Accession Number : ADA294395

Title :   Halocarbons as Halon Replacements. Volume 4. Laboratory Testing of Halon 1301 Replacements. Phase 2.

Descriptive Note : Final rept. Dec 88-Dec 92,

Corporate Author : NEW MEXICO ENGINEERING RESEARCH INST ALBUQUERQUE

Personal Author(s) : Dierdorf, Douglas S. ; Tapscott, Robert E. ; Skaggs, Stephanie R. ; Moore, Ted A.

PDF Url : ADA294395

Report Date : MAR 1993

Pagination or Media Count : 92

Abstract : As a result of stratospheric ozone depletion and greenhouse warming concerns, the present halon fire-extinguishing agents will be phased out by 1 January 1994 under an international treaty. The U.S. Air Force has placed a high priority on the development of substitute agents to replace halon fire suppressants. This report describes the laboratory-scale experimental work performed on the Halon 1301 replacement agents. The 5/8-scale NMERI cup burner was used extensively throughout this program. A new laboratory total-flood test apparatus the Laboratory Extinguishment and Emissions Test Chamber (LEETC)-has been constructed to allow both determination of extinguishment concentrations under a total-flood scenario and to measure emissions. Emissions were determined using the Fourier transform infrared (FTIR) spectrometer. The LEETC provided extremely valuable information on both extinguishment and on agent decomposition products under total-flood conditions. The cup-burner results showed that no first-generation agent (hydrochlorofluorocarbon, hydrofluorocarbon, or perfluorocarbon) will provide extinguishment equivalent to that obtained with the present halons. It is recommended that investigations of second-generation Halon 1301 replacement agents be initiated. These agents contain bromine and/or iodine, but have low ozone-depletion potentials and low atmospheric lifetimes because of tropospheric degradation. Further work to develop refined equipment, techniques, and test protocols is also recommended. jg

Descriptors :   *DEPLETION, *HALOGENATED HYDROCARBONS, *OZONE, *STRATOSPHERE, FOURIER TRANSFORMATION, EMISSION, MEASUREMENT, AIR FORCE, LABORATORY TESTS, DEGRADATION, POLYMERS, PROTOTYPES, HEATING, IODINE, REPLACEMENT, SUBSTITUTES, TREATIES, INFRARED RADIATION, FIRE SUPPRESSION, TROPOSPHERE, DECOMPOSITION, TEST FACILITIES, CHAMBERS, SPECTROMETERS, FLUORINATED HYDROCARBONS, BROMINE, GREENHOUSE EFFECT, EXTINGUISHING.

Subject Categories : Organic Chemistry
      Atmospheric Physics
      Inorganic Chemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE