Characterization of transient pollutant transport, dilution, and removal for the study of indoor air quality.

摘要

The American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) Standard 62 (Ventilation for Acceptable Indoor Air Quality) requires that a certain flow rate of ventilation air must reach the occupants of a building. A new draft standard, ASHRAE 129P (Ventilation Effectiveness), provides a method-of-test for determining compliance with Standard 62. Unfortunately, due to the properties of air distribution systems, a system designed using Standard 62 will not necessarily fulfill the requirements of the new ventilation effectiveness standard. In this research, a simplified design and analysis method has been developed for finding the air delivery to the occupants of a building. This method employs the Laplace transform/block diagram and age-of-air techniques for the evaluation of indoor air quality (IAQ). A comparison of the simplified method is made to experimental and numerical (computational fluid dynamics, CFD) data and the limitations are presented.