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Technical Paper

International Space Station (ISS) Environmental Control and Life Support (ECLS) System Overview of Events:February 2005 - 2006

2006-07-17
2006-01-2056
The International Space Station (ISS) continues to mature and operate its life support equipment. Major events occurring between February 2005 and February 2006 are discussed in this paper, as are updates from previously ongoing hardware anomalies. This paper addresses the major ISS operation events over the last year. Impact to overall ISS operations is also discussed.
Technical Paper

International Space Station Environmental Control and Life Support System Status: 2005 - 2006

2006-07-17
2006-01-2055
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 March 2005 and February 2006. The ISS continued permanent crew operations, with the start of Phase 3 of the ISS Assembly Sequence. Work continued on the Phase 3 pressurized elements and the continued manufacturing and testing of the regenerative ECLS equipment.
Technical Paper

International Space Station Environmental Control and Life Support System Status: 2004 - 2005

2005-07-11
2005-01-2777
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 March 2004 and February 2005. The ISS continued permanent crew operations, with the start of Phase 3 of the ISS Assembly Sequence. Work continued on the Phase 3 pressurized elements and the continued manufacturing and testing of the regenerative ECLS equipment.
Technical Paper

Integration of Regenerative ECLSS Functions in the International Space Station U.S. Laboratory Element

2005-07-11
2005-01-2780
The International Space Station (ISS) program is implementing system architecture changes to integrate Regenerative Environmental Control and Life Support System (ECLSS) functions, including urine processing, water processing, and oxygen generation, into the U.S. Laboratory element earlier in the ISS assembly sequence. The Regenerative ECLSS functions, originally not planned for operation aboard ISS until the launch of the Node 3 element in mid-2008, are now planned for launch on the ULF-2 flight in 2007 in order to provide early system operation and checkout. After the initial phase of operation in the U.S. Laboratory element, the Regenerative ECLSS hardware is planned to be transferred to Node 3 for permanent use in support of expanded ISS crews. Operation while in the U.S. Laboratory element requires both hardware and software architecture modifications in order to provide specific hardware interfaces, meet resource requirements, and provide command and control capability.
Technical Paper

International Space Station Environmental Control and Life Support System Status: 2008 – 2009

2009-07-12
2009-01-2415
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 March 2008 and February 2009. The ISS continued permanent crew operations, with the continuation of Phase 3 of the ISS Assembly Sequence. Work continues on the last of the Phase 3 pressurized elements and the continued manufacturing and testing of the regenerative ECLS equipment.
Technical Paper

Modification of the USOS to Support Installation and Activation of the Node 3 Element

2009-07-12
2009-01-2416
The International Space Station (ISS) program is nearing an assembly complete configuration with the addition of the final resource node module in early 2010. The Node 3 module will provide critical functionality in support of permanent long duration crews aboard ISS. The new module will permanently house the regenerative Environment Control and Life Support Systems (ECLSS) and will also provide important habitability functions such as waste management and exercise facilities. The ISS program has selected the Port side of the Node 1 “Unity” module as the permanent location for Node 3 which will necessitate architecture changes to provide the required interfaces. The USOS ECLSS fluid and ventilation systems, Internal Thermal Control Systems, and Avionics Systems require significant modifications in order to support Node 3 interfaces at the Node 1 Port location since it was not initially designed for that configuration.
Technical Paper

International Space Station Environmental Control and Life Support System Acceptance Testing for Node 1 Atmosphere Control and Supply Subsystem

2009-07-12
2009-01-2354
The International Space Station (ISS) Node 1 Environmental Control and Life Support (ECLS) System is comprised of five subsystems: Atmosphere Control and Supply (ACS), Atmosphere Revitalization (AR), Fire Detection and Suppression (FDS), Temperature and Humidity Control (THC), and Water Recovery and Management (WRM). This paper provides a summary of the Node 1 ECLS ACS subsystem design and a detailed discussion of the ISS ECLS Acceptance Testing methodology utilized for that subsystem.
Technical Paper

