Research On Energy-Saving Technology For Auxiliary Buillding Of Expressway

The steady and rapid development of China's economy has led to the continuous expansion of social demand for transportation.In recent years,the energy consumption of the transportation industry has been increasing,and the proportion of the total energy consumption of the whole society has been increasing year by year.In order to maintain the expressway operation and management capacity and provide safe and efficient traffic level,the auxiliary housing of Expressway consumes a lot of energy.At the same time,due to the increasingly severe international energy situation,China as a big energy-consuming country,is facing enormous energy pressure from home and abroad.In order to improve the energy efficiency of auxiliary housing and build low-carbon transportation,this paper takes the auxiliary housing along the expressway as the research object,through investigation to understand the energy saving status of auxiliary housing along the expressway,and puts forward solutions to the energy consumption problem of toll booths.The main research work of this paper is as follows:Firstly,based on the background of Nanjing-Shanghai Expressway,this paper investigates the energy-saving status of auxiliary housing in Ningbo-Shanghai Expressway.Through on-site exploration,we can understand the real use situation and existing problems of high-speed auxiliary rooms;through the way of drawing consulting,we can understand the detailed structure of high-speed auxiliary rooms in Ningbo and Shanghai,and simulate the building energy consumption of representative auxiliary rooms through DeST software,so as to understand the energy consumption situation of existing auxiliary rooms more intuitively.The results show that most of the auxiliary buildings have shortcomings in building energy saving,among which the energy-saving transformation potential of toll booths is greater.Secondly,on the basis of the existing scholars'research on the mechanical properties of GFRP sandwich board,the GFRP square tube reinforced sandwich insulation board is used in energy-saving toll booth,and the heat transfer performance of GFRP square tube reinforced sandwich insulation board is studied through theory and experiment.The results show that the heat transfer coefficient of the square tube reinforced GFRP sandwich panels with three different filler materials,namely,glass cotton,extruded polystyrene board and polyurethane foam board,is 0.553W/(m~2·K),0.471W/(m~2·K)and 0.377W/(m~2·K),respectively,which meet relevant requirements of the thermal performance of the roof panel in hot summer and cold winter zone.Finally,based on the thermal performance of GFRP square pipe reinforced sandwich insulation board,polyurethane was selected as insulation filling material,and an energy-saving toll booth was designed.Through thermal environment simulation and energy consumption simulation,the thermal insulation and energy-saving performance of the energy-saving toll booth was studied,and compared with the traditional toll booth.The results show that the average temperature of the working area in the energy-saving toll booth is 21.863 under the conditions of outdoor-4.5 and indoor-26 C,which has better thermal comfort compared with the traditional toll booth.At the same time,compared with the traditional toll booth,the energy-saving toll booth can save 32.19%of the air-conditioning energy consumption.