The effect of louver blinds on the wind-driven cross ventilation of multi-storey buildings

Jiang, Fujian; Tao, Shiwen; Tao, Qiuhua; Li, zhengrong; Yuan, Yanping; Zheng, Jianwen

doi:10.1016/j.jobe.2022.104614

Cited by 5 publications

(1 citation statement)

References 51 publications

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“…However, when the horizontal louvers are set in front of the building, with the wind attack angle increase, the CHTC of the façade will first rise up by about 40~50% and then decrease to about 60~70% of the CHTC with ϕ = 0 • . This growth of the CHTC of the façade may come from the decrease in louvers' barrier effect due to the change in ϕ from 0 • to 60 • , which was also concluded in the previous studies about wind ventilation [31]. With the ϕ increased from 0 • to 60 • , one edge of the façade will gradually change from the louvers' downstream to the upstream position parallel to the louvers.…”

Section: List Of Simulation Casessupporting

confidence: 73%

Investigation on Forced Convective Heat Transfer at the Building Façade with Louver Blinds under Different Wind Directions

Tao

et al. 2022

Buildings

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Exterior louver blinds are one of the most common shading devices attached to the building façade, which will not only screen solar radiation but also affect the flow around the building and change the convective heat exchange at the façade. To better understand how different wind directions affect the convective heat properties of louvered building façades, this paper conducted a CFD simulation with the validation of previous wind-tunnel experiments. A total of 63 shading cases and 7 unshaded cases were both investigated by simulations. It was found that with the increase in wind attack angle θ, the surface-averaged convective heat transfer coefficient (CHTC) at the louvered surface will first increase by about 40~50% (θ from 0° to 60°) and then be cut down by 60% (θ from 60° to 90°). In addition, the convective heat exchange rate at the louver slats will gradually decrease with the growth of θ. Finally, modifications for previous correlations were proposed to quantify the effect of wind directions on the CHTCavg at the blinds and façade, of which the maximum deviation for convective heat exchange rate is less than 18%.

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Section: List Of Simulation Casessupporting

confidence: 73%