Research On Thermal Comfort Analysis And Optimization Design Of Elevated Metro Station In Cold Region

As an important form of construction of subway stations,elevated stations are widely used in subway planning and design due to their advantages of low investment and simple construction.However,the light composite composite structure usually adopted by the elevated station not only has weak resistance to temperature fluctuations,but also has a large number of thermal bridge heat conduction problems;its open space design of the station platform not only seriously affects the waiting environment and passengers in the station.The thermal comfort feels while also increasing energy consumption.At present,research on subway transportation buildings at home and abroad mainly focuses on underground stations.The thermal environment of elevated stations and its improvement methods need to be studied.Therefore,this paper conducts systematic thermal comfort field investigation for typical elevated stations,masters the thermal comfort laws of different seasons in cold regions,explains the thermal adaptation mechanism,and gives comfortable temperature for the investigated population and building environmental conditions.This will provide a basis for the rational formulation or further improvement of the thermal comfort standard of the elevated station.Firstly,taking Tianjin as an example,a combination of on-site questionnaires and field tests is used.In the winter and summer,the indoor and outdoor environmental parameters of the existing elevated station in Tianjin were tested in the field.Combined with the subjects’ subjective evaluation of the waiting environment,the basic conditions of the elevated environment of the elevated station were understood and mastered.Secondly,a typical subway elevated station was selected to conduct in-depth analysis of the thermal comfort of different areas of the elevated public areas,different evaluation units and different time periods in the day by on-site testing and questionnaire survey.Through the analysis of the thermal comfort of the elevated station in Tianjin,the overall situation of thermal comfort was studied,and the reasons,location and time of the poor thermal comfort of the elevated station were analyzed,and the thermal comfort temperature was proposed by the thermal comfort model.Thirdly,according to the analysis of the thermal comfort problem of the elevated station,specific solutions and comprehensive transformation plans are proposed for the enclosure structure,glass curtain wall,screen door and other facilities,and the specific solutions and comprehensive transformation plan proposed by Ecotect software.Perform a simulation comparison.In this paper,the research results of thermal comfort evaluation for semi-open platform space have a certain complementary effect on the thermal comfort evaluation of building environment.The relevant conclusions can provide some reference for the revision of related engineering design,planning and management institutions and related standards for subway and light rail.To help improve the thermal environment of the subway station and improve the passenger’s thermal comfort.At the same time,it helps to improve people’s negative emotions caused by poor comfort during the waiting time,thus alleviating the negative psychology of passengers’ irritability and anxiety during waiting,and effectively maintaining social harmony and stability.