Experimental study of heat transfer enhancement and pressure drop using TiO2/distilled water nanofluid inside counter flow double tube heat exchanger

Rifa’i, Ahmad Imam; Hasan, Muhammad Faisal; Kristiawan, Budi; Wijayanta, Agung Tri; Miyazaki, Takahiko; Thu, Kyaw; Enoki, Koji

doi:10.1063/1.5098218

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…The results showed that nanoparticles significantly improved the heat transfer rate at the laminar and turbulent flows. Rifa'i et al [276] studied the heat transfer process of water/TiO 2 flow in a counter-flow doubletube heat exchanger. The results displayed that the heat transfer rate of the nanofluid is higher than the base fluid for the same mass flow rate and inlet temperature.…”

Section: Mono Nanofluidmentioning

confidence: 99%

A Review of Recent Passive Heat Transfer Enhancement Methods

et al. 2022

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Improvements in miniaturization and boosting the thermal performance of energy conservation systems call for innovative techniques to enhance heat transfer. Heat transfer enhancement methods have attracted a great deal of attention in the industrial sector due to their ability to provide energy savings, encourage the proper use of energy sources, and increase the economic efficiency of thermal systems. These methods are categorized into active, passive, and compound techniques. This article reviews recent passive heat transfer enhancement techniques, since they are reliable, cost-effective, and they do not require any extra power to promote the energy conversion systems’ thermal efficiency when compared to the active methods. In the passive approaches, various components are applied to the heat transfer/working fluid flow path to improve the heat transfer rate. The passive heat transfer enhancement methods studied in this article include inserts (twisted tapes, conical strips, baffles, winglets), extended surfaces (fins), porous materials, coil/helical/spiral tubes, rough surfaces (corrugated/ribbed surfaces), and nanofluids (mono and hybrid nanofluids).

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Section: Mono Nanofluidmentioning

confidence: 99%

A Review of Recent Passive Heat Transfer Enhancement Methods

et al. 2022

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Investigation of vibrational manner of carbon nanotubes in the vicinity of ultrasonic argon flow using molecular dynamics simulation

Karami

Eftekhari

Toghraie

2021

Sci Rep

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Among various types of nanostructures, carbon nanotube (CNT) is one of the most important nanostructures. These nanostructures have been considered due to their mechanical, thermal, and vibrational properties. In this research, this nanostructure’s vibrational behavior in the vicinity of argon flow in the vicinity of ultrasonic velocity was investigated. The effect of factors such as the stability of atomic structures, the atomic manner of carbon nanotubes in the presence of ultrasonic fluid, the influence of carbon nanotubes’ length, and the chirality of carbon nanotubes on vibrational behavior was studied by molecular dynamics simulation. The MD simulations display an enhance in amplitude and a decrease in the oscillation frequency. Physically, these simulations’ results indicated the appropriate mechanical strength of carbon nanotubes in the presence of argon fluid. Numerically, the simulated carbon nanotubes’ minimum oscillation amplitude and frequency were equal to 2.02 nm and 10.14 ps−1. On the other hand, the maximum physical quantities were expressed as 4.03 nm and 13.01 ps−1.

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Experimental study of heat transfer enhancement and pressure drop using TiO2/distilled water nanofluid inside counter flow double tube heat exchanger

Cited by 2 publications

References 10 publications

A Review of Recent Passive Heat Transfer Enhancement Methods

A Review of Recent Passive Heat Transfer Enhancement Methods

Investigation of vibrational manner of carbon nanotubes in the vicinity of ultrasonic argon flow using molecular dynamics simulation

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