Potential of carbon nanohorn-based suspensions for solar thermal collectors

Sani, Elisa; Mercatelli, Luca; Barison, S.; Pagura, C.; Agresti, F.; Colla, Laura; Sansoni, P.

doi:10.1016/j.solmat.2011.06.011

Cited by 194 publications

(85 citation statements)

References 34 publications

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“…As we only conducted gold nanoparticle in this work, it would be interesting to compare the results with other published studies to examine the material's effect. However as briefly reviewed in the Introduction, a lot of the studies were based on the optical properties and characterized by the extinction coefficient only [2,3,4,8,9] , which makes impossible to compare the photothermal conversion efficiency. Figure 8 shows the comparison of the enhancement ratio in the photothermal conversion efficiency of GNP with spherical graphite particles (~30 nm diameter) and carbon nanotubes (6-20 nm diameter, 1000-5000 nm in length) [2] .…”

Section: Materials Influencementioning

confidence: 99%

“…The photothermal conversion efficiency of a range of nanomaterials were experimentally investigated [1][2][3][4][5][6] and a few theories were proposed to maximize the conversion efficiency under optimized particle concentrations [2,7,8] . These studies show that certain nanoparticle can absorb sun light directly, which may pave the way for a new generation of solar thermal energy system.…”

Section: Introductionmentioning

confidence: 99%

“…These studies show that certain nanoparticle can absorb sun light directly, which may pave the way for a new generation of solar thermal energy system. However there are still a number of issues that requires special attention: i) only limited nonmaterials have been investigated and it is still unclear about the optimized material and particle concentration; ii) it is unclear about the photothermal conversion mechanisms, especially regarding the interaction between nanoparticles, the solar light and the base fluid, and iii) a lot of studies were based on the optical properties and characterized by the extinction coefficient [2,3,4,8,9] , with limited direct photothermal conversion experiments. The extinction coefficient is a key factor to illustrate the wavelength-selective absorbing feature of nanoparticles; however it may not represent the real photo-thermal energy conversion process.…”

Section: Introductionmentioning

confidence: 99%

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Photothermal conversion characteristics of gold nanoparticle dispersions

et al. 2014

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This work proposes and validates a novel idea of using plasmonic nanoparticles (PNP) to improve the solar thermal conversion efficiency. Gold nanoparticle (GNP) is synthesized from an improved citrate-reduction method, and used as an example to illustrate the photothermal conversion characteristics of PNPs under a solar simulator. The experimental results show that GNP has the best photo-thermal conversion capability comparing to other reported materials. At the lowest particle concentration examined (i.e., 0.15 ppm), GNP increases the photo-thermal conversion efficiency of the base fluid by 20% and reaches a specific absorption rate (SAR) of ~10 kW/g. The photo-thermal conversion efficiency increases with increasing particle concentrations, but the SAR shows a reverse trend, which is unexpected as all GNPs should be still in the independent scattering regime.

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Section: Materials Influencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photothermal conversion characteristics of gold nanoparticle dispersions

et al. 2014

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“…Sani et al [13] carried out an experimental investigation to study the potential of carbon nanohorn (CNH)-based suspensions for solar thermal collectors. In this paper the optical characterization of new fluid made up of single-wall carbon nanohorns (SWCNH) and ethylene glycol as a base fluid for solar energy applications were studied.…”

Section: Sani Et Al [12]mentioning

confidence: 99%

A Review on the Performance of the Nanofluid Based Solar Collectors - Solar Energy

Sharma¹,

Singh²,

Yadav³

et al. 2015

International Conference on Advancements and Recent Innovations in Mechanical, Production and Industrial Engineering

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Using nanofluids as an innovative kind of liquid blend with a trivial volume fraction (in percent) of nanometer-sized solid particles in suspension is a fairly a novel arena or idea. The objective of this presented review paper is to inspect the performance of the nanofluid-based solar collector (NBSC). In past few years for a number of experimental and industrial thermal engineering systems solar energy has proven to be the best input energy source. The scarcity of fossil fuels and environmental contemplations motivated the researchers to utilize alternative energy sources such as solar energy, wind energy, tidal energy etc. Therefore, it is essential to boost the performance of the solar thermal engineering systems. Because of better rheological properties nanofluids are utilized to build up the performance of conventional solar thermal engineering systems. Therefore, major part of this presented review paper lays a main emphasis to investigate the effects of nanofluids on the performance of solar collectors. Some proposals are also given to use the nanofluids for future work in different solar thermal engineering systems such as parabolic trough systems (PTS), solar thermoelectric cells and finally, the challenges of using nanofluids in solar energy devices are reviewed in brief.

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“…Thus, the use of nanofluids as direct solar absorbers in either solar collectors and light-induced phase separation had been investigated by several groups [173][174][175][176][177][178] and with different NPs [138,[179][180][181][182], demonstrating that the most important factors influencing nanofluid properties are size, shape and agglomeration state of nanoparticles [183,184]. Therefore, a general synthesis technique that promotes a high control over those parameters for a wide range of materials that also fulfils the 12 principles of a "green" chemistry technique is mandatory [185].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of colloidal nanomaterials through femtosecond laser ablation

Mendieta¹,

Omar²

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les queda respirar / abrir los ojos descubrir las raíces del horror inventar paz así sea a ponchazos entenderse con la naturaleza y con la lluvia y los relámpagos y con el sentimiento y con la muerte esa loca de atar y desatar.¿qué les queda por probar a los jóvenes en este mundo de consumo y humo?¿vértigo? ¿asaltos? ¿discotecas?también les queda discutir con dios tanto si existe como si no existe tender manos que ayudan / abrir puertas entre el corazón propio y el ajeno / sobre todo les queda hacer futuro a pesar de los ruines de pasado y los sabios granujas del presente.

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Potential of carbon nanohorn-based suspensions for solar thermal collectors

Cited by 194 publications

References 34 publications

Photothermal conversion characteristics of gold nanoparticle dispersions

Photothermal conversion characteristics of gold nanoparticle dispersions

A Review on the Performance of the Nanofluid Based Solar Collectors - Solar Energy

Synthesis of colloidal nanomaterials through femtosecond laser ablation

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