Thermal Stability and Conductivity of Carbon Nanotube Nanofluid using Xanthan Gum as Surfactant

Rashidi, Saba; Rashmi, W.; Abdullah, Luqman Chuah; Fakhru’l‐Razi, A.; Faizah, Mamluatul

doi:10.17576/jsm-2017-4607-02

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…The findings of Iyahraja and Rajadurai 55 demonstrate how the decrease in particle diameter and increase in nanoparticle concentration can improve the overall thermal conductivity and thermal conductivity ratio. However, it is important to note other reported findings such that of Rashidi et al 56 who found the CNT‐water nanofluid with a concentration of 0.1 wt% to be around 0.618 W/m k, at 25°C. The CNT used by Rashidi et al 56 had an average outer diameter of 20 to 30 nm.…”

Section: Resultsmentioning

confidence: 77%

“…However, it is important to note other reported findings such that of Rashidi et al 56 who found the CNT‐water nanofluid with a concentration of 0.1 wt% to be around 0.618 W/m k, at 25°C. The CNT used by Rashidi et al 56 had an average outer diameter of 20 to 30 nm. Said et al 46 observed 62% enhancement in thermal conductivity of SWCNT‐water nanofluid compared to water when using a volume fraction of 0.5% and at a temperature of 60°C.…”

Section: Resultsmentioning

confidence: 77%

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Investigation of a nanofluid‐based photovoltaic thermal system usingsingle‐wallcarbon nanotubes: An experimental study

et al. 2021

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Summary The temperature of photovoltaic cell is reduced by heat transfer fluids (HTF) in cooling channels, which are attached to the back of the photovoltaic module in a hybrid thermal photovoltaic system (PV/T). Recently, nanofluids have been implemented as HTF's in PV/T systems. Various types of nanofluids have been synthesized, prepared, and tested, however, not a specific type in particular. In this paper, experiments were carried out using Single‐walled carbon nanotubes (SWCNTs) nanofluids. The proposed nanofluid consisted of a primary fluid that is water with a volume ratio of 75.0% and glycol Ethylene with a volume ratio of 25% and a surfactant, Cetyltrimethylammonium Bromide(CTAB), in an amount of 0.5 mL. Single‐walled carbon nanotubes (SWCNTs) were added in four weight ratios of 0.1%, 0.5%, 1.0%, and 2.0%. The samples were examined and compared based on their thermophysical properties, and from these properties, a volume fraction of 0.5% SWCNT was chosen to form the nanofluid. In this study, the performance characteristics of the PV/T were investigated. The results of the study showed that the proposed nanofluid caused an increase in the electrical power generated by 11.7% while the electrical efficiency of PV/T was increased up to 25.2% compared to the PV system. It is found that the cell temperature reduced by 18% on average for a whole day operation. The studied PV/T system produced an impressive overall efficiency of 71% compared to the PV system, which generated no more than 11%. SWCNTs have shown superior results in improving the performance of the studied PV/T system compared to other types of nanofluids used in PV/T systems in the literature.

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Section: Resultsmentioning

confidence: 77%