Accession Number:

ADA109079

Title:

Ventilation Surge Techniques. Volume I

Descriptive Note:

Final rept. Sep 80-Dec 81

Corporate Author:

RESEARCH TRIANGLE INST RESEARCH TRIANGLE PARK NC

Report Date:

1981-12-01

Pagination or Media Count:

151.0

Abstract:

The objectives of this project were to investigate the effects of partitions, dense occupancy, and expedient openings on the airflow pattern in fallout shelters. Both experimental and theoretical techniques were used in the study. The experimental program examined airflow patterns for both mechanically driven and thermally driven ventilation. Mechanical ventilation was supplied by an axial fan driven by an electric motor. The thermal ventilation was supplied by simulating the metabolic heat load of the shelter occupants. Because metabolic heat is a combination of sensible and latent heat, a theoretical analysis was made of the relative effect of each type of heat on buoyance. The result showed that latent heat has a much smaller buoyancy effect and, consequently, only the sensible heat input was simulated during the experiments using thermally driven ventilation. Ventilation tests were made using 25 shelter configurations. Airflow patterns and temperature distributions were measured in each configuration using both natural and forced ventilation. An evaluation of the applicability of expedient openings was made using data from the literature and personal contacts. The evaluation addressed a wide variety of construction types and cutting techniques. Author

Subject Categories:

  • Air Conditioning, Heating, Lighting and Ventilating
  • Structural Engineering and Building Technology
  • Civil Defense
  • Nuclear Warfare

Distribution Statement:

APPROVED FOR PUBLIC RELEASE