The following are reviewed: the requirements and design of the Environmental Control and Life Support System (ECLSS) for Space Station Freedom; a review of the G189A ECLSS computer program model developed for the complete configuration of pressurized elements or volume; and some significant computed results from this model showing transient performance for subsystems responsible for temperature and humidity control, atmosphere control and supply, air revitalization, and water recovery and management. The computed results presented are important in assessing the capabilities of the ECLSS equipment in maintaining acceptable levels of temperature, humidity, O2, N2, and CO2 in the occupied volumes during crew changeout events. These events involve up to four extra crew members from the orbiter being located temporarily in the Space Station modules in addition to the normal contingent of four crew members. These additional crew members impose additional demands on the ECLSS equipment, in order to control the levels of the aforementioned quantities. Satisfactory control of all these quantities was achieved. The maximum computed pp CO2 was in the acceptable degraded performance regime. This level is higher than the 3.00 mm Hg upper limit for normal conditions.
G189A Modelling of Space Station Freedom's ECLSS
1991
10 pages
Report
No indication
English
Manned Spacecraft , Life Support Systems , Air purification , Computer programs , Environmental control , Life support systems , Space station freedom , Spacecraft environments , Systems simulation , Carbon dioxide removal , Control systems design , Controlled atmospheres , Humidity , Temperature control , Water treatment
G189A Modelling of Space Station Freedom's ECLSS
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