Enhancement the performance of swirl heat exchanger by using vortices and NanoAluminume

Hashim, Walaa Mousa; Hoshi, Hisham Assi; Al-Salihi, Huda A.

doi:10.1016/j.heliyon.2019.e02268

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…[2]found that when adding 0.3% nanoparticles of cupper to ethylene glycol (EG), the thermal conductivity of this nanofluid increased by 40 %. This increases in thermal conductivity was also found in other studies with different concentrations of nanofluid particles [3]. Furthermore, using twisted tape in a spirally corrugated tube can improve the heating effectiveness.…”

Section: Introductionsupporting

confidence: 85%

Turbulent Heat Transfer for Internal Flow of Ethylene Glycol-Al2o3 Nanofluid in a Spiral Grooved Tube With Twisted Tape Inserts

ALJANABI

Al-Abbas

Carutasiu

et al. 2021

Journal of Thermal Engineering

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Numerical investigation for turbulent flow of nanofluid (Ethylene glycol/water-Al2O3) is carried out with a volume fraction of 0.5%, 1%, and 1.5%. The diameter of solid nanoparticles is equal to 20 nm. The range of Reynolds number in this simulation is from 6300 to 27500 through a three-dimensional steel corrugated spirally tube. For enhancement of the heat transfer performance in internal flow through the horizontal tube, the tube is combined with aluminum twist tape of a thickness of 0.8 mm and a width of 10 mm along the spirally corrugated tube. In the present work, the same twisted ratios TR=(y/w) are implemented for corrugated tube and tape. The predicted results showed that there is a clear increase in the values of heat transfer and the pressure drop in the direction of flow. Furthermore, the friction factor is increased because of the grooved and twisted tape which rise the resistance of the fluid flow. The values of Nusselt number are increased with the VOF of nanofluid. These numerical results are compared with the experiment found in the literature and showed a good agreement.

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Section: Introductionsupporting

confidence: 85%

Turbulent Heat Transfer for Internal Flow of Ethylene Glycol-Al2o3 Nanofluid in a Spiral Grooved Tube With Twisted Tape Inserts

ALJANABI

Al-Abbas

Carutasiu

et al. 2021

Journal of Thermal Engineering

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“…3. Thermal performance factors were obtained over (1) which indicate to the improvement transfer of heat (Nusselt number in the presence of turbulator higher than that in the plain tube), since the highest overall enhancement ratio was gained around (2.2). 4.…”

Section: Discussionmentioning

confidence: 94%

“…Techniques of heat transmission improvement are applied in many industrial purposes like refrigeration, heat exchanger, chemical industries and other manufacturing processes [1][2][3][4]. These technical methods are categorized into two major methods.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Enhancement in a Circular Tube with Novel Geometric Turbulator Inserts

Hoshi,

Abed,

Al-Salihi

et al. 2024

MMEP

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The characteristics of heat transmission in a cylindrical tube equipped with novel geometric turbulators inserts were investigated experimentally. The effects of two geometric parameters (ratio of pitch P=L/D and interior angle) on fiction factor, Nusselt number, the thermal executions were tested and compared with a smooth tube for the same conditions. Reynolds number ranged from 4293 to 14310, with interior angles of 20°, 60°, and 95°, and pitch ratios between 4.44 and 5.83. The relation between friction factor and Nusselt number for practical applications have successfully predicted. It was revealed that friction factor, Nusselt number, and thermal performance enhanced with reducing the pitch ratio and the interior angle. Nusselt number raised by 91,117 and 154%, friction factor enhanced by 82.7, 105.3 and 136.1 compared with smooth tube at ratio pf pitch L/D=4.44 and interior angle θ=20°. The factor of thermal performance was discovered to be larger than the unity for all arrangements and the maximum value obtained at η=2.2.

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“…Dispersing nanoparticles across standard heat transfer liquids can increase the thermal conductivity of the working fluids without significantly altering their chemical and physical properties, which increases the rate of heat transfer. As a result, the heat transfer coefficient of the heat transfer fluids has risen significantly due to the implementation of nano-fluids rather than pure fluid in heat exchanger tubes, although there has been a moderate pressure drop (Hashim et al, 2019;Alazwari et al, 2021;Ghazanfari et al, 2023). The viscosity of the solution increases along with the volume percentages of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of shell and helical coiled heat exchanger with Al2O3 nano-fluid with wide range of particle concentration

Shabi,

Alhazmy,

Negeed

et al. 2024

Front. Mech. Eng.

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The purpose of this study is to experimentally enhance the heat exchange rate of the shell and helical coil tube heat exchanger by mixing water with aluminum oxide (Al2O3) nanoparticles, as well as to explore the effect of inlet thermal parameters on the performance of the heat exchanger. A test rig was constructed to investigate the influence of particle concentration, and inlet temperatures on the performance of nano-fluid. Parameters such as Nusselt number, pressure drop, performance evaluation criteria (PEC) are considered to rate the performance of the nano-particle with the heat exchanger. In this study a wider range of particle concentration is considered, which varies from 0.0%–0.75%. Experiments with and without nanoparticles are carried out under identical working conditions. By analyzing the experimental data, it was found that nanoparticles significantly improve the coefficient of heat transfer inside the helically coiled tube. From sensitivity analysis, it is obseerved that there is a slight decrease in Nusselt number of the nano-fluid with increase in inlet temperatures of the nano-fluid and the cooling water. Furthermore, it is concluded that an 8.5% increase in PEC value is observed with increase in particle concentration from 0.15% to 0.75%.

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Enhancement the performance of swirl heat exchanger by using vortices and NanoAluminume

Cited by 6 publications

References 18 publications

Turbulent Heat Transfer for Internal Flow of Ethylene Glycol-Al2o3 Nanofluid in a Spiral Grooved Tube With Twisted Tape Inserts

Turbulent Heat Transfer for Internal Flow of Ethylene Glycol-Al2o3 Nanofluid in a Spiral Grooved Tube With Twisted Tape Inserts

Heat Transfer Enhancement in a Circular Tube with Novel Geometric Turbulator Inserts

Experimental investigation of shell and helical coiled heat exchanger with Al2O3 nano-fluid with wide range of particle concentration

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