Accession Number : AD0731680

Title :   Automatic Fire Protection System for Manned Hyperbaric Chambers. Phase II. Prototype Design, Fabrication and Test. Volume A. System Design and Test.

Descriptive Note : Final rept. 1 Jul 69-15 Feb 71,

Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TEX

Personal Author(s) : Eggleston,Lester A. ; Herrera,William R.

Report Date : FEB 1971

Pagination or Media Count : 100

Abstract : Based upon the Phase I results, a prototype automatic fire protection system was constructed and tested at SwRI using compressed air and helium air mixtures up to 8 atmospheres. Many problems were encountered before rapid, and reliable infrared (IR) detection could be assured. Other difficulties were encountered with an ionized particle (IP) detector for combustion products, which although not yet completely satisfactory shows an attractive potential for detecting serious overheat situations. Considerable fundamental work was done on this unit in diving atmospheres. A total of 264 tests were conducted. Extinguishment was satisfactory. The overall measured system responses from visible flame to the start of water discharge from the nozzles ranged from 1.3 to 2.4 seconds. With the system in optimum condition, the average response was 1.9 seconds. (Author)

Descriptors :   (*UNDERWATER VEHICLES, *FIRE SAFETY), CONTROLLED ATMOSPHERES, BAROMETRIC PRESSURE, OXYGEN, HELIUM, NITROGEN, INFRARED DETECTORS, ULTRAVIOLET DETECTORS, FIRE EXTINGUISHERS, DIVING

Subject Categories : Marine Engineering
      Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE