Exploring The Design Of Passive Energy-saving Building Based On The BIM Technology

With the increase in urban construction area,residents to improve the indoor environment and the growing demand for comfort.China's energy supply faces a major challenge.It is predicted that by 2020,China is now the world's largest energy-consuming countries and carbon emissions,its per capita carbon dioxide emissions have exceeded the world average.And building energy consumption may be the same as the current developed countries,accounting for the proportion of total social energy consumption from the current 30% to nearly 40 to 50%.Therefore,saving energy for construction and improving building energy efficiency is of great significance to China's macro-strategy for energy conservation and emission reduction.Compared to ordinary buildings,passive energy-saving building energy-saving emission reduction of up to 90% or more,you can save a lot of fossil energy use.Although in the energy consumption significantly reduced at the same time,passive energy-saving building living environment,the comfort is not a little reduced,passive energy-saving architectural design to achieve energy-saving and create a comfortable environment for the dual purpose.Passive energy-saving building design methods include building orientation,building insulation,building shape,building shade,the best window wall ratio,natural ventilation and so on.With the size of the building,in addition to the use of passive technology,the designer also need to take the initiative to use new technology to get a good building environment.In recent years,with the rapid development of BIM(Building Information Simulation)technology,its advantage in the architectural design stage is obvious,how to combine BIM technology in passive energy-saving architectural design,break through the interdisciplinary constraints,improve the passive The efficiency and quality of energy-efficient building design is what the designers need to study now.The use of BIM software on the building outside the wind environment,indoor wind environment,the building shape factor and the building towards the building energy consumption,the envelope of the design of the thermal bridge and the construction of the window outside the shade of the building indoor sun direct heat The impact of six aspects of the software simulation analysis.Through the simulation of the outdoor wind environment,we find the defects in the design of the building layout,and then design the corresponding optimization measures.At the same time the outdoor wind simulation results Friends can guide the design of the external window,so as to optimize the building indoor wind environment.In addition,through the BIM software to simulate the different building shape factor and the direction of the building,the building's energy consumption changes,so as to explore the project's best shape factor and building orientation.The design of the non-thermal bridge of the envelope can greatly improve the moisture-proof and anti-condensation ability of the building.The article uses BIM software to simulate the most prone area of the building thermal bridge and verify the effect of the optimized design by software.Summer building shade design on the indoor comfort and building energy consumption also has a significant impact,the article also through the BIM software according to the actual situation of the project to simulate the construction of the best shade form.Through the above BIM software applications,the article for the designer in the design of passive energy-saving buildings to provide a Efficient and feasible method.