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Determination of the Three Key Parameters Estimating Indoor Air Filtration Load Regarding PM2.5 Penetration Through Infiltration

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Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019) (ISHVAC 2019)

Abstract

Air filters are one effective way of removing indoor fine particulate matter (generally known as PM2.5). An accurate evaluation of indoor PM2.5 filtration load will provide great help in designing efficient air filtration systems. In order to make the existing indoor PM2.5 filtration load calculation model more available by considering the availability of some important parameters, such as air infiltration volume through a unit length of external window (ql), particle penetration factor (P), and deposition rate (k), this study introduces a determination method of those key design parameters for various external window airtightness levels under infiltration conditions. Furthermore, the indoor PM2.5 filtration loads were quantified based on a longitudinal field measurement from five unoccupied offices located in the central area of Beijing, China. Results revealed that higher airtightness level windows can help to significantly decrease the indoor PM2.5 filtration load. The proposed method in this study can help in the calculation of indoor PM2.5 filtration load through infiltration and the design of indoor air filtration systems.

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Acknowledgements

This work was sponsored by the 13th Five-Year Key Project, Ministry of Science and Technology of China (No. 2017YFC0702800).

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Correspondence to Chao Chen .

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Chen, Z. et al. (2020). Determination of the Three Key Parameters Estimating Indoor Air Filtration Load Regarding PM2.5 Penetration Through Infiltration. In: Wang, Z., Zhu, Y., Wang, F., Wang, P., Shen, C., Liu, J. (eds) Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019). ISHVAC 2019. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-9520-8_17

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