Zur Kurzanzeige

dc.creatorChen, Thomas
dc.creatorSweterlitsch, Jeffrey
dc.date.accessioned2022-06-21T14:28:37Z
dc.date.available2022-06-21T14:28:37Z
dc.date.issued7/10/2022
dc.identifier.otherICES-2022-417
dc.identifier.urihttps://hdl.handle.net/2346/89865
dc.descriptionThomas Chen, ERC, inc, US
dc.descriptionJeffrey Sweterlitsch, NASA, US
dc.descriptionICES501: Life Support Systems Engineering and Analysisen
dc.descriptionThe 51st International Conference on Environmental Systems was held in Saint Paul, Minnesota, US, on 10 July 2022 through 14 July 2022.en_US
dc.description.abstractA trade study was performed to compare the use of cryogenic liquid oxygen (LOX) with high pressure gaseous oxygen (GOX) and electrolysis approaches for Lunar outpost life support, which consists of a surface habitat and pressurized rover. This analysis presents the relevant mission details pertaining to a Lunar outpost architecture, discusses the viable concept of operations (ConOps) for each architecture, and compares the equivalent system mass (ESM) of the cryogenic LOX, high pressure GOX, and electrolysis approaches across different parameter trades, e.g. mission duration or extravehicular activity (EVA) frequency, for the single and 10-year mission architectures. For a single nominal mission, high pressure GOX is favored for short missions (< 50 days); cryogenic LOX is favored for a wide-range of mission durations (50 � 270 days); and the electrolysis approach is favored for long missions (> 270 days). However, when considering a 10-year mission architecture, each additional resupply negatively impacts cryogenic LOX due to the additional replacement tankage. Thus, over a 10-year mission, an electrolysis approach, which can provide all life support O2 needs utilizing solely recovered H2O, appears to be favored over cryogenic LOX. However, a real electrolysis system may need resupplied H2O due to incomplete closure of the air revitalization loop. Thus, the cryogenic LOX approach was compared with the electrolysis approaches utilizing 100% resupplied or 100% recovered H2O to approximate the resupplied to recovered H2O ratio, i.e. the degree of loop closure, where one approach trades over the other. Additionally, gaps were identified, which are expected to affect the viability and trade of LOX. These include the development of cryogenic pumps and vaporizers to generate high pressure GOX from LOX as well as understanding payload limitations which can affect O2 resupply. This analysis highlights the possible viability and favorable trade of cryogenic LOX depending on mission parameters.
dc.format.mimetypeapplication/pdf
dc.language.isoengen_US
dc.publisher51st International Conference on Environmental Systems
dc.subjectCryogenics
dc.subjectLife Support
dc.subjectECLSS
dc.subjectTrade Study
dc.subjectOxygen
dc.titleTrade Study Analysis of a Cryogenic Oxygen Architecture for Lunar Outpost Life Support
dc.typePresentationen_US


Dateien zu dieser Ressource

Thumbnail

Das Dokument erscheint in:

Zur Kurzanzeige