Calculate wastage and optimize building energy consumption using GEO BIM

Abstract

In terms of population growth and increasing greenhouse gas emissions, urban energy planning has become a concern. And with the high speed of urban construction, it is claimed that 40% of the total energy consumption is allocated to the building sector. It is believed that energy modeling and simulation are effective in supporting urban energy planning. Today, the increasing availability of 3D models of cities has facilitated energy simulation at various scales. While the Building Information Model (BIM) allows users to explore a building's energy consumption options, GIS-based building models provide the opportunity to simulate city-wide energy demand. Given that many building energy simulations are based on existing GIS using lower-level detail (LOD) models, the aim of this study is to extract accurate geometric semantic information. Use BIM models to build GIS models with higher LOD. In order to more accurately support the energy simulation of buildings, the meanings of BIM models from various sources are consistent with GIS-based building models, and the geometry of BIM models is converted to conform to GIS-based building model standards. After conversion, the result is used to evaluate the amount of energy lost. And after calculating the energy loss, by changing the building elements, the amount of energy loss is optimized as much as possible.
In this study, according to the location, climate, solar angle and various elements of the residential building, after initial calculation and optimization, the desired result was obtained up to a maximum of 50% reduction in energy loss.