Experimental investigation on the plasmonic blended nanofluid for efficient solar absorption

•Plasmonic effect is introduced in solar thermal areas to enhance light absorption.•A plasmonic blended nanofluid is proposed and a broadband absorption is obtained.•A heat transfer model coupled with RTE is established to verify experimental results.•The simulation results are consistent with the e...

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Bibliographic Details
Published in:Applied thermal engineering 2019-10, Vol.161, p.114192, Article 114192
Main Authors: Duan, Huiling, Zheng, Yuan, Xu, Chang, Shang, Yuanfang, Ding, Fan
Format: Article
Language:English
Subjects:
Absorption
Blended nanofluid
Broadband absorption
Computer simulation
Fluid dynamics
Gold
Heat transfer
Nanofluids
Nanoparticles
Optical properties
Photothermal performance
Plasmonic effect
Simulation
Solar energy
Solar radiation
Thermodynamic properties
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Summary:•Plasmonic effect is introduced in solar thermal areas to enhance light absorption.•A plasmonic blended nanofluid is proposed and a broadband absorption is obtained.•A heat transfer model coupled with RTE is established to verify experimental results.•The simulation results are consistent with the experimental results.•A match between extinction spectrum and solar spectrum contribute to temperature rise. A plasmonic blended nanofluid formed by mixing Au nanoparticles with different shapes in water is proposed in this paper for direct solar absorption. Optical and thermal properties of the plasmonic blended nanofluid are studied numerically and experimentally. Resonant characteristics of Au plasmonic nanoparticles are tuned by particle shapes. Compared with single-component nanofluid, the extinction spectrum of this plasmonic blended nanofluid is broadened. The matching of extinction spectrum and solar radiation spectrum is tuned by adjusting the proportion of components in blended nanofluid. Photothermal properties of three types of plasmonic blended nanofluids are measured experimentally. Due to the higher extinction coefficient, the blended nanofluid exhibits higher temperature rise. A simplified heat transfer model is established to verify experimental results. Simulation results are consistent with experimental results. Before experiment, photothermal properties of different nanofluids can be qualitatively compared by using the simulation model, which can effectively reduce the number and cost of experiments.
ISSN:1359-4311
1873-5606
DOI:10.1016/j.applthermaleng.2019.114192