Yang X, Chen Q
Department of Civil, Architectural, and Environmental Engineering, University of Miami, Coral Gables, FL 33124-0630, USA.
Indoor Air. 2001 Dec;11(4):257-69. doi: 10.1034/j.1600-0668.2001.110407.x.
In this paper, a numerical model is presented to study the indoor air quality (IAQ) in a room with different emission sources, sinks, and ventilation methods. A computer program, ACCESS-IAQ, is developed to simulate the airflow pattern, the time history of the contaminant concentrations in the occupied zone, and the inhalation exposures. The program developed may be useful for IAQ professional to design healthy and comfortable indoor environments. A numerical study has been carried out to predict the effectiveness of a displacement ventilation and a mixing ventilation on volatile organic compound (VOC) removal in a model office. Results from the numerical predictions show that when a "wet" emission source (a freshly painted wood stain) is distributed uniformly across the floor area with sinks (gypsum board) from the four vertical walls, displacement ventilation has consistently lower exposure at the breathing level of the occupant in the room. Such an effect is mainly due to the higher ventilation efficiency of displacement ventilation compared to the mixing ventilation. The simulation results also show that the walls adsorb significant amounts of VOCs during the first hour and act as secondary sources thereafter.
本文提出了一个数值模型，用于研究具有不同排放源、汇和通风方式的房间内的室内空气质量（IAQ）。开发了一个计算机程序ACCESS-IAQ，以模拟气流模式、人员活动区域内污染物浓度的时间历程以及吸入暴露情况。所开发的程序可能对室内空气质量专业人员设计健康舒适的室内环境有用。进行了一项数值研究，以预测置换通风和混合通风对模型办公室内挥发性有机化合物（VOC）去除的有效性。数值预测结果表明，当一个“湿”排放源（新涂的木器漆）均匀分布在整个地面区域，且有来自四面垂直墙壁的汇（石膏板）时，置换通风在房间内人员呼吸高度处的暴露始终较低。这种效果主要是由于置换通风比混合通风具有更高的通风效率。模拟结果还表明，墙壁在第一个小时内吸附了大量的挥发性有机化合物，此后充当二次源。