International Space Station Environmental Control and Life Support System Status: 2007 - 2008

2008-06-29
2008-01-2131
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 March 2007 and February 2008. The ISS continued permanent crew operations, with the continuation of Phase 3 of the ISS Assembly Sequence. Work continues on the last of the Phase 3 pressurized elements and the continued manufacturing and testing of the regenerative ECLS equipment.
Technical Paper

International Space Station Environmental Control and Life Support System Acceptance Testing for Node 1 Water Recovery and Management Subsystems

2008-06-29
2008-01-2183
The International Space Station (ISS) Node 1 Environmental Control and Life Support (ECLS) System is comprised of five subsystems: Atmosphere Control and Supply (ACS), Atmosphere Revitalization (AR), Fire Detection and Suppression (FDS), Temperature and Humidity Control (THC), and Water Recovery and Management (WRM). This paper provides a summary of the Node 1 ECLS WRM subsystem design and a detailed discussion of the ISS ECLS Acceptance Testing methodology utilized for that subsystem.
Technical Paper

International Space Station Environmental Control and Life Support System Acceptance Testing for the Pressurized Mating Adapters

2008-06-29
2008-01-2182
The International Space Station (ISS) Pressurized Mating Adapters (PMAs) Environmental Control and Life Support (ECLS) System is comprised of three subsystems: Atmosphere Control and Supply (ACS), Temperature and Humidity Control (THC), and Water Recovery and Management (WRM). PMAs 1 and 2 flew to ISS on Flight 2A and Pressurized Mating Adapter (PMA) 3 flew to ISS on Flight 3A. This paper provides a summary of the PMAs ECLS design and a detailed discussion of the ISS ECLS Acceptance Testing methodologies utilized for the PMAs.
Technical Paper

International Space Station Environmental Control and Life Support System Changes for Increasing the ISS Crew Size to Six Crew Members and for Shuttle Retirement

2008-06-29
2008-01-2178
With the long anticipated change to increase the International Space Station (ISS) crew size from three to six crew members and the retirement of the Space Shuttle, changes are in work to the International Space Station (ISS) Environmental Control and Life Support (ECLS) System to support the increased on-orbit crew size and their continued operations. The Space Shuttle had provided high pressure oxygen resupply, high pressure nitrogen resupply, water resupply, atmosphere gaseous make up when the Space Shuttle is docked to ISS, and logistic cargo supply/return capability to ISS. Without the Space Shuttle additional changes need to be made to the ISS ECLS System to support the six crew members post Assembly Complete (AC). This will be in addition to the changes that were needed to support doubling the nominal ISS crew size from three to six crew members.
Journal Article

International Space Station USOS Waste and Hygiene Compartment Development

2008-06-29
2008-01-2137
The International Space Station (ISS) currently provides human waste collection and hygiene facilities in the Russian Segment Service Module (SM) which supports a three person crew. An additional set of Russian hardware, known as the АСУ system, is planned for the United States Operational Segment (USOS) to support expansion of the crew to six persons. Integration of the Russian АСУ system into the USOS incorporates direct Environmental Control and Life Support System (ECLSS) interfaces to allow more autonomous operation as well as maximized water recovery. An interface has been added to provide water directly to the system for flush purposes as well as a urine delivery interface which will result in less crew time for system maintenance. The direct urine interface will be used to recover water within the urine processing system.
Technical Paper

International Space Station (ISS) Environmental Control and Life Support (ECLS) System Overview of Events: February 2007-2008

2008-06-29
2008-01-2132
The International Space Station (ISS) continues to mature and operate its life support equipment. Major events occurring between February 2007 and February 2008 are discussed in this paper, as are updates from previously ongoing hardware anomalies. This paper addresses the major ISS operation events over the last year. Impact to overall ISS operations is also discussed.
Technical Paper

