本研究评估了局部送风在控制牲畜隔离建筑工人呼吸区或附近空气质量方面的有效性。在中试规模的实验设施中，对商用天花板（箱式）扩散器和局部送风系统进行了评估，并比较了它们对空气中粉尘的通风效率和粉尘浓度的空间变异性。商用天花板扩散器为单向（即box1）或双向天花板扩散器（即box2）。局部送风通风系统包括在中央小巷引入补充空气，与单向（即local1）或双向（即local2）商用天花板扩散器相结合。与box1和box2扩散器相比，local1和local2都提高了小巷的通风效率。 此外，local2具有最高的整体相对通风效率（E0=1.36）和最均匀的粉尘浓度分布（CV=0.17），这表明该系统在改善畜牧业建筑内的空气质量方面具有潜力。此外，就通风效率和粉尘浓度的空间变异性而言，墙壁排气（即，位于一面墙中心的排气）通常优于地板排气（即，位于地板中心的排气），尤其是对于局部通风系统。单位:双引文:研讨会，ASHRAE交易，第109卷，第。堪萨斯城，2003年

This research evaluated the effectiveness of local supply ventilation in controlling air quality at or near workers’ breathing zones in livestock confinement buildings. Commercially available ceiling (box-type) diffusers and local supply ventilation systems were evaluated in a pilot-scale experimental facility and compared in terms of their ventilation effectiveness for airborne dust and spatial variability in dust concentration. Commercial ceiling diffusers were either one-way (i.e., box1) or two-way ceiling diffusers (i.e., box2). The local supply ventilation systems involved introducing supplemental air at the central alley in combination with either the one-way (i.e., local1) or the two-way (i.e., local2) commercial ceiling diffusers. Both local1 and local2 improved the ventilation effectiveness at the alley compared to box1 and box2 diffusers. Additionally, local2 had the highest overall relative ventilation effectiveness (E0= 1.36) and most uniform dust concentration distribution (CV = 0.17), indicating the potential of this system in improving the air quality within livestock buildings. Further, the wall exhaust (i.e., exhaust located at the center of one wall) was generally better than the floor exhaust (i.e., exhaust located at the center of the floor), especially for the local ventilation system, in terms of ventilation effectiveness and spatial variability in dust concentration.Units: Dual