| The humid and hot areas have the climatic characteristics of strong solar radiation,strong monsoon,abundant rainfall and large evaporation ratio,and have the advantage of using natural conditions for passive evaporative cooling of buildings.How to make the best use of this natural harmonic effect to improve building thermal environment and reduce indoor cooling load has important practical significance.In recent years,the field measurement method adopted in evaporation cooling research has low repeatability and is not convenient for comparison.In the simulation experiment conducted with the environment chamber,the specimen structure is far different from the actual situation and fails to reflect the real cooling effect in architectural application.Taking Guangzhou as an example,this paper studies the influence of rainfall on building heat and humidity transfer under natural conditions with the help of the whole climate environment simulation module,providing experimental data and application basis for using solar radiation and natural rainfall to realize building horizontal harmonizing interface natural harmonizing cooling and reducing building energy consumption.Firstly,the natural condition reproduction experiment of the all-climate environment simulation module was carried out to analyze the control accuracy and stability of the experimental module and verify the reproduction ability of the all-climate environment simulation module.Based on the one-dimensional dynamic heat transfer mechanism of horizontal harmonic interface,the water circulation constant temperature plate was used to control the internal surface temperature of the interface,and the actual interface structure was built to realize the supplement function of the simulation experiment of the whole climate environment of horizontal harmonic interface.Secondly,in order to study the performance of horizontal and interfacial evaporation and cooling,a comparative experiment of heat and humidity transfer on the roof under rainfall condition was carried out.(1)The experiment of the same material under different rainfall process shows that the cooling effect of daytime rainfall is better than that of night rainfall.The roof of daytime rainfall can reduce1.2℃～2.5℃ per hour,and 0.8℃～1.4℃ at night.(2)The experiment of different materials in the same rainfall process found that the harmonic interface energy with low specific heat capacity rapidly heated up under the action of solar radiation,promoting the evaporation cooling effect,the clay sintered brick roof can reduce1.3℃～2.5℃ per hour,aerated concrete roof can reduce 1.1℃～1.8℃.Finally,taking terracotta brick with high evaporative capacity and square brick with low evaporative capacity as examples,WUFI Plus was used to calculate the annual building energy consumption of the two as horizontal and harmonic interfaces.In Guangzhou area,the annual energy consumption of ceramic sintered brick with the effect of evaporation cooling is 22.94% lower than that without the effect of evaporation cooling,and the energy saving effect is 6.60% higher than that of ceramic tile.Porous materials with strong storage capacity and evaporation capacity can better reduce indoor temperature,reduce refrigeration load,reduce building energy consumption,and have better building energy saving benefits. |
