Enhanced Heat Transfer for NePCM-Melting-Based Thermal Energy of Finned Heat Pipe

Ahmed, Sameh E.; Abderrahmane, Aissa; Alotaibi, Sorour; Younis, Obai; Almasri, Radwan A.; Hussam, Wisam K.

doi:10.3390/nano12010129

Cited by 31 publications

(12 citation statements)

References 53 publications

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“…The average Nusselt number passes through a local maximum and decreases gradually as the temperature of the PCM meted approaches that of the heated wall. Concerning the effect of adding nanoparticles, we notice from Figure 11B that the average Nusselt number diminished as the volume fraction of nanoparticles increased due to the decreases in the temperature gradients; this result is also inconsistent with those of Ahmed et al 35 …”

Section: Resultscontrasting

confidence: 94%

Melting of nano‐enhanced phase change material in a cavity heated sinusoidal from below: Numerical study using lattice Boltzmann method

Laouer

Al‐Farhany

2022

Heat Trans

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Natural convection and melting of ice as a phase change material dispersed with copper nanoparticles are numerically investigated. Square cavity filled with nano‐mixture (Cu−ice) subjected to sinusoidal temperature distributions from the hot bottom boundary. The phase change process and heat transfer are formulated and solved using the enthalpy‐based lattice Boltzmann method. Home‐built numerical code is developed and validated. The effect of Rayleigh number (Ra = 104, 105, and 106) and copper nanoparticle concentration (ϕ = 0%, 1%, 3%, and 5%) on the flow characteristics and thermal performance of NePCM during the melting process is examined. According to the numerical results, the melting and charging times decrease by increasing the Rayleigh number. It is also observed that increasing the volume fraction of nanoparticle decrease melting time by up to 10%.

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Section: Resultscontrasting

confidence: 94%

Melting of nano‐enhanced phase change material in a cavity heated sinusoidal from below: Numerical study using lattice Boltzmann method

Laouer

Al‐Farhany

2022

Heat Trans

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“…Roughly speaking, in engineering and applied sciences, mathematical modeling, analysis, and techniques are widely used (see for instance [ 47 , 48 , 49 , 50 , 51 ]). With that has been said, an enthalpy–porosity analysis is a well-used approach for assessing unstable heat transfer situations, such as PCM phase transitions.…”

Section: Mathematical Modelmentioning

confidence: 99%

Enhancing the Melting Process of Shell-and-Tube PCM Thermal Energy Storage Unit Using Modified Tube Design

et al. 2022

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Recently, phase change materials (PCMs) have gained great attention from engineers and researchers due to their exceptional properties for thermal energy storing, which would effectively aid in reducing carbon footprint and support the global transition of using renewable energy. The current research attempts to enhance the thermal performance of a shell-and-tube heat exchanger by means of using PCM and a modified tube design. The enthalpy–porosity method is employed for modelling the phase change. Paraffin wax is treated as PCM and poured within the annulus; the annulus comprises a circular shell and a fined wavy (trefoil-shaped) tube. In addition, copper nanoparticles are incorporated with the base PCM to enhance the thermal conductivity and melting rate. Effects of many factors, including nanoparticle concentration, the orientation of the interior wavy tube, and the fin length, were examined. Results obtained from the current model imply that Cu nanoparticles added to PCM materials improve thermal and melting properties while reducing entropy formation. The highest results (27% decrease in melting time) are obtained when a concentration of nanoparticles of 8% is used. Additionally, the fins’ location is critical because fins with 45° inclination could achieve a 50% expedition in the melting process.

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“…The use of NEPCM rather than only heat transfer fluid offers several benefits in many applications. NEPCM benefits from both heat transfer fluid and PCM characteristics [ 14 , 15 , 16 , 17 ]. For instance, it was recently shown that these could improve thermal storage characteristics and also for applications such as triple tube heat exchangers [ 18 ] or shell-and-tube heat exchangers [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Natural Convection within Inversed T-Shaped Enclosure Filled by Nano-Enhanced Phase Change Material: Numerical Investigation

et al. 2022

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Energy saving has always been a topic of great interest. The usage of nano-enhanced phase change material NePCM is one of the energy-saving methods that has gained increasing interest. In the current report, we intend to simulate the natural convection flow of NePCM inside an inverse T-shaped enclosure. The complex nature of the flow results from the following factors: the enclosure contains a hot trapezoidal fin on the bottom wall, the enclosure is saturated with pours media, and it is exposed to a magnetic field. The governing equations of the studied system are numerically addressed by the higher order Galerkin finite element method (GFEM). The impacts of the Darcy number (Da = 10−2–10−5), Rayleigh number (Ra = 103–106), nanoparticle volume fraction (φ = 0–0.08), and Hartmann number (Ha = 0–100) are analyzed. The results indicate that both local and average Nusselt numbers were considerably affected by Ra and Da values, while the influence of other parameters was negligible. Increasing Ra (increasing buoyancy force) from 103 to 106 enhanced the maximum average Nusselt number by 740%, while increasing Da (increasing the permeability) from 10−5 to 10−2 enhanced both the maximum average Nusselt number and the maximum local Nusselt number by the same rate (360%).

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Enhanced Heat Transfer for NePCM-Melting-Based Thermal Energy of Finned Heat Pipe

Cited by 31 publications

References 53 publications

Melting of nano‐enhanced phase change material in a cavity heated sinusoidal from below: Numerical study using lattice Boltzmann method

Melting of nano‐enhanced phase change material in a cavity heated sinusoidal from below: Numerical study using lattice Boltzmann method

Enhancing the Melting Process of Shell-and-Tube PCM Thermal Energy Storage Unit Using Modified Tube Design

Natural Convection within Inversed T-Shaped Enclosure Filled by Nano-Enhanced Phase Change Material: Numerical Investigation

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