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First Thermal and Fluids Engineering Summer Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

Light absorption using plasmonic nanofluid for volumetric solar collector

DOI: 10.1615/TFESC1.ecv.012599
pages 685-688

Jongwook Jeon
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea

Bong Jae Lee
KAIST Department of Mechanical Engineering, 291, Daehak-ro, Yuseong-gu, Daejeon 34141, South Korea


KEY WORDS: Volumetric Solar Collector, Plasmonic Nanofluids

Abstract

A volumetric solar collector is different from conventional surface-based solar collectors in a way that it eliminates the need of additional absorbing mechanism such as black absorbing plate. The absence of black absorbing plate is beneficial to the overall device efficiency since the radiation loss originating from heated black surface would decrease greatly. In order to make full use of this advantage, volumetric solar collector should be accompanied with heat transfer fluid that can effectively absorb sunlight, and plasmonic nanofluid is suggested as a promising candidate. Plasmonic nanofluid stands for the fluid that contains nano-sized metallic particles supporting localized surface plasmon resonace (LSP). LSP is a collective oscillation of electrons occurring at the surface of metallic particle whose size is smaller than the wavelength of incident light. When LSP is excited, strong enhancement of light absorption and scattering of light by the particle is observed. The plasmon raises the temperature of the particle and eventually the base fluid in which the particle is dispersed. In this study, plasmonic nanofluid based on gold nanorod is employed, and its light absorption capability was investigated using theoretical and experimental method.

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