Melting enhancement of nano-phase change material in cylindrical enclosure using convex/concave dimples: Numerical simulation with experimental validation

Soliman, Ahmed Saad; Zhu, Shuping; Xu, Li; Dong, Junguo; Cheng, Ping

doi:10.1016/j.est.2021.103470

Cited by 19 publications

(5 citation statements)

References 60 publications

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“…perimental results of Soliman et al [10,11] for a vertical cylinder that was heated by a constant heat flux, and Kamkari and Amlashi [31] for a vertical enclosure that was heated by a constant wall temperature. The computational model and the experimental study were established under the same operating conditions.…”

Section: Numerical Procedures and Validationmentioning

confidence: 99%

“…As a result, a significant portion of the research on this topic shows the development of adequate numerical analysis [9]. The heat transfer mechanism through the melting process is initially controlled by conduction; then, natural convection begins, and this process of natural convection has a great impact and cannot be ignored [10,11].…”

Section: Numerical Techniques Limitationsmentioning

confidence: 99%

“…An image of the test rig is shown in Figure 1, while the layout is shown in Figure 2. The test rig consists of the water tank (10), which is made of galvanized sheet with a diameter of 40 cm and a height of 40 cm. The tank is used to supply the test section with hot water (11) at a constant temperature value.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…To validate the numerical model of melting in the present finite volume computational fluid dynamic (CFD) code, an initial run was established and compared to the experimental results of Soliman et al [10,11] for a vertical cylinder that was heated by a constant heat flux, and Kamkari and Amlashi [31] for a vertical enclosure that was heated by a constant wall temperature. The computational model and the experimental study were established under the same operating conditions.…”

Section: Numerical Procedures and Validationmentioning

confidence: 99%

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Effect of Mushy Zone Parameter on Phase Change Behavior of Different Configurations Storage Unit: Numerical Simulation and Experimental Validation

Soliman

Sultan

2022

Sustainability

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The melting process of paraffin wax placed in storage capsules of different shapes was experimentally and numerically studied. The phase change material (PCM) was initially at 27 °C. The effect of the mushy zone parameter (Amush) value on the melting process of the PCM was studied with storage capsules of different shapes (circular, vertical oval, and horizontal oval). The results of the numerical model were validated with the experimental results to obtain the optimum Amush value for each shape of the latent heat storage unit. The results showed that the value of the Amush has a great impact on the numerical results of the PCM melting process and changes with the shape of the storage capsule. The rate of heat transfer, convection, and fluid velocity all decrease as the Amush value rises. The experimental results of the circular, vertical oval, and horizontal oval capsules match very well with the numerical model with Amush values equal to 2 × 106, 1 × 105, and 1 × 106, respectively.

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Section: Numerical Procedures and Validationmentioning

confidence: 99%

Section: Numerical Techniques Limitationsmentioning

confidence: 99%

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Section: Numerical Procedures and Validationmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Mushy Zone Parameter on Phase Change Behavior of Different Configurations Storage Unit: Numerical Simulation and Experimental Validation

Soliman

Sultan

2022

Sustainability

Self Cite

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“…PCMs can transfer much heat during phase transitions, making them ideal for use in applications requiring large amounts of heat to be transferred. In addition to their use in air conditioning cycles [9][10][11], PCMs also used in recycling waste heat and thermal storage [12,13]. Recently, PCMs have witnessed much investigation in the field of solar power generation due to their high phase change enthalpy, ease of use, low cost, chemical stability, and usable phase transition temperature [14].…”

Section: Introductionmentioning

confidence: 99%

Impact of PCM type on photocell performance using heat pipe-PCM cooling system: A numerical study

Gad

Mahmoud

Hassan

2023

Journal of Energy Systems

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The effectiveness of a hybrid cooling system consisting of flat heat pipes (HP) and a heat sink of phase change material (PCM) for the temperature regulation of the photocell (PV) is studied. The system is mathematically modeled and numerically solved by using MatLab software. The impact of the type of PCM (RT25, RT35, and RT42) in summer on the performance of the hybrid photocell cooling system is analyzed. Results prove that the HP-PCM cooling system performs better than the natural photocell cooling. PCM with a low melting point is more efficient for electric performance than a high melting point. For a given PCM thickness of 4 cm, the maximum temperature of the photocell is reduced by 8.7 °C when PCM RT25 is used as a heat sink compared to 7.5 °C and 7.3 °C for RT35 and RT42, respectively. RT25-based PV/HP-PCM system outperformed a conventionally cooled photocell in terms of electrical efficiency by 5.3%. In comparison, RT35 and RT42 yield incremental gains of 5% and 4.5 %, respectively. As the PCM melting point is lowered, the hourly thermal efficiency increases with a peak of 48.9% for RT25, 33.7% for RT35, and 32.2% for RT42, respectively.

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Geometry effect of phase change material container on waste heat recovery enhancement

Qin

Low

et al. 2022

Applied Energy

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Melting enhancement of nano-phase change material in cylindrical enclosure using convex/concave dimples: Numerical simulation with experimental validation

Cited by 19 publications

References 60 publications

Effect of Mushy Zone Parameter on Phase Change Behavior of Different Configurations Storage Unit: Numerical Simulation and Experimental Validation

Effect of Mushy Zone Parameter on Phase Change Behavior of Different Configurations Storage Unit: Numerical Simulation and Experimental Validation

Impact of PCM type on photocell performance using heat pipe-PCM cooling system: A numerical study

Geometry effect of phase change material container on waste heat recovery enhancement

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