Zonghua Huang
Optimizing Vertical Unidirectional Airflow in Cleanrooms: An Integrated Approach to Floor Perforation, Plenum, and Fan Filter Unit Configurations
Huang, Zonghua; Zeng, Cheng; Wang, Zhichu; Lu, Jun; Xiang, Qian; Huo, Xingcheng; Tan, Tingdong; Li, Yan; Feng, Wenmao; Zhang, Guitao
Authors
Dr Cheng Zeng C.Zeng@hull.ac.uk
Lecturer in Renewable Energy & Sustainable Technologies
Zhichu Wang
Jun Lu
Qian Xiang
Xingcheng Huo
Tingdong Tan
Yan Li
Wenmao Feng
Guitao Zhang
Abstract
Maintaining vertically unidirectional airflow in cleanrooms is crucial for achieving air cleanness and protecting occupants inside, from industrial semiconductor technicians to hospital surgeons and patients. This study investigates airflow inclination and develops optimization strategies for vertical unidirectional flow cleanrooms, with a focus on enhancing airflow verticality and uniformity to reduce airborne contamination. A new dimensionless parameter, K1, is introduced to quantify the impact of lower interlayer airflow velocity on cleanroom airflow inclination, thereby providing a practical metric for design optimization. Key influencing factors, including flooring perforated plate configurations, plenum heights, and FFU (Fan Filter Unit) layout rates, are systematically evaluated. The results indicate that lower perforation rates (e.g., 10%) significantly improve vertical airflow by reducing inclination angles to below 25°, with a non-uniform perforated plate arrangement proving essential to sustain airflow verticality. Moreover, non-uniform perforated plate configurations are particularly effective in designs with low plenum heights (below 1.3 m). In addition, FFU layout rates above 60% are found optimal to provide vertical airflow, consistently achieving inclination angles below 20°. Further changes in FFU layout rate show minor returns on airflow verticality. The study establishes clear design guidelines for airflow optimization and highlights the dual benefits of these configurations in safeguarding occupational health and controlling airborne contamination in cleanrooms.
Citation
Huang, Z., Zeng, C., Wang, Z., Lu, J., Xiang, Q., Huo, X., Tan, T., Li, Y., Feng, W., & Zhang, G. (2025). Optimizing Vertical Unidirectional Airflow in Cleanrooms: An Integrated Approach to Floor Perforation, Plenum, and Fan Filter Unit Configurations. Atmosphere, 16(6), Article 632. https://doi.org/10.3390/atmos16060632
Journal Article Type | Article |
---|---|
Acceptance Date | May 16, 2025 |
Online Publication Date | May 22, 2025 |
Publication Date | 2025-05 |
Deposit Date | May 22, 2025 |
Publicly Available Date | May 27, 2025 |
Electronic ISSN | 2073-4433 |
Publisher | MDPI |
Peer Reviewed | Peer Reviewed |
Volume | 16 |
Issue | 6 |
Article Number | 632 |
DOI | https://doi.org/10.3390/atmos16060632 |
Public URL | https://hull-repository.worktribe.com/output/5182187 |
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Copyright Statement
© 2025 by the authors.
Licensee MDPI, Basel, Switzerland.
This article is an open access article distributed under the terms and
conditions of the Creative Commons Attribution (CC BY) license.
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