The Space Station Freedom (SSF) airlock Depressurization/Repressurization (D/R) subsystem designed by McDonnell Douglas Aerospace Space Station Division is used to depressurize the airlock to allow egress from SSF by two pressure suited crewmembers to perform extravehicular activity (EVA), and to repressurize the airlock at the conclusion of EVA. The D/R subsystem utilizes vacuum, or D/R Equalization (D/RE), lines to accomplish the functions of venting airlock gas to space during depressurization and equalizing pressures between airlock and SSF chambers during repressurization. Categories of D/RE line requirements include performance; safety, reliability, and maintainability; and control and operations. For the development of the SSF airlock, McDonnell Douglas Aerospace has performed analysis and developed design solutions that meet these requirements while optimizing performance and cost. This paper will describe results of this analysis, including system performance data.
Vacuum Line Design and Analysis for the Space Station Freedom Airlock Depressurization/Repressurization Subsystem
Sae Technical Papers
International Conference On Environmental Systems ; 1993
1993-07-01
Conference paper
English
Optimization , Pressure , Vacuum , Reliability , Spacecraft , Gases
International Space Station (ISS) Airlock Crewlock Depressurization Methods
SAE Technical Papers | 2004
|Space Station Freedom Airlock/Extravehicular Activity Operations
SAE Technical Papers | 1990
|Space Station Freedom Airlock Depress/Repress System Design and Performance
SAE Technical Papers | 1992
|Japanese Experiment Module Airlock Pressurization/Depressurization System Design and Development
SAE Technical Papers | 1994
|Space Station Freedom Airlock Outfitting To Support Extravehicular Activity (EVA)
SAE Technical Papers | 1990
|