EFFECTS OF TiO2 NANOPARTICLE CLUSTERS ON RADIATION CHARACTERISTICS OF NANOFLUIDS

Feng Jie; Liu Bo; Shi Guohua; Wang Ziang

doi:10.19912/j.0254-0096.tynxb.2024-0569

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 524-530. DOI: 10.19912/j.0254-0096.tynxb.2024-0569

EFFECTS OF TiO₂ NANOPARTICLE CLUSTERS ON RADIATION CHARACTERISTICS OF NANOFLUIDS

Feng Jie, Liu Bo, Shi Guohua, Wang Ziang

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Abstract

Nanofluids are widely used in solar photothermal conversion systems to improve the efficiency of the system. The radiation characteristics of nanoparticles are the key to influence solar energy absorption. In this paper, the effects of TiO₂ nanoparticle clusters on the radiation properties of nanofluids were studied. The scattering and absorption factors of individual nanoparticles and clusters were calculated by FDTD method, and the relevant radiation characteristic parameters of nanofluids were calculated according to the independent scattering theory. The multispectral radiation properties of single-cluster and multi-cluster nanofluids are discussed. It is found that the absorption coefficient of single clusters is much higher than that of single nanoparticles without clusters when the incident wavelength is 0.40-1.00 μm. For water-based nanofluids, the clusters of nanoparticles have a great influence on the radiation properties of the nanofluids. When the incident wavelength is 0.30-0.40 μm, it is found that the different proportion of clusters have little effect on the absorption coefficient of the multi-cluster nanofluids. In addition, it is found that the albedo of the nanofluid and the number of nanoparticles contained in a single cluster changes inversely at short and long incident wavelengths.

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solar energy / nanoparticles / thermal radiation / optical properties / cluster / TiO₂

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Feng Jie, Liu Bo, Shi Guohua, Wang Ziang. EFFECTS OF TiO₂ NANOPARTICLE CLUSTERS ON RADIATION CHARACTERISTICS OF NANOFLUIDS[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 524-530 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0569

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