高大空间热分层实测与热压通风冷却潜力

以南京某大空间建筑为对象,长45 m、宽15 m、高16 m,在9月过渡季连续多日测试了自然通风状况下的室内温度分布,发现同一垂直方向上温度的线性化程度较好,梯度在0.2℃/m左右,且随室外气象条件变化而变化。采用热压通风效应模型,计算了南京、武汉、重庆、广州4个不同夏热地区全年各月的热压通风量及满足基准通风量要求的最小上部开口面积与通风排热量。利用Energy Plus能耗软件模拟全年各月热压通风热舒适时数,发现广州地区具有最好的热压通风节能潜力。

Field Measurements on Thermal Stratification and Predicting on Cooling Potential of Thermal Pressure Ventilation for Large Space

For a large and high laboratory building in Nanjing, indoor temperature distributions under natural ventilation were tested during several days on September, and its linear degree was found to be good in any a vertical direction, also its gradient was about 0. 2℃/m and varied with outdoor weather. By using the thermal effect model, the ventilation rates of each month were calculated out for cities of Nanjing, Wuhan, Chongqing and Guangzhou, also the minimum upper opening areas and heat exhaust rates were decided which satisfied with the benchmark ventilation rate. With energy simulation tool EnergyPlus, hours of thermal comfort of each month were modeled, and the founding was that Guangzhou has the best energy saving potential of thermal pressure ventilation.