Experimental investigation of heat transfer coefficient with Al2O3 nanofluid in small diameter tubes

Kim, Sedong; Tserengombo, Baasandulam; Choi, Soon-Ho; Noh, Jungpil; Huh, Sun-Chul; Choi, Byeong-Keun; Chung, Hanshik; Kim, Junhyo; Jeong, Hyomin

doi:10.1016/j.applthermaleng.2018.10.001

Cited by 51 publications

(12 citation statements)

References 38 publications

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“…Amin Shahsavar et al (8) experimentally depicted that, nanoparticle shapes, platelet-shaped gave good heat transfer characteristics and in performance index of the heat exchanger spherical nanoparticle containing nanofluid is higher. Sedong Kim et al (9) stated that as the heat transfer coefficient, Reynolds number and concentration was increased with the decrease in the tube diameter. M. M. Elias et al (5) showed that in a plate heat exchanger, the 60° chevron angle showed better performance in comparison with 30° chevron angle with heat transfer coefficient, the overall heat transfer coefficient and the heat transfer rate 15.14%, 7.8%, and 15.4%, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Stability of the nanoparticle depends on the volume fraction, shape, size and thermo-physical properties of the nanoparticle and the base fluid. Sedong Kim et al (9) discussed that after Ultrasonic excitation over three different concentrated nanofluids created effective dispersion of nanoparticles in a base fluid compared to the untreated nanofluid which was kept for 7 days. Mohsen Motevasel et al (13) had used magnetic stirrer, ultrasonicator (UIP500, Hielsher Co.) and Zeta potential (Malvern, ZEN 3600) to measure the stability of the nanofluid which shows no sedimentation for 2 days and the Zeta potential value was more than 30 mV which denoted the nanofluid was stable.…”

Section: Stability Rheological and Agglomeration Propertiesmentioning

confidence: 99%

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A Recent Examination on the Performance of Heat Exchangers using Al2O3 Nanofluid with Its Thermo Physical Properties

Armstrong¹,

Sivasubramanian²,

Selvapalam³

2019

IJEAT

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Heat exchangers are the most significant equipment used in the industrial sites for exchanging the useful energy for many applications. It may be used either for cooling or heating but in the industrial scenario, it mostly used for cooling. In the current research development, the nanoparticles of different high thermal conductivity metals have been prepared and introduced in the low thermal performance base fluids like water, oil, ethylene glycol to enhance its quality of heat absorption in the heat exchangers. In that alumina nanoparticle played a significant role in many research applications and it has good thermal conductivity as a pure fluid. So, in this review work, the recent study of Al2O3 nanofluid with its preparation method, thermo-physical properties and its performance in varied heat exchangers have been discussed. This would enrich the knowledge and help the researchers who are interested in alumina nanofluid for their experimental works.

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Section: Resultsmentioning

confidence: 99%

Section: Stability Rheological and Agglomeration Propertiesmentioning

confidence: 99%

A Recent Examination on the Performance of Heat Exchangers using Al2O3 Nanofluid with Its Thermo Physical Properties

Armstrong¹,

Sivasubramanian²,

Selvapalam³

2019

IJEAT

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“…According to the physics of nanofluids, thermal conductivity is mainly affected by the particles-particles collision due to Brownian motion. In the higher concentrations, more interactions between higher and lower temperature particles are happen, which result to the additional heat diffusion [44].…”

Section: Characterization Of Mmtnfsmentioning

confidence: 99%

Assessment of the colloidal montmorillonite dispersion as a low-cost and eco-friendly nanofluid for improving thermal performance of plate heat exchanger

Hosseini

Mirzaei

2020

SN Appl. Sci.

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Synthetic nanofluids are produced by expensive and complex procedures which hinders their large-scale application in thermal systems. In this study the montmorillonite clay as a natural nanostructure material with a high dispersion ability has been introduced for achieving low cost and eco-friendly water-based green nanofluid. For this purpose, a set of montmorillonite nanofluids (MMTNFs) with different weight fractions of 0.2, 0.4, 0.6, 0.8, and 1% was mechanically prepared. The concentration-dependent properties of the samples including stability, thermal conductivity and viscosity were experimentally evaluated. The results indicated that MMTNFs were accompanied by a primary instability, but they gradually possessed excellent long-term stability. Adding montmorillonite to the water could enhance thermal conductivity up to 8.3%, which is worth with considering the naturalness, abundance and low-cost of this clay. MMT-NFs exhibited excellent thermal performance when utilized as a working fluid instead of the pure water in a plate heat exchanger (PHE). The results showed that the best performance of PHE was obtained at an optimum MMT concentration (0.6 wt%). At optimal condition, the overall heat transfer coefficient, heat transfer rate, and thermal efficiency improved 27.25%, 17.65%, and 7.82%, respectively.

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“…Nanofluids are engineered colloidal suspensions of nanoparticles < 100 nm in a base fluid, which have recently been proposed as new generation of heat transfer fluids. Various nanoparticles have been selected to produce nanofluids, including metals [1,2], metal oxides [3,4] and nonmetals [5,6]. These suspensions exhibit noticeably higher thermal conductivity than the pure liquid [7] which could improve heat transfer in heat exchangers [8,9] since low thermal conductivity of the process fluids like water, ethylene glycol and industrial oils [1,2,10,11] prevents high effectiveness of heat exchangers through making their heat transfer capability limited.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer of water-based carbon nanotube nanofluids in the shell and tube cooling heat exchangers of the gasoline product of the residue fluid catalytic cracking unit

Hosseini

Safaei

Estellé

et al. 2019

J Therm Anal Calorim

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In this study, a series of low concentration carbon nanotubes (CNT) water-based nanofluids (0.0055, 0.055, 0.111 and 0.278 vol%) were used as coolants in a shell and tube cooler of the Residue Fluid Catalytic Cracking (RFCC) gasoline product to analyze their effects on heat performance of the heat exchanger. The coolants and gasoline flow in tube side and shell side, respectively. This work was performed through simulating the heat exchanger by ASPEN HTFS+ 7.3 software. The performance of the nanofluids to heat transfer was analyzed in comparison with cooling water. Results illustrated that 0.055% CNT concentration could enhance heat transfer properties of the heat exchanger such as Nusselt number, total heat transfer coefficient and heat transfer rate more than other concentrations.Therefore, the lowest temperature of outlet shell side fluid was also observed at this concentration.Moreover, increment of mass flow rates of both the tube side and shell side fluids caused enhancement of the heat transfer, especially with 0.055 vol% CNT. Although there is an optimum concentration among the studied CNT volume fractions, all nanofluids exhibit better thermal performance of the heat exchanger than cooling water, whereas pressure drop increases with CNT loading.

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Experimental investigation of heat transfer coefficient with Al2O3 nanofluid in small diameter tubes

Cited by 51 publications

References 38 publications

A Recent Examination on the Performance of Heat Exchangers using Al2O3 Nanofluid with Its Thermo Physical Properties

A Recent Examination on the Performance of Heat Exchangers using Al2O3 Nanofluid with Its Thermo Physical Properties

Assessment of the colloidal montmorillonite dispersion as a low-cost and eco-friendly nanofluid for improving thermal performance of plate heat exchanger

Heat transfer of water-based carbon nanotube nanofluids in the shell and tube cooling heat exchangers of the gasoline product of the residue fluid catalytic cracking unit

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