1997-07-01

MPLM - Environmental Control System Design Evolution 972313

The Mini Pressurised Logistics Module (MPLM) has the important job of servicing the Space Station via the National Space Transportation System (NSTS).During the previous and the on-going Alenia design activities, a continous effort is spent to optimize the MPLM performance characteristics with a possible mass reduction. The aim is to reach the best compromise between different needs: the payload requirements, the functional ground and flight operational constraints (three units qualified for 25 flight missions each), the total mass available for the payload.This paper has the objective to document the recent configuration changes and activities of the last couple of years.The two subsystems involved in this evolution are the Thermal Control (TCS) and the Environmental Control (ECLSS).Most of the MPLM equipment has already passed the Critical Design Review (CDR) step and the update situation for each piece of equipment is listed in this paper. Also at S/S level intensive test activities have been accomplished to support the actual MPLM ECS configuration. A general overview of the tests performed is presented in this paper.

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