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This paper focuses on an Air Evaporation Subsystem component of the Water Recovery System being developed at the Johnson Space Center in the Crew and Thermal Systems Division. Specifically, the focus is on the design and testing of the next generation of Air Evaporation Subsystem Engineering Development Unit built after the Lunar-Mars Life Support Test Project Phase III 91day test. The primary objective of testing this next generation Air Evaporation Subsystem was to demonstrate its performance as a Reverse Osmosis brine treatment subsystem by looking at the condensate quality produced from Reverse Osmosis brine and the power required to process the Reverse Osmosis brine. The secondary objectives were to develop optimal operating conditions, to optimize the use of a consumable wick and to retain as much operational data as possible through instrumentation.

Performance and fuel consumption of a single-cylinder, direct-injection diesel engine were determined for both an untreated diesel fuel and for the same fuel treated with a platinum-based fuel additive package. The platinum was in an organometallic compound which was soluble and stable in diesel fuel. The fuel additive package was supplied by Fuel Tech, Inc., of Stamford, Connecticut. The engine, a Cooperative Lubrication Research (CLR) engine, was operated for 185 hours on untreated fuel (a low sulfur no. 2 diesel fuel), 236 hours on treated fuel and then 217 hours on the untreated fuel. Engine operating conditions were varied among three steady-state operating conditions at moderate load at 1300, 1600 and 1900 RPM. At the end of the 236 hours in which the additive treated fuel was used, the average brake specific fuel consumption (BSFC) decreased by approximately 9% at 1300 RPM, 5% at 1600 RPM, and negligibly at 1900 RPM.