Wind Pressure Coefficient on a Multi-Storey Building with External Shading Louvers

Abstract

Wind characteristics on building surfaces are used to evaluate natural ventilation of a building. As a type of building component, external shading louvers are applied in hot climatic regions to block solar radiation and provide better visual environments. The structure of external louvers can affect wind-induced characteristics, such as convective heat transfer coefficient, wind pressure and pollutant dispersion around building envelopes. This paper aims to analyze the potential ventilation capacity of a multi-storey building with shading louvers, based on wind pressure coefficient by the numerical method. A reference case was established and a previous study was applied to validate the numerical results. The rotation angle of horizontal louvers is taken from 0° to 75° in the simulation cases. The results show that average wind pressure has the greatest reduction for all floors when rotation angle turns from 60° to 75°. Ventilation openings on the stagnation zone contribute to higher ventilation rates for the windward facade with louvers. The analysis, based on multi-floor and multi-row buildings under shaded conditions, will provide a greater perspective for engineers to make optimal natural ventilation routes in multi-storey buildings with external shading louvers.

CFD Modelling and Analysis for Green Environment of Traditional Buildings

“…The wind speed at the bottom of tall buildings is minimal, the wind direction on the lee side is lower, and the wind speed on the lee side is lower. As the wind increases, the wind environment on the leeward side of the high-rise building and the building combination depend more on the height and plane of the building itself [45][46][47][48]. Elevation wind map Table 3.…”

An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N

“…Shading elements and their influence on building energy requirements were studied by Palmero-Marrero and Oliveira [39], Gratia and De Herde [40] and Manzan [41]. Usually, different forms of louvers and blinds are used in different positions and locations in relation to the window (e.g., by Atzeri et al [42] and Zheng et al [43]). For example, Alzoubi and Al-Zoubi evaluated the performance of vertical and horizontal shading devices for south-exposed façades in a dry climate.…”

An Evaluation of Annual Luminous Exposure from Daylight in a Museum Room with a Translucent Ceiling

“…Palmero-Marrero and Oliveira [42], Gratia and De Herde [43], and Manzan [44] have studied the shading elements and their influence on building energy requirements. In general, various types of blinds and louvers are used in different configurations (e.g., by Atzeri et al [45], Zheng et al [46]). From the perspective of the current study, vertical and horizontal shading devices were analyzed by Alzoubi and Al-Zoubi [47], but only for south exposed façades in a dry climate.…”