Browsing by Author "Khatri, Rasish"
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Item Commissioning and Operational Data of Advanced Magnetic-Bearing-Supported Carbon Dioxide Blower for Space Applications(2024 International Conference on Environmnetal Systems, 2024-07-21) Khatri, Rasish; Solis, Octavio; Hawkins, Larry; Fruth, Nick; Oliver-Butler, Kaitlin; Garr, John; Winslette, Lyndsey; Knox, JamesNASA designed and developed a next-generation CO2 removal system, the Four Bed Carbon Dioxide Scrubber, for use aboard the International Space Station. A key module of FBCO2 is the magnetic-bearing-supported blower, developed by Calnetix Technologies, which is used to move air through the sorbent beds. The blower was installed onboard the ISS in February 2023 as a retrofit into the existing FBCO2 system. The active magnetic bearings allow for high reliability, making them a choice technology for space applications. The blower is driven by an integrated permanent magnet motor and a variable speed drive. While previous papers have focused on the design of the blower and the ground test data collected for the blower, this paper focuses on the commissioning of the blower and live data captured from the blower post-commissioning. Details of the commissioning are discussed, including key features added to the magnetic bearing controller software which enabled the remote commissioning of the first five-axis AMB-supported machine to operate in space.Item Test and Evaluation of the Next Generation Blower for FBCO2 Scrubber(2023 International Conference on Environmental Systems, 2023-07-16) Oliver Butler, Kaitlin; Knox, Jim; Khatri, Rasish; Solis, Octavio; Garr, JohnThe four-bed carbon dioxide (FBCO2) scrubber was deployed on the ISS in late 2021 as a technology demonstration. The system was launched with a Honeywell blower that, while performing well, is no longer supported by the manufacturer with no available spares. Thus, NASA contracted with Calnetix Technologies to develop a next-generation, magnetic-bearing blower to meet FBCO2 demands and deliver the flowrates required for effective CO2 scrubbing. The first flight blower assembly was tested by Marshall Space Flight Center (MSFC) in the summer of 2022 and installed in FBCO2 in February 2023. This paper presents the blower performance ground testing results, with details on the test plan and test setup provided. The performance data is used not only to qualify the blower for use in FBCO2, but also to create a model for use in predictions of on-orbit performance based on available telemetry data. The paper concludes with discussions on test limitations and early FBCO2 performance data with the new blower installed.