Study On Parametric Design Method Of Changeable Building Skin Based On Daylight Optimization

As the boundary separating the building from the outside world,the building skin is the key part to realize energy-saving design.Compared with traditional building skin,the changeable building skin can improve indoor light environmental comfort by combining active and passive energy-saving technology into building skin,thus reducing the use of mechanical and electrical systems and achieve the purpose of energy conservation and emission reduction.Taking optimizing lighting consumption as the breakthrough point of the changeable building skin design,this paper adopts the method of literature review,multi-crossed disciplines study,qualitative and quantitative analysis,comparative analysis,based on the analysis of related research status at home and abroad,starting from the theoretical basis of the changeable building skin,with aid of parametric design software Rhino,Grasshopper and parametric performance analysis toolkit Ladybug Tools,gradually set up a parametric design method of the changeable building skin which aims at the optimization of light environment,which realizes the connection between building performance simulation platform and parametric modeling platform,improves the rationality of changeable building skin design logic based on daylight optimization,and strengthens the rigor of its design process.The feasibility of this design method is demonstrated by a design experiment of a virtual case.According to the simulation results,the building which use the changeable building skin obtained by this design method compared with the buildings without building skin and those using traditional static building skin,it can greatly reduce the occurrence of uncomfortable glare under the premise of guaranteeing the indoor lighting demand(both UDI and DA meet the relevant specification requirements).Probability,the changeable building skin improves the comfort of indoor light environment,and energy saving is about 29.4%compared with buildings without building skin,and 24.15%compared with buildings with traditional static building skin.This shows that the changeable building skin has greater potential in improving indoor lighting environment and reducing energy consumption of building operation.Finally,the technical advantages and limitations of the parametric design method of the changeable building skin based on lighting environment optimization are put forward,and its development trend is prospected.