Research On Waiting Hall Of Elevated Railway Station Design In Cold Region Based On Natural Ventilation In Transition Season

In the transitional season of cold regions,using natural ventilation to improve indoor air quality is the best way to improve indoor thermal comfort.In recent years,due to comprehensive factors such as functional requirements and land saving,elevated waiting hall has become the main form of new large railway passenger stations in China.Its spatial characteristics provide great possibilities for the organization of natural ventilation.Through a large number of investigations on the cold elevated waiting hall,this paper summarizes the ventilation principle and influencing factors of the cold elevated waiting hall,classifies the different characteristics of the elevated waiting hall and establishes various types of standard models,analyses the natural ventilation potential of various types of waiting hall,and obtains the natural ventilation simulation parameters group of the cold large railway station elevated waiting hall.Firstly,the characteristics of the cold waiting hall are summarized according to the investigation.The models of different body characteristics are established in Airpak to study the influence of the body characteristics of the cold waiting hall on thermal comfort and natural ventilation.Secondly,according to the different occlusion conditions on the side of the cold waiting hall due to the climate characteristics and functional requirements,the models are established,and the research is carried out from the aspects of the interface opening area,the area ratio of intake and exhaust air outlets,the distribution of side shops,the height difference between side windows and skylights,and the strategies of thermal comfort and natural ventilation are put forward according to the different interface characteristics of the waiting hall.Aiming at the waiting hall with fully shielded side interface and combined with the space and thermal environment characteristics of elevated railway passenger station,this paper puts forward a method of hot-pressure ventilation,which directly introduces outdoor air from the truss layer by using the special permeable truss layer structure under it,using air under the viaduct as the cold air source,and combining with the uniform air inlet on the ground,and aiming at the different number and distribution of additional air outlets on the ground.Cloth,the indoor thermal environment is simulated by Airpak software simulation software,and the effectiveness and rationality of the method are analyzed.According to the different types of elevated waiting hall in cold regions,the design countermeasures of improving the thermal comfort of elevated waiting hall in cold metro station by natural ventilation in transitional season are put forward.It not only improves indoor air quality,meets comfortable requirements,but also saves energy.In order to direct the natural ventilation of the elevated waiting hall of the cold Metro Road passenger station under thermal comfort.