Effect Of Indoor Porous Hygroscopic Material On Environmental Humidity And Energy Consumption

Humidity is one of the important indicators of indoor environment.It not only affects human thermal comfort and indoor air quality,but also affects the durability of building structure and the service life of indoor furniture.For the middle and lower reaches of the Yangtze River in China,the hot and humid climate is significant,the latent heat load is large,and the dehumidification demand is high.However,the conventional air conditioning condensing and dehumidifying will cause a large amount of unnecessary energy waste.Under the concept of energy saving and emission reduction in China,balancing the relationship between the human body’s requirements for indoor heat and humidity and energy consumption has become one of the important research directions.As a passive technology,porous hygroscopic material does not require energy and other mechanical equipment to assist,but its regulation and energy saving effect have close ties with indoor environment and its use,including indoor ventilation,building envelope structure,indoor moisture content.Just attaching the material to the wall and using it without manual control does not give you the advantage of the hygroscopic material.However,the existing research has paid too much attention to the properties of the porous hygroscopic material itself,ignoring the influence of the actual use mode on its hygroscopic ability.Therefore,this paper studies the effect of humidity-conditioning materials on indoor temperature and humidity from the perspective of practical application conditions,in order to guide the scientific use of porous humidity-conditioning materials in the future.In this paper,the effect of porous hygroscopic materials on indoor humidity was studied experimentally.The experimental research part takes wool insulation material as the representative object and analyzes its adjustment effect under different working conditions.The working condition design is mainly divided into three categories according to different wet ways in the room:moisture transmission in the envelope structure,wet ventilation(ventilation and airflow organization)and wet source moisture(wet source wetted area and different humidity intervals).Subsequently,the typical working conditions were selected,and the wool insulation materials were compared with the plasterboard and the plywood.The characteristics were analyzed.The experimental results show that in addition to the moisture transmission of the envelope structure,the design factors in both the ventilated wet and the wet source wet heat have an effect on the adjustment effect of the wool thermal insulation material on the indoor temperature and humidity,and summarize the relevant use principles.The comparative experiment of the three found that the wool insulation material has the best effect on the adjustment of the temperature and humidity in the cabin,followed by the plywood and the gypsum board.The study of building energy consumption by porous hygroscopic materials uses a software simulation method.The simulation combines the climatic characteristics of the middle and lower reaches of the Yangtze River(taking Nanjing as an example),mainly analyzing the effects of wool insulation materials,gypsum board and plywood on the indoor temperature and humidity of the house in different seasons and energy-saving effects.In the study,the typical parameters of residential buildings in Nanjing were selected,and the number of residential ventilation was measured.Based on this,the representative model was designed and finally simulated by WUFI software.The results prove that under practical conditions,the use of porous conditioning materials can effectively slow down indoor temperature and relative humidity fluctuations.Among them,the wool insulation material has the best effect adjustment,the annual energy saving rate is 10.5%;the plywood adjustment effect is middle,the annual energy saving rate is 6.2%;the paper gypsum board adjustment effect is not obvious,the annual energy saving rate is 0.7%.The whole thesis contains about 50 000 words,80 pictures and charts.