排除人员活动区内人体释放污染物的有效通风方式——置换通风
Displacement ventilation: efficient removal of contaminants released by human in the occupied zone
摘要：
分析了置换通风和混合通风的原理。基于气流分布特性和双层模型理论，比较了这两种通风方式的排污能力。对办公室、会议室及体育馆置换通风系统的通风效率进行了实测。结合人体释放污染物的气流运动特性，指出以排除人员活动区内人体释放污染物为目的时，置换通风较混合通风更为有效。
关键词：置换通风,混合通风,人员活动区,人体释放污染物,排污效率
Abstract：
Analyses the principles of displacement ventilation and mixing ventilation. Based on air distribution characteristics and the double-layer model theory, compares contaminant removing capability of the two ventilation modes. Measures the ventilation efficiency of the displacement ventilation systems for an office room, an assembly room and a gymnasium. Based on the movement characteristics of the contaminants released by human, points out that displacement ventilation is more efficient than mixing ventilation when aiming at removing human contaminants released from the occupied zone.
Keywords:displacement ventilation, mixing ventilation, occupied zone, human body contaminant, contaminant removing efficiency