Experimental investigation of melting behaviour of phase change material in finned rectangular enclosures under different inclination angles

Kamkari, Babak; Groulx, Dominic

doi:10.1016/j.expthermflusci.2018.04.007

Cited by 180 publications

(30 citation statements)

References 43 publications

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“…Diverse categories of phase change material have also been tested for the photovoltaic [5] and the eutectic mixture of capric-palmitic acid is declared to be preferable. Kamkari et al [6] have tested the consequence of inclination of confinement containing phase change material exposing back to heat-source and reported that the zero inclination can lead to early melting.…”

Section: Experimental Studiesmentioning

confidence: 99%

Power improvement of finned solar photovoltaic phase change material system

Singh

Khanna

Becerra

et al. 2020

Energy

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Fins enabled Phase Change Material (FPCM) has potential to take away the thermal energy from photovoltaic (PV) and increase the efficiency. This study analyses the PV-FPCM arrangement and presents a mathematical model. The arrangement is studied under various azimuths of wind, its flow rates, temperature of surroundings, phase change temperature and dimensions of FPCM confinement. The duration of power improvement of PV using FPCM, power production, efficiency improvement and Power-Voltage (P-V) curves are reported. The outcomes convey that as azimuth of wind changes from 75° to 0°, the duration of power improvement elevates from 6.1h to 7.3h for 5cm deep FPCM confinement. It increases from 4.9h to 5.8h for 4cm deep FPCM confinement. Moreover, decrement in wind flow rate from 6m/s to 1m/s contracts the duration of power improvement from 7.8h to 6.1h.

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Section: Experimental Studiesmentioning

confidence: 99%

Power improvement of finned solar photovoltaic phase change material system

Singh

Khanna

Becerra

et al. 2020

Energy

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“…Wherein, for the fastest thermal dissipation, the fins of a cooler and the substrate must have a high thermal conductivity. For effective passive cooling, lauric acid [44,45] with a melting temperature of 46 • C, which, in addition to high latent heat, also has a high heat capacity, was chosen as PCM. The melting range in the considered setting using the smoothing function ϕ is 45.7-46.3 • C. For the profile, a material with high thermal conductivity, copper, was selected, and a silicon element was chosen for the heater.…”

Section: Resultsmentioning

confidence: 99%

“…The results obtained for grids of 480 × 200 elements and 720 × 300 elements are practically identical, namely, the difference in the volume of the melt at t = 35 min is 0.2%. The numerical algorithm was applied to a number of test problems [44][45][46]. To compare the model results, the experimental problem of melting lauric acid inside a closed system containing an aluminum profile with the finned plate was chosen.…”

Section: Numerical Techniquementioning

confidence: 99%

“…The system is heated by water as a heat transfer fluid that circulates in the tubes inside the profile substrate. Figure 3a shows a comparison of the experimental data [44] and the obtained numerical results. In this Figure 3a the black color illustrates the melt, while the white color illustrates the unmelted material shown in the photograph of the region from the side wall of low thermal conductivity; isotherms, obtained numerically, are superimposed on it.…”

Section: Numerical Techniquementioning

confidence: 99%

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Influence of the Fin Shape on Heat Transport in Phase Change Material Heat Sink with Constant Heat Loads

2021

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Nowadays, the heat transfer enhancement in electronic cabinets with heat-generating elements can be achieved using the phase change materials and finned heat sink. The latter allows to improve the energy transference surface and to augment the cooling effects for the heat sources. The present research deals with numerical analysis of phase change material behavior in an electronic cabinet with an energy-generating element. For an intensification of heat removal, the complex finned heat sink with overall width of 10 cm was introduced, having the complicated shape of the fins with width of 0.33 cm and height H = 5 cm. The fatty acid with melting temperature of 46 °C was considered as a phase change material. The considered two-dimensional challenge was formulated employing the non-primitive variables and solved using the finite difference method. Impacts of the volumetric heat flux of heat-generating element and sizes of the fins on phase change material circulation and energy transference within the chamber were studied. It was shown that the presence of transverse ribs makes it possible to accelerate the melting process and reduce the source temperature by more than 12 °С at a heat load of 1600 W/m. It should also be noted that the nature of melting depends on the hydrodynamics of the melt, so the horizontal partitions reduce the intensity of convective heat transfer between the upper part of the region and the lower part.

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“…To achieve possibly short melting time in rectangular enclosures, it is recommended to set the enclosure horizontally, i.e., the long walls should be oriented horizontally, and the heat source should be located on the bottom wall, which was reported by Kamkari and Amlashi [135] who found that when the inclination angle of the rectangular enclosure was changed from 90 (vertical) to 45, and 0 • (horizontal), the melting time of the PCM decreased by 37%, and 52%, respectively. Kamkari and Groulx [136] additionally concluded that decreasing the inclination angle of the enclosure was more beneficial than adding the fins to the vertical enclosure. A similar finding was reported by Karami and Kamkari [137], who concluded that the melting time of the PCM in the vertical non-finned enclosure was shorter than the melting time in the 1-fin and 3-fin enclosures inclined at more than 90 • .…”

Section: Enclosure-type Heat Exchangersmentioning

confidence: 99%

The Impact of Heat Exchangers’ Constructions on the Melting and Solidification Time of Phase Change Materials

et al. 2020

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An application of latent heat thermal energy storage systems with phase change materials seems to be unavoidable in the present world. The latent heat thermal energy storage systems allow for storing excessive heat during low demand and then releasing it during peak demand. However, a phase change material is only one of the components of a latent heat thermal energy storage system. The second part of the latent heat thermal energy storage is a heat exchanger that allows heat transfer between a heat transfer fluid and a phase change material. Thus, the main aim of this review paper is to present and systematize knowledge about the heat exchangers used in the latent heat thermal energy storage systems. Furthermore, the operating parameters influencing the phase change time of phase change materials in the heat exchangers, and the possibilities of accelerating the phase change are discussed. Based on the literature reviewed, it is found that the phase change time of phase change materials in the heat exchangers can be reduced by changing the geometrical parameters of heat exchangers or by using fins, metal foams, heat pipes, and multiple phase change materials. To decrease the phase change material’s phase change time in the tubular heat exchangers it is recommended to increase the number of tubes keeping the phase change material’s mass constant. In the case of tanks filled with spherical phase change material’s capsules, the capsules’ diameter should be reduced to shorten the phase change time. However, it is found that some changes in the constructions of heat exchangers reduce the melting time of the phase change materials, but they increase the solidification time.

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Experimental investigation of melting behaviour of phase change material in finned rectangular enclosures under different inclination angles

Cited by 180 publications

References 43 publications

Power improvement of finned solar photovoltaic phase change material system

Power improvement of finned solar photovoltaic phase change material system

Influence of the Fin Shape on Heat Transport in Phase Change Material Heat Sink with Constant Heat Loads

The Impact of Heat Exchangers’ Constructions on the Melting and Solidification Time of Phase Change Materials

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