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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

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 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

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

Characteristics of Post-Sorbent and High Temperature Catalytic Oxidizer Beds After Long-Term On-Orbit Use

2007-07-09
2007-01-3180
Trace contaminants are produced on-orbit by human metabolic processes and equipment off-gassing. These potentially hazardous contaminants are removed by the Trace Contaminant Control Subassembly (TCCS) in the US segment of the International Space Station (ISS). The TCCS has been operating since February 2001. Analysis of on-orbit telemetry data indicated a slow increase in the TCCS system flow resistance over the five years of operation. Two of the packed beds within the TCCS were replaced to return the TCCS to its nominal operation conditions: the high temperature catalytic oxidizer and the post-sorbent bed. Results from the examination of the returned beds are presented along with a discussion about changes to bed service life.
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

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 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 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.
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 (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 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 Status: 2002 – 2003

2003-07-07
2003-01-2589
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 2002 and March 2003. 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 with Node 3 just completing its final design review so that it can proceed towards manufacturing and the continued manufacturing of the regenerative ECLS equipment that will be integrated into Node 3.
Technical Paper

International Space Station Environmental Control and Life Support System On-Orbit Station Development Test Objective Status

2003-07-07
2003-01-2593
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 ECLS System On-Orbit Station Development Test Objective (SDTO) status from the start of assembly until the end of February 2003.
Technical Paper

Expanded Capabilities of the Extended Duration Orbiter

1990-07-01
901290
The Space Shuttle Program has recently embarked on a program which will lengthen the on-orbit stay time of the Space Shuttle. In its current configuration, the orbiter is limited to a maximum of 10 days by Environmental Control and Life Support System (ECLSS) consumables, stowage constraints, and the fuel cell reactants. The capabilities of the Extended Duration Orbiter (EDO) will permit longer duration Spacelab, Spacehab, and Commercially Developed Space Facility (CDSF) missions. Additionally, the EDO may be required for Space Station Freedom assembly operations in the late 1990's. Of the National Aeronautics and Space Administration's (NASA) fleet, both Columbia (OV-102) and Endeavour (OV-105) will be modified to accomplish extended missions of up to 16 days. As a logical follow-on, NASA is currently pursuing approval of a 28-day Extended Duration Orbiter program.
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 (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

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 (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.
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