Localized heating element distribution in composite metal foam‐phase change material: Fourier's law and creeping flow effects

Talebizadehsardari, Pouyan; Mohammed, Hayder I.; Mahdi, Jasim M.; Ghalambaz, Mohammad; Gillott, Mark; Walker, Gavin S.; Grant, David M.; Giddings, Donald

doi:10.1002/er.6665

Cited by 25 publications

(8 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Still, a major concern for the LHTES system is PCM's minimal thermal Energies 2021, 14, 7179 2 of 23 efficiency, which decreases the phase change rate [14][15][16][17]. Researchers developed several techniques to improve the heat transfer rate of such systems, including the expansion of the heat transfer surface area [18][19][20], adding micro or nano-sized particles [21][22][23][24], using cascade layer PCM [25], encapsulation techniques [26,27], changing the location of the heat transfer fluid (HTF) channel [28][29][30], fins combinations [31][32][33], conductive foams [34][35][36], and using magnetic fields [37,38].…”

Section: Introductionmentioning

confidence: 99%

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

et al. 2021

Self Cite

View full text Add to dashboard Cite

This work evaluates the influence of combining twisted fins in a triple-tube heat exchanger utilised for latent heat thermal energy storage (LHTES) in three-dimensional numerical simulation and comparing the outcome with the cases of the straight fins and no fins. The phase change material (PCM) is in the annulus between the inner and the outer tube, these tubes include a cold fluid that flows in the counter current path, to solidify the PCM and release the heat storage energy. The performance of the unit was assessed based on the liquid fraction and temperature profiles as well as solidification and the energy storage rate. This study aims to find suitable and efficient fins number and the optimum values of the Re and the inlet temperature of the heat transfer fluid. The outcomes stated the benefits of using twisted fins related to those cases of straight fins and the no-fins. The impact of multi-twisted fins was also considered to detect their influences on the solidification process. The outcomes reveal that the operation of four twisted fins decreased the solidification time by 12.7% and 22.9% compared with four straight fins and the no-fins cases, respectively. Four twisted fins improved the discharging rate by 12.4% and 22.8% compared with the cases of four straight fins and no-fins, respectively. Besides, by reducing the fins’ number from six to four and two, the solidification time reduces by 11.9% and 25.6%, respectively. The current work shows the impacts of innovative designs of fins in the LHTES to produce novel inventions for commercialisation, besides saving the power grid.

show abstract

Section: Introductionmentioning

confidence: 99%

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is due to the existence of pores, which promote the weaving of the fluid traveling through them, resulting in increased terrestrial convective heat dissipation into the surrounding [ 9 , 10 ]. Applying metal foam [ 11 , 12 , 13 , 14 ], nano-additives [ 15 , 16 , 17 , 18 ], functional nano-phase change coolants [ 19 , 20 ], and magnetic fields [ 21 ] are some of enhancement techniques. Another enhancement technique is using metal nanofoam.…”

Section: Introductionmentioning

confidence: 99%

Improving the Melting Duration of a PV/PCM System Integrated with Different Metal Foam Configurations for Thermal Energy Management

et al. 2022

Self Cite

View full text Add to dashboard Cite

The melting duration in the photovoltaic/phase-change material (PV/PCM) system is a crucial parameter for thermal energy management such that its improvement can realize better energy management in respect to thermal storage capabilities, thermal conditions, and the lifespan of PV modules. An innovative and efficient technique for improving the melting duration is the inclusion of an exterior metal foam layer in the PV/PCM system. For detailed investigations of utilizing different metal foam configurations in terms of their convective heat transfer coefficients, the present paper proposes a newly developed mathematical model for the PV/PCM–metal foam assembly that can readily be implemented with a wide range of operating conditions. Both computational fluid dynamic (CFD) and experimental validations proved the good accuracy of the proposed model for further applications. The present research found that the average PV cell temperature can be reduced by about 12 °C with a corresponding improvement in PCM melting duration of 127%. The addition of the metal foam is more effective at low solar radiation, ambient temperatures far below the PCM solidus temperature, and high wind speeds in nonlinear extension. With increasing of tilt angle, the PCM melting duration is linearly decreased by an average value of (13.4–25.0)% when the metal foam convective heat transfer coefficient is changed in the range of (0.5–20) W/m2.K. The present research also shows that the PCM thickness has a positive linear effect on the PCM melting duration, however, modifying the metal foam configuration from 0.5 to 20 W/m2.K has an effect on the PCM melting duration in such a way that the average PCM melting duration is doubled. This confirms the effectiveness of the inclusion of metal foam in the PV/PCM system.

show abstract

“…From a design perspective, the selection of adequate PCM casing and the incorporation of the proper mass/volume of the enhancement material are two crucial steps for overcoming issues of low PCM-to-demand responding rates. The high conductivity nanoparticles [26,27], extended fins [28][29][30][31][32][33][34] and porous matrices [35][36][37][38][39] are among the most famous enhancement materials. Applying fins to increase the heat-transfer area in charge is considered the most traditional technique for improving the thermal response in energy systems.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Heat Transfer Enhancement in a Triple Tube Latent Heat Storage System Using Circular Fins with Inline and Staggered Arrangements

et al. 2021

Self Cite

View full text Add to dashboard Cite

Inherent fluctuations in the availability of energy from renewables, particularly solar, remain a substantial impediment to their widespread deployment worldwide. Employing phase-change materials (PCMs) as media, saving energy for later consumption, offers a promising solution for overcoming the problem. However, the heat conductivities of most PCMs are limited, which severely limits the energy storage potential of these materials. This study suggests employing circular fins with staggered distribution to achieve improved thermal response rates of PCM in a vertical triple-tube heat exchanger involving two opposite flow streams of the heat-transfer fluid (HTF). Since heat diffusion is not the same at various portions of the PCM unit, different fin configurations, fin dimensions and HTF flow boundary conditions were explored using computational studies of melting in the PCM triple-tube system. Staggered configuration of fin distribution resulted in significant increases in the rates of PCM melting. The results indicate that the melting rate and heat charging rate could be increased by 37.2 and 59.1%, respectively, in the case of staggered distribution. Furthermore, the use of lengthy fins with smaller thickness in the vertical direction of the storage unit resulted in a better positive role of natural convection; thus, faster melting rates were achieved. With fin dimensions of 0.666 mm × 15 mm, the melting rate was found to be increased by 23.6%, when compared to the base case of 2 mm × 5 mm. Finally, it was confirmed that the values of the Reynolds number and inlet temperatures of the HTF had a significant impact on melting time savings when circular fins of staggered distribution were included.

show abstract

Localized heating element distribution in composite metal foam‐phase change material: Fourier's law and creeping flow effects

Cited by 25 publications

References 61 publications

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

Improving the Melting Duration of a PV/PCM System Integrated with Different Metal Foam Configurations for Thermal Energy Management

Investigation of Heat Transfer Enhancement in a Triple Tube Latent Heat Storage System Using Circular Fins with Inline and Staggered Arrangements

Contact Info

Product

Resources

About