编号：CDUT-2023-41

标题：Enhancement of solar absorption performance using TiN@SiCw plasmonic nanofluids for effective photo-thermal conversion: Numerical and experimental investigation

入藏号：WOS:000838298200005

中国科学院文献情报中心期刊分区： 工程技术1区/TOP（2022）

本校作者：文劲，李小可*，张赫

来源出版物：RENEWABLE ENERGY  卷: 193  页: 1062-1073

出版年：2022

第一地址：成都理工大学

关键词：Solar energy; Composite nanofluid; Plasmonic nanofluid; Photothermal conversion efficiency

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摘要：The heat exchange medium moderately determines the heat utilization efficiency of solar energy. Nanofluids, a type of working fluids with high thermal conductivity and strong light absorption, have been studied and applied to improve solar energy utilization. In this study, TiN@SiCw binary composite nanoparticles were prepared by a coupling agent method. The optical coupling absorption properties of TiN and SiCw nanoparticles were numerically simulated by the finite-difference time-domain method. Results showed the TiN@SiCw nanostructure can improve the width and intensity of spectral absorption. Then TiN@SiCw and SiCw nanofluids based on ethylene glycol were prepared by a two-step method and studied experimentally in terms of thermal conductivity and optical absorption. The photothermal conversion efficiency of the nanofluids was measured by a special flow and photothermal coupling model (side radiation). Experiments showed the thermal conductivity and light absorption of TiN@SiCw composite nanofluids were stronger than those of SiCw single-component nanofluids and the base fluid. Specifically, the energy absorption fraction and the photo-thermal efficiency of TiN@SiCw nanofluids at the highest concentration of 140 ppm were 96.2% and 90.5%, respectively, which were 12.1% and 21.7% higher respectively compared with SiCw nanofluids. Hence, the TiN@