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PRECEDING PAGE BLANK NOT FILMED Section 5 182-DAY TEST 5.1 TEST OUTLINE The test program was structured to subject the electrolysis system to the nominal design point load, 3.63 kg/day (8 lbs/day) for the first 13 weeks to approximate the essential conditions and requirements of the 90-Day Test. Thesecondhalfofthetestprogramwasintendedtoexploreoff-design conditions. The operating modes of the test are shown in Figure 29. A major groundrule of the test was a "hands-off" philosophy to approxi- mate NASA operational usage by crewmen or relatively unskilled operators in aremotelocation. Atestcommitteecomposedofthecontractorsinvolvedand three NASA development centers, the Manned Spacecraft Center (MSC), the Langley Research Center (LRC) and the Ames Research Center (ARC), controlled the pro- ceedings of the test program. The committee was chaired by MSC. Test committee management was used to pool capabilities and to allow interchange of ideas in the event that changes in operating conditions or hardware were indicated. 5.2 OVERALL SYSTEM PERFORMANCE The Electrolytic Oxygen Generator operated for 160 days, cumulative, during the 182-Day Test period. This corresponds to an 88 percent on time. A summary operational status is shown in Figure 30. A detailed system statuswithexplanatorynotesisincludedinAppendixA. Thelongestperiod of completely uninterrupted operating time was the last 53 days of the test. When the unit was stopped on the last day of the test, it was operationalwith noindicationoftrendstowardfailure. Alloftheoperatingconditionsofthe testweremet. Therewerenointerfaceproblemsandnocellormodulefailures ofanykind. Mostofthedowntimeresultedfromtroubleshootingofelectronics problems. Precedingpageblank1 73PDF Image | WATER ELECTROLYSIS SYSTEM REFURBISHMENT
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