Numerical Simulation Analysis and Full-Scale Experimental Validation of a Lower Wall-Mounted Solar Chimney with Different Radiation Models

Sustainability, Journal Year: 2023, Volume and Issue: 15(15), P. 11974 - 11974

Published: Aug. 3, 2023

As a type of passive architectural structure, wall-mounted solar chimneys enhance the natural ventilation volume building’s interior, and maximize reductions in operational energy consumption. They are indispensable conservation emission reduction. Therefore, measuring chimney’s flow characteristics relevant index parameters is particularly important. This paper uses combination full-scale experiments numerical simulation to conduct detailed analysis chimney. Four different radiation models, namely DO (discrete ordinates), S2S (surface-to-surface), MC (Monte Carlo), Rosseland used for comparison, results compared with experimental data. The show that maximum turbulent viscosity fluid predicted by model higher than models 16.87% 8.44%, respectively. errors midline glass cover plate direction concerning only 0.33% 0.15%, mistakes these two directions 0.51% 0.47%, more suitable predictions related

Language: Английский

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CFD Analysis of Building Cross-Ventilation with Different Angled Gable Roofs and Opening Locations

Buildings, Journal Year: 2023, Volume and Issue: 13(11), P. 2716 - 2716

Published: Oct. 27, 2023

The geometric shape of the roof and opening position are important parameters influencing internal cross-ventilation buildings. Although there has been extensive research on natural ventilation, most it focused flat or sloping roofs with same positions. There is still limited impact different positions ventilation. In this study, computational fluid dynamics (CFD) was used to investigate air exchange efficiency (AEE) in general isolated These buildings encompassed three distinct configurations (top–top, top–bottom, bottom–top) six varying slope angles for gable (0°, 9°, 18°, 27°, 36°, 45°). Computational simulations were carried out using SST k-omega turbulence model, validation performed against experimental data supplied by Japanese AIJ Wind Tunnel Laboratory. Grid independence also conducted ensure reliability CFD simulation results. study revealed that highest AEE 48.1%, achieved top–bottom configuration a angle 45°. Conversely, lowest 31.4%, attained bottom–top 27°. Furthermore, observed when set top–top bottom–top, had minimal influence AEE, an average only around 33%. When found positive correlation between AEE.

Language: Английский

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Effects of internal wall design on cross-ventilation of an isolated building

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(5)

Published: May 1, 2024

Poorly designed internal walls deter natural ventilation of buildings, causing poor indoor air quality and exorbitant energy costs when mechanical systems are used. Although one can design with minimum adverse effects on by controlling height, width, location, porosity walls, less research has been done to date. This study investigated how these four parameters individually collectively influence the cross-ventilation buildings using Reynolds-average Navier–Stokes equation-based computational fluid dynamics simulations local global sensitivity analysis. When considering individual parameters, analysis revealed positive correlation between walls' cross-ventilation, similar previous studies. However, identified location as most influential parameter for cross-ventilation. Furthermore, nonlinear, non-monotonic, interactive relations cross all but porosity, highlighting importance evaluating together difficulty in extrapolating findings idealized actual wall designs. Based findings, this proposes narrow high porosities built away from openings a basic maximize buildings.

Language: Английский

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Tropical Building Sustainability and the Energy Regulations

Published: Aug. 21, 2024

Tropical regions face unique challenges in building sustainability due to high temperatures, humidity, and heavy rainfall. While energy regulations are essential for promoting efficiency, their effectiveness addressing tropical climate conditions needs be studied more. This research aims systematically investigate issues evaluate the impacts of on these challenges. The study will identify gaps current by analyzing existing recommend strategies developing more comprehensive frameworks that promote sustainable practices regions. contributes effective policies achieving energy-efficient built environments climates.

Language: Английский

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Integration of phase-change materials in heat recovery ventilator systems for enhanced thermal performance: Based on in-situ experiments

Building and Environment, Journal Year: 2024, Volume and Issue: unknown, P. 112452 - 112452

Published: Dec. 1, 2024

Language: Английский

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