通风效率是指通风系统向乘客提供新鲜空气、稀释和清除内部产生的污染物的效率。在ASHRAE标准62中，其定义为输送到空间的室外空气中到达占用区域的部分。然而，标准62不包含有关如何评估和测量系统通风效率的实用信息。其他研究人员开发并评估了适用于通风空间的通风效率测量程序。然而，这些方法主要适用于研究人员，通常需要复杂的仪器，而且是劳动密集型的。 研究人员和现场工程师缺乏实用且经济的方法来快速确定通风系统的有效性。ASHRAE启动该项目是为了解决开发实用且经济的测量程序的需要，以评估适用于机械通风动物建筑的通风效果。我们实现这一主要目标的方法包括三项任务:检查量化通风有效性的可用方法和程序，进行实验室实验以确定通风参数（i。 e、 ，通风系统类型，通风率水平，污染源位置）影响通风有效系数，并进行现场测量，以验证所选方法在猪舍中的实用性和适用性。单位:国际单位制

Ventilation effectiveness refers to the efficiency of a ventilation system to provide fresh air to the occupants, and dilute and remove internally generated contaminants. In ASHRAE Standard 62, it is defined as the fraction of outdoor air delivered to the space that reaches the occupied zone. Standard 62, however, does not contain practical information on how to evaluate and measure the ventilation effectiveness of the system.Other researchers have developed and evaluated ventilation effectiveness measurement procedures applicable to ventilated airspaces. These methods, however, are applicable mainly for researchers, usually require sophisticated instrumentation, and are labor intensive. There is a lack of practical and economical methods that researchers and field engineers can use to quickly determine the effectiveness of a ventilation system.ASHRAE initiated this project to address the need to develop practical and economical measurement procedures to evaluate the ventilation effectiveness applicable for mechanically ventilated animal buildings. Our approach in accomplishing this main objective involved three tasks: examination of the available methods and procedures for quantifying the ventilation effectiveness, conducting laboratory experiments to determine how the ventilation parameters (i.e., types of ventilation system, level of ventilation rate, location of pollutants source) affected the ventilation effectiveness factor, and conducting field measurements to verify the practicality and applicability of the chosen method in a swine building.Units: SI