Performance-orientated Method And Algorithm Of Parametric Design And Optimization In Early Design Stage

A large number of researches and projects all over the world show that, decisionsmade in the early design stage have great influences on the building performance,including sunlight, daylighting, ventilation, comfort and energy consumption. In orderto combine the building parametric design method and the performance target in earlydesign stage, this thesis explored the application of parametric performanceoptimization method in office building and residential building, researched on theoptimization strategy and algorithm, finally proposed the performance-orientatedparametric design process. Work is as follows:Firstly, this thesis investigated into the application of parametric design method,method of building form generation, development of performance optimization anddesign.Secondly, influences of parameters related to office building form and fa ade onthe single performance such as daylighting, ventilation, thermal comfort or on the totalenergy consumption were researched, and parametric performance optimization methodfor office building was proposed. Under this method, based on3office building cases in2different climatic zones, simulations were performed and solutions to the accordingproblems were proposed. The above work would help to accumulate experiences in theaspects of expanding the multi-objective optimization algorithm integrated into theparametric performance optimization plug-ins and increasing the diversity of buildingform and fa ade.Thirdly, in order to explore the application of parametric performance designmethod in residential design and optimization, this thesis performed an optimization ofa residential case through common green building performance simulation softwareunder the conventional approach. The disadvantage of the conventional design process,“simulation when design is finished”, was pointed out after review of the conventionaldesign process. So a new process of residential design and optimization,“begin with thehousing unit”, was proposed. And redesign and re-optimization under the new processwere performed.Fourthly, algorithm integrated into the parametric performance optimization plug-ins was researched, including3parts:(1) Accuracy validation of total energyconsumption prediction model. Based on a standard office building model, the heating,cooling, lighting energy consumption was simulated through MEESG algorithm andDesignBuilder (DB for short), then the results between MEESG and DB were comparedand analyzed;(2)Lighting energy consumption prediction model of building withself-occlusion. This thesis focused on the influences of floor number, exterior zonedepth, WWR on the daylight autonomy in buildings with self-occlusion; and theinfluences of spacing, shape, location and area allocation between two atriums ondaylight autonomy in rectangle buildings.(3) Surface wind pressure distribution onbuilding of different forms. Based on4different typical building forms, the surfacewind pressure was calculated under different wind directions, then the results wereanalyzed. According to the above work, the empirical formula of surface wind pressurecan be established, and the optimal target function of ventilation be set up.Finally, the performance-orientated parametric design process was proposed, thecommon architectural design3D modelling software was selected as a platform, and theinterfaces of integrated performance simulation plug-ins were designedMain achievements are:(1)performance-orientated parametric design process;(2)office building parametric performance optimization method;(3)new process ofresidential design and optimization;(4) relative deviation and deviation direction ofheating, cooling and lighting energy consumption between MEESG and DB;(5)lighting energy consumption prediction model establishment in building withself-occlusion; and influences of spacing, location, shape, area allocation between twoatriums on daylight autonomy in rectangle building;(6) regularities of surface windpressure distribution on buildings of different forms.