Research On The Thermal Performance Of Thermal Bridges In Exterior Insulation System Of Building Based On BIM Technology

Total energy consumption in the building society account for a large proportion, along with China’s rapid economic development, people’s energy saving construction sector put forward higher requirements. Building insulation technology as an important means of thermal insulation is widely used. Stone walls with external insulation layer is represented normally present in steel link member as a thermal bridge-through, the dissipation of the heat of the channel, so that such heat bridges of construction is important.China is currently widely used two-dimensional CAD design technology as an auxiliary means of thermal bridges and heat transfer calculations compensation design, architectural design and detail plans and elevations are separate, it is difficult for the specific location and energy consumption quantitative analysis can condition. The three-dimensional building information model-centric BIM technology utilizes three-dimensional drawing tools, capable of all aspects of building design, various parts of the detailed description, an accurate description of the node in the structure based on providing an interface with a variety of different forms of analysis software co-docking, can carry out building energy simulation, building energy consumption to achieve a quantitative analysis. Based on the above advantages, BIM technology will be the future of architectural design and energy simulation is an important way.Firstly, for the stone wall exterior insulation system through thermal bridges exist, the use of multi-loop heat bridges tester, winter conditions in the field measurement analysis, access to actual case temperature distribution and heat transfer simulation of the actual data as the next step basis; Secondly, the use of building energy simulation technology research methods to practical engineering plug-stone walls using metal connectors and embedded parts for the prototype, through the accurate modeling of buildings, building models given the correct material and environmental parameters obtained consistent with the actual building architectural models, according to the IFC standard import the model simulation software for heat transfer simulation analysis. Through measurements and simulations, to explore the whole set of BIM way of thinking of the thermal bridge simulation method.This research is the use of BIM technology to build thermal bridge heat transfer simulation analysis provides some theoretical guidance. Through in-depth research building envelope thermal bridge heat transfer process, accurately simulate stone wall heat bridges to provide a new building energy research methods. This work will be the implementation of low-carbon design concept, to promote building energy efficiency design has a certain theoretical and practical significance.