横向通风隧道正常运营CO浓度限值计算

Predicting Permissible CO Concentration Limit for Transverse Ventilation Tunnels Under Normal Case

基于差分形式的用于计算一定环境CO浓度及暴露时间下人体血液中碳氧血红蛋白饱和度的Coburn-Forster-Kane方程(CFK方程),结合不同形式横向通风隧道CO浓度分布特性,拟合了适用于正常运营工况下CO浓度限值计算式,对于送风型半横向通风隧道给出事故通风CO浓度指示值计算式.计算结果显示全横向通风隧道与送风型半横向通风隧道可采用同一CO浓度限值,排风型半横向通风隧道可采用三倍该CO浓度作为限值.

Permissible CO concentration limits for three types of transverse ventilation tunnels were predicted by calculating under certain Carboxyhemoglobin（COHb） saturation level on the basis of CO concentration profile in tunnels and difference form of Coburn-Forster-Kane equation （CFK equation）. A fitting equation for predicting permissible CO concentration limits is presented for each kind of transverse ventilation tunnels. Furthermore, a fitting equation for air supply type semi-transverse ventilation tunnel for emergency ventilation is presented as well. The results show that the permissible CO concentration limits for transverse and air supply type semitransverse ventilation tunnels should be the same which is approximate 1/3 of the values for air exhaust type semitransverse ventilation tunnel.