超高层建筑外微气候参数垂直变化的实验研究

Experimental Research on Vertical Variation of Microclimate Parameters in the Super High-Rise Building

通过对某超高层玻璃幕墙建筑外表面的微气候参数的监测,发现高度是影响各参数垂直变化的主因。随着高度的增加,温度和湿度的变化均呈多"S"型变化,且为互补,顶层的温度较高而湿度最低;11∶00时建筑外表面垂直温差最大为6.7℃,而16∶00时垂直温差最小为0℃,测量时间段内平均垂直温差为2.7℃。随着高度的增加,建筑外表面的贴附气流速度逐渐增加,直至顶层有所回落,在建筑高度85%左右的平均风速最大,约为地面风速的7倍。温湿度和风速之间存在相互影响,较大的风速可以强化热湿交换,利于湿热地区夏季的通风降温和除湿。

It＇s observed that the height is a major reason for vertical variation of microclimateparameters by continuous monitoring of the super high-rise glass curtain wall building： With the increase ofheight, the changes of both temperature and humidity present multi-S type and they are complementary. Theroof has a higher temperature but lower humidity. The maximum, minimum and average vertical temperaturedifferences are 6.7 ℃（obtained at 11：00）, 0 ℃（Obtained at 16：00） and 2.7℃ respectively. The vertical windvelocity outside the building increases always and decreases at the roof. The maximum wind speed appearsin the 85% height of building, which is approximately seven times of suface wincl speed. Temperature,humidity and speed velocity humive interactions. A higher wind velocity will enhance the heat and moistureexch（mge, which favors condensation and dehumidification by ventilation for hot and humid areas.