摘要
为探索青藏线空调列车在夏季行驶过程中不同乘客上座率时空调与制氧系统的节能运行模式,在考虑车体围护结构非稳定传热的基础上,建立25T型高原列车内物理场与热舒适数值计算模型,分析不同上座率与不同空调运行模式下车厢内温度场、流场、CO_(2)分压力场的分布特性以及空调和制氧总能耗。结果表明:新风量大小对空调与制氧能耗的影响呈相反趋势,对制氧能耗影响显著,空调能耗在总能耗中占比较小。乘客上座率下降导致新风需求减小,引起空调能耗增加,制氧能耗降低,总能耗降低。低上座率时就座方式对车内温度场、CO_(2)分布均产生一定的影响,相同上座率条件下合理的就座位置可改善乘客周围局部热环境与空气品质。本文提出的根据乘客上座率适时调节送风参数以降低空调和制氧能耗的措施,可同时满足“车内空气品质、热舒适、节能”三者的协调统一。
In order to explore the energy-saving operation mode of the air-conditioning and oxygen generation systems under different occupancy rates during the train running on the Qinghai—Tibet line in summer,considering the unsteady heat transfer of the train enclosure structure,a numerical calculation model was established for the physical field and thermal comfort of the 25T plateau train,to analyze the distribution characteristics of the temperature field,flow field,CO_(2)partial pressure field in the train under different occupancy rates and different air-conditioning operation modes,as well as the total energy consumption of the air-conditioning and oxygen supply systems.The results show that the fresh air volume has an opposite effect on the energy consumption of the air-conditioning and the oxygen generation systems,with a significant impact on the energy consumption of the oxygen generation system,while the air-conditioning energy consumption accounts for a relatively small proportion of the total system energy consumption.The decrease in passenger occupancy rate reduces the demand for fresh air volume,which leads to an increase in the energy consumption of air conditioning,a decrease in the energy consumption of oxygen generation and a decrease in the total energy consumption of the systems.At a low occupancy rate,the seating mode has a certain impact on the temperature field and CO_(2)distribution in the train.A reasonable seating position under the same occupancy rate can improve the local thermal environment and air quality around the passengers.The measures proposed in this paper to adjust the air supply parameters according to passenger occupancy rate to reduce the energy consumption of air-conditioning system and oxygen generation system can simultaneously achieve the balance point of“air quality,thermal comfort and energy saving”.
作者
赵兴杰
王烨
ZHAO Xingjie;WANG Ye(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Key Laboratory of Railway Vehicle Thermal Engineering,Ministry of Education of China,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2023年第10期60-70,共11页
Journal of the China Railway Society
基金
国家自然科学基金(51476073,51266004)
甘肃省优秀研究生“创新之星”项目(2021CXZX-565)
甘肃省自然科学基金(21JR7RA304)。
关键词
青藏线列车
上座率
空气品质
空调及制氧能耗
Qinghai—Tibet railway train
occupancy rate
air quality
air-conditioning and oxygen generation energy consumption
