Accession Number : AD0450224


Title :   HEAT DISSIPATION FROM ABOVE GROUND SHELTERS


Descriptive Note : Technical note


Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA


Personal Author(s) : Stephenson, J M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/450224.pdf


Report Date : 25 Sep 1964


Pagination or Media Count : 49


Abstract : Above ground structures which have been officially designated as fallout shelters pose a number of ventilation problems which require attention to insure that the thermal environment of the protected area will be habitable. The various materials and configurations of the structures and the effect of solar radiation requires that the heat transfer through walls and other surfaces be considered separately. To provide heat transfer data for those structures which are of thick wall construction, a widely accepted analytical solution was programmed for the 1620 computer. A modified psychrometric chart was developed so the sensible heat factor technique can be used to determine ventilation requirements for above ground shelters subjected to unusual climatic conditions. Sample calculations for a 500 man shelter located in St. Louis, Missouri show that the maximum heat gain through the thick walls is only 1.79% of the human load and the heat loss through the floor is 3.33% of the human load. The people in this case contribute almost the entire net heat load. Continued work on this task is directed toward the accumulation of more data on heat transfer through walls of heavy construction, and heat loss through the floor. Further modifications to the psychrometric chart may be needed and the inside design conditions are to be investigated with respect to comfort vs. economy.


Descriptors :   *HEAT TRANSFER , *COOLING AND VENTILATING EQUIPMENT , *FALLOUT SHELTERS , SYSTEMS ENGINEERING , CIVIL DEFENSE , STRUCTURES , CONSTRUCTION , THERMAL CONDUCTIVITY , SOLAR RADIATION


Subject Categories : Civil Defense
      Air Condition, Heating, Lighting & Ventilating


Distribution Statement : APPROVED FOR PUBLIC RELEASE