Open AccessIn-line measurement of absorbed solar irradiance using nanofluids
Author(s) -
Emanuele Zanetti,
Arianna Berto,
Moreno Meneghetti,
Davide Del Col
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2116/1/012118
Subject(s) - nanofluid , materials science , pyranometer , absorption (acoustics) , solar irradiance , nanofluids in solar collectors , radiation , suspension (topology) , optics , nanoparticle , composite material , nanotechnology , meteorology , thermal , photovoltaic thermal hybrid solar collector , physics , mathematics , homotopy , pure mathematics
In this paper a novel technique for the in-line evaluation of the absorption rate of solar radiation by nanofluids in a volumetric solar receiver is presented. This method allows to experimentally investigate the optical behaviour of a nanofluid when circulating in a volumetric solar receiver under non-concentrated solar irradiance and it is based on the combined use of pyranometers. This technique is used in the present work to study the absorption capability of a Single-Wall-Carbon-NanoHorns (SWCNHs) based nanofluid. From the experiments, it can be seen that after some hours of circulation, the absorption rate of the nanofluid decreases, due to a loss of nanoparticles in the suspension.