北京地区居住建筑夏季自然通风实测研究

Field testing of natural ventilation of residential buildings in Beijing in summer

采用CO2示踪气体浓度衰减法,以北京市区8户住宅为研究对象,对卧室夜间通风情况进行了测试,得到了在不同门窗开关情况下的房间通风量。结果表明,在门窗关闭情况下空气渗透换气量较小,不能满足室内新风量的需求。分析了单侧通风情况下通风量与室内外温差、室外风速和风向的关系,并用实测值与Warren提出的经验公式的计算值进行了对比,结果显示当开窗位于侧风面和背风面时,计算值普遍高于实测值,应对经验公式进行修正。

Using the CO2 tracer gas concentration decay method, taking eight residences in Beijing region as research subjects, measures and obtains air changes through exterior windows in the bedroom at night under different open-closed conditions of door and windows. The results indicate that the air infiltration through the gaps of windows and doors can not satisfy the requirement of indoor air quality when the windows and doors closed. Analyses the relationship between the single-side ventilation rate and temperature difference of indoor and outdoor, outdoor wind speed and direction, and compares the measured ventilation rate with the results from the empirical formulas presented by Warren. The results show that when the windows opened are in the crosswind side or leeward side, the calculated values are basically lager than the measured values, and the empirical formulas should be modified.