An experimental study on MWCNT–water nanofluids flow and heat transfer in double-pipe heat exchanger using porous media

Moradi, A.; Toghraie, Davood; Isfahani, Amir Homayoon Meghdadi; Hosseinian, Ali

doi:10.1007/s10973-019-08076-0

Cited by 135 publications

(25 citation statements)

References 45 publications

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“…The performance of TiO 2 -water nanofluid was experimentally investigated in a double-tube HX; the study observed that the heat transfer rate was improved by 14.8%; however, the pressure drop also increases by 51.9% [261]. The heat transfer coefficient in the double-tube HX was improved by 35% using MWCNT-water nanofluids [262]. The Al 2 O 3 /water nanofluid was also used in a double-tube HX, and the result demonstrated a more favourable thermal efficiency of 16% compared to pure water [263].…”

Section: Double-tube Heat Exchangermentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

256

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The field of nanofluids has received interesting attention since the concept of dispersing nanoscaled particles into a fluid was first introduced in the later part of the twentieth century. This is evident from the increased number of studies related to nanofluids published annually. The increasing attention on nanofluids is primarily due to their enhanced thermophysical properties and their ability to be incorporated into a wide range of thermal applications ranging from enhancing the effectiveness of heat exchangers used in industries to solar energy harvesting for renewable energy production. Owing to the increasing number of studies relating to nanofluids, there is a need for a holistic review of the progress and steps taken in 2019 concerning their application in heat transfer devices. This review takes a retrospective look at the year 2019 by reviewing the progress made in the area of nanofluids preparation and the applications of nanofluids in various heat transfer devices such as solar collectors, heat exchangers, refrigeration systems, radiators, thermal storage systems and electronic cooling. This review aims to update readers on recent progress while also highlighting the challenges and future of nanofluids as the next-generation heat transfer fluids. Finally, a conclusion on the merits and demerits of nanofluids is presented along with recommendations for future studies that would mobilise the rapid commercialisation of nanofluids.

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Section: Double-tube Heat Exchangermentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

256

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“…To predict the thermal conductivity of MWCNT‐TiO 2 /Water‐ethylene glycol hybrid nanofluid, the development of dissimilar neural networks (ANNs) was proposed by Akhgar et al 25 The results indicate that ANN outputs can better predict the empirical results than the formula of correlation. Moradi et al 26 simulated heat transfer in a double‐pipe heat exchanger using porous media. Numerical results show the imposing the plate porous media increases the heat transfer coefficient significantly.…”

Section: Introductionmentioning

confidence: 99%

MHD heat transfer and entropy production of an Al₂O₃‐water nanofluid in a horizontal cylinder

Belahmadi

Bessaïh

2021

Heat Trans

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This paper deals with the effect of magnetic fields (Br, Bθ, Bz) applied in r‐, θ‐, z‐directions, respectively, on entropy production and heat transfer and in a horizontal cylinder filled with an Al2O3‐water nanofluid. The results are verified using literature data. For different Richardson, Ri, and Hartmann numbers, Ha, the nanoparticles (NP) ϕ, and magnetic field orientation combined effect provide a better understanding of heat transfer and entropy optimization. The results indicate that entropy production and heat transfer and rates depend on magnetic field intensity and direction. Also, increasing Ri and NP increases entropy generation and heat transfer. Finally, applying a radial magnetic field promotes a better convective heat transfer and minimizes entropy production.

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“…Numerical models for estimating and modeling the heat dissipation have also been used to analyze nanofluids used in microchannels [21], while other models utilize the thermodynamic properties to predict the structure of materials [22,23]. Heat exchangers and other thermodynamic components have recently been constructed using NP-containing materials in order to analyze the heat transfer properties of the materials and components [24]. These steady-state heat dissipation studies have advanced understanding of thermal responses of plasmonically active nanocomposite materials.…”

Section: Introductionmentioning

confidence: 99%

Initial dynamic thermal dissipation modes enhance heat dissipation in gold nanoparticle–polydimethylsiloxane thin films

Howard

Berry

Roper

2020

J Therm Anal Calorim

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Plasmonic nanocomposite materials have exhibited value for applications ranging from biological hyperthermia to optical sensing and waveguiding. Energy absorbed from incident irradiation can be re-emitted as light or decay into phonons that propagate through the surrounding material and increase its temperature. Previous works have examined steady-state thermal dissipation resulting from irradiated plasmonic nanocomposites. This work shows heat dissipation in the first few seconds can significantly exceed that during subsequent steady state, depending on film geometry, nanoparticle diameter and concentration, laser irradiation power, and position within and adjacent to the irradiated spot. Films of lower thickness containing 16 nm gold nanoparticles (AuNPs) irradiated at 13.5 mW laser power showed highest enhancement and tunability of the dynamic thermal mode within and adjacent to the irradiated spot. Measured initial nanocomposite film temperature in or near the irradiated spot exceeded that resulting from constant bulk film thermal dissipation. These results improve understanding of cooling dynamics of resonantly irradiated nanocomposite materials and guide development of devices with enhanced thermal dissipation dynamics.

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An experimental study on MWCNT–water nanofluids flow and heat transfer in double-pipe heat exchanger using porous media

Cited by 135 publications

References 45 publications

An updated review of nanofluids in various heat transfer devices

An updated review of nanofluids in various heat transfer devices

MHD heat transfer and entropy production of an Al₂O₃‐water nanofluid in a horizontal cylinder

Initial dynamic thermal dissipation modes enhance heat dissipation in gold nanoparticle–polydimethylsiloxane thin films

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An experimental study on MWCNT–water nanofluids flow and heat transfer in double-pipe heat exchanger using porous media

Cited by 135 publications

References 45 publications

An updated review of nanofluids in various heat transfer devices

An updated review of nanofluids in various heat transfer devices

MHD heat transfer and entropy production of an Al2O3‐water nanofluid in a horizontal cylinder

Initial dynamic thermal dissipation modes enhance heat dissipation in gold nanoparticle–polydimethylsiloxane thin films

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MHD heat transfer and entropy production of an Al₂O₃‐water nanofluid in a horizontal cylinder