International Space Station Environmental Control and Life Support System - Verification for the Pressurized Mating Adapters

2007-07-09
2007-01-3103
The International Space Station (ISS) Pressurized Mating Adapters (PMAs) Environmental Control and Life Support (ECLS) System is comprised of three subsystems: Atmosphere Control and Supply (ACS), Temperature and Humidity Control (THC), and Water Recovery and Management (WRM). PMA 1 and PMA 2 flew to ISS on Flight 2A and PMA 3 flew to ISS on Flight 3A. This paper provides a summary of the PMAs ECLS design and the detailed Element Verification methodologies utilized during the Qualification phase for the PMAs.
Technical Paper

International Space Station Environmental Control and Life Support System Status: 2006 - 2007

2007-07-09
2007-01-3098
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 March 2006 and February 2007. The ISS continued permanent crew operations, with the start of Phase 3 of the ISS Assembly Sequence. Work continued on the Phase 3 pressurized elements and the continued manufacturing and testing of the regenerative ECLS equipment.
Technical Paper

International Space Station (ISS) Environmental Control and Life Support (ECLS) System Overview of Events: February 2006 - 2007

2007-07-09
2007-01-3099
The International Space Station (ISS) continues to mature and operate its life support equipment. Major events occurring between February 2006 and February 2007 are discussed in this paper, as are updates from previously ongoing hardware anomalies. This paper addresses the major ISS operation events over the last year. Impact to overall ISS operations is also discussed.
Technical Paper

International Space Station (ISS) Major Constituent Analyzer (MCA) On-Orbit Performance

2004-07-19
2004-01-2546
The Major Constituent Analyzer (MCA) is an essential part of the International Space Station (ISS) environmental control and life support system. The analyzer provides continuous readout of the partial pressures of six gases, nitrogen (N2), oxygen (O2), hydrogen (H2), carbon dioxide (CO2), methane (CH4) and water vapor (H2O) in the various ISS U.S. on-orbit modules. Continuous readout of the partial pressures of these gases is critical to verifying safe operation of the Atmosphere Revitalization (AR) system, Atmosphere Control System (ACS), and crew safety for Airlock Extravehicular Activities (EVAs). The MCA encountered some operational interruptions since being launched to orbit on Flight 5A in February 2001. Electronic, software, and hardware modifications and on-orbit crew maintenance of the MCA were necessary to restore its capability.
Technical Paper

Summary of Resources for the International Space Station Environmental Control and Life Support System for Core Complete Modules

2004-07-19
2004-01-2386
The Core Complete Environmental Control and Life Support (ECLS) system for the International Space Station (ISS) will consist of components and subsystems in both the United States (U.S.) and International Partner elements which together will perform the functions of Temperature and Humidity Control (THC), Atmosphere Control and Supply (ACS), Atmosphere Revitalization (AR), Water Recovery and Management (WRM), Fire Detection and Suppression (FDS), and Vacuum System (VS) for the station. Due to limited resources available on ISS, detailed attention is given to minimizing and tracking all resources associated with all systems, beginning with estimates during the hardware development phase through measured actuals when flight hardware is built and delivered. A summary of resources consumed by the current and by the addition of future U.S.
Technical Paper

International Space Station Environmental Control and Life Support System Status: 2003 - 2004

2004-07-19
2004-01-2382
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 April 2003 and March 2004. The ISS continued permanent crew operations, with the start of Phase 3 of the ISS Assembly Sequence. Work continued on the Phase 3 pressurized elements and the continued manufacturing and testing of the regenerative ECLS equipment.
Technical Paper

International Space Station Environmental Control And Life Support System Status: 2001-2002

2002-07-15
2002-01-2494
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 2001 and April 2002. The ISS continued permanent crew operations, with Phase 2 completion accomplished during this period. Work continued on the Phase 3 elements with Node 3 proceeding toward a final design review and the regenerative ECLS equipment proceeding into manufacturing.
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