GRAVITY VENTILATION OF UNDERGROUND SHELTERS
Final rept. for Sep 1963-Jun 1964
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
Pagination or Media Count:
Tests were conducted to determine the suitability of using gravity ventilation as an emergency method of providing air for survival in an underground shelter. The tests consisted of inducing through a simulated test shelter an airflow caused by a inside - outside temperature differentials, and b stack heaters in the exhaust duct. An additional test was made which involved a device to direct wind into the intake duct. It was found that wind blowing over the inlet and exhaust ducts created a negative pressure in the shelter that could not be satisfactorily overcome by the gravity methods used thus, minimum ventilation rates could be obtained only when there was no wind blowing. In the tests conducted to utilize the wind, an NCEL-designed air inducer which mounts on the inlet duct provided satisfactory ventilation during normal weather conditions when there was a wind of 6 to 8 miles per hour.
- Life Support Systems
- Structural Engineering and Building Technology