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The International Space Station (ISS) Environmental Control and Life Support (ECLS) system includes regenerative and non-regenerative technologies which provide the basic life support functions to support the crew, while maintaining a safe and habitable shirt-sleeve environment. Significant progress has been made over the past year in preparing for the initial assembly phase of the ISS program, now scheduled to begin construction in November 1998. Almost all ECLS hardware supporting the Phase 2 ISS assembly period has been delivered, with significant element integration testing completed for the early elements. Additionally, design activities have begun on the U.S. Phase 3 regenerative ECLS hardware. This paper provides a summary of the U.S. Environmental Control and Life Support (ECLS) system activities over the past year.

The International Space Station (ISS) Environmental Control and Life Support (ECLS) system includes regenerative and non-regenerative technologies that provide the basic life support functions to support the crew, while maintaining a safe and habitable shirtsleeve environment. This paper provides a summary of the U.S. ECLS system activities over the past year, covering the period of time between May 2000 and April 2001. Significant progress was made on assembly of the ISS, with permanent crew occupation established in November 2000. The Phase 2 portion of the assembly has just one additional flight scheduled prior to completion, with Flight 7A scheduled to bring the Airlock in June 2001. ISS budget limitations, which are still not completely resolved, have led to a reassessment of the late Phase 3 elements schedule and eventual growth to a seven person crew. The Node 3 regenerative ECLS design activities have continued with flight component manufacturing initiated.

This paper presents an overview of the Computer Aided Systems Engineering and Analysis (CASE/A)-ECLSS series which is designed as a generalised ECLSS design and analysis package. This system was developed under NASA MSEC contract NAS8-36407 to meet the Systems Analysis requirements of the Space Station ECLSS. The Space Station represents an order of magnitude increase in complexity over current Spacecraft technologies and will seriously tax current analysis techniques. This program is capable of simulating atmospheric revitalization systems, water recovery and management systems, and single phase active thermal control systems. The program evolved from both the G189A and the SINDA programs and shares the G189A architectural concepts. The designer/ analysis interface is graphics based and allows the designer to build a model by constructing a schematic of the system under consideration.

The International Space Station (ISS) Environmental Control and Life Support (ECLS) system includes regenerative and non-regenerative technologies which provide the basic life support functions to support the crew, while maintaining a safe and habitable shirt-sleeve environment. Significant progress has been made over the past year including initial assembly flights of the Functional Cargo Block (FGB) and Node 1 modules. The remaining Phase 2 elements have completed significant element integration testing with ECLS hardware deliveries complete, while the Phase 3 elements and regenerative ECLS design activities have continued. This paper provides a summary of the U.S. Environmental Control and Life Support (ECLS) system activities over the past year.

The International Space Station (ISS) Environmental Control and Life Support (ECLS) system includes regenerative and non-regenerative technologies which provide the basic life support functions to support the crew, while maintaining a safe and habitable shirtsleeve environment. This paper provides a summary of the U.S ECLS system activities over the past year, covering the period of time between May 1999 and April 2000. Assembly of the ISS has been delayed due to changes in element processing schedules. The 2A.1 logistics flight to ISS occurred in May 1999. The remaining Phase 2 elements have completed most of the element level testing and integration and are approaching final reviews for acceptance for flight. The Phase 3 regenerative ECLS designs have reached the Critical Design Review phase, while several of the Phase 3 elements have held Preliminary or Critical Design Reviews.