Chimney Effect and Smoke Distribution in Tube Station Fires
Samsung Co. Ltd, Republic of Korea
Examines how shaft cross-sectional area, shaft height and proximity to the fire govern smoke exhaust and airflow in tube station fires. The findings show how the chimney effect shapes exhaust routes, giving designers a basis for sizing and placing smoke shafts.
- Shaft area ratio of 0.4 or more decides which shaft exhausts smoke
- Shafts under 1 m high act as passages for upward smoke and downward air
- Smoke flow rises with shaft height and cross-sectional area