Numerical-experimental study of mixed convection in a wind tower-room system

Carreto-Hernandez, L.G.; Moya, Sara L.; Varela-Boydo, C.A.; Francisco-Hernandez, A.

doi:10.1016/j.buildenv.2023.110294

Cited by 5 publications

(1 citation statement)

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“…A compelling illustration of natural ventilation can be found in windcatchers, which have received significant attention in recent years due to their remarkable capacity to take in a considerable amount of fresh air while simultaneously expelling stale air from inside buildings. Windcatchers rely on two primary mechanisms to ventilate interior spaces: buoyancy forces, stemming from temperature disparities between the indoor and outdoor environments, and wind forces, attributed to pressure differentials across openings [12,13]. The concept of windcatchers dates back centuries to the Middle East [14].…”

Section: Introductionmentioning

confidence: 99%

The Windcatcher: A Renewable-Energy-Powered Device for Natural Ventilation—The Impact of Upper Wing Walls

Nejat,

Fekri,

Sheikhshahrokhdehkordi

et al. 2024

Energies

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In recent years, there has been increased interest in natural ventilation solutions as a means to achieve sustainable and energy-efficient building design. Windcatchers, ancient Middle Eastern architectural elements, have surfaced as viable passive cooling devices in modern architecture, thereby enhancing interior air quality and reducing the reliance on mechanical ventilation systems. Integrating upper wing walls (UWWs) is hypothesized to augment a windcatcher’s effectiveness by optimizing wind capture, air circulation, and thermal regulation. Therefore, this study aimed to explore the influence of incorporating a two-sided windcatcher with UWWs, with a particular emphasis on the effect of the UWW angle on ventilation performance within building spaces. To achieve this aim, a series of numerical simulations were conducted to assess the synergy between the windcatcher and the wing wall configuration with varying UWW angles and under varying wind speed conditions. As the first step of the research methodology, the CFD model was validated through a comparison between the numerical results and the experimental data. The findings showed good agreement between these methods. In the next phase, windcatchers with different UWW angles spanning the range of 0° to 90° were subjected to rigorous evaluation. The results revealed that the configuration with a 30° angle exhibited the optimal performance concerning critical ventilation parameters encompassing the airflow rate, air change rate, and mean age of air. Finally, the selected configuration underwent an evaluation under diverse wind speed conditions, which affirmed that even under low-wind-speed conditions, the windcatcher provides ventilation levels that align with the standard requirements.

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Section: Introductionmentioning

confidence: 99%