Investigation of thermal conductivity of multi walled carbon nanotube dispersed in hydrogenated oil based drilling fluids

Chai, Yee Ho; Yusup, Suzana; Chok, Vui Soon; Arpin, Mohamad Taufiq; Irawan, Sonny

doi:10.1016/j.applthermaleng.2016.07.017

Cited by 33 publications

(26 citation statements)

References 30 publications

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“…Both figures show that there is a parallel tendency for concentrations and temperature. Additionally, the tendency of both graphs is almost similar to that in previous studies on the thermal conductivity of nanofluid [37][38][39][40][41][42][43][44]. The temperature effect on the improvement of thermal conductivity in nanofluid is mainly caused by the increase in the intensity of Brownian motion that is the result of augmentation of interactions and movement between nanoparticles.…”

Section: Thermal Conductivity Characteristics Of Mwcnt Nanofluidsupporting

confidence: 83%

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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Section: Thermal Conductivity Characteristics Of Mwcnt Nanofluidsupporting

confidence: 83%

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

2019

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“…It was suggested that the non-linear trend was a result of the unpredictable size and shape of the nanotubes due to their tendency toward agglomeration as a result of their high aspect ratio. Also, using a KD2 Pro Thermal Properties Analyzer, Chai et al [56] measured the thermal conductivity of MWCNTs dispersed in hydrogenated oil-based drilling fluid. It was observed that the thermal conductivity enhancement was greater at higher nanoparticle concentrations than at lower concentrations.…”

Section: Effects Of Carbon Nanotubes On Nanofluid Thermal Conductivitymentioning

confidence: 99%

Nanofluid Thermal Conductivity and Effective Parameters

et al. 2018

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Due to the more powerful and miniaturized nature of modern devices, conventional heat-transfer working fluids are not capable of meeting the cooling needs of these systems. Therefore, it is necessary to improve the heat-transfer abilities of commonly used cooling fluids. Recently, nanoparticles with different characteristics have been introduced to base liquids to enhance the overall thermal conductivity. This paper studies the influence of various parameters, including base liquid, temperature, nanoparticle concentration, nanoparticle size, nanoparticle shape, nanoparticle material, and the addition of surfactant, on nanofluid thermal conductivity. The mechanisms of thermal conductivity enhancement by different parameters are discussed. The impact of nanoparticles on the enhanced thermal conductivity of nanofluids is clearly shown through plotting the thermal conductivities of nanofluids as a function of temperature and/or nanoparticle concentration on the same graphs as their respective base liquids. Additionally, the thermal conductivity of hybrid nanofluids, and the effects of the addition of carbon nanotubes on nanofluid thermal conductivity, are studied. Finally, modeling of nanofluid thermal conductivity is briefly reviewed.

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“…The findings of this study are compared against our previous experimental work [46,47] where graphene nanosheet and carbon nanotubes nanoparticles were selected. From Figure 7, graphene nanosheets have higher thermal conductivity as compared to carbon nanotube and graphene oxide by a slight margin at 50°C and 100 ppm.…”

Section: Thermal Conductivity Analysismentioning

confidence: 98%

Bio-Based Oil Drilling Fluid Improvements through Carbon- Based Nanoparticle Additives

Chai¹,

Yusup²,

Chok³

et al. 2018

Drilling

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Performance issues of vegetable oil or bio-based oil drilling fluids are generally inferior as compared to synthetic based drilling fluids. This chapter focuses largely on thermal conductivity and rheological properties of bio-based oil drilling fluid as its core issues. Unstable drilling fluids do not only incur in downtime for maintenance, but it indirectly affects production capacity as well. To overcome these issues, nanoparticles acts as additives to improve the thermo-physical traits of bio-based oil drilling fluid. The scope of this chapter focuses on dispersion of graphene oxide at very low concentration, namely 25, 50 and 100 ppm, to improve the thermal conductivity and rheological properties of bio-based oil drilling fluid. The data obtained from thermal conductivity and rheological experimental works were validated with various thermal conductivity and rheological models.

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Investigation of thermal conductivity of multi walled carbon nanotube dispersed in hydrogenated oil based drilling fluids

Cited by 33 publications

References 30 publications

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

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

Nanofluid Thermal Conductivity and Effective Parameters

Bio-Based Oil Drilling Fluid Improvements through Carbon- Based Nanoparticle Additives

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