Research On Spatial Shape Optimization Of Industrial Area Based On Air Pollution Diffusion Simulation

With the continuous advancement of industrialization,air pollution has become a global common problem,and China is also facing the severe challenge of air pollution prevention and control.Industrial areas are the main source of air pollution,and pollution prevention and control in industrial areas plays an important role in improving urban air environment.In urban planning and design,the goal of pollution prevention and control is achieved through industrial space optimization and spatial shape control,which is the frontier of current planning research.The paper uses AERMOD and PHOENICS to analyze the pollution diffusion of industrial areas and typical high pollution risk areas respectively,and proposes the spatial shape optimization strategy for industrial areas in response to air pollution from the functional area level,block level and architectural design level.This has important practical application value for improving the air environment from the professional level of urban planning.By analyzing the relevant research progress on pollution diffusion and spatial morphology at home and abroad,this paper establishes the use of AERMOD to achieve industrial area pollution risk assessment and the use of PHOENICS to reduce pollution safety risks based on the relevant research results and relevant simulation technology research practices.A software-coupled industrial area spatial shape optimization idea.This paper takes the industrial zone in Beichen District of Tianjin as the research object,and uses AERMOD to carry out the simulation analysis of the pollution diffusion of the whole time and space in the industrial zone of Beichen District.According to the pollution risk zoning standard,the pollution risk zoning is delineated,and the high pollution risk zoning is diagnosed and analyzed.Using PHOENICS to carry out further pollution diffusion simulation analysis of typical high pollution risk blocks,the pollution spread in the overall space is linear and continuous,the upwind direction is less polluted than the downwind direction,and the ventilation corridors consistent with the wind direction have pollution spread.Significantly affected diffusion characteristics.There is a secondary accumulation of pollution in the local space,and the pollution diffusion characteristics of pollution accumulation will appear on the leeward side and the windward side of the building in a certain space state.In the space related to the pollution source,there is a large diffusion range of the pollution source superimposed with the upward wind pollution.The higher the shielding degree of the wind direction under the pollution source,the smaller the pollution diffusion distance,and the diffusion of the pollution will be shifted to the open space.Coupling the two types of software for pollution diffusion simulation analysis,formulating relevant planning control requirements at the urban functional area level: conducting pollution risk level zoning for industrial areas,strictly controlling rigid boundaries,and designing open spaces for "control" purposes and Ventilation corridor design for the purpose of “destroying”;At the block level,it is proposed to construct various types of street wind tunnels,including optimizing the spatial location of pollution sources,optimizing the shape of the block,constructing ventilation corridors and laying out protective green spaces,etc.At the architectural design level,it is proposed to design the pollution source and the building,including increasing the opening.The area of the windward surface of the space-related building,the layout of the building adopts the determinant layout or the 2.5-faced layout,the increase of the building height and the associated design of pollution sources and green planting.