An experimental determination of thermal conductivity and electrical conductivity of bio glycol based Al 2 O 3 nanofluids and development of new correlation

Khdher, Abdolbaqi Mohammed; Sidik, Nor Azwadi Che; Azmi, W.H.; Mamat, Rizalman

doi:10.1016/j.icheatmasstransfer.2016.02.006

Cited by 88 publications

(40 citation statements)

References 70 publications

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“…According to Maxwell theory SiO 2 nanoparticles will decrease the electrical conductivity of the base fluids due to their insulating characteristics. This is consistent with the results of Khdher et al [4]. Figure 5 shows the variation of electrical conductivity with loadings of SiO 2 nanoparticles in EG, G, and EG/G, respectively at 30 o C. The thermal conductivity of nanofluid increased with increasing particle concentration.…”

Section: Resultssupporting

confidence: 90%

“…Nanofluids utilizing metallic oxides dispersion would exhibit high electric conductivity than pure base liquids. This is because of very well structured and larg-er electrical double layer (EDL) of high ionic conductivity, resulting from strong interactions between the ions/molecules in solution and charges on the surface of nanoparticles [4]. So far, efforts to measure the electrical conductivity of nanofluids have been relatively few.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation on Thermo-Electrical Characteristics of Sio2 Nanofluids for Fuel Cell Cooling Application in Automobiles

Akilu¹,

Baheta²,

Sharma³

2018

IJET

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Effective thermal management is critical requirement in fuel cell technologies to avoid the performance degradation during operation. Nanofluids offer the potential to address this cooling challenge in fuel cells better than pure fluids. However, due to the electrochemical changes associated with the proton exchange membrane system, a strict limit on thermal and electrical properties of coolant needs to comply. In this study, the thermal and electrical conductivities of silicon dioxide (SiO2) dispersion of ethylene glycol (EG), glycerol (G), and 40:60 by mass ethylene glycol-glycerol (EG/G) was investigated experimentally. Measurements were carried for particle volume concentrations of 0.25–2.0% at a temperature of 30 °C. The thermal and electrical conductivity of the nanofluids significantly increases with SiO2 loading. Maximum enhancements of ∼4.0% and ∼198% at a volume concentration of 2.0% were obtained with SiO2-EG/G, respectively. Further, analysis of the results reveals that SiO2/G exhibited the greatest thermo-electrical performance, followed by SiO2-EG/G and EG. Therefore, SiO2-EG/G nanofluid is best-suited coolant for PEM fuel cell thermal applications.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Evaluation on Thermo-Electrical Characteristics of Sio2 Nanofluids for Fuel Cell Cooling Application in Automobiles

Akilu¹,

Baheta²,

Sharma³

2018

IJET

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“…The second-law analysis by [5] for an EG/silica nanofluid-filled FPC showed that there would be a boosting in the exergy efficiency of the FPC. [6] measured the thermo-physical properties of BG/Al2O3 mixture and [7] studied the heat transfer behaviour of BG/TiO2 nanofluid. Both EG and PG are chemically-derived products.…”

Section: Introductionmentioning

confidence: 99%

Suitability of base liquid in a nanofluid-laden solar flat-plate collector with emphasize on bioglycol

et al. 2018

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Ethylene glycol and propylene glycol are commonly used as thermal liquids in solar flat-plate collectors (FPCs). They are utilized as base liquid as well as for improving the stability of nanofluids in FPCs. The objective of the present paper is to introduce a renewable-derived bio glycol for use as base liquid in FPCs. The effect of base ratio (BR) of different glycol products on the performance of a conventional FPC and a nanofluidladen FPC is investigated in this paper to determine its suitability. MATLAB programming was employed for modeling the performance of the FPC operating with copper and cerium oxide nanomaterials. The results show that 20:80 bio glycol/water mixture is capable of enhancing the FPC's energetic efficiency up to 72.1% which is higher than with either ethylene glycol and propylene glycol. The energy efficiency of a glycol-based nanofluid-filled FPC decreases with the base ratio of all three glycol products. Since bio glycol is a non-toxic and safe product, it can be utilized as a safe and environmentally-friend antifreeze and base liquid in nanofluid-filled FPCs.

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“…Besides rheological and thermal properties increasingly being studied are also the electrical properties of nanofluids in particular electrical conductivity. Also in this case a lot of types of nanofluids with various types of nanoparticles, different volume concentration and base fluids have been studied [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation of Electrical Conductivity of Y₃Al₅O₁₂-Ethylene Glycol Nanofluids

et al. 2017

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Paper presents results of experimental studies of electrical conductivity of yttrium aluminum garnet-ethylene glycol (Y3Al5O12-EG, YAG-EG) nanofluids, which were prepared by dispersing commercially available nanoparticles manufactured by Baikowski (Annecy, France, ID LOT: 18513) in ethylene glycol. The electrical conductivity was measured using conductivity meter MultiLine 3410 (WTW GmBH, Weilheim, Germany). In turn the temperature was stabilized in a water bath MLL 547 (AJL Electronic, Cracow, Poland). The electrical conductivity of YAG-EG nanofluids with various mass concentrations form 5% to 20% was investigated at different ambient temperatures. The experimental data indicate that changing volume fraction of YAG nanoparticles in ethylene glycol cause change of electrical conductivity of nanofluid. It was also presented that electrical conductivity depends on temperature of materials.

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An experimental determination of thermal conductivity and electrical conductivity of bio glycol based Al 2 O 3 nanofluids and development of new correlation

Cited by 88 publications

References 70 publications

Evaluation on Thermo-Electrical Characteristics of Sio2 Nanofluids for Fuel Cell Cooling Application in Automobiles

Evaluation on Thermo-Electrical Characteristics of Sio2 Nanofluids for Fuel Cell Cooling Application in Automobiles

Suitability of base liquid in a nanofluid-laden solar flat-plate collector with emphasize on bioglycol

An Experimental Investigation of Electrical Conductivity of Y₃Al₅O₁₂-Ethylene Glycol Nanofluids

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An experimental determination of thermal conductivity and electrical conductivity of bio glycol based Al 2 O 3 nanofluids and development of new correlation

Cited by 88 publications

References 70 publications

Evaluation on Thermo-Electrical Characteristics of Sio2 Nanofluids for Fuel Cell Cooling Application in Automobiles

Evaluation on Thermo-Electrical Characteristics of Sio2 Nanofluids for Fuel Cell Cooling Application in Automobiles

Suitability of base liquid in a nanofluid-laden solar flat-plate collector with emphasize on bioglycol

An Experimental Investigation of Electrical Conductivity of Y3Al5O12-Ethylene Glycol Nanofluids

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An Experimental Investigation of Electrical Conductivity of Y₃Al₅O₁₂-Ethylene Glycol Nanofluids