大型商场竖直温度梯度的改善方法研究
Research on improvement of vertical temperature gradient in large shopping malls
摘要：
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。
Abstract：
In winter, thermal pressure in large shopping malls promotes the heat air rising from the bottom of the layer, forming a large vertical temperature gradient, which causes the hot in top and cold in bottorn and thermal discomfort. Combining temperature measurement in a shopping mall in Nanjing with CFD numerical simulation, presents a new method to reduce the vertical temperature gradient in large shopping malls. The measured results show that the vertical temperature difference is reduced from 3.8 ℃ to 1.3 ℃ by adopting the air adjusting control. Numerical simulation results show that the vertical temperature difference is reduced from 3.1 ℃ to 0.6 ℃ by reducing the top air supply, increasing the bottom air supply, and installing the baffles on the first layer, which effectively improves the uniformity and comfort of the indoor temperature.
Keywords:largeshoppingmall,temperaturegradient,improvement,airflowcontrol,baffle