Energy and Exergy Analysis of Shell and Coil Heat Exchanger Using Water Based Al<sub>2</sub>O<sub>3</sub> Nanofluid Including Diverse Coil Geometries: An Experimental Study

Elshamy, Samir M.; Abdelghany, Mohamed T.; Salem, Mohamed; Abdellatif, Osama E.

doi:10.1166/jon.2020.1727

Cited by 10 publications

(4 citation statements)

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“…Nanofluids with various particle volume concentrations (φ) can be created to investigate pressure drop and heat transfer properties. The φ of the suspended nanoparticles is defined as follows [21]:…”

Section: Introductionmentioning

confidence: 99%

Study of the thermal performance characteristics of shell and semi-circular tube heat exchanger using both baffles and nanofluid

Almulla,

Moawed,

Abd Elrahaman

et al. 2024

Engineering Research Journal (Shoubra)

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This study investigates the performance characteristics of a shell-tube heat exchanger using three techniques to improve heat transfer rate: baffles, nanofluids, and semicircular tubes (SCTs). The experiments are done using six heat exchangers of SCTs with different base spacing ratios (), alumina/water nanofluid loaded on the shell side with different nanoparticle loadings (), and single-segmental baffles mounted with cut ratio ( = 16.5%), and pitch ratio ( = 1.47). The results show that when SCTs are used instead of CCTs, the heat transfer coefficient and friction factor are greater, and they increase when the SCT spacing ratio increases. The Nu sh and 𝑓 sh of nanofluids are greater than the base fluid at the same flow condition, and they grow as φ increases. Besides, the inclusion of nanoparticles in water on the shell side has a greater influence on these increases with SCTs than CCTs. The hydrothermal performance index (HTPI) is evaluated using the Stanton number of the shell side and 𝑓 sh ratios. The maximum obtained HTPI is 3.19 for a shell-SCT heat exchanger with baffles of =16.5%, =1.47, alumina/water nanofluid concentration of φ=1.5%, and SCTs of =55.1%. Finally, correlations are provided to predict Nu sh , 𝑓 sh , and the HTPI of the tested heat exchangers.

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Section: Introductionmentioning

confidence: 99%

Study of the thermal performance characteristics of shell and semi-circular tube heat exchanger using both baffles and nanofluid

Almulla,

Moawed,

Abd Elrahaman

et al. 2024

Engineering Research Journal (Shoubra)

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“…To increase heat transfer rate with less pumping power, various methods exist, including active and passive approaches. Compound enhancement, combining active and passive approaches, increases heat transfer beyond what would be achieved with one method alone [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of baffle configuration on the thermal performance attributes of shell and semi-circular tube heat exchangers

Almulla,

Moawed,

Abd Elrahaman

et al. 2024

Engineering Research Journal (Shoubra)

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This study aims to improve the performance characteristics of a shell-tube heat exchanger in counterflow configuration. It considers the effect of using baffles and semicircular tubes as heat transfer surfaces. Twenty-nine heat exchangers are designed and constructed, consisting of tubes of circular or semicircular tubes (SCTs) with base spacing ratios ( ) ranging from 23.6% to 55.1%. The examined baffles have a pitch ratio ( ) of 1.47 to 2.36, a total cut ratio () of 16.5% to 25% and have two cutting configurations: edge cutting with a cutting ratio () of 0% to 16.5% and internal cutting baffles with a cutting ratio () of 0% to 16.5%. The experiments are done for Reynolds () and Prandtl numbers ( ). The results show that using baffles and/or SCTs increases the heat transfer rate and pressure loss, and when the SCT spacing ratio increases and baffles cut and pitch ratios decrease, these performance metrics significantly rise. However, baffles with edge cutting are better than those with internal cutting. The hydrothermal performance index is evaluated using the Stanton number of the shell side and ratios, with a maximum value of 2.54 achieved by utilizing baffles of  =  = 16.5%,  = 0, = 1.47, and SCTs of = 55.1%, and lowest shellside flow rate and inlet temperature. Finally, correlations are introduced to predict and , besides the performance index of the tested heat exchangers .

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“…Today, nanofluids are used to improve thermal performance in a wide variety of applications [1][2][3][4][5][6]. Recent research has proven that the use of nanofluids and coiled tubes concurrently may considerably increase the HTR [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the thermal-hydraulic performance of conically coiled tubes using Al2O3/water nanofluid

Abdel‐Ghany

Sharafeldin²,

Abdellatif³

et al. 2023

Journal of Engineering Research

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The thermal-hydraulic performance of conically coiled tubes (CCTs) was investigated experimentally under constant heat flux boundary conditions in this study. The effect of several factors, such as the flow Dean number, coil torsion, and varied nanoparticle weight concentrations, on the flow's heat transfer coefficient and pressure drop was studied. Thermo-hydraulic performance was studied at 0.3%, 0.6%, and 0.9% volume concentrations (ϕ) of Al2O3/water nanofluid, a Dean number (De) of 1148-2983, and coil torsions (λ) ranging from 0.02 to 0.052. Results indicated that the heat transfer rates (HTRs) of CCTs increased when the coil torsion was decreased. According to the findings, the average heat transfer coefficient (havg) rises as De increases, while friction factor (ƒ) tends to decrease. The average increase in havg is 32% at lower De values and 26% at higher De values as the nanofluid concentration increased from 0.3% to 0.9%. The thermal performance factor (TPF) improved when λ lowered from 0.052 to 0.02.

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Energy and Exergy Analysis of Shell and Coil Heat Exchanger Using Water Based Al₂O₃ Nanofluid Including Diverse Coil Geometries: An Experimental Study

Cited by 10 publications

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Study of the thermal performance characteristics of shell and semi-circular tube heat exchanger using both baffles and nanofluid

Study of the thermal performance characteristics of shell and semi-circular tube heat exchanger using both baffles and nanofluid

Effect of baffle configuration on the thermal performance attributes of shell and semi-circular tube heat exchangers

Experimental investigation of the thermal-hydraulic performance of conically coiled tubes using Al2O3/water nanofluid

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Energy and Exergy Analysis of Shell and Coil Heat Exchanger Using Water Based Al2O3 Nanofluid Including Diverse Coil Geometries: An Experimental Study

Cited by 10 publications

References 0 publications

Study of the thermal performance characteristics of shell and semi-circular tube heat exchanger using both baffles and nanofluid

Study of the thermal performance characteristics of shell and semi-circular tube heat exchanger using both baffles and nanofluid

Effect of baffle configuration on the thermal performance attributes of shell and semi-circular tube heat exchangers

Experimental investigation of the thermal-hydraulic performance of conically coiled tubes using Al2O3/water nanofluid

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Energy and Exergy Analysis of Shell and Coil Heat Exchanger Using Water Based Al₂O₃ Nanofluid Including Diverse Coil Geometries: An Experimental Study