Summer Thermal Environment Research In Jiayuguan Railway Station

The Lan-Xin second double path east begins in Lanzhou, along through Xining, Zhangye, Jiuquan, Jiayuguan, Hami, Turufan, ends at Wurumuqi. These way stations are located in the cold or severe cold region, which perennial temperature is lower, and the temperature gap between day and night is large. Therefore, on the indoor environment control, heating in winter becomes the main consideration, and for summer, natural ventilation is the main way, and the central air conditioning system isn’t considered. But problem that if pure natural ventilation way can meet the comfortable requirements of people in the waiting room should be discussed.Therefore, in this paper, the Jiayuguan railway station is seem as the research object, which indoor thermal environment under the natural ventilation conditions in summer will be investigated by the way of the combination of the field testing and questionnaire survey.The results show that the summer thermal environment of the Jiayuguan railway station waiting room is bad under the condition of natural ventilation, not within the scope of the comfortable provisions. Through statistical analysis of the survey data of field test, we get the linear regression curve of prediction mean thermal sensation vote (PMV) and thermal sensation vote (TSV) on indoor temperature, the result of two regression under the curve be compared, and the differences between station buildings and residential buildings are also expounded. On the basis of comparison, PMV model is modified.Based on the natural ventilation mode can’t meet passengers summer thermal comfort requirements. In this region, combining with space temperature stratification phenomenon and space structure logic, this paper puts forward the mechanical exhaust way which is based on the top row of mechanical ventilation to solve the indoor thermal environment problems, and from the point of view of the airflow organization, the application and optimization of mechanical ventilation based on the top row in the south Jiayuguan railway station will be highly researched by software Fluent, and the mechanical ventilation air distribution will be evaluated by non-uniform coefficient and the air distribution index characteristics (ADPI). The simulation results show that the waiting room indoor thermal environment basically can satisfy human thermal comfort requirements after using mechanical ventilation based on at the top of the line mode.Through the analysis of influence factors of indoor airflow organization, it is concluded that the size and the number of the vents have little influence for the waiting room personnel work area thermal environment. In addition, the effect of thermal comfort in waiting room personnel work area also be analyzed by reducing exhaust air, and seek out the economic exhaust air which not only satisfy human thermal comfort and also save energy. At the same times, the energy consumption between mechanical ventilation mode and traditional air conditioning mode is made a simple contrast analysis.