Study On The Influence Of Building Phase Change And Humidity Storage Wall On Indoor Comfort

With the main contradiction in our society has been transformed into the contradiction between the people’s growing needs for a better life and the unbalanced and underdeveloped development,we should adhere to the path of socialist ecological civilization.One of the more important ways is to use materials with passive adjustment ability to reduce building energy consumption to achieve energy conservation and emission reduction.This paper mainly prepares the phase change and humidity storage composites and reduces the use of heating,ventilation and air conditioning（HVAC）system and other auxiliary equipment to regulate the temperature and humidity of the indoor environment,improve to the comfort of the indoor environment,and create a comfortable and healthy indoor environment.In this study,SiO₂modified by silane coupling agent KH570 was selected as the inorganic wall material,and a strong interfacial layer was formed on the surface to prevent the droplets from being combined,which facilitated the uniform dispersion of the modified SiO₂in the solution.Firstly,the phase change materials Decanoic Acid（DA）and palmitic acid（PA）were selected as organic core materials.The phase change and moisture storage composites were prepared by ultrasonic assisted sol-gel method.Influence,the preparation mechanism and mechanism of action were analyzed by means of characterization.Then,it is mixed with gypsum to prepare gypsum-based phase change and moisture storage composite material.The office model is built by software.According to whether the gypsum-based phase change and moisture storage composite material is used,it is set as ordinary room and energy-saving room respectively.The simulated locations are selected as representative cities in different climate zones.Finally,the effects of gypsum-based phase change and moisture storage composites on indoor temperature and humidity in various regions were analyzed.The main contents and results of this study are as follows:（1）Ultrasonic action can effectively reduce the size and distribution of the particle size;when the ultrasonic power is 120W,the silane coupling agent is 4g,the temperature of the solution under ultrasonic action is 60℃,and the action time of the ultrasonic wave on the solution is 100min,the phase The particle size of the variable moisture storage composite is small and the concentration is concentrated;at this time,the relative humidity of 40%～65%is 0.1864～0.2379g/g,the phase transition temperature is 20.23～23.59℃,and the latent heat of phase change is 40.91～46.72J/g;at the same time has good stability.（2）The modified SiO₂-based DA-PA temperature-controlled and humidity-control composite material and gypsum are mixed to form gypsum-based phase change and moisture storage building materials,and the energy-saving room and ordinary house model are established through Design Builder software,and natural ventilation conditions are set.Guangzhou is the representative city in the hot summer and warm winter zone,Wuhan is the representative city in the hot summer and cold winter zone,Kunming as the representative city in the mild region,Xi’an as the representative city in the cold region,and Harbin as the representative city in the severe cold region.The area represents the temperature and humidity of the urban interior.（3）The simulation data analysis results show that the application of gypsum-based phase change and moisture storage building materials can effectively control the temperature and humidity and improve the indoor comfort.In the hot summer and warm winter areas,the temperature and humidity fluctuations of energy-saving houses are reduced by 0.37℃and 1.2%RH compared with ordinary houses;in the hot summer and cold winter areas,the temperature and humidity fluctuations of energy-saving houses are reduced by 0.19℃and 0.4%compared with ordinary houses.RH;in moderate areas,the temperature and humidity fluctuations of energy-saving rooms are 2.03℃and 6.2%RH lower than those of ordinary houses;in cold areas,the temperature and humidity fluctuations of energy-saving houses are0.12℃and 0.3%RH lower than ordinary houses;In the region,the temperature and humidity fluctuations of energy-saving rooms were reduced by 1.40℃and 6.4%RH compared with ordinary houses.