Field Study On Indoor Thermal Environment In Summer For Subway Carriage

With the progress of science and technology and the development of socialeconomy, the increasingly rhythm of life to a new type of the city, new traffic tool in thecity becomes more and more convenient. Because of the subway with these advantagesof safety, high speed, on time, energy saving, environmental protection, and largecapacity, replacing the traditional bus to become the new mainstream of urban traffic.But with the wide application of subway in each city, in the process of running alsoshow some defects, such as the summer heat, the temperature is too low, often occurs inthe subway car wind speed is too large, the same subway line hot and cold unequalphenomenon, cause the discomfort of passengers, as most people complain that thesubway problem, a serious impediment to the subway development. Therefore, to find away let passengers feel comfortable in the thermal environment is an importantdirection in the development of the subway.In this paper, subway lines of four city as the research object. Subjectivequestionnaire combined with field test method objective thermal environment are usedto the car under the condition of thermal environment in the summer, concrete researchcontent is as follows.First of all, according to the theoretical foundation of the human body thermalcomfort. What factors affect the human body thermal comfort through analysis underthe environment of subway car, choosing the suitable evaluation index of the subwaycar thermal environment as to provide theoretical basis for the later data processing.Then, the experimental program of thermal environment of the summer wasdetermined through the investigation of the case of the four city subway, according towhich the thermal environments of Shenyang, Beijing, Shanghai and Guangzhousubway were tested and researched on the spot. And questionnaire for subway riderswere specifically designed.At the end of the experiment, through the analysis of thermal comfortquestionnaire of the subway passengers, we can get the passengers subjective evaluation of the thermal environment in subway car, and according to the calculation of theneutral temperature and thermal acceptable rate, we can get the thermal comforttemperature range of subway car which the passengers think about. At the same time,through to the field monitoring of the internal environment parameters in the subway car,we explore the distribution of actual thermal environment parameters in the runningprocess, and evaluate comfort degree of the thermal environment in subway carobjectively.