Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

Louis, Stephan Pierre; Ushak, Svetlana; Milián, Yanio E.; Nemś, Magdalena; Nemś, Artur

doi:10.3390/ma15196879

Cited by 9 publications

(4 citation statements)

References 68 publications

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“…The cooler fluid extracts heat from the hotter fluid as they flow alongside or cross each other. Different correlations are employed to calculate the Nusselt number and the heat transfer coefficient [9,10]. Bahmani h et al [1] investigated the Nu and f for water/alumina nanofluid in a DTHx.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of Thermo-Hydraulic Performance using Water-Based Alumina Nanofluids: A Numerical Investigation

Raj,

Kumar,

Hussein

et al. 2024

E3S Web of Conf.

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This study investigates the heat transfer and fluid flow characteristics of pure water passing through a double tube heat exchanger (DTHX). Computational fluid dynamics (CFD) simulations were conducted using ANSYS-FLUENT 22 R1 software. Mathematical models and thermophysical properties of nanofluids and water from existing literature were employed. The comparison focused on pure water and 1% Al2O3/H2O nanofluids. Various operating variables such as Reynolds number and temperature were considered across the inner and outer tubes. The Reynolds number ranged from 2500 to 5500 at 80°C for the inner tube and 2500 at 15°C for the outer tube. Key findings include a 7.69% increase in friction factor for 1% Al2O3/H2O compared to pure water and a 16% increase compared to the Gnielinski correlation at a Reynolds number of 2500. The Nusselt number (Nu) exhibited a 98.42% increase compared to the Gnielinski correlation at a Reynolds number of 5500 and a 39% increase compared to pure water at the same Reynolds number. Heat transfer coefficients (hi) were found to increase by 9.52% compared to pure water and 12% compared to the correlation in existing literature.

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Section: Introductionmentioning

confidence: 99%

“…Additionally, potential drawbacks associated with nanoparticles, such as agglomeration and settling are relatively small when compared to larger particles. Basavapoornima C et al [9] The work investigates Pr 3+: PPbKANPr glasses for visible lasers and optical amplifiers. Glasses were made using the melt-cast method.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Thermo-Hydraulic Performance using Water-Based Alumina Nanofluids: A Numerical Investigation

Raj,

Kumar,

Hussein

et al. 2024

E3S Web of Conf.

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“…Constant thermophysical characteristics lead to improved thermal efficiency, while variable characteristics result in higher average Nusselt number. Chun et al [6,7] explored that Nu of alumina nanoparticle-based nanofluids mixed with transformer oil in a laminar flow regime within a DTHX system. Han D et al [8] investigated the effect of Alumina nf on Nu enhancement in a DTHX at varying inlet temperatures.…”

Section: Introductionmentioning

confidence: 99%

Improving Thermo-Hydraulic Performance with Varying Concentrations of Alumina Nanofluids: A Numerical Investigation

Rajitha,

Habelalmateen

et al. 2024

E3S Web of Conf.

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In the current study, the investigation of heat transfer and fluid flow Characteristics of Pure water when pass through a double tube heat exchanger (DTHX). This investigation has been conducted across various Reynolds Number to gain insights into their performance also conducted a computational fluid dynamics (CFD) simulation using the ANSYS-FLUENT 22 R1 software. The study employed mathematical models and thermophysical properties of nanofluids and water, which were sourced from existing literature. The analysis focused on comparing pure water, 1% Al2O3/H2O nanofluids. The investigation considered various operating variable as Reynolds Number and temperature across the inner, and outer tubes. Specifically, the Reynolds Number of a range of 2500 to 5500 at 80°C, and 2500 at 15°C for the respective tubes. Key findings are that friction factor for pure water, 1% alumina nf, 2% alumina nf, and 3% alumina nf is increased by 4.61%,11.42%,15.06% and 16.21% as compared to Gnielinski correlation in existing literature at a Reynolds Number of 2500 and this increase in friction factor is 5.66%, 13.79%, 18.03% and 19.61% respectively at Reynolds number of 5500. Nusselt number (Nu) for pure water, 1% alumina nf, 2% alumina nf, and 3% alumina nf is increased by 24.92%, 50.04%, 59.90% and 64.31% as compared to Gnielinski correlation in existing literature at a Reynolds Number of 2500 and this increase is 10.84%, 28.68%, 35.31% and 41.55% respectively at Reynolds number of 5500. The heat transfer coefficients (hi) for pure water, 1% alumina nf, 2% alumina nf, and 3% alumina nf is increased by 3.17%, 7.29%, 8.49% and 8.94% as compared to Gnielinski correlation in existing literature at a Reynolds Number of 2500 and this increase is 8.04%, 18.49%, 21.54% and 22.64% respectively at Reynolds number of 5500.

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“…Muneeshwaran et al, introduced an alternative solution to this problem by improving the thermal properties of fluids in the heat exchanger system and no doubt conducted due to its simple, low cost, and easy preparation (Muneeshwaran et al, 2021). Then, in 2022, Louis et al stated that nanofluids are the best fluids for improving the heat exchanger (Louis et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

The Qualitative Stability and Thermal Properties Investigation of TiO2-EG/W Nanofluids Through Experimental Validation

Muhamad Taufik Ulhakim,

Sukarman,

Khoirudin

et al. 2024

ASIIMETRIK

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Over the past two decades, researchers have been extremely interested in developing TiO2 nanofluids for heat exchanger applications. Therefore, this study evaluates the performance of employing TiO2 nanofluids, which were prepared using ethylene glycol (EG) and distilled water as the base fluid, then called TiO2-EG/W. The qualitative stability and thermal conductivity properties were measured through the experimental investigation. XRD and SEM analyses were also carried out to investigate the structures of TiO2 nanoparticles used in terms of their crystalline and morphological structures. The results showed a positive impact of stability even for 15 days, and after that, the nanoparticles dropped to the sedimentation by about 58%. Then, the highest thermal conductivity at the temperature of 80 °C was increased by about 17.08% compared to the base fluid. Supported by the results of XRD and SEM analysis, respectively, highlight that TiO2 nanoparticles have a rutile phase with an average crystallite size of 20.23 nm and are small spherical in morphology. This paper also provided the challenge and future perspective of TiO2 nanofluid to appear as an innovation for the development of TiO2 nanofluid in the further studies of heat exchanger applications.

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Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

Cited by 9 publications

References 68 publications

Enhancement of Thermo-Hydraulic Performance using Water-Based Alumina Nanofluids: A Numerical Investigation

Enhancement of Thermo-Hydraulic Performance using Water-Based Alumina Nanofluids: A Numerical Investigation

Improving Thermo-Hydraulic Performance with Varying Concentrations of Alumina Nanofluids: A Numerical Investigation

The Qualitative Stability and Thermal Properties Investigation of TiO2-EG/W Nanofluids Through Experimental Validation

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