Thermal Comfort Analysis Of The Application Of Evaporative Cooling Technology In The Station Waiting Area

During past few years,the contradiction between the high density of the waiting crowd and the air quality of the station is becoming obvious gradually.Traditional station waiting area usually adopt mechanical refrigeration cooling way which energy consumption and often lack fresh air and discomfort.Evaporative cooling air conditioning technology has the characteristics of saving energy and reducing consumption,mainly used in power plants,data center,subway,some industrial fields such as textile,foundry and civil fields such as public buildings and residential buildings.And in these already into the practical application of engineering,often ignored the thermal comfort of evaporative cooling technology.Waiting area,especially large public buildings and station,evaporative cooling technology is not very popular,thermal comfort on it is also little research and discussion.Therefore,in this paper,the application of evaporative cooling technology in the station waiting area is explored.Thermal comfort evaluation method,such as questionnaire survey,field test method and PMV-PPD method was adopted.Based on the SPSS analysis method,a questionnaire investigation was made on the thermal comfort of the human body in several typical public transportations,waiting areas,railway stations and bus stations.The reliability and validity analysis of thermal sensation evaluation using SPSS software was carried out.The correlation of comfort evaluation is analyzed,and the linear equation of thermal comfort and quantity thermal comfort under different environment and cooling mode is presented.First of all,the characteristics of the station and waiting area are summarized,and the evaluation indexes and methods of human thermal comfort in domestic and abroad are summarized and analyzed.Classification and comparison of the forward-looking and commonly used thermal comfort analysis methods,including the application scope,application sites,evaluation results and so on.Thermal comfort methods for the application of evaporative cooling technology in the station waiting area are summarized,including:PMV-PPD evaluation method,standard effective temperature and relative thermal index(RWI)and thermal comfort evaluation methods for evaporative cooling method based on exergy analysis.Secondly,the research on the practical application of evaporative cooling technology in the station is discussed.Starting from the traditional station ventilation and air conditioning system form and characteristics,analyzes their advantages and disadvantages,combined with the actual engineering case application of evaporative cooling technology in domestic and abroad confirmed: the application of the technology to the station waiting area is feasible.Then,according to the three different types of refrigeration station in Xi’an region by traditional mechanical cooling thermal comfort is measured and analyzed for comparison,the results show that the whole 3 station waiting room temperature slightly low,human comfort tend to "comfortable cool feeling".Among them,the Xi’An North Railway Station passenger comfort and a sense of the highest,followed by the Xi’an Metro,Xi’An Railway Station cold thermal comfort is the worst.And Xi’An Railway Station,a little cooler and slightly warmer passengers accounted for the highest percentage.For the 3 stations,the temperature range corresponding to the 80% acceptable: Xi’An Railway Station(24.45-30.6 ℃),Xi’An North Railway Station(24.6-27.5 ℃),the Xi’an subway station(22.5-24.5 ℃),but on the whole,the thermal comfort of mechanical refrigeration is only about 50%.Finally,the application of evaporative cooling technology in 6 practical engineering is tested and the research is carried out.The high pressure cold fog cooling and evaporative cooling air unit,air conditioner cooling way to focus on research.The cooling effect of the evaporative cooling technology in four different types of station waiting areas and the corresponding thermal comfort of passengers were obtained.The evaluation of thermal comfort of human body is classified,and the reliability and validity of the thermal comfort of human body are analyzed by using SPSS method.Under the premise of ensuring effective,put forward the human thermal comfort scale structural exploration,the number of human thermal comfort F1 and the quality of the human body thermal comfort F2 dimensionless two-dimensional linear equation.The correlation analysis was made on the correlation analysis of cold and hot sensation,dryness sensation and air blowing,and the human body thermal comfort in different station waiting area was verified by evaporative cooling technology.