Pre-valuation of indoor PM2.5 concentration based on lumped parameter model
XIE Wei1, FAN Yue-sheng2, WANG Huan2, ZHANG Xin2, TIAN Guo-ji2, SI Peng-fei3,4
1. School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
3. China Southwest Architecture Design Institute, Chengdu 610042, China;
4. College of Architecture, Tsinghua University, Beijing 100084, China
Experiments and theoretical analysis were conducted in a residential building in Changzhou to study particle penetration efficiency and deposition rate through establishing lumped parameter model of indoor PM2.5 concentration. Meanwhile, the accuracy of those models were tested and verified by experiments using a dynamic model, and the collection time from March 2017 to January 2018. According to the experimental data, the result of PM2.5 penetration efficiency was 0.78 to 0.97, while for deposition rate, it was 0.3 to 0.69h-1 when air exchange rate ranged from 0.31 to 0.89h-1. The models could be well applied to indoor particle prediction under different ventilation methods such as natural ventilation, mechanical ventilation, etc. The indoor PM2.5 concentration ranged from 40 to 46μg/m3 by using fresh air system with 82% filtration efficiency, while outdoor PM2.5 concentration was 135 to 150μg/m3.
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