Group 1 - The core viewpoint of the articles is that the reported CO2 concentration levels in high-speed train carriages do not exceed safety standards set for passenger trains in China, which is a misunderstanding based on different regulatory standards [1][2] - The standard limit for CO2 concentration in China's passenger trains is set at a maximum of 2500ppm under normal operating conditions, according to TB/T 3493-2017 [1] - In comparison, European standards allow for a maximum CO2 concentration of 5000ppm for passenger trains as per EN13129-2016 [1] Group 2 - The train sets are designed with a fully airtight body, and the air exchange is managed entirely by the air conditioning ventilation system, providing an average fresh air volume of over 15m³/h per person [2] - The air exchange rate is between 6 to 12 times per hour, and the trains are equipped with a pressure protection system to manage air quality [2] - During operation in non-tunnel sections, CO2 concentration typically does not exceed 1500ppm; however, in tunnels, the pressure protection system may temporarily increase CO2 levels without impacting passenger health [2]
我国旅客列车室内二氧化碳浓度标准限值为2500ppm 限值内浓度对旅客健康无影响
Yang Shi Wang·2026-01-24 05:04