中学教室内新风量指标探讨
Discussion on outdoor air rate index in middle school classrooms
摘要：
我国教室以自然通风为主，间歇式开窗手段不能完全解决教室内新风量不足导致的二氧化碳（CO2）浓度超标的问题。通过工程案例分析了中学教室内CO2浓度和新风量的关系，并通过实验数据验证了均匀模型理论计算的可靠性。对比了目前我国各标准中对教室内CO2浓度限值和最小新风量的规定，指出了其中存在的分歧，建议加强基础研究、协调相关标准。通过对比不同标准发现，人员密度较高（大于0.4人/m2）时，按照GB 50736—2012《民用建筑供暖通风与空气调节设计规范》规定的最小新风量计算，教室内CO2浓度值最低。
Abstract：
Natural ventilation is usually acquired in the classrooms in China. Such method cannot provide enough outdoor air rate under certain situation so that the carbon dioxide (CO2) concentration often exceeds the limit. Analyses the relationship between the CO2 concentration and the outdoor air rate with an engineering case, and validates the calculation strategy with the experimental data. Compares the provisions of CO2 concentration limit and minimum outdoor air rate of the classroom in different standards of China, points out their differences, and recommends strengthening basic researches and coordinating relevant standards. By comparing different standards, finds that the minimum outdoor air rate in the standard GB 50736-2012 Design code for heating ventilation and air conditioning of civil buildings could yield the lowest CO2 concentration of the classroom when the occupant density is higher than 0.4 person per square meter.
Keywords:carbondioxide,minimumoutdoorairrate,standard,middleschoolclassroom,concentrationlimit