TY - JOUR

T1 - Optical properties, thermal conductivity, and viscosity of graphene-based nanofluids for solar collectors

AU - Morozova, M. A.

AU - Osipov, A. A.

AU - Maksimovskiy, E. A.

AU - Zaikovsky, A. V.

N1 - This research was funded by Russian Scientific Foundation, Project No 22-79-00139, https://rscf.ru/project/22-79-00139/, The authors acknowledge shared research facilities VTAN at NSU for the usage of experimental equipment. The authors also acknowledge Kutateladze Institute of Thermophysics for the usage of the unique scientific equipment \u201CVacuum Gasdynamic Complex\u201D for synthesis of the materials. This research was funded by Russian Scientific Foundation, Project No 22-79-00139, https://rscf.ru/project/22-79-00139/

PY - 2024/12

Y1 - 2024/12

N2 - Nanofluids based on graphene and water are promising working fluids for use in solar collectors. In this study, the optical properties, thermal conductivity, and viscosity of nanofluids based on water and graphene material, with the addition of sodium dodecyl sulfate (SDS) surfactant, were experimentally investigated. To obtain these nanofluids, graphene nanoparticles were synthesized using a plasma-chemical method and were later characterized by scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The relationships between the concentrations of graphene in the nanofluids and the geometric parameters of vessels for effective absorption of solar energy were determined. The spectral dependences of the extinction coefficient for the nanofluids and for aqueous solutions with black aniline dye were compared. It was found that the application of graphene-based nanofluids is more effective than aqueous solutions based on aniline dye in photothermal energy conversion. Additionally, it was noted that the addition of graphene and the SDS surfactant does not lead to an increase in viscosity or a significant change in the thermal conductivity of the nanofluids for concentrations up to 0.02 wt%. The results showed that the studied nanofluids are effective absorbers of solar energy and, at the same time, do not require additional energy consumption to move through the solar harvesting circuit.

AB - Nanofluids based on graphene and water are promising working fluids for use in solar collectors. In this study, the optical properties, thermal conductivity, and viscosity of nanofluids based on water and graphene material, with the addition of sodium dodecyl sulfate (SDS) surfactant, were experimentally investigated. To obtain these nanofluids, graphene nanoparticles were synthesized using a plasma-chemical method and were later characterized by scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The relationships between the concentrations of graphene in the nanofluids and the geometric parameters of vessels for effective absorption of solar energy were determined. The spectral dependences of the extinction coefficient for the nanofluids and for aqueous solutions with black aniline dye were compared. It was found that the application of graphene-based nanofluids is more effective than aqueous solutions based on aniline dye in photothermal energy conversion. Additionally, it was noted that the addition of graphene and the SDS surfactant does not lead to an increase in viscosity or a significant change in the thermal conductivity of the nanofluids for concentrations up to 0.02 wt%. The results showed that the studied nanofluids are effective absorbers of solar energy and, at the same time, do not require additional energy consumption to move through the solar harvesting circuit.

KW - Graphene

KW - Light absorption

KW - Nanofluid

KW - Solar collector

KW - Solar energy

KW - Thermal conductivity

KW - Viscosity

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85209687204&origin=inward&txGid=5adcb588f355e280adc159c60ac7a814

UR - https://www.mendeley.com/catalogue/75bde28b-b5b3-358a-90b2-c8f912ac0e41/

U2 - 10.1016/j.nanoso.2024.101409

DO - 10.1016/j.nanoso.2024.101409

M3 - Article

VL - 40

JO - Nano-Structures and Nano-Objects

JF - Nano-Structures and Nano-Objects

SN - 2352-507X

M1 - 101409

ER -