封闭式汽车库通风量计算探讨
Discussion on ventilation calculation for enclosed garages
摘要：
分析了我国封闭式汽车库卫生标准及通风量的演变，发现尽管封闭式汽车库内CO允许质量浓度从100~200 mg/m3降到了30 mg/m3，但相关设计规范和技术措施中给出的排风换气次数基本未变。对文献中给出的通风量计算方法的计算结果差异很大、计算得到的风量最大值与最小值相差近11倍、且在引用和转引中出现众多纰缪的问题进行了分析。认为除去笔误外，风量计算的差异主要体现在单辆车CO排放量的取值不同，目前的取值并未反应出汽车污染物排放控制技术方面的进步，也不适应我国国情，导致封闭式汽车库排风量过大。
Abstract：
Analyses the improvement of hygienic standards and the ventilation rates of the enclosed garages in China, and finds that the allowable concentration of carbon monoxide in the enclosed garages has been reduced from 100200 mg/m3 to 30 mg/m3, however, the exhaust air change rate provided by relative design codes and technical measures remains basically unchanged. Aiming at the problems including the results of ventilation rate calculation methods given in the literatures varying widely from one to another, the maximum value of the calculated air volume reaching even about eleven times of the minimum value, and the quotes and quotes from the secondary sources also bringing many errors, gives the correct calculation methods. Considers that the differences of the calculated air volume mainly embody in the carbon monoxide emissions of each car, regardless of the writing errors. The values widely used neither reflect the progress of the vehicle pollutant emission control technology, nor adapt to the current situation, which lead to the larger exhaust air volume.
Keywords:enclosedgarage,ventilationrate,exhaustairchangerate,carbonmonoxideemissionrate,calculationmethod