Evaluation of thermal performance factor by hybrid nanofluid and twisted tape inserts in heat exchanger

Hamza, Noor Fouad. A.; Aljabair, Sattar

doi:10.1016/j.heliyon.2022.e11950

Cited by 19 publications

(3 citation statements)

References 42 publications

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“…In addition to testing and comparing different finned tube heat exchangers, Longeon et al [35] will use graphite foam to increase PCM thermal conductivity. By employing twisted tape as a tabulator and (CuO/distilled water and Al2O3) as the working fluid, Fouad and Aljabair [36] improved the thermal performance of exchangers. Esapour et al [37] examined the incorporation of PCM with porous metal foam while examining a horizontal multi-tube heat storage system.…”

Section: ~ 42 ~mentioning

confidence: 99%

Improving the Thermal Storage System (LHTES): A theoretical and experimental study

Aljumaily,

Al-Jubouri,

Al-Jubouri

2024

Int. J. Mech. Therm. Eng.

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The research aims to enhance the thermal efficiency of a thermal storage system by altering the geometric shapes of the inner tube through theoretical and experimental studies. Six inner tube forms were selected: Pentagonal, hexagonal, square, rectangular, circular, and elliptical, all with the same outside surface area. Paraffin wax, a phase transition substance, is deposited in the shell, while water, a Heat Transfer Fluid (HTF), flows through the inner tube at a rate of two liters per minute. A 3D simulation was performed using the Computational Fluid Dynamics (CFD) software ANSYS Fluent 2020 R2 for all chosen geometric shapes. The findings suggest that the circular tube outperformed the other forms examined in terms of absorbing heat from the PCM through the HTF.

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Section: ~ 42 ~mentioning

confidence: 99%

Improving the Thermal Storage System (LHTES): A theoretical and experimental study

Aljumaily,

Al-Jubouri,

Al-Jubouri

2024

Int. J. Mech. Therm. Eng.

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“…Finally, the potential of nanofluids as thermal storage mediums was highlighted, as they possess high thermal conductivity and heat capacity, enabling them to absorb and release heat more efficiently than traditional fluids [32,33].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Thermal Storage Tank with Middle Baffles Distributions

Karam,

Ibrahim,

Alesbe

et al. 2023

MMEP

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A numerical investigation into the influence of baffle placement on thermal stratification within a vertical cylindrical cold-water tank is conducted. The tank, sporting a diameter of 400 mm and a height of 1000 mm, incorporates inlet and outlet ports of equal diameter (17.39 mm). The baffles, integral to this study, are of 200 mm in length and 2 mm in thickness. The study leverages computational methodologies to decipher the equations that govern heat transfer and fluid flow within a baffle-integrated tank. The tank commences with an initial water temperature of 4.4℃, and an inflow of water at 13.3℃, from the upper left side. Validation of the adopted tests is sought through experimental data available in extant literature. The abstract delves into the impact of baffle number and positioning on a multitude of elements-thermocline temperature, streamline creation, vortex formation, velocity vectors, Stratification Number, and Richardson Number-across varied cases during the discharging phase. The introduction of one or two baffles exerts a marginal effect on temperature distribution contours. However, a third baffle accentuates this impact, expanding the hot-cold interface with a pronounced penetration effect within the tank. Interestingly, the influence of three baffles on temperature distribution contours diminishes at a discharging time of 2173.4 s. This study provides insight into the nuanced role of baffles within thermal storage tanks, elucidating key considerations for their optimal placement and number.

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“…al. [14] use hybrid nanofluids (Al2O3, CuO/ distilled water) under turbulent flow condition, where the nanofluid as a working fluid and twisted tape is the turbulator. The heat transfer was increases with the use of twisted tape, and the best results obtained with double v-cut twisted tape in comparison with twisted tape.…”

Section: Introductionmentioning

confidence: 99%

Number of Tape Twists Effects on Solar Water Heater Performance

Abdullah,

J. Hasan

2023

IJIE

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In solar applications, research into appropriate methods to improve the performance of the solar water heater is important. The current work studies improved the performance of the solar water heater by analyzing the effect of the number of added tape twists. A four-pipe solar water heater was built, and four twisted tapes were used, each with a different number of twists (flat, one, three, and five twists), and each tape was inserted into a pipe. The addition of twisted tapes has found that improved the performance of the solar water heater, and this improvement increased with the number of twists. A one, three, and five-twisted tapes achieved a temperature increase of (5.33, 14.09, and 20.27%) respectively, relative to a flat tape, and the instantaneous efficiency of the five twists tape was the highest, where the highest instantaneous efficiency of the four types rates (9.6, 13.4, 13.8, and 15 %) respectively.

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Evaluation of thermal performance factor by hybrid nanofluid and twisted tape inserts in heat exchanger

Cited by 19 publications

References 42 publications

Improving the Thermal Storage System (LHTES): A theoretical and experimental study

Improving the Thermal Storage System (LHTES): A theoretical and experimental study

Numerical Simulation of Thermal Storage Tank with Middle Baffles Distributions

Number of Tape Twists Effects on Solar Water Heater Performance

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