Conference Paper

Proceedings of BSO Conference 2018: Fourth Conference of IBPSA-England

Annual Energy Simulation for Two Indoor Air Purification Strategies

Yuchen Shi, Xiaofeng Li

Abstract: In non-centralized air-conditioned buildings (NAC buildings), two indoor air purification devices can be employed to simultaneously satisfy fresh air and indoor particulate matter (PM) concentration requirements, including air purifiers (APs) and fresh air units (FAUs). When using APs, open-window ventilation should be combined to supply fresh air. When using FAUs, a positive room pressure is required according to relevant standard to prevent outdoor pollutants from infiltrating into the indoor environment (ASHRAE, 2016). From the perspective of annual energy consumption, this study aims to determine which of the two strategies— APs combined with open-window ventilation (AP-Mode) and FAUs combined with positive pressure control (FAU-Mode)—is more energy-saving to simultaneously supply adequate fresh air and remove indoor PM for NAC buildings. Based on the mass balance principle of indoor particulate matter, the relationships among the fresh air supply rate, PM2.5 I/O ratio, and clean air delivery rate (CADR) of APs used in the AP-Mode or FAUs used in the FAU-Mode are investigated. Accordingly, the annual energy consumptions of the two modes are simulated and compared using the outdoor PM2.5 concentration data of Beijing, Shanghai, and Guangzhou in 2015-2017. Based on the simulation results, optimal air purification strategies for NAC buildings in different cities of China are determined.
Pages: 688 - 690
Paper: