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为快速、准确地评价集中通风系统中的室内空气品质 ,提出了污染物可及度的指标对全新风时污染物分布的不均匀程度进行描述 ,并针对实际的系统连接形式 ,建立了带回风时污染物浓度分布的计算模型。该模型综合了集总参数法和计算流体力学 (CFD)的特点 ,充分考虑了污染源位置、回风和局部排风等因素的影响。通过对各个房间的一次CFD模拟 ,获得了系统所有房间内的实际污染物分布。该算法可克服传统集总参数法结果不准确和 CFD需要多次迭代等方面的不足
In order to evaluate the indoor air quality in the centralized ventilation system quickly and accurately, the index of the pollutant accessibility is proposed to describe the non-uniform distribution of the pollutants in the fresh air. According to the actual system connection form, Calculation Model of Pollutant Concentration Distribution in Wind. The model combines the characteristics of lumped parameter method and computational fluid dynamics (CFD), taking full account of the impact of pollution source location, return air and local exhaust. Through a CFD simulation of each room, the actual distribution of contaminants in all rooms of the system was obtained. This algorithm can overcome the shortcomings of the traditional lumped parameter method such as inaccurate results and multiple iterations of CFD