Thermal performance investigation of double pipe heat exchanger embedded with extended surfaces using nanofluid technique as enhancement

Hasan, Mohammed Flyyih; Danışmaz, Merdin; Majel, Bassim Mohammed

doi:10.1016/j.csite.2023.102774

Cited by 15 publications

(4 citation statements)

References 10 publications

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“…Efektifitas Concentric tube heat exchanger yang diberi vortex generator yang di teliti oleh Aridi dkk (2021) berbasis Computational Fluid Dynamics [7]. Investigasi perbedaan nilai koefisien perpindahan panas di dalam double pipe heat exchanger dengan atau tanpa sirip pernah di teliti oleh Hasan dkk (2023) [8]. Sedangkan, penelitian yang berfokus pada koefisien perpindahan panas di tiap jenis material pipa berbasis Computational Fluid Dynamics belum pernah di teliti oleh peneliti terdahulu.…”

Section: Pendahuluanunclassified

Analisis Koefisien Perpindahan Panas Alat Double Pipe Heat Exchanger Berbasis Computational Fluid Dynamics

Ivananda,

Ahmad,

Iswara

2023

Distilat: J. Tekn. Sep

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Double pipe heat exchanger merupakan salah satu jenis heat exchanger di mana proses perpindahan panas terjadi secara tidak langsung melalui dinding pembatas antara fluida panas dan dingin yang mengalir. Desain double pipe heat exchanger harus dibuat semaksimal mungkin sebelum diimplementasikan berfungsi dengan baik dan efisien. Simulasi numerik menggunakan metode CFD umum digunakan untuk mengkaji fenomena aliran fluida dalam heat exchanger. Penelitian ini bertujuan untuk menganalisis koefisien perpindahan panas pada alat double pipe heat exchanger dengan variasi material pipa dan konfigurasi aliran fluida. Analisis menggunakan software Ansys 2022 R2 versi student dengan variabel bebas berupa material pipa (stainless steel dan alumunium) dan konfigurasi aliran fluida (counter current dan parallel current) dengan fluida dingin di bagian shell dan fluida panas di bagian tube. Variabel tetap yang digunakan adalah laju alir fluida panas sebesar 0,1 kg/s, laju alir fluida dingin sebesar 0,5 kg/s, suhu inlet fluida dingin sebesar 298 K, dan suhu inlet fluida panas sebesar 350 K. Hasil analisis menunjukkan bahwa nilai koefisien perpindahan panas tertinggi terdapat pada konfigurasi parallel current dengan material pipa alumunium sebesar 41,9 W/m2K dan nilai terendah pada counter current dengan material pipa stainless steel sebesar 37,3 W/m2K.

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Section: Pendahuluanunclassified

Analisis Koefisien Perpindahan Panas Alat Double Pipe Heat Exchanger Berbasis Computational Fluid Dynamics

Ivananda,

Ahmad,

Iswara

2023

Distilat: J. Tekn. Sep

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“…Another study on Fe 3 O 4 nanofluid in an ethylene glycol/water mix (20%:80%) showed a 46% increase in thermal conductivity with 2.0 vol.% nanoparticles. 16 Hasan et al 17 enhanced heat transfer in a double pipe heat exchanger by adding an extended surface to the inner tube's outer part, using a 5% volume concentration of "Alumina nanofluid." This resulted in a 20% increase in heat transfer coefficient and a 4.7% rise in thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…Another study on Fe 3 O 4 nanofluid in an ethylene glycol/water mix (20%:80%) showed a 46% increase in thermal conductivity with 2.0 vol.% nanoparticles 16 . Hasan et al 17 enhanced heat transfer in a double pipe heat exchanger by adding an extended surface to the inner tube's outer part, using a 5% volume concentration of “Alumina nanofluid.” This resulted in a 20% increase in heat transfer coefficient and a 4.7% rise in thermal conductivity. Ajeeb et al 18 experimentally improved energy efficiency in a compact gasket plate heat exchanger using Al 2 O 3 nanofluids at various low concentrations, reaching peak efficiency at the highest particle concentration of 1.3.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance investigation of N‐shape double‐pipe heat exchanger using Al₂O₃, TiO₂, and Fe₃O₄‐based nanofluids

