Analysis And Research Of Comfortability Under BIM Modeling And Low-Energy Consumptive Constructions

With the exacerbation of global energy consumption, sustainable green building design is now being paid high attention worldwide.In order to reduce the negative effect of the environment and energy caused by construction and make buildings more suitable to the local climatic conditions to the maximum limit,we need to bring into the BIM(Building Information Model) technology into the early stage of architectural design so as to optimize the indoor environmental comfortability to fulfill the building energy conservation and reach the sustainable development of architecture and the natural environment.Firstly, conceptual as well as theoretical analysis has been conducted on contents needed to be explained in this paper. By using professional grouping and decomposition building model to modeling, a detailed design for pipeline has been conducted and the hierarchical data transmission at the design stage of architectural information mode has been finished, thus achieving the professional collaboration and parameter combination of model data. Finally,the model data based on the IFC standard has been transformed, which provides the data basis for the sustainable analysis of construction.Secondly, three different schemes of Ulan Bator in Mongolia have been adopted to build BIM model. Energy consumption simulation as well as thermal comfortablity analysis of energy consumption simulation has been conducted through Design Builder software. Based on the analysis of influential factors of architectural cooling/heating load design variables of thermal environment, indoor temperature, relative humidity and PMV index are turned out to be the main architectural design variables of architectural low-energy thermophilic design.According to the simulation result, the relationship between factors of indoor thermal comfortablity in these three scheme has been analyzed to match PMV-ET, thus obtaining thepredictive neutral temperature value. The working conditions under different comfort level has been figured out based on the matching result of PMV-ET. Then the indoor temperature has been determined according to these working conditions. In addition, architectural energy consumption has been simulated and analyzed to obtain the optimal scheme of architectural energy saving.Finally, the author has utilized BIM technology to conduct modeling on a building scheme in Xi’an and used Ecotect software to conduct simulation and optimal design on the lighting environment of constructions. According to the specifications on lighting methods as well as indoor lighting environment of educational buildings, design variables of lighting environment has been screened. Intensive analysis of lighting timing, transmittance rate of glass window, positions of window as well as area of window has been achieved to obtain the lighting analytic method and comfort design method of lighting environment under low-energy construction. Based on the simulation of indoor lighting environment, the architectural lighting environment has been optimized and the lighting energy saving has been successfully realized.