Experimental study on the thermal conductivity of ethylene glycol-based nanofluid containing Gr-CNT hybrid material

Trinh, Pham Van; Anh, Nguyen Ngoc; Hong, Nguyen Tuan; Hong, Phan Ngoc; Minh, Phan Ngoc; Thắng, Bùi Hùng

doi:10.1016/j.molliq.2018.08.071

Cited by 58 publications

(12 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 Journal of Nanomaterials band (G), respectively. As can be seen, the broadening of the G band of MWCNT-OH indicates a reduction in the resonance-induced vibration extinction time [23]. This could imply an increase in structural defects and/or a shortening of the CNT after the hydroxyl functionalization process.…”

Section: Resultsmentioning

confidence: 87%

Thermal Conductivity and Photothermal Conversion Performance of Ethylene Glycol-Based Nanofluids Containing Multiwalled Carbon Nanotubes

Tam

Trinh

Anh

et al. 2018

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

In this study, the successful hydroxyl functionalization of carbon nanotubes (MWCNT-OH) was prepared by chemical treatments and characterized by Raman and FTIR spectra. MWCNT-OH was successfully dispersed into ethylene glycol (EG) with the Tween-80 surfactant by an ultrasonication method to prepare nanofluids. Thermal conductivity of nanofluid was investigated, and a maximum thermal conductivity enhancement about 24% at 50°C was obtained with nanofluid containing 0.64 vol.% MWCNT concentration. The photothermal conversion performance of nanofluid was also investigated by measuring the change of the temperature under lighting from a solar simulator. The measurement results showed that the highest photothermal conversion was obtained about 4.2% after a 30 min lighting with nanofluid containing 0.48 vol.% CNT concentration compared to ethylene glycol. These obtained results have propose a potential application of CNTs in nanofluids for solar absorption.

show abstract

Section: Resultsmentioning

confidence: 87%

Thermal Conductivity and Photothermal Conversion Performance of Ethylene Glycol-Based Nanofluids Containing Multiwalled Carbon Nanotubes

Tam

Trinh

Anh

et al. 2018

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Using a particular best combination of the nanoparticles, one can increase the k and others can reduce the viscosity compared to the nanofluids containing single nanoparticle. Some such hybrid nanofluids are found in the literature although there is still concern about the stability and enhancement in the P Pump of the hybrid nanofluids. The prime motive should be to find the cost‐to‐benefit feasible nanofluids based PV modules in different operating conditions to commercialize the cooling method in the SE industry.…”

Section: Discussionmentioning

confidence: 99%

Performance enhancement of photovoltaic modules by nanofluid cooling: A comprehensive review

2020

View full text Add to dashboard Cite

Summary Only 15‐20% of solar radiation incident on the photovoltaic (PV) cells is utilized which further reduces due to the rise in the temperature of the PV module and it also degrades the lifespan of the PV module. Therefore, numerous attempts were made to reduce this rising temperature of the PV module and different cooling techniques were employed. Nanofluid cooling is one of the potential cooling techniques for lowering the temperature of the PV module and augmenting the heat transfer by increasing the thermal conductivity of the nanofluid relative to the base fluid (BF). The experimental and numerical studies related to the cooling of PV cells with nanofluids have been reviewed. It was found that the heat transfer from the back of the PV module is enhanced with the augmentation in the concentration of nanoparticle in BF; however, some studies also demonstrate that the enhancement in the heat transfer also depends upon other factors such as the geometry at the rear of the PV module, nanoparticle material, nanoparticle size, BF, ambient conditions, etc. This review article also demonstrates the various issues with nanofluids such as instability, technological difficulties, high system costs, and the impossibility of finding a viable operational design which creates a barrier in the commercialization of the nanofluid cooling technique for PV modules.

show abstract

“…Due to the high thermal properties, researchers have utilized carbon nanomaterials as nanoparticles in preparing nanofluids. Many results of the thermal conductivity enhancement of nanofluids containing carbon nanomaterials have been previously reported [ 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 , 131 , 132 , 133 , 134 , 135 , 136 , 137 , 138 , 139 , 140 , 141 , 142 , 143 , 144 ]. In this work, we review remarkable studies and provide summaries for two main types of carbon nanomaterials namely graphene and CNTs.…”

Section: Properties Of Carbon-based Nanofluidsmentioning

confidence: 99%

“…Experiments were conducted at various temperatures from 293.15 K to 323.15 K. They found that thermal conductivity was considerably boosted when the PG concentration increased, from 4.7% enhancement with 0.25 wt% PG up to 16% enhancement for 1.0 wt%. Trinh et al [ 116 ] used Gr-GNT hybrid materials for preparing nanofluids and found that the thermal conductivity increases up to 49% compared to based nanofluids and nanofluid containing Gr or CNTs ( Figure 6 ). A general comparison about the thermal conductivity of other nanofluids containing graphene is given in the Table 3 .…”

Section: Properties Of Carbon-based Nanofluidsmentioning

confidence: 99%

“… ( a ) Schematic view of the preparation process of Gr-CNT hybrid material; ( b ) optical images of nanofluids; ( c ) transmission electron microscopy (TEM) image Gr-CNT hybrid material; ( d ) thermal conductivity and ( e ) thermal conductivity enhancements of nanofluids containing carbon nanomaterials [ 116 ] (Reproduced with permission from Elsevier). …”

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

Carbon Nanomaterial-Based Nanofluids for Direct Thermal Solar Absorption

et al. 2020

Self Cite

View full text Add to dashboard Cite

Recently, many scientists have been making remarkable efforts to enhance the efficiency of direct solar thermal absorption collectors that depends on working fluids. There are a number of heat transfer fluids being investigated and developed. Among these fluids, carbon nanomaterial-based nanofluids have become the candidates with the most potential by the heat absorbing and transfer properties of the carbon nanomaterials. This paper provides an overview of the current achievements in preparing and exploiting carbon nanomaterial-based nanofluids to direct thermal solar absorption. In addition, a brief discussion of challenges and recommendations for future work is presented.

show abstract

Experimental study on the thermal conductivity of ethylene glycol-based nanofluid containing Gr-CNT hybrid material

Cited by 58 publications

References 77 publications

Thermal Conductivity and Photothermal Conversion Performance of Ethylene Glycol-Based Nanofluids Containing Multiwalled Carbon Nanotubes

Thermal Conductivity and Photothermal Conversion Performance of Ethylene Glycol-Based Nanofluids Containing Multiwalled Carbon Nanotubes

Performance enhancement of photovoltaic modules by nanofluid cooling: A comprehensive review

Carbon Nanomaterial-Based Nanofluids for Direct Thermal Solar Absorption

Contact Info

Product

Resources

About