Research On The Design Of Variable Building Reflective Elements Based On Multi-objective Optimization

With the development of the times,people have higher requirements for building comfort.Some of the built office buildings are limited by the technical conditions,social conditions and economic conditions at that time,and there is no scientific and perfect design specification as a guide.After the completion,there are some factors that affect the indoor light environment comfort,such as unreasonable window floor ratio,large office depth and unreasonable building orientation.In order to improve the lack of indoor lighting environment,building reflective component as an economic and practical auxiliary lighting component is often used in building transformation.In this paper,the intelligent movement mode of the traditional building reflector and the variable skin is combined,and the indoor light environment and energy consumption are taken as the optimization objectives.Through the building performance simulation software and multi-objective optimization platform and other tools,a variable building reflector which can optimize the building light environment and reduce energy consumption is designed.Based on the relationship between building auxiliary lighting components and indoor light environment,this paper introduces the research object variable building reflective components.Performance simulation software and multi-objective optimization data processing platform provide a method and technology platform for the design of variable building reflective components.For indoor light environment performance simulation,we need to select a city’s meteorological data file and establish the building model for research and analysis.In this paper,Xiamen office building is selected as the object of variable building reflective component optimization.Through questionnaire and field survey,the deficiencies of light environment of Xiamen office building are found,and a general unit office space model is established.After getting the general unit office space model of Xiamen area,the optimization effect of North-South reflective components is compared.It is found that the light environment optimization effect of South Office is more obvious.Then,based on the South Office,the influence of reflective component width and reflective component erection height on the light environment optimization effect is simulated and analyzed,and the appropriate width and erection height are obtained.Then,using the ladybug tools toolkit as the performance simulation platform and octopus as the data processing platform,based on the unit office space model,a variable building reflective component with three motion forms is designed.At 15:00 on the summer solstice,the multi-objective optimization solution demonstration was carried out,and the Pareto optimal solution set was obtained.Then the simulation results were evaluated and screened to select the optimal state.Through this method,the status table of variable building reflective components including vernal equinox,summer solstice,autumn equinox and winter solstice is sorted out,and the performance evaluation indexes are compared.The simulation results show that the lighting uniformity is improved,the probability of glare is reduced,and the energy consumption is reduced by 11.6%after four solar terms,which proves that the variable building reflectors designed in this study can optimize the indoor light environment and reduce energy consumption.In order to verify the light environment optimization effect of variable building reflective components,using the same multi-objective optimization method,based on the measured office,the hourly component status table of three measured dates is obtained.Make a solid model and adjust the component state according to the simulation results to measure the light environment.After statistical comparison of the measured results,the light environment optimization effect of the variable building reflective component is confirmed.Finally,the design methods and technical limitations of variable building reflective components based on multi-objective optimization are summarized,and the future development of variable building reflective components is prospected.