Rothoblaas - 胶带、密封剂和网 Page 166
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FRAME2054
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通风设计 烟囱效应是什么? 为了确保热气球能够飞行并克服重力,需要降低内部的空气密度。如何?加热。 热气球内空气的密度低于外部空气的密度,气球将慢慢上升。 在通风的屋盖中也会发生同样的现象,被称为“烟囱效应”。 通风是如何发生的 1. 太阳辐射加热仰合瓦。下方的空腔充当“气垫”,防止热量直接传递到瓦下面 的屋面上。 2. 通风室内的热空气比照射前的空气密度低,它会向上上升,同时受到从屋檐 开口进入的外部空气的推动。 3. 因此,空气从屋脊中出来并与周围环境混合。这会在空腔内产生低压,使其“ 排空”室内的较低压力会导致外部的空气再进入室内。 4. 从屋脊线中出来的空气会在空腔中产生低压,从而导致外部未加热的空气被 吸入空腔内。 166 | 通风和屋盖 | 屋顶和 通风 部件
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