某半开敞车库机械排风系统优化设计分析

Analysis on Optimization Design of Mechanical Exhaust System of Semi-opening Garage

半开敞车库的排风系统设计目前缺少可以借鉴的案例,同时车辆怠速时尾气排放量如何处理也无相关规范可依,而怠速运行车辆的尾气排放相比正常运行更加严重,是不得不考虑的问题。本文主要介绍了半开敞车库-澳门口岸落客区针对以上两个难点,采用数值模拟技术进行机械排风系统合理设计的过程。通过采用地面排风口、局部增加排风量的手段优化对比机械排风设计方案,使得车库内CO、NO_2主要污染物浓度达到规范要求。

The design of exhaust system of semi-opening garage is lacking of the reference case; meanwhile, there is no related code how to process the tail gas emission when the vehicle is in idle speed. The tail gas emission of the vehicle rtmning in idle speed is more serious than the vehicle in normal running; and it must be considered. The process for designing the mechanical exhaust system rationally by the numerical simulation technique aiming at the above two difficulties in semi-opening garage, Macao port drop-off area is mainly introduced in this text. The mechanical exhaust design scheme ＇is optimized and compared by the means of ground exhaust and locally increased exhaust air rate, so that the concentration of main pollutants, such as CO and NO2 in the garage can reach the code requirement.