Numerical Analysis and Experimental Validation of Heat Transfer During Solidification of Phase Change Material in a Large Domain

Jurčević, Mišo; Penga, Željko; Klarin, Branko; Nižetić, Sandro

doi:10.1016/j.est.2020.101543

Cited by 9 publications

(2 citation statements)

References 33 publications

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“…The freezing problem also appears in newer-energy power devices, such as proton exchange membrane fuel cells (PEMFC) [25]. Furthermore, certain latent heat storage systems are based on ice storage, where liquefaction rate, temperature distribution, and heat transfer coefficient stand out as important, influential factors during the phase change [26]. Evidently, the thermal properties of ice are very important for understanding the experimental results and for the numerical modelling [27] of cold energy retrieval.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Properties of Frozen Tap, Demineralized, and Sea Water

Bošnjak,

Jurčević,

Bodrožić Ćoko

et al. 2023

Energies

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This paper reports an experimental investigation of the thermal properties of frozen tap, demineralized, and sea water. The presented research assists in a better understanding of the thermal properties of ice and the processes within it and contributes regarding the generation of novel experimental data. The thermal conductivity was measured in a range from −14 °C to −33 °C using the Transient Plane Source (TPS) method. Ice blocks were placed in an expanded polystyrene box in the freezer, which is where the measurements took place. The thermal conductivity of the tap water ice was observed to vary in a range from 1.915 ± 0.005 Wm−1K−1 at −14 °C to 2.060 ± 0.004 Wm−1K−1 at −33 °C. The values obtained for the ice made of demineralized water differed by less than 10%. The thermal conductivity of the sea ice was shown to be more temperature dependent, with the values ranging from 1.262 ± 0.005 Wm−1K−1 at −14 °C to 1.970 Wm−1K−1 ± 0.004 at −33 °C. A noticeable fall in the thermal conductivity of the sea ice was observed in the temperature range from −26 °C to −19 °C. A possible reason for this could be the increased precipitation of salt in that temperature range. Measurements of thermal diffusivity displayed similar trends as those of thermal conductivity. Specific volumetric heat capacity was indirectly calculated.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Properties of Frozen Tap, Demineralized, and Sea Water

Bošnjak,

Jurčević,

Bodrožić Ćoko

et al. 2023

Energies

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“…On the other hand, natural convection is included in other studies such as in Qi et al [20], in which the melting mechanism and thermal behavior of PCM in a slender rectangular cavity with flow boundary condition were investigated. Jurćević et al [21] proposed a numerical investigation on transient solidification of PCM dominated by natural convection in a large domain. Gürel [22] investigated the melting heat transfer in different plate heat exchanger systems and finally, Hajjar et al [23] studied the Nano Encapsulated Phase Change Materials (NEPCMs) suspension natural convection in a cavity with time-periodic temperature hot wall.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a Phase Change Material Including Natural Convection Effects

2021

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Nowadays, Organic Rankine Cycle (ORC) is one of the most promising technologies analyzed for electrical power generation from low-temperature heat such as renewable energy sources (RES), especially solar energy. Because of the solar source variation throughout the day, additional Thermal Energy Storage (TES) systems can be employed to store the energy surplus saved during the daytime, in order to use it at nighttime or when meteorological conditions are adverse. In this context, latent heat stored in phase-change transition by Phase Change Materials (PCM) allows them to stock larger amounts of energy because of the larger latent energy values as compared to the specific heat capacity. In this study, a thermal analysis of a square PCM for a solar ORC is carried out, considering four different boundary conditions that refer to different situations. Furthermore, differences in including or not natural convection effects in the model are shown. Governing equations for the PCM are written with references to the heat capacity method and solved with a finite element scheme. Experimental data from literature are employed to simulate the solar source using a time-variable temperature boundary condition. Results are presented in terms of temperature profiles, stored energy, velocity fields and melting fraction, showing that natural convection effects are remarkable on the temperature values and consequently on the stored energy achieved.

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Experimental investigation of novel hybrid phase change materials

Jurčević

Nižetić

Čoko

et al. 2021

Clean Techn Environ Policy

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Numerical Analysis and Experimental Validation of Heat Transfer During Solidification of Phase Change Material in a Large Domain

Cited by 9 publications

References 33 publications

Experimental Investigation of Thermal Properties of Frozen Tap, Demineralized, and Sea Water

Experimental Investigation of Thermal Properties of Frozen Tap, Demineralized, and Sea Water

Numerical Investigation of a Phase Change Material Including Natural Convection Effects

Experimental investigation of novel hybrid phase change materials

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