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Section 1 INTRODUCTION Lockheed Missiles and Space Company (LMSC), under NASA-Langley Research Center Contract NAS 1-9728, provided a water electrolysis system in 1970 as a back-up for the primary system in the NASA-McDonnell Douglas 90-Day Manned Test (NAS1-8997). Thissystem,theNASA-LMSCElectrolyticOxygenGenerator,was designed, fabricated, acceptance tested, and delivered to the MDAC site in a four-monthperiod. Thesystemwaslocatedoutsidethemannedchamberbutwas integrated to the extent that it used chamber water, provided hydrogen to the chamberaccumulatorandoxygenviachamberaccumulatortothefour-mancrew. It operated successfullyfor 70 days of the 90-Day Test as the primary system supplying the manned chamber. At the conclusion of the 90-Day Test, the system was returned to I4SC for post-test evaluation. It was then completely disassembled, excepting electronics, to examine for wear or corrosion of components. 14 After the results of the 90-Day Testwere published, ' 2' 3 ' the question existed of whether the 70 days of successful operation of the LKSC system outside the chamber could be directly compared with less than 100 hours of operation of theprimaryunitinstalledinsidethechamber. Thedifferenceinaccessibility to trained personnel for diagnosis and repair seemed to preclude a direct comparison of hardware maturity of the two systems. Twocontractswerethenawarded: thepresentcontract,toLMSC,to refurbish the Electrolytic Oxygen Generator and provide field support for long duration testing, and the other to MDAC, Contract NAS 9-12048, to complete the checkout testing of the static vapor-feed electrolysis system (which was in- stalled inside the chamber for the 90-Day Manned Test), and to conduct a 182- Day bench test of the two competing systems at the MDAC facility. 1PDF Image | WATER ELECTROLYSIS SYSTEM REFURBISHMENT
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