Research On Structure Generation And Capacity Optimization Of Curved Solar Building Surface Based On Parameterization

With the promotion of sustainable architectural design concept,Building integrated photovoltaics technology has been valued as an important way to develop solar energy resources and made full use of building surfaces.At the same time,the development of flexible thin-film photovoltaic technology presents practical possibilities for the integration of photovoltaics on curved building surfaces.Based on this research,this paper discussed the optimized form of curved photovoltaic building surfaces,in order to obtain the maximum of the production capacity and the stability of the structure.First of all,due to the complexity of the surface form,the design must ensure the rationality of the structure.In this study,the net-shell structure is taken as the main curved surface structure.And the formal features,connection types and constituent elements were summarized in this paper.Twelve typical net-shell structure generating modules were established.Secondly,this study optimized the power generation capability of the surfaces integrated with photovoltaic.With the parametric design tools,the surfaces were adjusted by control points.Using genetic algorithm as the search optimization principle,and using the maximum solar radiation as the objective,the optimization of radiation model was established.Taking the optimization of the curved surface in the south facade as an example,the feasibility of the optimization process was tested,and the influence weight of each control point was analyzed by principal component analysis.Finally,based on the above structure generation module and radiation statistical model,using the software named ‘Grasshopper’ and it’s plug-in,the study further integrated the dual-objective optimization process.To achieve the Pareto optimality which were the minimum of strain energy and the maximum of radiation,this study searched the optimal solution by evolutionary algorithm,in order to obtain the building surfaces with reasonable structure and high production capacity.The optimized design process is involved in the initial stage of the scheme design,and the building performance analysis is pre-positioned through simulation and synergy,thus realizing the unification of structure,capacity and form of the building.This way abandons the passive situation of simulation lag and repeated adjustment in the past.In addition,through the analysis of the control points,the influence of different positions,quantities and amplitudes on the optimized modeling is expounded.So the reasonable direction of the scheme modification is proposed in the deepening stage of the scheme.