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为研究外界气象条件对在高海拔缺氧地区运行的列车空调新风需求量的影响,以青藏铁路沿线实际气象参数和环境条件为基础,依据室内CO_2质量浓度平衡原理,计算弥散供氧方式下列车在不间地区的空调新风量调节值。结果表明,与选取固定室外温度(40℃)相比,选取极端最高温度时的新风量节约率最大值达5.37%。综合考虑高原列车车内正常人体生理循环所需氧浓度和良好的室内空气品质要求,提出了一种既能控制氧浓度又能保证室内污染物浓度不超标的确定空调新风量的新思路。本研究对青藏铁路列车空调系统的技术改进和运行管理提供了参考。
In order to study the influence of external weather conditions on the fresh air demand of train air-conditioners operating in high altitude and anoxic regions, based on the actual meteorological parameters and environmental conditions along the Qinghai-Tibet Railway, based on the principle of indoor CO 2 mass concentration balance, Air conditioning in the area of the new air volume adjustment value. The results show that, compared with the fixed outdoor temperature (40 ℃), the maximum fresh air saving rate reaches 5.37% when the extreme maximum temperature is selected. Considering the oxygen concentration and the requirement of good indoor air quality for normal human body physiological cycle in highland train, a new idea to determine the fresh air volume of air conditioning is proposed, which can not only control the oxygen concentration but also ensure the indoor pollutant concentration is not excessive. This study provides a reference for technical improvement and operation management of train air-conditioning system in Qinghai-Tibet Railway.