Salim,

Jihan,

Das

et al. 2024

Energy Science & Engineering

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Researchers and engineers are actively working on enhancing the efficiency of heat exchangers in engineering applications by developing novel designs, exploring new materials, and utilizing nanofluids. Three kinds of nanofluids with varying concentrations are investigated in this paper. The objective is to assess the performance of N‐shaped double‐pipe heat exchanger used in thermoelectric power plants. The performance has been evaluated using COMSOL Multiphysics software. The findings show that higher nanofluid concentrations resulted in elevated heat transfer coefficients and improved efficiency of N‐shape double pipe heat exchanger. The analysis revealed that a mere 1% rise in the volume fraction of nanofluids enhanced the efficiency of the heat exchanger on average 23% when compared to the base fluid (water). In comparison to the N‐shape double pipe (Inconel 625) heat exchangers, the N‐shape double pipe (copper) heat exchangers appear to be more efficient. The introduction of nanoparticles has a notable impact on the heat transfer coefficients. Specifically, within an N‐shaped double pipe (copper) heat exchanger, the inclusion of a 1% volume fraction results in a 2.09% enhancement in the heat transfer coefficient for Al2O3/water, a 1.3% improvement for Fe3O4/water, and a 1.15% increase for TiO2/water. It also exposed that adding 1% Al2O3/water led to a significant 0.623% increase in effectiveness, while TiO2/water showed a 0.259% rise, and Fe3O4/water exhibited a 0.375% improvement. Moreover, increasing the Reynolds number enhances the Nusselt number for Al2O3/water and Fe3O4/water nanofluids by 55.22%, and for TiO2/water by 54.60% at a 6% volume concentration, leading to additional increases in exchanger efficiency. Therefore, the augmentation in nanofluid concentration leads to a reduction in the temperature pinch points both at the intake and outflow. This observation suggests that nanofluids exhibit a superior ability compared to conventional fluids when it comes to effectively lowering temperatures.

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“…The advent of the double tube heat exchanger has an allowable transfer of thermal energy mainly between hot and cold fluids, mostly in concentric tubes in different configurations, which at the beginning were parallel and then changed to counterflows [1]. While many experimental and numerical investigations have been carried out [2][3][4][5], the majority of these studies concentrate on identifying the parameters that affect thermal performance, such as the operating temperature, inner and outer Reynolds numbers, volume fractions, dispersed nanoparticle shape, and thermal conductivity. The effect of nanoparticle shape has attracted the interest of many researchers, who find that the nanofluids heat transfer properties are responsive to the shape of nanoparticles [6,7].…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Heat Transfer Analysis of Double Pipe Heat Exchanger and Flow Characteristics Using Nanofluid TiO2 with Water

Alhulaifi

2024

Designs

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A device called a heat exchanger is used to exchange heat transfer between two fluids with different temperatures. Because of its durability and ability to handle high-pressure application, the concentric double pipe heat exchangers are widely utilized for numerous industrial applications. To conserve pumping power energy, many researchers were involved in study of the nanoparticles to be embedded in the fluid, which will enrich the fluid thermal conductivity and surface area. This article demonstrates the flow characteristics and convective heat transfer of nanofluids containing 0.2, 0.4 and 0.6 of vol% TiO2 nanoparticles dispersed in water under turbulent conditions, which mainly can be used for cooling nuclear reactors applications. Reynolds numbers varying from 4000 to 18,000 are examined numerically. The convective heat transfer coefficient results of the nanofluid agree well against experimental data, which are slightly more than that of base water at 1.94%. The results of the numerical model showed that the convective heat transfer coefficient of nanofluids will increase when the Reynolds and volume fraction increases. By increasing the temperature of the annular hot water, the heat transfer rate will increase, showing no major impact to the convective heat transfer coefficient of nanofluids. A generalised solution predicting the convective heat transfer coefficient for extensive nanoparticle materials is proposed. The conclusion of the empirical equation is tested among published data and the results are highly congruent, confirming the strength of the gamma equation.

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Thermal performance investigation of double pipe heat exchanger embedded with extended surfaces using nanofluid technique as enhancement

Cited by 15 publications

References 10 publications

Analisis Koefisien Perpindahan Panas Alat Double Pipe Heat Exchanger Berbasis Computational Fluid Dynamics

Analisis Koefisien Perpindahan Panas Alat Double Pipe Heat Exchanger Berbasis Computational Fluid Dynamics

Thermal performance investigation of N‐shape double‐pipe heat exchanger using Al₂O₃, TiO₂, and Fe₃O₄‐based nanofluids

Computational Fluid Dynamics Heat Transfer Analysis of Double Pipe Heat Exchanger and Flow Characteristics Using Nanofluid TiO2 with Water

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Thermal performance investigation of double pipe heat exchanger embedded with extended surfaces using nanofluid technique as enhancement

Cited by 15 publications

References 10 publications

Analisis Koefisien Perpindahan Panas Alat Double Pipe Heat Exchanger Berbasis Computational Fluid Dynamics

Analisis Koefisien Perpindahan Panas Alat Double Pipe Heat Exchanger Berbasis Computational Fluid Dynamics

Thermal performance investigation of N‐shape double‐pipe heat exchanger using Al2O3, TiO2, and Fe3O4‐based nanofluids

Computational Fluid Dynamics Heat Transfer Analysis of Double Pipe Heat Exchanger and Flow Characteristics Using Nanofluid TiO2 with Water

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Thermal performance investigation of N‐shape double‐pipe heat exchanger using Al₂O₃, TiO₂, and Fe₃O₄‐based nanofluids