An investigation of thermal stability of carbon nanofluids for solar thermal applications

Mesgari, Sara; Taylor, Robert A.; Hjerrild, Natasha E.; Crisostomo, Felipe; Li, Qiyuan; Scott, Jason

doi:10.1016/j.solmat.2016.07.032

Cited by 72 publications

(24 citation statements)

References 56 publications

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“…CNTs provide the highest spectral absorptivity (particularly on a per unit mass basis) over the entire solar range and they are present in different forms: single-walled carbon nanotubes (SWCNTs), double-walled carbon nanotubes (DWCNTs) and multi-walled carbon nanotubes (MWCNTs) (Fig 1) [6]. SWCNTs are formed by wrapping a one-atom-thick layer of graphene into a seamless cylinder while DWCNTs and MWCNT are formed by concentrically wrapping two and multiple layers of graphite, respectively [7].…”

Section: Carbon Nanotubes (Cnt)mentioning

confidence: 99%

See 1 more Smart Citation

Nanomaterials and nanofluids – new materials for building integrated solar thermal systems

Nikolić¹,

Skerlić²,

Radulović³

et al. 2017

Zbornik Radova Pisanih Za 5. Međunarodnu Konferenciju O Obnovljivim Izvorima Električne Energije

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Section: Carbon Nanotubes (Cnt)mentioning

confidence: 99%

“…Up to a 10% increase in the efficiency has been reported through the use of nanofluids compared to conventional collectors [7].…”

Section: Nanofluidsmentioning

confidence: 99%

Nanomaterials and nanofluids – new materials for building integrated solar thermal systems

Nikolić¹,

Skerlić²,

Radulović³

et al. 2017

Zbornik Radova Pisanih Za 5. Međunarodnu Konferenciju O Obnovljivim Izvorima Električne Energije

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“…In the case of high-temperature applications, MWCNT nanofluid had better stability at more than 250 • C after it was stabilized by KPS-functionalization and acid-functionalization compared to the single-walled CNT and double-walled CNT nanofluid [23]. In a study by Hewakuruppu et al [24], a highly stable nanofluid, such as functionalized MWCNT nanofluid, had nearly identical properties as an ideal working fluid in the DASC.…”

Section: Introductionmentioning

confidence: 99%

Comparison Study on Photo-Thermal Energy Conversion Performance of Functionalized and Non-Functionalized MWCNT Nanofluid

2019

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Multiwalled carbon nanotubes (MWCNTs) have attracted attention from researchers because of their superior thermal properties and high optical absorption. In this investigation, the thermal and optical properties of functionalized and nonfunctionalized MWCNT nanofluid based on ethylene glycol/water were experimentally studied and compared. The results indicated that the use of the functionalized MWCNT nanofluid improved the thermal properties and optical absorption performance compared with the nonfunctionalized MWCNT nanofluid. The thermal conductivity enhancement of the functionalized MWCNT nanofluid was higher than that of the nonfunctionalized MWCNT nanofluid. The maximum thermal conductivity enhancement (10.15%) was observed in a functionalized MWCNT concentration of 0.01 wt% at 50 °C compared with the base fluid. In addition, the photo-thermal energy conversion efficiency of the functionalized MWCNT nanofluid was higher than that of the nonfunctionalized one owing to its higher light absorption and thermal conductivity.

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“…Presently, a lot of efforts are underway to tailor solar selective, low cost, high temperature, and long term stable nanoparticle dispersions [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. In this direction, we propose that 'used engine oil' (owing to the presence of carbon soot particles) could be employed to synthesize broad wavelength absorption nanoparticle dispersions (volumetrically absorbing solar selective heat transfer fluid).…”

Section: Introductionmentioning

confidence: 99%

Efficient Volumetric Absorption Solar Thermal Platforms Employing Thermally Stable - Solar Selective Nanofluids Engineered from Used Engine Oil

Singh

Khullar

2019

Sci Rep

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We report a low cost and scalable method to synthesize solar selective nanofluids from ‘used engine oil’. The as-prepared nanofluids exhibit excellent long-term stability (presently tested up to 6 months under undisturbed stagnant conditions at room temperature) and photo-thermal conversion efficiency. Moreover, these were found to retain their stability and functional characteristics even after extended periods (72 hours) of high temperature (300°C) heating, ultra violet light exposure and thermal cyclic loading. Building upon it, we have been able to successfully engineer an efficient volumetric absorption solar thermal platform that employs the as-prepared nanofluids and achieves higher steady state temperatures (approximately 5% higher) relative to the conventional surface absorption based solar thermal system under the sun. The developed volumetric absorption solar thermal platform could prove to be significant step in the evolution of efficient solar thermal systems which could potentially be deployed for host of applications ranging from solar driven heating, air-conditioning, and desalination units to solar energy electricity generation systems.

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An investigation of thermal stability of carbon nanofluids for solar thermal applications

Cited by 72 publications

References 56 publications

Nanomaterials and nanofluids – new materials for building integrated solar thermal systems

Nanomaterials and nanofluids – new materials for building integrated solar thermal systems

Comparison Study on Photo-Thermal Energy Conversion Performance of Functionalized and Non-Functionalized MWCNT Nanofluid

Efficient Volumetric Absorption Solar Thermal Platforms Employing Thermally Stable - Solar Selective Nanofluids Engineered from Used Engine Oil

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