development of nanotechnology in recent years offers the possibility to properly solve the local overheating at the input end of optical fibers and ensure the efficient output of converging beams under high concentration. The study of radiation characteristics of nanoparticles is mainly to calculate the reflection and scattering characteristic solutions of particles with a certain shape, size, and optical constant based on the max-well equation. Usually, a spectrophotometer is used to measure the spectral transmittance or absorbance of the nanofluid, and its extinction coefficient is calculated according to the Lambert-Beer law, and then the percentage of solar energy absorbed by the nanoparticles is obtained through calculation.