2D MoSe2-based nanofluids prepared by liquid phase exfoliation for heat transfer applications in concentrating solar power

Teruel, Miriam; Aguilar, Teresa; Martínez-Merino, Paloma; Carrillo‐Berdugo, Iván; Gallardo-Bernal, Juan Jesús; Gómez‐Villarejo, Roberto; Alcántara, Rodrigo; Fernández‐Lorenzo, Concha; Navas, Javier

doi:10.1016/j.solmat.2019.109972

Cited by 31 publications

(16 citation statements)

References 51 publications

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“…A promising strategy for such purposes is to use nanofluids , as heat transfer fluids (HTF). Nanofluids, compared to conventional HTF, exhibit enhanced thermophysical properties for convection heat transfer, − which is significant for heat transfer from the surface receiver to the HTF and from the HTF to the heat exchanger in the steam generator. Additionally, if their absorption and scattering properties provide enough optical efficiency, ,− some nanofluids can be used as volumetric absorbers in parabolic-trough receivers for directly harvesting concentrated solar radiation .…”

Section: Introductionmentioning

confidence: 99%

Optical and Transport Properties of Metal–Oil Nanofluids for Thermal Solar Industry: Experimental Characterization, Performance Assessment, and Molecular Dynamics Insights

Carrillo‐Berdugo

Estellé

Sani

et al. 2021

ACS Sustainable Chem. Eng.

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Concentrating solar power (CSP) technology can become a very valuable contributor to the transformation and decarbonization of our energy landscape, but for this technology to overcome the barrier towards market deployment, significant enhancements in the solar-to-thermal-toelectric energy conversion efficiency are needed. Here, an in-depth experimental analysis of the optical and transport properties of Pd-containing aromatic oil-based nanofluids is presented, with promising results for their prospective use as volumetric absorbers and heat transfer fluids in next-generation parabolic-trough CSP plants. A 0.030 wt.% concentration of Pd nanoplates increases sunlight extinction by 90% after 20 mm propagation length and thermal conductivity by 23.5% at 373 K, which is enough to increase the overall system efficiency up to 45.3% and to reduce pumping requirements by 20%, with minimum increases in the collector length. In addition to that, molecular dynamics simulations are used to gain atomistic-level insights about the heat and momentum transfer in these nanofluids, with a focus on the role played by the solidliquid interface in these phenomena. Molecules chemisorbed at the interface behave as a shelterlike boundary that hinders heat conduction, as a high thermal resistance path, and minimizes the impact of the solid on dynamic viscosity, as it weakens the interactions between the nanoplate and the surrounding non-adsorbed fluid molecules.

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Section: Introductionmentioning

confidence: 99%

Optical and Transport Properties of Metal–Oil Nanofluids for Thermal Solar Industry: Experimental Characterization, Performance Assessment, and Molecular Dynamics Insights

Carrillo‐Berdugo

Estellé

Sani

et al. 2021

ACS Sustainable Chem. Eng.

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“…the higher increase found in nanofluids based in TMCs is about 7.6% for MoSe2-based nanofluids [65].…”

Section: Resultsmentioning

confidence: 71%

“…This increase is referred to the values measured for the pure HTF because they were measured in the same conditions in our lab. Additionally, the enhancement in isobaric specific heat found in this work is interesting because, to our knowledge, the higher increase found in nanofluids based in TMCs is about 7.6% for MoSe 2 -based nanofluids [ 65 ].…”

Section: Resultsmentioning

confidence: 95%

The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy

et al. 2020

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Transition metal dichalcogenides (TMCs) exhibit unique properties that make them of interest for catalysis, sensing or energy storage applications. However, few studies have been performed into nanofluids based on TMCs for heat transfer applications. In this study, nanofluids based on 2D-WS2 are prepared by liquid phase exfoliation to analyze their potential usage in concentrating solar power plants. Periodic-Density Functional Theory (DFT) calculations were performed to rationalize the success of the exfoliation process. The hydrogen bond interaction between the hydroxyl group from PEG, which acts as a surfactant, and the S atoms of the WS2 surface stabilizes the nanosheets in the fluid. Electron localization function (ELF) analysis is indicative of the stability of the S–H interaction from WS2 with the molecules of surfactant due to the tendency to interact through weak intermolecular forces of van der Waals solids. Moreover, improvements in thermal properties were also found. Isobaric specific heat increased by up to 10% and thermal conductivity improved by up to 37.3%. The high stability of the nanofluids and the thermal improvements were associated with the high surface area of WS2 nanosheets. These results suggest that these nanofluids could be a promising heat transfer fluid in concentrating solar power plants.

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“…It is suggested that due to the low filler fraction used, the observed enhancement on thermal conductivity is due to molecular interactions (collisions) between the fluid and the 2D nanostructures [ 7 , 14 , 37 , 53 , 68 , 69 ]. However, observing thermal conductivity behavior during the temperature-dependent evaluations indicates that this increase is based on the percolation mechanism as well as the contribution of the Brownian motion of the sheet-like nanostructures [ 70 , 71 , 72 ]. As the concentration of 2D nanostructures is increased in the synthetic or natural esters, the chance of phonons to get scattered in the contiguous nanostructures increases proportionally, which leads to enhanced contact conductance [ 73 ].…”

Section: Resultsmentioning

confidence: 99%

Thermal Conductivity Performance of 2D h-BN/MoS2/-Hybrid Nanostructures Used on Natural and Synthetic Esters

et al. 2020

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In this paper, the thermal conductivity behavior of synthetic and natural esters reinforced with 2D nanostructures—single hexagonal boron nitride (h-BN), single molybdenum disulfide (MoS2), and hybrid h-BN/MOS2—were studied and compared to each other. As a basis for the synthesis of nanofluids, three biodegradable insulating lubricants were used: FR3TM and VG-100 were used as natural esters and MIDEL 7131 as a synthetic ester. Two-dimensional nanosheets of h-BN, MoS2, and their hybrid nanofillers (50/50 ratio percent) were incorporated into matrix lubricants without surfactants or additives. Nanofluids were prepared at 0.01, 0.05, 0.10, 0.15, and 0.25 weight percent of filler fraction. The experimental results revealed improvements in thermal conductivity in the range of 20–32% at 323 K with the addition of 2D nanostructures, and a synergistic behavior was observed for the hybrid h-BN/MoS2 nanostructures.

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2D MoSe2-based nanofluids prepared by liquid phase exfoliation for heat transfer applications in concentrating solar power

Cited by 31 publications

References 51 publications

Optical and Transport Properties of Metal–Oil Nanofluids for Thermal Solar Industry: Experimental Characterization, Performance Assessment, and Molecular Dynamics Insights

Optical and Transport Properties of Metal–Oil Nanofluids for Thermal Solar Industry: Experimental Characterization, Performance Assessment, and Molecular Dynamics Insights

The Role of the Interactions at the Tungsten Disulphide Surface in the Stability and Enhanced Thermal Properties of Nanofluids with Application in Solar Thermal Energy

Thermal Conductivity Performance of 2D h-BN/MoS2/-Hybrid Nanostructures Used on Natural and Synthetic Esters

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