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- Title
Optimal technology innovation of teaching buildings for primary and middle schools based on compound negative pressure ventilation.
- Authors
Zhou, Kun; Li, Shuting; Cao, Ruihua; Ma, Xuliang
- Abstract
To improve the air quality of classrooms in primary and middle schools, and solve the contradiction between indoor air quality and thermal comfort caused by intermittent natural ventilation, a composite negative pressure ventilation mode that combines passive building energy saving design and negative pressure ventilation is proposed. This requires the coordination of related facilities in the classrooms and corridors to achieve, so the optimization design of teaching buildings is studied. On the basis of expounding the principle of compound negative pressure ventilation, firstly, the feasibility of negative pressure ventilation in improving the air quality of classrooms is verified through actual measurement. Then, a digital model of typical classrooms and corridors is established, with a variety of working conditions set up to compare and study related facilities—external wall exhaust fans (power, location), high side windows on internal walls (size, location), and bottom heating (power, Location), etc. on the impact of combined negative pressure ventilation. Through the analysis of the indicators of the various elements of the physical environment (CO concentration, air age, temperature field, and wind speed field) in the classroom in the CFD simulation results, the design parameters and optimal combination modes of related facilities are proposed. Finally, the optimization mode and use strategy of teaching buildings in primary and secondary schools are proposed. The research results show that the combined negative pressure ventilation can save more than 10% energy while improving the air quality and thermal environment in the classroom in winter and summer. Because it has the advantages of light technology and easy operation, it can be widely used in the new construction and renovation of nearly 300,000 primary and secondary schools in China.
- Subjects
CHINA; NATURAL ventilation; VENTILATION; PRIMARY schools; MIDDLE schools; POSITIVE pressure ventilation; INDOOR air quality
- Publication
Applied Nanoscience, 2023, Vol 13, Issue 3, p2037
- ISSN
2190-5509
- Publication type
Article
- DOI
10.1007/s13204-021-02066-1