Numerical Study of Mixed Convection in Thephotovoltaic Tromb Wall Window for Passive Cooling in Bioclimatic Buildings.

Nougbléga, Yawovi; Solaire, Laboratoire Sur l’Energie

doi:10.21474/ijar01/7594

Cited by 2 publications

(1 citation statement)

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“…The results demonstrate that incorporating baffles increases the heat transfer rate by a factor of 1.4 for steady flow and 3.5 for unsteady flow, as compared to the smooth channel. Nougbléga et al (2020) carried out numerical study to investigate how the location of baffles in a vented cavity affects mixed convection. They reported that the positions of heated baffles attached to the horizontal walls allow to create simultaneously a heated region and an isolated region in the vented cavity.…”

Section: Introductionmentioning

confidence: 99%

Baffle effects on enhancing cooling performance of electronic components by nanofluid in a horizontal channel

Armou

Hssain

Nouari

et al. 2023

HFF

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Purpose The purpose of this study is to investigate the impact of varying baffle height and spacing distance on heat transfer and cooling performance of electronic components in a baffled horizontal channel, using a Cu-H2O nanofluid under mixed convection and laminar flow. Design/methodology/approach The mathematical model is two-dimensional and comprises a system of four governing equations, such as the conservation of continuity, momentum and energy. To obtain numerical solutions for these equations, the finite volume method was used for discretization. A validation process was performed by comparing this study’s results with those of previously published studies. The comparison revealed a close agreement. The numerical study was performed for a wide range of key parameters: The baffle height (0 ≤ h ≤ 0.7), the spacing distance between baffle and blocks (0.25 ≤ w ≤ 3), the Grashof and Reynolds numbers are kept equal to 104 and 75, respectively, the channel aspect ratio is L/H = 10, and the volume fraction of Cu nanoparticles is fixed at φ = 5%. Findings The results of the study reveal a significant improvement in heat transfer in terms of total Nusselt number of the top and bottom hot components, which exhibited an improvement of 16.89% and 17.23% when the baffle height increases from h = 0 to h = 0.7. Additionally, the study found that reducing the distance between the baffle and the electronic components up to a certain limit can improve the heat transfer rate. Therefore, the optimal height of the baffle was found to be no lower than 0.6, and the recommended distance between the heaters and the baffle was 0.5. Originality/value This study provides valuable insights into the optimization of the design of baffled channels for improved heat transfer performance. The findings of study can be used to improve heat exchangers and cooling systems in various applications. The use of Cu-H2O nanofluid under mixed convection and laminar flow conditions in channel with baffle and electronic components is also unique, making this study an original contribution to the field.

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Section: Introductionmentioning

confidence: 99%