The traditional mixing ventilation is not an energy effective approach to remove indoor air pollutants, maintain breath zone air quality, and control the airborne transmission. This study investigated the potential of a localized laminar airflow ventilation system to alleviate human exposure to pollutants. Breathing thermal manikins with sitting posture and supine posture were used to simulate the human. N₂O was used as the tracer gas to simulate the indoor pollutant emission. The contaminant exposure index (ε_exp) and intake fraction index (IF) were used to assess the risk of human pollutant exposure for various supply air velocities given different emission source positions. Enhanced pollutant removal efficiency (E_ff) (from the result) showed the qualification and desirability of the localized laminar airflow ventilation system in improving the breath zone air quality. The results showed that the CFD results could fit well with the experimental data and found out the interaction between thermal plume and supply air. The results also indicated a low ε_exp and IF, with over 90%, all of which were highly correlated with the supply velocity. Human’s different breathing methods have little influence on the pollutant exposure so as to the location of the pollution source. This study found that localized laminar airflow ventilation system could efficiently provide fresh air to the breathing zone without sacrificing the thermal environment around human. It can be used for small region air quality control such as that in the bedroom and living room where desired air quality is favored.

传统的混合通风不是去除室内空气污染物，维持呼吸带空气质量和控制空气传播的节能方法。这项研究调查了局部层流通风系统在减轻人体暴露于污染物中的潜力。使用坐姿和仰卧位呼吸热人体模型来模拟人体。使用N ₂ O作为示踪气体模拟室内污染物排放。污染物曝光指数（ε _EXP）和吸入率指数（IF）被用来评估人的污染物暴露给定的不同的发射源位置的各种供给空气速度的危险。增强的污染物去除效率（E _ff）（根据结果）显示了局部层流通风系统在改善呼吸区空气质量方面的资格和合意性。结果表明，CFD结果与实验数据吻合得很好，并发现了热羽与送风之间的相互作用。结果还表明低ε _EXP和IF超过90％，所有这些都与供应速度高度相关。人类不同的呼吸方式对污染物的暴露以及对污染源的位置影响很小。这项研究发现，局部层流通风系统可以有效地向呼吸区域提供新鲜空气，而不会牺牲人体周围的热环境。它可用于小范围的空气质量控制，例如在卧室和客厅中需要较理想的空气质量的地方。