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Materials Science Research Rack-1 Fire Suppressant Distribution Test Report

Materials Science Research Rack-1 Fire Suppressant Distribution Test Report


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About the Book

Fire suppressant distribution testing was performed on the Materials Science Research Rack-1 (MSRR-1), a furnace facility payload that will be installed in the U.S. Lab module of the International Space Station. Unlike racks that were tested previously, the MSRR-1 uses the Active Rack Isolation System (ARIS) to reduce vibration on experiments, so the effects of ARIS on fire suppressant distribution were unknown. Two tests were performed to map the distribution of CO2 fire suppressant throughout a mockup of the MSRR-1 designed to have the same component volumes and flowpath restrictions as the flight rack. For the first test, the average maximum CO2 concentration for the rack was 60 percent, achieved within 45 s of discharge initiation, meeting the requirement to reach 50 percent throughout the rack within 1 min. For the second test, one of the experiment mockups was removed to provide a worst-case configuration, and the average maximum CO2 concentration for the rack was 58 percent. Comparing the results of this testing with results from previous testing leads to several general conclusions that can be used to evaluate future racks. The MSRR-1 will meet the requirements for fire suppressant distribution. Primary factors that affect the ability to meet the CO2 distribution requirements are the free air volume in the rack and the total area and distribution of openings in the rack shell. The length of the suppressant flowpath and degree of tortuousness has little correlation with CO2 concentration. The total area of holes in the rack shell could be significantly increased. The free air volume could be significantly increased. To ensure the highest maximum CO2 concentration, the PFE nozzle should be inserted to the stop on the nozzle.Wieland, P. O.Marshall Space Flight CenterINTERNATIONAL SPACE STATION; RACKS (FRAMES); SPACECRAFT COMPONENTS; FIRE CONTROL; FIRE PREVENTION; MATERIALS SCIENCE; CARBON DIOXIDE; FLAMMABILITY


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Product Details
  • ISBN-13: 9781720621041
  • Publisher: Createspace Independent Publishing Platform
  • Publisher Imprint: Createspace Independent Publishing Platform
  • Height: 280 mm
  • No of Pages: 46
  • Spine Width: 3 mm
  • Width: 216 mm
  • ISBN-10: 1720621047
  • Publisher Date: 20 Aug 2018
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 132 gr


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