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在冬季,大型商场内的热压作用促使位于其底层的热空气上升,形成较大的竖直温度梯度,造成上热下冷、热舒适度差等问题。结合南京某商场温度实测分析与CFD数值模拟,提出了大型商场竖直温度梯度的改善方法。案例实测结果表明,采取风量调节控制后竖直温差由3.8℃减小至1.3℃。数值模拟结果表明,减少顶层送风量、增加底层送风量,并在1层设置挡温构件后,竖直温差由3.1℃减小至0.6℃,有效提高了室内温度均匀性和舒适度。
In winter, the hot pressure in the shopping mall causes the hot air located on the bottom of the shopping mall to rise, resulting in a large vertical temperature gradient, causing problems of overcooling and poor thermal comfort. Combined with temperature measurement analysis and CFD numerical simulation in a shopping mall in Nanjing, a method to improve the vertical temperature gradient in large shopping malls is proposed. The measured results show that the vertical temperature difference decreases from 3.8 ℃ to 1.3 ℃ after taking the air volume control. The numerical simulation results show that the vertical air temperature decreases from 3.1 ℃ to 0.6 ℃ after reducing the amount of air in the top floor and increasing the amount of air supply in the ground floor.