Investigation And Analysis Of Air Quality In Subway Carriage

Subway has the advantages of saving ground resources,carrying large passenger capacity,convenient,safe and environmentally-friendly.Thus,it has rapidly developed in various regions of China's in recent years.However,with the operation of the MTR,some problems about air quality in the subway carriage have appeared,such as the concentration of certain pollutants exceeded the standard limit,the passenger felt foreign odor,some passengers felt unwell.Passengers' travel was affected and the development of the MTR was hindered.Therefore,it is necessary to investigate and analyze the air quality in the subway carriage and put forward the feasible improvement measures.In this paper,subway carriages of typical cities in different climate areas in China as the research object,used the subjective questionnaire survey and the objective parameter test method,this paper investigated and analyzed the air quality in the winter and the summer in Shenyang,Beijing,Shanghai,Guangzhou and Kunming.The specific contents of this paper are as follows.First of all,according to the theory and research foundation of indoor air quality,combined with the characteristics of subway car itself,the paper analyzed the factors that affect the air quality in subway compartments,and determined the method and index of air quality evaluation.And provided the basis for the design of the questionnaire,the launch of the test and the data processing and analysis.Then,according to the current situation of subway distribution in China and the actual situation,the object of the study was determined and the outdoor air quality of each city was compared and analyzed.The subjective questionnaire survey and field test were used to investigate the air quality of subway carriages in different cities.Finally,the data were sorted out,and present situation of the air foreign odor,discomfort symptoms,passengers' satisfaction rate and some pollutants in different seasons,cities and lines were obtained.The subjective and objective evaluation index recommended value under the condition of passenger's subjective acceptability and satisfaction was provided,which applied in air quality of subway carriage,and provided reference for the formulation and implementation of relevant standards.