Parametric CFD Analysis and Impact of PCM Intrinsic Parameters on Melting Process inside Enclosure Integrating Fins: Solar Building Applications
| Autor: | Saïf ed-Dîn Fertahi, T. El Rhafiki, Abdelmajid Jamil, Tarik Kousksou, T. Bouhal, E. Ben Ghoulam, Zouhair Meghari |
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| Přispěvatelé: | Ecole Nationale Supérieure d'Arts et Métiers [Meknes] (ENSAM), Université Moulay Ismail (UMI), Laboratoire des Sciences de l'Ingénieur Appliquées à la Mécanique et au génie Electrique (SIAME), Université de Pau et des Pays de l'Adour (UPPA) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Work (thermodynamics)
Materials science Fin Fins shape 020209 energy Enclosure Heat transfer enhancement 02 engineering and technology 7. Clean energy Heat capacity Thermal energy storage Thermal conductivity Architecture 0202 electrical engineering electronic engineering information engineering Building Safety Risk Reliability and Quality Civil and Structural Engineering [PHYS]Physics [physics] Natural convection Building and Construction Rayleigh number Mechanics Thermophysical properties effects 021001 nanoscience & nanotechnology Mechanics of Materials PCM Heat transfer 0210 nano-technology CFD analysis |
| Zdroj: | Journal of Building Engineering Journal of Building Engineering, Elsevier, 2018, 20, pp.634-646. ⟨10.1016/j.jobe.2018.09.016⟩ |
| ISSN: | 2352-7102 |
| Popis: | The overall aim of this work is to integrate PCM elements into passive solar buildings . To achieve this goal, several numerical studies were carried out to describe the complex behavior of PCM melting filling a rectangular enclosure initially set at a cold temperature T c . The cavity is vertically heated from the right side wall with a temperature T h = 38.3 ° C while and the left cold wall was maintained at the cold temperature T c = 28.3 ° C . The horizontal walls were insulated. A transient numerical model based on the enthalpy-porosity formulation is used to study the heat transfer and the melting behaviors through two-dimensional CFD simulations. To enhance the heat transfer and the melting process of the PCM, fins with a rectangular and triangular shape are proposed. Moreover, the effects of both thermophysical properties and fins integration on the flow structure and heat transfer characteristics are investigated in detail. The melt fraction contours with the natural convection driven flow are described and compared, as well as the temperature distributions for a Rayleigh number of around Ra = 10 6 . It is found that the rate of the melting increases with the increase in the values of specific heat capacity C p as well as the thermal conductivity λ of the PCM Gallium . The results showed that the rectangular fin configuration accelerated the PCM melting faster than the triangular fin's shape (the melting time has improved from 35 min to 32 min) thanks to the increased exchange area, while the triangular fin uniformized the melting process inside the enclosure. |
| Databáze: | OpenAIRE |
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