RT journal article
T1 NiO nanowire-containing heat transfer nanofluids for CSP plants: Experiments and simulations to promote their application
A1 Santos Martínez, Deseada María de los
A1 Carrillo Berdugo, Iván
A1 Domínguez-Núñez, Alejandro
A1 Poce Fatou, Juan Antonio
A1 Zorrilla Cuenca, David
A1 Navas Pineda, Francisco Javier
A2 Química Física
K1 Nanofluids
K1 Concentrating solar power
K1 Thermal conductivity
K1 Specific heat
K1 Volumetric absorption
K1 Molecular dynamics
AB Concentrating solar power (CSP) is considered a clean, renewable and sustainable energy with a significantpotential to become an alternative to polluting fossil fuel-based technologies. Among CSP collectors,parabolic-trough collectors (PTC) are the most mature technology, representing nearly 90% of the currentlyinstalled collectors in CSP plants worldwide. In this technology, a heat transfer fluid (HTF) carriesthe thermal energy absorbed to a power block to produce electricity. Improving the thermal properties ofthe conventional HTF could lead to an improvement of the efficiency of CSP plants. In this sense, the useof nanofluids as the HTF in these plants can be a promising choice. Here, polycrystalline NiO nanowirecontainingnanofluids have been prepared using the conventional HTF used in CSP plants as the basefluid; that is, the eutectic and azeotropic mixture of biphenyl (26.5%) and diphenyl oxide (73.5%). The stability,rheological and thermal properties have been characterized, and an analysis of the performance ofthe nanofluids prepared in standard and volumetric absorbers have been carried out. The overall CSP systemperformance can be increased up to 34.8% using the nanofluid in a surface collector or up to 34.3%using the nanofluid in a volumetric collector, which are better than the predicted 28.5% using the conventionalHTF in a standard surface collector, thanks to the improvements in thermal properties, both specificheat and thermal conductivity. Finally, from molecular dynamics simulations we determined that themean free path of thermal vibrations is longer for monocrystalline NiO nanowires. Thus, the developmentof strategies for obtaining this kind of nanostructures is of great interest because they can furtherimprove the efficiency of these nanofluids.
PB ELSEVIER
SN 0167-7322
YR 2022
FD 2022
LK http://hdl.handle.net/10498/27070
UL http://hdl.handle.net/10498/27070
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 11-nov-2026