Phase change heat transfer in a rectangular enclosure as a function of inclination and fin placement

Groulx, Dominic; Biwolé, Pascal Henry; Bhouri, Maha

doi:10.1016/j.ijthermalsci.2020.106260

Cited by 65 publications

(15 citation statements)

References 30 publications

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“…There are some variations in the literature on what reference density is chosen. Most frequently, the reference density is set to the value of the liquid density [27,28,30,57]. Alternatively, others calculate the reference density based on the average of the solid and liquid densities [58] or based on a solid density reference rather than the liquid density [42].…”

Section: Density Treatmentsmentioning

confidence: 99%

Experimental and Numerical Investigation of Lauric Acid Melting at Suboptimal Inclines

Troxler

Freeman

Rodríguez

et al. 2023

ASME Open Journal of Engineering

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Accurate modeling of melting and solidification processes is important to many engineering applications. The research presented in this article is part of an ongoing effort to document the melting behavior of lauric acid in a 50 mm by 120 mm rectangular container with an isothermal side—an experiment commonly used to validate numerical models. This article presents new experimental data of melting occurring at 135 deg and 180 deg inclines for isothermal wall temperatures of 60∘C and 70∘C. The data were processed to show the melt interface development and the melt fraction as a function of time. Furthermore, numerical simulations using the enthalpy-porosity method of the 135 deg incline were also conducted. In the numerical simulations, the mushy zone constant was parametrically varied. Different density approaches commonly found in the literature (e.g., density as a function of temperature or Boussinesq approximation) were utilized and examined. It was found that the choice of density method had a significant effect on the results. Implications of potential modeling choices unique to the enthalpy-porosity method are discussed related to the validation of models.

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Section: Density Treatmentsmentioning

confidence: 99%

Experimental and Numerical Investigation of Lauric Acid Melting at Suboptimal Inclines

Troxler

Freeman

Rodríguez

et al. 2023

ASME Open Journal of Engineering

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“…Accordingly, low values of front and back panel temperatures could be maintained during a stability period of 80 min and with varying angle of inclination from 0 to 75 • from vertical. The resulting effective temperature control was not related to the geometry of the fin [86]. In [87], the natural thermal behavior of a fuse for a PCM in a rectangular reservoir, which could be proper for cooling applications for photovoltaic panels, was investigated.…”

Section: Pv Modules Integrated With a Phase-change Materials And Finsmentioning

confidence: 99%

Photovoltaic Thermal Collectors Integrated with Phase Change Materials: A Comprehensive Analysis

et al. 2022

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The target of the current study was to review and analyze the research activities of previous studies on cooling techniques for thermal photovoltaic (PV) systems using phase-change materials. These materials have the ability to absorb and release certain amounts of potential heat energy by changing their state from phase to phase (solid–liquid) within a small temperature range. These materials have been used to regulate and lower the temperature, increase the efficiency, and extend the life of solar cells. A host of improvements have been made to phase-changing materials through the combined utilization of phase-change materials and fins in addition to nanoscale fluids to enhance electrical efficiency. When using PCMs, the thermal, electrical, and overall efficiency improved by 26.87%, 17.33%, and 40.59%, respectively. The addition of nanomaterials increased phase-change materials’ specific heat capacity and thermal conductivity, thus reducing the plate temperature and increasing the electrical efficiency. It was found that using of nanoparticles together with a microcapsule had better performance in terms of energy efficiency. Studies indicated that variable phase materials were not used because of their high cost and lack of stable operational design. Therefore, the effect of phase-change materials on PV/thermal (PVT) system performance needs further investigation and study.

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“…where D(T) is a gaussian function (Eq.16) and B(T) is a function of temperature to represent the melting fraction which is equal to 1 in the liquid phase and 0 in the solid phase. For avoiding the sudden jump in the value by considering the phase transition, a function increases linearly from 0 to 1 [64].…”

Section: Energy Conservation Equationmentioning

confidence: 99%

Performance Assessment of Nano-enhanced Phase Change Material for Thermal Storage

Daneshazarian

Antoun

Dworkin

2021

International Journal of Heat and Mass Transfer

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Phase change heat transfer in a rectangular enclosure as a function of inclination and fin placement

Cited by 65 publications

References 30 publications

Experimental and Numerical Investigation of Lauric Acid Melting at Suboptimal Inclines

Experimental and Numerical Investigation of Lauric Acid Melting at Suboptimal Inclines

Photovoltaic Thermal Collectors Integrated with Phase Change Materials: A Comprehensive Analysis

Performance Assessment of Nano-enhanced Phase Change Material for Thermal Storage

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