Design Theory And Experimental Research Of Compound Variable Building Skin Based On Multi-objective Optimization

In this paper,according to the climate characteristics of hot summer and warm winter area,the composite variable building skin is designed,and the qualitative and quantitative analysis is carried out from the theoretical research of variable building skin.Using software simulation,multi-objective optimization,experimental research and other methods,and on the basis of the relevant research at home and abroad,the practical construction of composite variable building skin is carried out.Its skin scheme is composed of three parts:intelligent blinds for dynamic shading,reflective panels for intelligent light environment control and intelligent vents for improving indoor comfort,so as to improve indoor thermal environment and reduce building energy consumption.On this basis,the control system principle and control strategy of the composite variable building skin are analyzed and sorted out,and the skin scheme is measured.In order to ensure the accuracy of the measured research,the skin scheme is compared with the common building skin under the same conditions.The two groups of measured data of solar thermal environment and energy consumption are sorted and compared,and the practical application effect of the composite variable building skin is analyzed.During the experimental test,the research results show that the energy saving rate of the composite variable building skin is 19.6%compared with the traditional static skin,the proportion of indoor thermal environment comfort PMV in-1～1(thermal comfort zone)is 10.3%higher than that of ordinary skin,and the proportion of comfortable light intensity of each measuring point is also higher than that of ordinary skin.At the same time,with the help of parametric design software rhino,grasshopper and parametric performance analysis package ladybug,honeybee as the platform,and according to the measured results to guide the establishment of a composite variable building skin simulation model,on the one hand to verify the feasibility of the composite variable building skin;on the other hand,using Galapagos single objective optimization method to study the effect of the relevant variables of the skin scheme on building energy The relationship between light consumption and thermal environment.On this basis,the specific skin form and combination type are obtained by using Octopus multi-objective optimization method.After the simulation study,it can be found that the energy consumption of the final skin scheme is higher than that of ordinary skin by 28.6%.The indoor thermal comfort PMV is 45%in-1～1(thermal comfort zone),the illumination uniformity is 0.83,and the light environment SUDI value is 78%,which are higher than other types of skin results.It fully proves that the composite variable building skin can effectively improve the indoor thermal environment and reduce the building energy consumption in this area.This paper explores the multi-objective optimization design method of composite variable building skin in hot summer and warm winter area,obtains the design parameters and specific control strategies of the area,and also provides a new direction and idea for the future composite variable building skin design and control mode.