Study on Influence of Occupancy Rate on Energy Consumption of Air-conditioning and Oxygen Generation Systems in Qinghai—Tibet Train

被引：0
|
作者：
Zhao X. [1 ]
Wang Y. [1 ,2 ]
机构：
[1] School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou
[2] Key Laboratory of Railway Vehicle Thermal Engineering, Ministry of Education of China, Lanzhou Jiaotong University, Lanzhou
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2023年 / 45卷 / 10期
关键词：
air quality; air-conditioning and oxygen generation energy consumption; occupancy rate; Qinghai—Tibet railway train;
D O I：
10.3969/j.issn.1001-8360.2023.10.007
中图分类号：
学科分类号：
摘要：
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, CO2 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 CO2 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”. © 2023 Science Press. All rights reserved.
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页码：60 / 70
页数：10
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