射流风机纵向通风隧道怠速运营CO 浓度限值讨论.pdf

文档介绍：射流风机纵向通风隧道怠速运营 CO 浓度限值讨论

叶蔚,张旭

(同济大学暖通空调及燃气研究所,上海 200092)

摘要隧道通风稀释 CO 的目的为保证隧道内卫生条件。我国现行规范《公路隧道通风照明设计规范》
(JTJ -1999)(以下简称《规范》)对隧道阻滞工况 CO 浓度限值的设定思路与国际主流标准存在差异,
且存在一定缺陷。CO 对人体造成危害的程度主要取决于环境 CO 浓度及人体暴露时间。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 COHb 饱和度的 Coburn-Forster-Kane 方
程(CFK 方程),结合射流风机纵向通风隧道 CO 浓度分布特性,拟合了怠速运营工况 CO 浓度限值计算
式。并推荐在该式中使用相对较大的 COHb 饱和度指标进行计算。
关键词射流风机,纵向通风隧道,CO 浓度,CFK 方程

Predicting Permissible CO Concentration Limit for
Longitudinal Ventilation Tunnels with Jets under Hurdle Cases

YE Wei, ZHANG Xu
(HVAC & Gas Research Institute, Tongji University, Shanghai 200092, China)

Abstract Ventilation in tunnels can dilute CO concentration for hygienic concerns. The current code
Specifications for Design of Ventilation and Lighting in Highway Tunnel in China which may have shortages lists
the admissible CO concentration limits for longitudinal ventilation tunnels with jets and varies from international
standards both on values and principles. CO can cause damages to human based on exposure, both the
concentration and time take into account. Permissible CO concentration limits for longitudinal ventilation tunnels
with jets under hurdle cases was predicted by calculating under certain carboxyhemoglobyne(COHb) saturation
level using CO concentration profile in tunnels and difference form of Coburn-Forster-Kane equation