Study On Concurrent Design Platform For Passive Climate Control Buildings

Traditional architectural design process belong to a serial linear terminal type process and there is no too much cross-over design between different majors. It is mostly tend to adjust the indoor environmental comfort by HVAC engineer through the late equipment system designing. Such design not only consumes large amounts of energy in construction phase and operation phase, but also causes environmental pollution and disruption. In reaction to the phenomenon, it should exploit the adjustment potentialities of building itself, and use passive climate control technology and renewable energy to improve building thermal performance as a whole by expending resources and energy as low as possible. The design process of passive climate control building should look again at the traditional linear terminal type design process. It is necessary for equipment engineers to fully participate in the architectural design process and assist architects to achieve building thermal design optimization, realizing building energy conservation as far as possible in building design stage. This article explore the passive climate control building design method through the research and analysis on the application for design strategy and technical of passive climate control building, establishing the concurrent design platform for architects and engineers based on BIM methodology, and application research on performance evaluation of design scheme in design process. This paper, through theoretical and experimental research, practice of engineering design, mainly discusses the following problems:First of all, the concurrent design method was selected as a foundation for the passive climate control building design and building performance evaluation model in the concurrent design process was established. The building performance evaluation model can throughout the whole building design and construction process, starting from the concept design to evaluate building micro climate, at preliminary design stage to evaluate building light environment and thermal environment, to use temperature field visualization to evaluate building thermal performance when construction is completed. The concurrent design method and the establishment of evaluation model provide theoretical research foundation for building concurrent design platform for passive climate control buildings.Secondly, for passive climate control building design, design strategy and technology application are studied. Design strategies and technology application should follow the rule of the pyramid. Changing building form and envelope to reduce the building energy demand and taking advantage of passive technology to use renewable energy, as far as possible to avoid using auxiliary equipment are the main target of design strategies and technology application. Passive climate control building design strategy is studied on three scale of building groups, building and building parts from four aspects:daylighting, heating, cooling and ventilation. Through the case of quantitative analysis, the passive heating technology application is emphatically studied. Research shows that it can reduce energy consumption by38.7%using passive climate control technology. Research on the applicability of the passive design strategies shows that Beijing and Lanzhou are more suitable for using attached sunspace in the four cities, and the heat supply reliability of solar air collector in four cities from high to low is Beijing38%, Lanzhou35%, Shenyang31%and Xian27%.Thirdly, the application of performance evaluation method based on BIM for building scheme at different stages is researched. At planning and layout stage, the building best orientation is identified by using Weather Tool and the effect of passive strategies for building thermal comfort range is analysed by using psychrometric chart. During preliminary design stage, in order to help architect complete thermal optimization design and improve design scheme, the architect’s design scheme is evaluated at natural lighting and thermal environment two aspects by using Ecotect. After completion of construction, it provide a feasible method for evaluating thermal performance of existing building through the experimental research on indoor temperature field visualization. At the same time it can be used as expert information database to join the concurrent design platform to assistant architect for decision making.Finally, the design method of passive climate control building is explored through the research on the design team, the design platform, the design process and design scheme evaluation method. In this method, the design team is composed of architects and HVAC engineers. BIM platform is selected as the concurrent design platform which can integrate building information. The cross-over cooperation of architects and HVAC engineers from concept design to the establishment of the building information model and then to the design scheme optimization forms the design process. Entropy weight multi-objective decision is selected as design scheme evaluation method which comprehensive some evaluation indexes such as building energy consumption, passive technical heating supply, average coefficient of natural lighting, the all year discomfort degree hours and economic indicator. Finally through the case design, it discusses concrete application of passive climate control building design based on concurrent design platform.