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Development and evaluation of a new push-pull ventilation system for sheet-adhesive work inside bus-body
Hisao Yotsumoto1, Yoshihisa Hayakawa, Toshihiko Myojo
1National Institute of Industrial Health, 6-21-1 Nagao, Tama, Kawasaki, 214-8585, Japan.
Industrial Health
|April 4, 2003
Summary
A new push-pull ventilation system effectively manages volatile organic compounds during sheet-adhesive work in confined spaces. Optimal performance was achieved with a push flow of 24 m3/min and pull flow of 78 m3/min, maintaining low air velocity.
Area of Science:
- Occupational Health and Safety
- Environmental Engineering
- Fluid Dynamics
Background:
- Sheet-adhesive work in confined spaces like vehicle interiors poses risks due to volatile organic compound (VOC) exposure.
- Effective ventilation is crucial for worker safety and air quality in such environments.
Purpose of the Study:
- To evaluate the performance of a novel push-pull ventilation system for controlling airborne contaminants during sheet-adhesive applications.
- To determine optimal airflow parameters for the ventilation system within a scaled model of a sightseeing coach.
Main Methods:
- A half-scale model of a 12m sightseeing coach was constructed.
- A prototype push-pull ventilation system was implemented and tested within the model.
- Airflow distribution, velocity, and concentrations of xylene and methanol vapors were measured.
Main Results:
- The optimal ventilation configuration involved a push flow of 24 m3/min and a pull flow of 78 m3/min.
- Air velocity within the model remained below 1 m/s, ensuring a comfortable and safe working environment.
- Significant reduction in xylene and methanol vapor concentrations was observed.
Conclusions:
- The tested push-pull ventilation system is effective for controlling hazardous vapors in confined vehicle interiors.
- The system's design principles are transferable to other elongated, confined spaces such as train and airplane bodies.
- This technology offers a viable solution for improving occupational safety in industrial settings.
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